#define XATTR_SELINUX_SUFFIX "selinux"
#define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
-#define NUM_SEL_MNT_OPTS 4
+#define NUM_SEL_MNT_OPTS 5
extern unsigned int policydb_loaded_version;
extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
-extern int selinux_compat_net;
extern struct security_operations *security_ops;
/* SECMARK reference count */
return (atomic_read(&selinux_secmark_refcount) > 0);
}
-/* Allocate and free functions for each kind of security blob. */
-
-static int cred_alloc_security(struct cred *cred)
+/*
+ * initialise the security for the init task
+ */
+static void cred_init_security(void)
{
+ struct cred *cred = (struct cred *) current->real_cred;
struct task_security_struct *tsec;
tsec = kzalloc(sizeof(struct task_security_struct), GFP_KERNEL);
if (!tsec)
- return -ENOMEM;
+ panic("SELinux: Failed to initialize initial task.\n");
- tsec->osid = tsec->sid = SECINITSID_UNLABELED;
+ tsec->osid = tsec->sid = SECINITSID_KERNEL;
cred->security = tsec;
+}
- return 0;
+/*
+ * get the security ID of a set of credentials
+ */
+static inline u32 cred_sid(const struct cred *cred)
+{
+ const struct task_security_struct *tsec;
+
+ tsec = cred->security;
+ return tsec->sid;
}
/*
- * get the security ID of a task
+ * get the objective security ID of a task
*/
static inline u32 task_sid(const struct task_struct *task)
{
- const struct task_security_struct *tsec;
u32 sid;
rcu_read_lock();
- tsec = __task_cred(task)->security;
- sid = tsec->sid;
+ sid = cred_sid(__task_cred(task));
rcu_read_unlock();
return sid;
}
/*
- * get the security ID of the current task
+ * get the subjective security ID of the current task
*/
static inline u32 current_sid(void)
{
return tsec->sid;
}
+/* Allocate and free functions for each kind of security blob. */
+
static int inode_alloc_security(struct inode *inode)
{
struct inode_security_struct *isec;
ssec->sid = SECINITSID_UNLABELED;
sk->sk_security = ssec;
- selinux_netlbl_sk_security_reset(ssec, family);
+ selinux_netlbl_sk_security_reset(ssec);
return 0;
}
Opt_fscontext = 2,
Opt_defcontext = 3,
Opt_rootcontext = 4,
+ Opt_labelsupport = 5,
};
static const match_table_t tokens = {
{Opt_fscontext, FSCONTEXT_STR "%s"},
{Opt_defcontext, DEFCONTEXT_STR "%s"},
{Opt_rootcontext, ROOTCONTEXT_STR "%s"},
+ {Opt_labelsupport, LABELSUPP_STR},
{Opt_error, NULL},
};
}
}
- sbsec->initialized = 1;
+ sbsec->flags |= (SE_SBINITIALIZED | SE_SBLABELSUPP);
if (sbsec->behavior > ARRAY_SIZE(labeling_behaviors))
printk(KERN_ERR "SELinux: initialized (dev %s, type %s), unknown behavior\n",
sb->s_id, sb->s_type->name,
labeling_behaviors[sbsec->behavior-1]);
+ if (sbsec->behavior == SECURITY_FS_USE_GENFS ||
+ sbsec->behavior == SECURITY_FS_USE_MNTPOINT ||
+ sbsec->behavior == SECURITY_FS_USE_NONE ||
+ sbsec->behavior > ARRAY_SIZE(labeling_behaviors))
+ sbsec->flags &= ~SE_SBLABELSUPP;
+
/* Initialize the root inode. */
rc = inode_doinit_with_dentry(root_inode, root);
security_init_mnt_opts(opts);
- if (!sbsec->initialized)
+ if (!(sbsec->flags & SE_SBINITIALIZED))
return -EINVAL;
if (!ss_initialized)
return -EINVAL;
- /*
- * if we ever use sbsec flags for anything other than tracking mount
- * settings this is going to need a mask
- */
- tmp = sbsec->flags;
+ tmp = sbsec->flags & SE_MNTMASK;
/* count the number of mount options for this sb */
for (i = 0; i < 8; i++) {
if (tmp & 0x01)
opts->num_mnt_opts++;
tmp >>= 1;
}
+ /* Check if the Label support flag is set */
+ if (sbsec->flags & SE_SBLABELSUPP)
+ opts->num_mnt_opts++;
opts->mnt_opts = kcalloc(opts->num_mnt_opts, sizeof(char *), GFP_ATOMIC);
if (!opts->mnt_opts) {
opts->mnt_opts[i] = context;
opts->mnt_opts_flags[i++] = ROOTCONTEXT_MNT;
}
+ if (sbsec->flags & SE_SBLABELSUPP) {
+ opts->mnt_opts[i] = NULL;
+ opts->mnt_opts_flags[i++] = SE_SBLABELSUPP;
+ }
BUG_ON(i != opts->num_mnt_opts);
static int bad_option(struct superblock_security_struct *sbsec, char flag,
u32 old_sid, u32 new_sid)
{
+ char mnt_flags = sbsec->flags & SE_MNTMASK;
+
/* check if the old mount command had the same options */
- if (sbsec->initialized)
+ if (sbsec->flags & SE_SBINITIALIZED)
if (!(sbsec->flags & flag) ||
(old_sid != new_sid))
return 1;
/* check if we were passed the same options twice,
* aka someone passed context=a,context=b
*/
- if (!sbsec->initialized)
- if (sbsec->flags & flag)
+ if (!(sbsec->flags & SE_SBINITIALIZED))
+ if (mnt_flags & flag)
return 1;
return 0;
}
* this sb does not set any security options. (The first options
* will be used for both mounts)
*/
- if (sbsec->initialized && (sb->s_type->fs_flags & FS_BINARY_MOUNTDATA)
+ if ((sbsec->flags & SE_SBINITIALIZED) && (sb->s_type->fs_flags & FS_BINARY_MOUNTDATA)
&& (num_opts == 0))
goto out;
*/
for (i = 0; i < num_opts; i++) {
u32 sid;
+
+ if (flags[i] == SE_SBLABELSUPP)
+ continue;
rc = security_context_to_sid(mount_options[i],
strlen(mount_options[i]), &sid);
if (rc) {
}
}
- if (sbsec->initialized) {
+ if (sbsec->flags & SE_SBINITIALIZED) {
/* previously mounted with options, but not on this attempt? */
- if (sbsec->flags && !num_opts)
+ if ((sbsec->flags & SE_MNTMASK) && !num_opts)
goto out_double_mount;
rc = 0;
goto out;
}
if (strcmp(sb->s_type->name, "proc") == 0)
- sbsec->proc = 1;
+ sbsec->flags |= SE_SBPROC;
/* Determine the labeling behavior to use for this filesystem type. */
- rc = security_fs_use(sb->s_type->name, &sbsec->behavior, &sbsec->sid);
+ rc = security_fs_use((sbsec->flags & SE_SBPROC) ? "proc" : sb->s_type->name, &sbsec->behavior, &sbsec->sid);
if (rc) {
printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n",
__func__, sb->s_type->name, rc);
}
/* how can we clone if the old one wasn't set up?? */
- BUG_ON(!oldsbsec->initialized);
+ BUG_ON(!(oldsbsec->flags & SE_SBINITIALIZED));
/* if fs is reusing a sb, just let its options stand... */
- if (newsbsec->initialized)
+ if (newsbsec->flags & SE_SBINITIALIZED)
return;
mutex_lock(&newsbsec->lock);
goto out_err;
}
break;
-
+ case Opt_labelsupport:
+ break;
default:
rc = -EINVAL;
printk(KERN_WARNING "SELinux: unknown mount option\n");
char *prefix;
for (i = 0; i < opts->num_mnt_opts; i++) {
- char *has_comma = strchr(opts->mnt_opts[i], ',');
+ char *has_comma;
+
+ if (opts->mnt_opts[i])
+ has_comma = strchr(opts->mnt_opts[i], ',');
+ else
+ has_comma = NULL;
switch (opts->mnt_opts_flags[i]) {
case CONTEXT_MNT:
case DEFCONTEXT_MNT:
prefix = DEFCONTEXT_STR;
break;
+ case SE_SBLABELSUPP:
+ seq_putc(m, ',');
+ seq_puts(m, LABELSUPP_STR);
+ continue;
default:
BUG();
};
goto out_unlock;
sbsec = inode->i_sb->s_security;
- if (!sbsec->initialized) {
+ if (!(sbsec->flags & SE_SBINITIALIZED)) {
/* Defer initialization until selinux_complete_init,
after the initial policy is loaded and the security
server is ready to handle calls. */
dentry = d_find_alias(inode);
}
if (!dentry) {
- printk(KERN_WARNING "SELinux: %s: no dentry for dev=%s "
- "ino=%ld\n", __func__, inode->i_sb->s_id,
- inode->i_ino);
+ /*
+ * this is can be hit on boot when a file is accessed
+ * before the policy is loaded. When we load policy we
+ * may find inodes that have no dentry on the
+ * sbsec->isec_head list. No reason to complain as these
+ * will get fixed up the next time we go through
+ * inode_doinit with a dentry, before these inodes could
+ * be used again by userspace.
+ */
goto out_unlock;
}
len = INITCONTEXTLEN;
- context = kmalloc(len, GFP_NOFS);
+ context = kmalloc(len+1, GFP_NOFS);
if (!context) {
rc = -ENOMEM;
dput(dentry);
goto out_unlock;
}
+ context[len] = '\0';
rc = inode->i_op->getxattr(dentry, XATTR_NAME_SELINUX,
context, len);
if (rc == -ERANGE) {
}
kfree(context);
len = rc;
- context = kmalloc(len, GFP_NOFS);
+ context = kmalloc(len+1, GFP_NOFS);
if (!context) {
rc = -ENOMEM;
dput(dentry);
goto out_unlock;
}
+ context[len] = '\0';
rc = inode->i_op->getxattr(dentry,
XATTR_NAME_SELINUX,
context, len);
sbsec->def_sid,
GFP_NOFS);
if (rc) {
- printk(KERN_WARNING "SELinux: %s: context_to_sid(%s) "
- "returned %d for dev=%s ino=%ld\n",
- __func__, context, -rc,
- inode->i_sb->s_id, inode->i_ino);
+ char *dev = inode->i_sb->s_id;
+ unsigned long ino = inode->i_ino;
+
+ if (rc == -EINVAL) {
+ if (printk_ratelimit())
+ printk(KERN_NOTICE "SELinux: inode=%lu on dev=%s was found to have an invalid "
+ "context=%s. This indicates you may need to relabel the inode or the "
+ "filesystem in question.\n", ino, dev, context);
+ } else {
+ printk(KERN_WARNING "SELinux: %s: context_to_sid(%s) "
+ "returned %d for dev=%s ino=%ld\n",
+ __func__, context, -rc, dev, ino);
+ }
kfree(context);
/* Leave with the unlabeled SID */
rc = 0;
/* Default to the fs superblock SID. */
isec->sid = sbsec->sid;
- if (sbsec->proc && !S_ISLNK(inode->i_mode)) {
+ if ((sbsec->flags & SE_SBPROC) && !S_ISLNK(inode->i_mode)) {
struct proc_inode *proci = PROC_I(inode);
if (proci->pde) {
isec->sclass = inode_mode_to_security_class(inode->i_mode);
}
/*
- * Check permission betweeen a pair of tasks, e.g. signal checks,
+ * Check permission between a pair of credentials
+ * fork check, ptrace check, etc.
+ */
+static int cred_has_perm(const struct cred *actor,
+ const struct cred *target,
+ u32 perms)
+{
+ u32 asid = cred_sid(actor), tsid = cred_sid(target);
+
+ return avc_has_perm(asid, tsid, SECCLASS_PROCESS, perms, NULL);
+}
+
+/*
+ * Check permission between a pair of tasks, e.g. signal checks,
* fork check, ptrace check, etc.
* tsk1 is the actor and tsk2 is the target
+ * - this uses the default subjective creds of tsk1
*/
static int task_has_perm(const struct task_struct *tsk1,
const struct task_struct *tsk2,
return avc_has_perm(sid1, sid2, SECCLASS_PROCESS, perms, NULL);
}
+/*
+ * Check permission between current and another task, e.g. signal checks,
+ * fork check, ptrace check, etc.
+ * current is the actor and tsk2 is the target
+ * - this uses current's subjective creds
+ */
+static int current_has_perm(const struct task_struct *tsk,
+ u32 perms)
+{
+ u32 sid, tsid;
+
+ sid = current_sid();
+ tsid = task_sid(tsk);
+ return avc_has_perm(sid, tsid, SECCLASS_PROCESS, perms, NULL);
+}
+
#if CAP_LAST_CAP > 63
#error Fix SELinux to handle capabilities > 63.
#endif
/* Check whether a task is allowed to use a capability. */
static int task_has_capability(struct task_struct *tsk,
+ const struct cred *cred,
int cap, int audit)
{
struct avc_audit_data ad;
struct av_decision avd;
u16 sclass;
- u32 sid = task_sid(tsk);
+ u32 sid = cred_sid(cred);
u32 av = CAP_TO_MASK(cap);
int rc;
/* Check whether a task has a particular permission to an inode.
The 'adp' parameter is optional and allows other audit
data to be passed (e.g. the dentry). */
-static int inode_has_perm(struct task_struct *tsk,
+static int inode_has_perm(const struct cred *cred,
struct inode *inode,
u32 perms,
struct avc_audit_data *adp)
if (unlikely(IS_PRIVATE(inode)))
return 0;
- sid = task_sid(tsk);
+ sid = cred_sid(cred);
isec = inode->i_security;
if (!adp) {
/* Same as inode_has_perm, but pass explicit audit data containing
the dentry to help the auditing code to more easily generate the
pathname if needed. */
-static inline int dentry_has_perm(struct task_struct *tsk,
+static inline int dentry_has_perm(const struct cred *cred,
struct vfsmount *mnt,
struct dentry *dentry,
u32 av)
{
struct inode *inode = dentry->d_inode;
struct avc_audit_data ad;
+
AVC_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.mnt = mnt;
ad.u.fs.path.dentry = dentry;
- return inode_has_perm(tsk, inode, av, &ad);
+ return inode_has_perm(cred, inode, av, &ad);
}
/* Check whether a task can use an open file descriptor to
has the same SID as the process. If av is zero, then
access to the file is not checked, e.g. for cases
where only the descriptor is affected like seek. */
-static int file_has_perm(struct task_struct *tsk,
- struct file *file,
- u32 av)
+static int file_has_perm(const struct cred *cred,
+ struct file *file,
+ u32 av)
{
struct file_security_struct *fsec = file->f_security;
struct inode *inode = file->f_path.dentry->d_inode;
struct avc_audit_data ad;
- u32 sid = task_sid(tsk);
+ u32 sid = cred_sid(cred);
int rc;
AVC_AUDIT_DATA_INIT(&ad, FS);
FD__USE,
&ad);
if (rc)
- return rc;
+ goto out;
}
/* av is zero if only checking access to the descriptor. */
+ rc = 0;
if (av)
- return inode_has_perm(tsk, inode, av, &ad);
+ rc = inode_has_perm(cred, inode, av, &ad);
- return 0;
+out:
+ return rc;
}
/* Check whether a task can create a file. */
if (rc)
return rc;
- if (!newsid || sbsec->behavior == SECURITY_FS_USE_MNTPOINT) {
+ if (!newsid || !(sbsec->flags & SE_SBLABELSUPP)) {
rc = security_transition_sid(sid, dsec->sid, tclass, &newsid);
if (rc)
return rc;
}
/* Check whether a task can perform a filesystem operation. */
-static int superblock_has_perm(struct task_struct *tsk,
+static int superblock_has_perm(const struct cred *cred,
struct super_block *sb,
u32 perms,
struct avc_audit_data *ad)
{
struct superblock_security_struct *sbsec;
- u32 sid = task_sid(tsk);
+ u32 sid = cred_sid(cred);
sbsec = sb->s_security;
return avc_has_perm(sid, sbsec->sid, SECCLASS_FILESYSTEM, perms, ad);
av |= FIFO_FILE__OPEN;
else if (S_ISDIR(mode))
av |= DIR__OPEN;
+ else if (S_ISSOCK(mode))
+ av |= SOCK_FILE__OPEN;
else
printk(KERN_ERR "SELinux: WARNING: inside %s with "
"unknown mode:%o\n", __func__, mode);
{
int rc;
- rc = secondary_ops->ptrace_may_access(child, mode);
+ rc = cap_ptrace_may_access(child, mode);
if (rc)
return rc;
return avc_has_perm(sid, csid, SECCLASS_FILE, FILE__READ, NULL);
}
- return task_has_perm(current, child, PROCESS__PTRACE);
+ return current_has_perm(child, PROCESS__PTRACE);
}
static int selinux_ptrace_traceme(struct task_struct *parent)
{
int rc;
- rc = secondary_ops->ptrace_traceme(parent);
+ rc = cap_ptrace_traceme(parent);
if (rc)
return rc;
{
int error;
- error = task_has_perm(current, target, PROCESS__GETCAP);
+ error = current_has_perm(target, PROCESS__GETCAP);
if (error)
return error;
- return secondary_ops->capget(target, effective, inheritable, permitted);
+ return cap_capget(target, effective, inheritable, permitted);
}
-static int selinux_capset_check(const kernel_cap_t *effective,
- const kernel_cap_t *inheritable,
- const kernel_cap_t *permitted)
+static int selinux_capset(struct cred *new, const struct cred *old,
+ const kernel_cap_t *effective,
+ const kernel_cap_t *inheritable,
+ const kernel_cap_t *permitted)
{
int error;
- error = secondary_ops->capset_check(effective, inheritable, permitted);
+ error = cap_capset(new, old,
+ effective, inheritable, permitted);
if (error)
return error;
- return task_has_perm(current, current, PROCESS__SETCAP);
+ return cred_has_perm(old, new, PROCESS__SETCAP);
}
-static void selinux_capset_set(const kernel_cap_t *effective,
- const kernel_cap_t *inheritable,
- const kernel_cap_t *permitted)
-{
- secondary_ops->capset_set(effective, inheritable, permitted);
-}
+/*
+ * (This comment used to live with the selinux_task_setuid hook,
+ * which was removed).
+ *
+ * Since setuid only affects the current process, and since the SELinux
+ * controls are not based on the Linux identity attributes, SELinux does not
+ * need to control this operation. However, SELinux does control the use of
+ * the CAP_SETUID and CAP_SETGID capabilities using the capable hook.
+ */
-static int selinux_capable(struct task_struct *tsk, int cap, int audit)
+static int selinux_capable(struct task_struct *tsk, const struct cred *cred,
+ int cap, int audit)
{
int rc;
- rc = secondary_ops->capable(tsk, cap, audit);
+ rc = cap_capable(tsk, cred, cap, audit);
if (rc)
return rc;
- return task_has_capability(tsk, cap, audit);
+ return task_has_capability(tsk, cred, cap, audit);
}
static int selinux_sysctl_get_sid(ctl_table *table, u16 tclass, u32 *sid)
static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
{
+ const struct cred *cred = current_cred();
int rc = 0;
if (!sb)
case Q_QUOTAOFF:
case Q_SETINFO:
case Q_SETQUOTA:
- rc = superblock_has_perm(current, sb, FILESYSTEM__QUOTAMOD,
- NULL);
+ rc = superblock_has_perm(cred, sb, FILESYSTEM__QUOTAMOD, NULL);
break;
case Q_GETFMT:
case Q_GETINFO:
case Q_GETQUOTA:
- rc = superblock_has_perm(current, sb, FILESYSTEM__QUOTAGET,
- NULL);
+ rc = superblock_has_perm(cred, sb, FILESYSTEM__QUOTAGET, NULL);
break;
default:
rc = 0; /* let the kernel handle invalid cmds */
static int selinux_quota_on(struct dentry *dentry)
{
- return dentry_has_perm(current, NULL, dentry, FILE__QUOTAON);
+ const struct cred *cred = current_cred();
+
+ return dentry_has_perm(cred, NULL, dentry, FILE__QUOTAON);
}
static int selinux_syslog(int type)
{
int rc;
- rc = secondary_ops->syslog(type);
+ rc = cap_syslog(type);
if (rc)
return rc;
* mapping. 0 means there is enough memory for the allocation to
* succeed and -ENOMEM implies there is not.
*
- * Note that secondary_ops->capable and task_has_perm_noaudit return 0
- * if the capability is granted, but __vm_enough_memory requires 1 if
- * the capability is granted.
- *
* Do not audit the selinux permission check, as this is applied to all
* processes that allocate mappings.
*/
{
int rc, cap_sys_admin = 0;
- rc = selinux_capable(current, CAP_SYS_ADMIN, SECURITY_CAP_NOAUDIT);
+ rc = selinux_capable(current, current_cred(), CAP_SYS_ADMIN,
+ SECURITY_CAP_NOAUDIT);
if (rc == 0)
cap_sys_admin = 1;
/* binprm security operations */
-static int selinux_bprm_alloc_security(struct linux_binprm *bprm)
+static int selinux_bprm_set_creds(struct linux_binprm *bprm)
{
- struct bprm_security_struct *bsec;
-
- bsec = kzalloc(sizeof(struct bprm_security_struct), GFP_KERNEL);
- if (!bsec)
- return -ENOMEM;
-
- bsec->sid = SECINITSID_UNLABELED;
- bsec->set = 0;
-
- bprm->security = bsec;
- return 0;
-}
-
-static int selinux_bprm_set_security(struct linux_binprm *bprm)
-{
- struct task_security_struct *tsec;
- struct inode *inode = bprm->file->f_path.dentry->d_inode;
+ const struct task_security_struct *old_tsec;
+ struct task_security_struct *new_tsec;
struct inode_security_struct *isec;
- struct bprm_security_struct *bsec;
- u32 newsid;
struct avc_audit_data ad;
+ struct inode *inode = bprm->file->f_path.dentry->d_inode;
int rc;
- rc = secondary_ops->bprm_set_security(bprm);
+ rc = cap_bprm_set_creds(bprm);
if (rc)
return rc;
- bsec = bprm->security;
-
- if (bsec->set)
+ /* SELinux context only depends on initial program or script and not
+ * the script interpreter */
+ if (bprm->cred_prepared)
return 0;
- tsec = current_security();
+ old_tsec = current_security();
+ new_tsec = bprm->cred->security;
isec = inode->i_security;
/* Default to the current task SID. */
- bsec->sid = tsec->sid;
+ new_tsec->sid = old_tsec->sid;
+ new_tsec->osid = old_tsec->sid;
/* Reset fs, key, and sock SIDs on execve. */
- tsec->create_sid = 0;
- tsec->keycreate_sid = 0;
- tsec->sockcreate_sid = 0;
+ new_tsec->create_sid = 0;
+ new_tsec->keycreate_sid = 0;
+ new_tsec->sockcreate_sid = 0;
- if (tsec->exec_sid) {
- newsid = tsec->exec_sid;
+ if (old_tsec->exec_sid) {
+ new_tsec->sid = old_tsec->exec_sid;
/* Reset exec SID on execve. */
- tsec->exec_sid = 0;
+ new_tsec->exec_sid = 0;
} else {
/* Check for a default transition on this program. */
- rc = security_transition_sid(tsec->sid, isec->sid,
- SECCLASS_PROCESS, &newsid);
+ rc = security_transition_sid(old_tsec->sid, isec->sid,
+ SECCLASS_PROCESS, &new_tsec->sid);
if (rc)
return rc;
}
ad.u.fs.path = bprm->file->f_path;
if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
- newsid = tsec->sid;
+ new_tsec->sid = old_tsec->sid;
- if (tsec->sid == newsid) {
- rc = avc_has_perm(tsec->sid, isec->sid,
+ if (new_tsec->sid == old_tsec->sid) {
+ rc = avc_has_perm(old_tsec->sid, isec->sid,
SECCLASS_FILE, FILE__EXECUTE_NO_TRANS, &ad);
if (rc)
return rc;
} else {
/* Check permissions for the transition. */
- rc = avc_has_perm(tsec->sid, newsid,
+ rc = avc_has_perm(old_tsec->sid, new_tsec->sid,
SECCLASS_PROCESS, PROCESS__TRANSITION, &ad);
if (rc)
return rc;
- rc = avc_has_perm(newsid, isec->sid,
+ rc = avc_has_perm(new_tsec->sid, isec->sid,
SECCLASS_FILE, FILE__ENTRYPOINT, &ad);
if (rc)
return rc;
- /* Clear any possibly unsafe personality bits on exec: */
- current->personality &= ~PER_CLEAR_ON_SETID;
+ /* Check for shared state */
+ if (bprm->unsafe & LSM_UNSAFE_SHARE) {
+ rc = avc_has_perm(old_tsec->sid, new_tsec->sid,
+ SECCLASS_PROCESS, PROCESS__SHARE,
+ NULL);
+ if (rc)
+ return -EPERM;
+ }
- /* Set the security field to the new SID. */
- bsec->sid = newsid;
+ /* Make sure that anyone attempting to ptrace over a task that
+ * changes its SID has the appropriate permit */
+ if (bprm->unsafe &
+ (LSM_UNSAFE_PTRACE | LSM_UNSAFE_PTRACE_CAP)) {
+ struct task_struct *tracer;
+ struct task_security_struct *sec;
+ u32 ptsid = 0;
+
+ rcu_read_lock();
+ tracer = tracehook_tracer_task(current);
+ if (likely(tracer != NULL)) {
+ sec = __task_cred(tracer)->security;
+ ptsid = sec->sid;
+ }
+ rcu_read_unlock();
+
+ if (ptsid != 0) {
+ rc = avc_has_perm(ptsid, new_tsec->sid,
+ SECCLASS_PROCESS,
+ PROCESS__PTRACE, NULL);
+ if (rc)
+ return -EPERM;
+ }
+ }
+
+ /* Clear any possibly unsafe personality bits on exec: */
+ bprm->per_clear |= PER_CLEAR_ON_SETID;
}
- bsec->set = 1;
return 0;
}
-static int selinux_bprm_check_security(struct linux_binprm *bprm)
-{
- return secondary_ops->bprm_check_security(bprm);
-}
-
-
static int selinux_bprm_secureexec(struct linux_binprm *bprm)
{
const struct cred *cred = current_cred();
the noatsecure permission is granted between
the two SIDs, i.e. ahp returns 0. */
atsecure = avc_has_perm(osid, sid,
- SECCLASS_PROCESS,
- PROCESS__NOATSECURE, NULL);
+ SECCLASS_PROCESS,
+ PROCESS__NOATSECURE, NULL);
}
- return (atsecure || secondary_ops->bprm_secureexec(bprm));
-}
-
-static void selinux_bprm_free_security(struct linux_binprm *bprm)
-{
- kfree(bprm->security);
- bprm->security = NULL;
+ return (atsecure || cap_bprm_secureexec(bprm));
}
extern struct vfsmount *selinuxfs_mount;
extern struct dentry *selinux_null;
/* Derived from fs/exec.c:flush_old_files. */
-static inline void flush_unauthorized_files(struct files_struct *files)
+static inline void flush_unauthorized_files(const struct cred *cred,
+ struct files_struct *files)
{
struct avc_audit_data ad;
struct file *file, *devnull = NULL;
interested in the inode-based check here. */
file = list_first_entry(&tty->tty_files, struct file, f_u.fu_list);
inode = file->f_path.dentry->d_inode;
- if (inode_has_perm(current, inode,
+ if (inode_has_perm(cred, inode,
FILE__READ | FILE__WRITE, NULL)) {
drop_tty = 1;
}
file = fget(i);
if (!file)
continue;
- if (file_has_perm(current,
+ if (file_has_perm(cred,
file,
file_to_av(file))) {
sys_close(i);
if (devnull) {
get_file(devnull);
} else {
- devnull = dentry_open(dget(selinux_null), mntget(selinuxfs_mount), O_RDWR);
+ devnull = dentry_open(
+ dget(selinux_null),
+ mntget(selinuxfs_mount),
+ O_RDWR, cred);
if (IS_ERR(devnull)) {
devnull = NULL;
put_unused_fd(fd);
spin_unlock(&files->file_lock);
}
-static void selinux_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
+/*
+ * Prepare a process for imminent new credential changes due to exec
+ */
+static void selinux_bprm_committing_creds(struct linux_binprm *bprm)
{
- struct task_security_struct *tsec;
- struct bprm_security_struct *bsec;
- u32 sid;
- int rc;
-
- secondary_ops->bprm_apply_creds(bprm, unsafe);
-
- tsec = current_security();
-
- bsec = bprm->security;
- sid = bsec->sid;
+ struct task_security_struct *new_tsec;
+ struct rlimit *rlim, *initrlim;
+ int rc, i;
- tsec->osid = tsec->sid;
- bsec->unsafe = 0;
- if (tsec->sid != sid) {
- /* Check for shared state. If not ok, leave SID
- unchanged and kill. */
- if (unsafe & LSM_UNSAFE_SHARE) {
- rc = avc_has_perm(tsec->sid, sid, SECCLASS_PROCESS,
- PROCESS__SHARE, NULL);
- if (rc) {
- bsec->unsafe = 1;
- return;
- }
- }
+ new_tsec = bprm->cred->security;
+ if (new_tsec->sid == new_tsec->osid)
+ return;
- /* Check for ptracing, and update the task SID if ok.
- Otherwise, leave SID unchanged and kill. */
- if (unsafe & (LSM_UNSAFE_PTRACE | LSM_UNSAFE_PTRACE_CAP)) {
- struct task_struct *tracer;
- struct task_security_struct *sec;
- u32 ptsid = 0;
+ /* Close files for which the new task SID is not authorized. */
+ flush_unauthorized_files(bprm->cred, current->files);
- rcu_read_lock();
- tracer = tracehook_tracer_task(current);
- if (likely(tracer != NULL)) {
- sec = __task_cred(tracer)->security;
- ptsid = sec->sid;
- }
- rcu_read_unlock();
+ /* Always clear parent death signal on SID transitions. */
+ current->pdeath_signal = 0;
- if (ptsid != 0) {
- rc = avc_has_perm(ptsid, sid, SECCLASS_PROCESS,
- PROCESS__PTRACE, NULL);
- if (rc) {
- bsec->unsafe = 1;
- return;
- }
- }
+ /* Check whether the new SID can inherit resource limits from the old
+ * SID. If not, reset all soft limits to the lower of the current
+ * task's hard limit and the init task's soft limit.
+ *
+ * Note that the setting of hard limits (even to lower them) can be
+ * controlled by the setrlimit check. The inclusion of the init task's
+ * soft limit into the computation is to avoid resetting soft limits
+ * higher than the default soft limit for cases where the default is
+ * lower than the hard limit, e.g. RLIMIT_CORE or RLIMIT_STACK.
+ */
+ rc = avc_has_perm(new_tsec->osid, new_tsec->sid, SECCLASS_PROCESS,
+ PROCESS__RLIMITINH, NULL);
+ if (rc) {
+ for (i = 0; i < RLIM_NLIMITS; i++) {
+ rlim = current->signal->rlim + i;
+ initrlim = init_task.signal->rlim + i;
+ rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur);
}
- tsec->sid = sid;
+ update_rlimit_cpu(rlim->rlim_cur);
}
}
/*
- * called after apply_creds without the task lock held
+ * Clean up the process immediately after the installation of new credentials
+ * due to exec
*/
-static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
+static void selinux_bprm_committed_creds(struct linux_binprm *bprm)
{
- struct task_security_struct *tsec;
- struct rlimit *rlim, *initrlim;
+ const struct task_security_struct *tsec = current_security();
struct itimerval itimer;
- struct bprm_security_struct *bsec;
struct sighand_struct *psig;
+ u32 osid, sid;
int rc, i;
unsigned long flags;
- tsec = current_security();
- bsec = bprm->security;
+ osid = tsec->osid;
+ sid = tsec->sid;
- if (bsec->unsafe) {
- force_sig_specific(SIGKILL, current);
- return;
- }
- if (tsec->osid == tsec->sid)
+ if (sid == osid)
return;
- /* Close files for which the new task SID is not authorized. */
- flush_unauthorized_files(current->files);
-
- /* Check whether the new SID can inherit signal state
- from the old SID. If not, clear itimers to avoid
- subsequent signal generation and flush and unblock
- signals. This must occur _after_ the task SID has
- been updated so that any kill done after the flush
- will be checked against the new SID. */
- rc = avc_has_perm(tsec->osid, tsec->sid, SECCLASS_PROCESS,
- PROCESS__SIGINH, NULL);
+ /* Check whether the new SID can inherit signal state from the old SID.
+ * If not, clear itimers to avoid subsequent signal generation and
+ * flush and unblock signals.
+ *
+ * This must occur _after_ the task SID has been updated so that any
+ * kill done after the flush will be checked against the new SID.
+ */
+ rc = avc_has_perm(osid, sid, SECCLASS_PROCESS, PROCESS__SIGINH, NULL);
if (rc) {
memset(&itimer, 0, sizeof itimer);
for (i = 0; i < 3; i++)
spin_unlock_irq(¤t->sighand->siglock);
}
- /* Always clear parent death signal on SID transitions. */
- current->pdeath_signal = 0;
-
- /* Check whether the new SID can inherit resource limits
- from the old SID. If not, reset all soft limits to
- the lower of the current task's hard limit and the init
- task's soft limit. Note that the setting of hard limits
- (even to lower them) can be controlled by the setrlimit
- check. The inclusion of the init task's soft limit into
- the computation is to avoid resetting soft limits higher
- than the default soft limit for cases where the default
- is lower than the hard limit, e.g. RLIMIT_CORE or
- RLIMIT_STACK.*/
- rc = avc_has_perm(tsec->osid, tsec->sid, SECCLASS_PROCESS,
- PROCESS__RLIMITINH, NULL);
- if (rc) {
- for (i = 0; i < RLIM_NLIMITS; i++) {
- rlim = current->signal->rlim + i;
- initrlim = init_task.signal->rlim+i;
- rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur);
- }
- update_rlimit_cpu(rlim->rlim_cur);
- }
-
- /* Wake up the parent if it is waiting so that it can
- recheck wait permission to the new task SID. */
+ /* Wake up the parent if it is waiting so that it can recheck
+ * wait permission to the new task SID. */
read_lock_irq(&tasklist_lock);
psig = current->parent->sighand;
spin_lock_irqsave(&psig->siglock, flags);
return (match_prefix(CONTEXT_STR, sizeof(CONTEXT_STR)-1, option, len) ||
match_prefix(FSCONTEXT_STR, sizeof(FSCONTEXT_STR)-1, option, len) ||
match_prefix(DEFCONTEXT_STR, sizeof(DEFCONTEXT_STR)-1, option, len) ||
- match_prefix(ROOTCONTEXT_STR, sizeof(ROOTCONTEXT_STR)-1, option, len));
+ match_prefix(ROOTCONTEXT_STR, sizeof(ROOTCONTEXT_STR)-1, option, len) ||
+ match_prefix(LABELSUPP_STR, sizeof(LABELSUPP_STR)-1, option, len));
}
static inline void take_option(char **to, char *from, int *first, int len)
return rc;
}
-static int selinux_sb_kern_mount(struct super_block *sb, void *data)
+static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
{
+ const struct cred *cred = current_cred();
struct avc_audit_data ad;
int rc;
if (rc)
return rc;
+ /* Allow all mounts performed by the kernel */
+ if (flags & MS_KERNMOUNT)
+ return 0;
+
AVC_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = sb->s_root;
- return superblock_has_perm(current, sb, FILESYSTEM__MOUNT, &ad);
+ return superblock_has_perm(cred, sb, FILESYSTEM__MOUNT, &ad);
}
static int selinux_sb_statfs(struct dentry *dentry)
{
+ const struct cred *cred = current_cred();
struct avc_audit_data ad;
AVC_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = dentry->d_sb->s_root;
- return superblock_has_perm(current, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
+ return superblock_has_perm(cred, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
}
static int selinux_mount(char *dev_name,
unsigned long flags,
void *data)
{
- int rc;
-
- rc = secondary_ops->sb_mount(dev_name, path, type, flags, data);
- if (rc)
- return rc;
+ const struct cred *cred = current_cred();
if (flags & MS_REMOUNT)
- return superblock_has_perm(current, path->mnt->mnt_sb,
+ return superblock_has_perm(cred, path->mnt->mnt_sb,
FILESYSTEM__REMOUNT, NULL);
else
- return dentry_has_perm(current, path->mnt, path->dentry,
+ return dentry_has_perm(cred, path->mnt, path->dentry,
FILE__MOUNTON);
}
static int selinux_umount(struct vfsmount *mnt, int flags)
{
- int rc;
-
- rc = secondary_ops->sb_umount(mnt, flags);
- if (rc)
- return rc;
+ const struct cred *cred = current_cred();
- return superblock_has_perm(current, mnt->mnt_sb,
+ return superblock_has_perm(cred, mnt->mnt_sb,
FILESYSTEM__UNMOUNT, NULL);
}
sid = tsec->sid;
newsid = tsec->create_sid;
- if (!newsid || sbsec->behavior == SECURITY_FS_USE_MNTPOINT) {
+ if (!newsid || !(sbsec->flags & SE_SBLABELSUPP)) {
rc = security_transition_sid(sid, dsec->sid,
inode_mode_to_security_class(inode->i_mode),
&newsid);
}
/* Possibly defer initialization to selinux_complete_init. */
- if (sbsec->initialized) {
+ if (sbsec->flags & SE_SBINITIALIZED) {
struct inode_security_struct *isec = inode->i_security;
isec->sclass = inode_mode_to_security_class(inode->i_mode);
isec->sid = newsid;
isec->initialized = 1;
}
- if (!ss_initialized || sbsec->behavior == SECURITY_FS_USE_MNTPOINT)
+ if (!ss_initialized || !(sbsec->flags & SE_SBLABELSUPP))
return -EOPNOTSUPP;
if (name) {
static int selinux_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry)
{
- int rc;
-
- rc = secondary_ops->inode_link(old_dentry, dir, new_dentry);
- if (rc)
- return rc;
return may_link(dir, old_dentry, MAY_LINK);
}
static int selinux_inode_unlink(struct inode *dir, struct dentry *dentry)
{
- int rc;
-
- rc = secondary_ops->inode_unlink(dir, dentry);
- if (rc)
- return rc;
return may_link(dir, dentry, MAY_UNLINK);
}
static int selinux_inode_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
{
- int rc;
-
- rc = secondary_ops->inode_mknod(dir, dentry, mode, dev);
- if (rc)
- return rc;
-
return may_create(dir, dentry, inode_mode_to_security_class(mode));
}
static int selinux_inode_readlink(struct dentry *dentry)
{
- return dentry_has_perm(current, NULL, dentry, FILE__READ);
+ const struct cred *cred = current_cred();
+
+ return dentry_has_perm(cred, NULL, dentry, FILE__READ);
}
static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata)
{
- int rc;
+ const struct cred *cred = current_cred();
- rc = secondary_ops->inode_follow_link(dentry, nameidata);
- if (rc)
- return rc;
- return dentry_has_perm(current, NULL, dentry, FILE__READ);
+ return dentry_has_perm(cred, NULL, dentry, FILE__READ);
}
static int selinux_inode_permission(struct inode *inode, int mask)
{
- int rc;
-
- rc = secondary_ops->inode_permission(inode, mask);
- if (rc)
- return rc;
+ const struct cred *cred = current_cred();
if (!mask) {
/* No permission to check. Existence test. */
return 0;
}
- return inode_has_perm(current, inode,
+ return inode_has_perm(cred, inode,
file_mask_to_av(inode->i_mode, mask), NULL);
}
static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
{
- int rc;
-
- rc = secondary_ops->inode_setattr(dentry, iattr);
- if (rc)
- return rc;
+ const struct cred *cred = current_cred();
if (iattr->ia_valid & ATTR_FORCE)
return 0;
if (iattr->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID |
ATTR_ATIME_SET | ATTR_MTIME_SET))
- return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
+ return dentry_has_perm(cred, NULL, dentry, FILE__SETATTR);
- return dentry_has_perm(current, NULL, dentry, FILE__WRITE);
+ return dentry_has_perm(cred, NULL, dentry, FILE__WRITE);
}
static int selinux_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
{
- return dentry_has_perm(current, mnt, dentry, FILE__GETATTR);
+ const struct cred *cred = current_cred();
+
+ return dentry_has_perm(cred, mnt, dentry, FILE__GETATTR);
}
static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
{
+ const struct cred *cred = current_cred();
+
if (!strncmp(name, XATTR_SECURITY_PREFIX,
sizeof XATTR_SECURITY_PREFIX - 1)) {
if (!strcmp(name, XATTR_NAME_CAPS)) {
/* Not an attribute we recognize, so just check the
ordinary setattr permission. */
- return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
+ return dentry_has_perm(cred, NULL, dentry, FILE__SETATTR);
}
static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
return selinux_inode_setotherxattr(dentry, name);
sbsec = inode->i_sb->s_security;
- if (sbsec->behavior == SECURITY_FS_USE_MNTPOINT)
+ if (!(sbsec->flags & SE_SBLABELSUPP))
return -EOPNOTSUPP;
if (!is_owner_or_cap(inode))
static int selinux_inode_getxattr(struct dentry *dentry, const char *name)
{
- return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
+ const struct cred *cred = current_cred();
+
+ return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR);
}
static int selinux_inode_listxattr(struct dentry *dentry)
{
- return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
+ const struct cred *cred = current_cred();
+
+ return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR);
}
static int selinux_inode_removexattr(struct dentry *dentry, const char *name)
* and lack of permission just means that we fall back to the
* in-core context value, not a denial.
*/
- error = selinux_capable(current, CAP_MAC_ADMIN, SECURITY_CAP_NOAUDIT);
+ error = selinux_capable(current, current_cred(), CAP_MAC_ADMIN,
+ SECURITY_CAP_NOAUDIT);
if (!error)
error = security_sid_to_context_force(isec->sid, &context,
&size);
return len;
}
-static int selinux_inode_need_killpriv(struct dentry *dentry)
-{
- return secondary_ops->inode_need_killpriv(dentry);
-}
-
-static int selinux_inode_killpriv(struct dentry *dentry)
-{
- return secondary_ops->inode_killpriv(dentry);
-}
-
static void selinux_inode_getsecid(const struct inode *inode, u32 *secid)
{
struct inode_security_struct *isec = inode->i_security;
static int selinux_revalidate_file_permission(struct file *file, int mask)
{
- int rc;
+ const struct cred *cred = current_cred();
struct inode *inode = file->f_path.dentry->d_inode;
if (!mask) {
if ((file->f_flags & O_APPEND) && (mask & MAY_WRITE))
mask |= MAY_APPEND;
- rc = file_has_perm(current, file,
- file_mask_to_av(inode->i_mode, mask));
- if (rc)
- return rc;
-
- return selinux_netlbl_inode_permission(inode, mask);
+ return file_has_perm(cred, file,
+ file_mask_to_av(inode->i_mode, mask));
}
static int selinux_file_permission(struct file *file, int mask)
{
- struct inode *inode = file->f_path.dentry->d_inode;
- struct file_security_struct *fsec = file->f_security;
- struct inode_security_struct *isec = inode->i_security;
- u32 sid = current_sid();
-
- if (!mask) {
+ if (!mask)
/* No permission to check. Existence test. */
return 0;
- }
-
- if (sid == fsec->sid && fsec->isid == isec->sid
- && fsec->pseqno == avc_policy_seqno())
- return selinux_netlbl_inode_permission(inode, mask);
return selinux_revalidate_file_permission(file, mask);
}
static int selinux_file_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
+ const struct cred *cred = current_cred();
u32 av = 0;
if (_IOC_DIR(cmd) & _IOC_WRITE)
if (!av)
av = FILE__IOCTL;
- return file_has_perm(current, file, av);
+ return file_has_perm(cred, file, av);
}
static int file_map_prot_check(struct file *file, unsigned long prot, int shared)
{
+ const struct cred *cred = current_cred();
+ int rc = 0;
+
#ifndef CONFIG_PPC32
if ((prot & PROT_EXEC) && (!file || (!shared && (prot & PROT_WRITE)))) {
/*
* private file mapping that will also be writable.
* This has an additional check.
*/
- int rc = task_has_perm(current, current, PROCESS__EXECMEM);
+ rc = cred_has_perm(cred, cred, PROCESS__EXECMEM);
if (rc)
- return rc;
+ goto error;
}
#endif
if (prot & PROT_EXEC)
av |= FILE__EXECUTE;
- return file_has_perm(current, file, av);
+ return file_has_perm(cred, file, av);
}
- return 0;
+
+error:
+ return rc;
}
static int selinux_file_mmap(struct file *file, unsigned long reqprot,
unsigned long reqprot,
unsigned long prot)
{
- int rc;
-
- rc = secondary_ops->file_mprotect(vma, reqprot, prot);
- if (rc)
- return rc;
+ const struct cred *cred = current_cred();
if (selinux_checkreqprot)
prot = reqprot;
#ifndef CONFIG_PPC32
if ((prot & PROT_EXEC) && !(vma->vm_flags & VM_EXEC)) {
- rc = 0;
+ int rc = 0;
if (vma->vm_start >= vma->vm_mm->start_brk &&
vma->vm_end <= vma->vm_mm->brk) {
- rc = task_has_perm(current, current,
- PROCESS__EXECHEAP);
+ rc = cred_has_perm(cred, cred, PROCESS__EXECHEAP);
} else if (!vma->vm_file &&
vma->vm_start <= vma->vm_mm->start_stack &&
vma->vm_end >= vma->vm_mm->start_stack) {
- rc = task_has_perm(current, current, PROCESS__EXECSTACK);
+ rc = current_has_perm(current, PROCESS__EXECSTACK);
} else if (vma->vm_file && vma->anon_vma) {
/*
* We are making executable a file mapping that has
* modified content. This typically should only
* occur for text relocations.
*/
- rc = file_has_perm(current, vma->vm_file,
- FILE__EXECMOD);
+ rc = file_has_perm(cred, vma->vm_file, FILE__EXECMOD);
}
if (rc)
return rc;
static int selinux_file_lock(struct file *file, unsigned int cmd)
{
- return file_has_perm(current, file, FILE__LOCK);
+ const struct cred *cred = current_cred();
+
+ return file_has_perm(cred, file, FILE__LOCK);
}
static int selinux_file_fcntl(struct file *file, unsigned int cmd,
unsigned long arg)
{
+ const struct cred *cred = current_cred();
int err = 0;
switch (cmd) {
}
if ((file->f_flags & O_APPEND) && !(arg & O_APPEND)) {
- err = file_has_perm(current, file, FILE__WRITE);
+ err = file_has_perm(cred, file, FILE__WRITE);
break;
}
/* fall through */
case F_GETOWN:
case F_GETSIG:
/* Just check FD__USE permission */
- err = file_has_perm(current, file, 0);
+ err = file_has_perm(cred, file, 0);
break;
case F_GETLK:
case F_SETLK:
err = -EINVAL;
break;
}
- err = file_has_perm(current, file, FILE__LOCK);
+ err = file_has_perm(cred, file, FILE__LOCK);
break;
}
struct fown_struct *fown, int signum)
{
struct file *file;
- u32 sid = current_sid();
+ u32 sid = task_sid(tsk);
u32 perm;
struct file_security_struct *fsec;
static int selinux_file_receive(struct file *file)
{
- return file_has_perm(current, file, file_to_av(file));
+ const struct cred *cred = current_cred();
+
+ return file_has_perm(cred, file, file_to_av(file));
}
-static int selinux_dentry_open(struct file *file)
+static int selinux_dentry_open(struct file *file, const struct cred *cred)
{
struct file_security_struct *fsec;
struct inode *inode;
struct inode_security_struct *isec;
+
inode = file->f_path.dentry->d_inode;
fsec = file->f_security;
isec = inode->i_security;
* new inode label or new policy.
* This check is not redundant - do not remove.
*/
- return inode_has_perm(current, inode, open_file_to_av(file), NULL);
+ return inode_has_perm(cred, inode, open_file_to_av(file), NULL);
}
/* task security operations */
static int selinux_task_create(unsigned long clone_flags)
{
- int rc;
-
- rc = secondary_ops->task_create(clone_flags);
- if (rc)
- return rc;
-
- return task_has_perm(current, current, PROCESS__FORK);
-}
-
-static int selinux_cred_alloc_security(struct cred *cred)
-{
- struct task_security_struct *tsec1, *tsec2;
- int rc;
-
- tsec1 = current_security();
-
- rc = cred_alloc_security(cred);
- if (rc)
- return rc;
- tsec2 = cred->security;
-
- tsec2->osid = tsec1->osid;
- tsec2->sid = tsec1->sid;
-
- /* Retain the exec, fs, key, and sock SIDs across fork */
- tsec2->exec_sid = tsec1->exec_sid;
- tsec2->create_sid = tsec1->create_sid;
- tsec2->keycreate_sid = tsec1->keycreate_sid;
- tsec2->sockcreate_sid = tsec1->sockcreate_sid;
-
- return 0;
+ return current_has_perm(current, PROCESS__FORK);
}
/*
kfree(tsec);
}
-static int selinux_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
+/*
+ * prepare a new set of credentials for modification
+ */
+static int selinux_cred_prepare(struct cred *new, const struct cred *old,
+ gfp_t gfp)
{
- /* Since setuid only affects the current process, and
- since the SELinux controls are not based on the Linux
- identity attributes, SELinux does not need to control
- this operation. However, SELinux does control the use
- of the CAP_SETUID and CAP_SETGID capabilities using the
- capable hook. */
+ const struct task_security_struct *old_tsec;
+ struct task_security_struct *tsec;
+
+ old_tsec = old->security;
+
+ tsec = kmemdup(old_tsec, sizeof(struct task_security_struct), gfp);
+ if (!tsec)
+ return -ENOMEM;
+
+ new->security = tsec;
return 0;
}
-static int selinux_task_post_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
+/*
+ * set the security data for a kernel service
+ * - all the creation contexts are set to unlabelled
+ */
+static int selinux_kernel_act_as(struct cred *new, u32 secid)
{
- return secondary_ops->task_post_setuid(id0, id1, id2, flags);
+ struct task_security_struct *tsec = new->security;
+ u32 sid = current_sid();
+ int ret;
+
+ ret = avc_has_perm(sid, secid,
+ SECCLASS_KERNEL_SERVICE,
+ KERNEL_SERVICE__USE_AS_OVERRIDE,
+ NULL);
+ if (ret == 0) {
+ tsec->sid = secid;
+ tsec->create_sid = 0;
+ tsec->keycreate_sid = 0;
+ tsec->sockcreate_sid = 0;
+ }
+ return ret;
}
-static int selinux_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
+/*
+ * set the file creation context in a security record to the same as the
+ * objective context of the specified inode
+ */
+static int selinux_kernel_create_files_as(struct cred *new, struct inode *inode)
{
- /* See the comment for setuid above. */
+ struct inode_security_struct *isec = inode->i_security;
+ struct task_security_struct *tsec = new->security;
+ u32 sid = current_sid();
+ int ret;
+
+ ret = avc_has_perm(sid, isec->sid,
+ SECCLASS_KERNEL_SERVICE,
+ KERNEL_SERVICE__CREATE_FILES_AS,
+ NULL);
+
+ if (ret == 0)
+ tsec->create_sid = isec->sid;
return 0;
}
static int selinux_task_setpgid(struct task_struct *p, pid_t pgid)
{
- return task_has_perm(current, p, PROCESS__SETPGID);
+ return current_has_perm(p, PROCESS__SETPGID);
}
static int selinux_task_getpgid(struct task_struct *p)
{
- return task_has_perm(current, p, PROCESS__GETPGID);
+ return current_has_perm(p, PROCESS__GETPGID);
}
static int selinux_task_getsid(struct task_struct *p)
{
- return task_has_perm(current, p, PROCESS__GETSESSION);
+ return current_has_perm(p, PROCESS__GETSESSION);
}
static void selinux_task_getsecid(struct task_struct *p, u32 *secid)
*secid = task_sid(p);
}
-static int selinux_task_setgroups(struct group_info *group_info)
-{
- /* See the comment for setuid above. */
- return 0;
-}
-
static int selinux_task_setnice(struct task_struct *p, int nice)
{
int rc;
- rc = secondary_ops->task_setnice(p, nice);
+ rc = cap_task_setnice(p, nice);
if (rc)
return rc;
- return task_has_perm(current, p, PROCESS__SETSCHED);
+ return current_has_perm(p, PROCESS__SETSCHED);
}
static int selinux_task_setioprio(struct task_struct *p, int ioprio)
{
int rc;
- rc = secondary_ops->task_setioprio(p, ioprio);
+ rc = cap_task_setioprio(p, ioprio);
if (rc)
return rc;
- return task_has_perm(current, p, PROCESS__SETSCHED);
+ return current_has_perm(p, PROCESS__SETSCHED);
}
static int selinux_task_getioprio(struct task_struct *p)
{
- return task_has_perm(current, p, PROCESS__GETSCHED);
+ return current_has_perm(p, PROCESS__GETSCHED);
}
static int selinux_task_setrlimit(unsigned int resource, struct rlimit *new_rlim)
{
struct rlimit *old_rlim = current->signal->rlim + resource;
- int rc;
-
- rc = secondary_ops->task_setrlimit(resource, new_rlim);
- if (rc)
- return rc;
/* Control the ability to change the hard limit (whether
lowering or raising it), so that the hard limit can
later be used as a safe reset point for the soft limit
- upon context transitions. See selinux_bprm_apply_creds. */
+ upon context transitions. See selinux_bprm_committing_creds. */
if (old_rlim->rlim_max != new_rlim->rlim_max)
- return task_has_perm(current, current, PROCESS__SETRLIMIT);
+ return current_has_perm(current, PROCESS__SETRLIMIT);
return 0;
}
{
int rc;
- rc = secondary_ops->task_setscheduler(p, policy, lp);
+ rc = cap_task_setscheduler(p, policy, lp);
if (rc)
return rc;
- return task_has_perm(current, p, PROCESS__SETSCHED);
+ return current_has_perm(p, PROCESS__SETSCHED);
}
static int selinux_task_getscheduler(struct task_struct *p)
{
- return task_has_perm(current, p, PROCESS__GETSCHED);
+ return current_has_perm(p, PROCESS__GETSCHED);
}
static int selinux_task_movememory(struct task_struct *p)
{
- return task_has_perm(current, p, PROCESS__SETSCHED);
+ return current_has_perm(p, PROCESS__SETSCHED);
}
static int selinux_task_kill(struct task_struct *p, struct siginfo *info,
u32 perm;
int rc;
- rc = secondary_ops->task_kill(p, info, sig, secid);
- if (rc)
- return rc;
-
if (!sig)
perm = PROCESS__SIGNULL; /* null signal; existence test */
else
rc = avc_has_perm(secid, task_sid(p),
SECCLASS_PROCESS, perm, NULL);
else
- rc = task_has_perm(current, p, perm);
+ rc = current_has_perm(p, perm);
return rc;
}
-static int selinux_task_prctl(int option,
- unsigned long arg2,
- unsigned long arg3,
- unsigned long arg4,
- unsigned long arg5,
- long *rc_p)
-{
- /* The current prctl operations do not appear to require
- any SELinux controls since they merely observe or modify
- the state of the current process. */
- return secondary_ops->task_prctl(option, arg2, arg3, arg4, arg5, rc_p);
-}
-
static int selinux_task_wait(struct task_struct *p)
{
return task_has_perm(p, current, PROCESS__SIGCHLD);
}
-static void selinux_task_reparent_to_init(struct task_struct *p)
-{
- struct task_security_struct *tsec;
-
- secondary_ops->task_reparent_to_init(p);
-
- tsec = p->cred->security;
- tsec->osid = tsec->sid;
- tsec->sid = SECINITSID_KERNEL;
- return;
-}
-
static void selinux_task_to_inode(struct task_struct *p,
struct inode *inode)
{
sksec = sock->sk->sk_security;
sksec->sid = isec->sid;
sksec->sclass = isec->sclass;
- err = selinux_netlbl_socket_post_create(sock);
+ err = selinux_netlbl_socket_post_create(sock->sk, family);
}
return err;
static int selinux_socket_sendmsg(struct socket *sock, struct msghdr *msg,
int size)
{
- int rc;
-
- rc = socket_has_perm(current, sock, SOCKET__WRITE);
- if (rc)
- return rc;
-
- return selinux_netlbl_inode_permission(SOCK_INODE(sock), MAY_WRITE);
+ return socket_has_perm(current, sock, SOCKET__WRITE);
}
static int selinux_socket_recvmsg(struct socket *sock, struct msghdr *msg,
struct avc_audit_data ad;
int err;
- err = secondary_ops->unix_stream_connect(sock, other, newsk);
- if (err)
- return err;
-
isec = SOCK_INODE(sock)->i_security;
other_isec = SOCK_INODE(other)->i_security;
SECCLASS_NODE, NODE__RECVFROM, ad);
}
-static int selinux_sock_rcv_skb_iptables_compat(struct sock *sk,
- struct sk_buff *skb,
- struct avc_audit_data *ad,
- u16 family,
- char *addrp)
-{
- int err;
- struct sk_security_struct *sksec = sk->sk_security;
- u16 sk_class;
- u32 netif_perm, node_perm, recv_perm;
- u32 port_sid, node_sid, if_sid, sk_sid;
-
- sk_sid = sksec->sid;
- sk_class = sksec->sclass;
-
- switch (sk_class) {
- case SECCLASS_UDP_SOCKET:
- netif_perm = NETIF__UDP_RECV;
- node_perm = NODE__UDP_RECV;
- recv_perm = UDP_SOCKET__RECV_MSG;
- break;
- case SECCLASS_TCP_SOCKET:
- netif_perm = NETIF__TCP_RECV;
- node_perm = NODE__TCP_RECV;
- recv_perm = TCP_SOCKET__RECV_MSG;
- break;
- case SECCLASS_DCCP_SOCKET:
- netif_perm = NETIF__DCCP_RECV;
- node_perm = NODE__DCCP_RECV;
- recv_perm = DCCP_SOCKET__RECV_MSG;
- break;
- default:
- netif_perm = NETIF__RAWIP_RECV;
- node_perm = NODE__RAWIP_RECV;
- recv_perm = 0;
- break;
- }
-
- err = sel_netif_sid(skb->iif, &if_sid);
- if (err)
- return err;
- err = avc_has_perm(sk_sid, if_sid, SECCLASS_NETIF, netif_perm, ad);
- if (err)
- return err;
-
- err = sel_netnode_sid(addrp, family, &node_sid);
- if (err)
- return err;
- err = avc_has_perm(sk_sid, node_sid, SECCLASS_NODE, node_perm, ad);
- if (err)
- return err;
-
- if (!recv_perm)
- return 0;
- err = sel_netport_sid(sk->sk_protocol,
- ntohs(ad->u.net.sport), &port_sid);
- if (unlikely(err)) {
- printk(KERN_WARNING
- "SELinux: failure in"
- " selinux_sock_rcv_skb_iptables_compat(),"
- " network port label not found\n");
- return err;
- }
- return avc_has_perm(sk_sid, port_sid, sk_class, recv_perm, ad);
-}
-
static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
u16 family)
{
- int err;
+ int err = 0;
struct sk_security_struct *sksec = sk->sk_security;
u32 peer_sid;
u32 sk_sid = sksec->sid;
if (err)
return err;
- if (selinux_compat_net)
- err = selinux_sock_rcv_skb_iptables_compat(sk, skb, &ad,
- family, addrp);
- else
+ if (selinux_secmark_enabled()) {
err = avc_has_perm(sk_sid, skb->secmark, SECCLASS_PACKET,
PACKET__RECV, &ad);
- if (err)
- return err;
+ if (err)
+ return err;
+ }
if (selinux_policycap_netpeer) {
err = selinux_skb_peerlbl_sid(skb, family, &peer_sid);
* to the selinux_sock_rcv_skb_compat() function to deal with the
* special handling. We do this in an attempt to keep this function
* as fast and as clean as possible. */
- if (selinux_compat_net || !selinux_policycap_netpeer)
+ if (!selinux_policycap_netpeer)
return selinux_sock_rcv_skb_compat(sk, skb, family);
secmark_active = selinux_secmark_enabled();
newssec->peer_sid = ssec->peer_sid;
newssec->sclass = ssec->sclass;
- selinux_netlbl_sk_security_reset(newssec, newsk->sk_family);
+ selinux_netlbl_sk_security_reset(newssec);
}
static void selinux_sk_getsecid(struct sock *sk, u32 *secid)
if (peersid == SECSID_NULL) {
req->secid = sksec->sid;
req->peer_secid = SECSID_NULL;
- return 0;
+ } else {
+ err = security_sid_mls_copy(sksec->sid, peersid, &newsid);
+ if (err)
+ return err;
+ req->secid = newsid;
+ req->peer_secid = peersid;
}
- err = security_sid_mls_copy(sksec->sid, peersid, &newsid);
- if (err)
- return err;
-
- req->secid = newsid;
- req->peer_secid = peersid;
- return 0;
+ return selinux_netlbl_inet_conn_request(req, family);
}
static void selinux_inet_csk_clone(struct sock *newsk,
/* We don't need to take any sort of lock here as we are the only
* thread with access to newsksec */
- selinux_netlbl_sk_security_reset(newsksec, req->rsk_ops->family);
+ selinux_netlbl_inet_csk_clone(newsk, req->rsk_ops->family);
}
static void selinux_inet_conn_established(struct sock *sk, struct sk_buff *skb)
family = PF_INET;
selinux_skb_peerlbl_sid(skb, family, &sksec->peer_sid);
-
- selinux_netlbl_inet_conn_established(sk, family);
}
static void selinux_req_classify_flow(const struct request_sock *req,
return selinux_ip_output(skb, PF_INET);
}
-static int selinux_ip_postroute_iptables_compat(struct sock *sk,
- int ifindex,
- struct avc_audit_data *ad,
- u16 family, char *addrp)
-{
- int err;
- struct sk_security_struct *sksec = sk->sk_security;
- u16 sk_class;
- u32 netif_perm, node_perm, send_perm;
- u32 port_sid, node_sid, if_sid, sk_sid;
-
- sk_sid = sksec->sid;
- sk_class = sksec->sclass;
-
- switch (sk_class) {
- case SECCLASS_UDP_SOCKET:
- netif_perm = NETIF__UDP_SEND;
- node_perm = NODE__UDP_SEND;
- send_perm = UDP_SOCKET__SEND_MSG;
- break;
- case SECCLASS_TCP_SOCKET:
- netif_perm = NETIF__TCP_SEND;
- node_perm = NODE__TCP_SEND;
- send_perm = TCP_SOCKET__SEND_MSG;
- break;
- case SECCLASS_DCCP_SOCKET:
- netif_perm = NETIF__DCCP_SEND;
- node_perm = NODE__DCCP_SEND;
- send_perm = DCCP_SOCKET__SEND_MSG;
- break;
- default:
- netif_perm = NETIF__RAWIP_SEND;
- node_perm = NODE__RAWIP_SEND;
- send_perm = 0;
- break;
- }
-
- err = sel_netif_sid(ifindex, &if_sid);
- if (err)
- return err;
- err = avc_has_perm(sk_sid, if_sid, SECCLASS_NETIF, netif_perm, ad);
- return err;
-
- err = sel_netnode_sid(addrp, family, &node_sid);
- if (err)
- return err;
- err = avc_has_perm(sk_sid, node_sid, SECCLASS_NODE, node_perm, ad);
- if (err)
- return err;
-
- if (send_perm != 0)
- return 0;
-
- err = sel_netport_sid(sk->sk_protocol,
- ntohs(ad->u.net.dport), &port_sid);
- if (unlikely(err)) {
- printk(KERN_WARNING
- "SELinux: failure in"
- " selinux_ip_postroute_iptables_compat(),"
- " network port label not found\n");
- return err;
- }
- return avc_has_perm(sk_sid, port_sid, sk_class, send_perm, ad);
-}
-
static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
int ifindex,
u16 family)
if (selinux_parse_skb(skb, &ad, &addrp, 0, &proto))
return NF_DROP;
- if (selinux_compat_net) {
- if (selinux_ip_postroute_iptables_compat(skb->sk, ifindex,
- &ad, family, addrp))
- return NF_DROP;
- } else {
+ if (selinux_secmark_enabled())
if (avc_has_perm(sksec->sid, skb->secmark,
SECCLASS_PACKET, PACKET__SEND, &ad))
return NF_DROP;
- }
if (selinux_policycap_netpeer)
if (selinux_xfrm_postroute_last(sksec->sid, skb, &ad, proto))
* to the selinux_ip_postroute_compat() function to deal with the
* special handling. We do this in an attempt to keep this function
* as fast and as clean as possible. */
- if (selinux_compat_net || !selinux_policycap_netpeer)
+ if (!selinux_policycap_netpeer)
return selinux_ip_postroute_compat(skb, ifindex, family);
-
+#ifdef CONFIG_XFRM
/* If skb->dst->xfrm is non-NULL then the packet is undergoing an IPsec
* packet transformation so allow the packet to pass without any checks
* since we'll have another chance to perform access control checks
* when the packet is on it's final way out.
* NOTE: there appear to be some IPv6 multicast cases where skb->dst
* is NULL, in this case go ahead and apply access control. */
- if (skb->dst != NULL && skb->dst->xfrm != NULL)
+ if (skb_dst(skb) != NULL && skb_dst(skb)->xfrm != NULL)
return NF_ACCEPT;
-
+#endif
secmark_active = selinux_secmark_enabled();
peerlbl_active = netlbl_enabled() || selinux_xfrm_enabled();
if (!secmark_active && !peerlbl_active)
{
int err;
- err = secondary_ops->netlink_send(sk, skb);
+ err = cap_netlink_send(sk, skb);
if (err)
return err;
int err;
struct avc_audit_data ad;
- err = secondary_ops->netlink_recv(skb, capability);
+ err = cap_netlink_recv(skb, capability);
if (err)
return err;
char __user *shmaddr, int shmflg)
{
u32 perms;
- int rc;
-
- rc = secondary_ops->shm_shmat(shp, shmaddr, shmflg);
- if (rc)
- return rc;
if (shmflg & SHM_RDONLY)
perms = SHM__READ;
unsigned len;
if (current != p) {
- error = task_has_perm(current, p, PROCESS__GETATTR);
+ error = current_has_perm(p, PROCESS__GETATTR);
if (error)
return error;
}
{
struct task_security_struct *tsec;
struct task_struct *tracer;
- u32 sid = 0;
+ struct cred *new;
+ u32 sid = 0, ptsid;
int error;
char *str = value;
* above restriction is ever removed.
*/
if (!strcmp(name, "exec"))
- error = task_has_perm(current, p, PROCESS__SETEXEC);
+ error = current_has_perm(p, PROCESS__SETEXEC);
else if (!strcmp(name, "fscreate"))
- error = task_has_perm(current, p, PROCESS__SETFSCREATE);
+ error = current_has_perm(p, PROCESS__SETFSCREATE);
else if (!strcmp(name, "keycreate"))
- error = task_has_perm(current, p, PROCESS__SETKEYCREATE);
+ error = current_has_perm(p, PROCESS__SETKEYCREATE);
else if (!strcmp(name, "sockcreate"))
- error = task_has_perm(current, p, PROCESS__SETSOCKCREATE);
+ error = current_has_perm(p, PROCESS__SETSOCKCREATE);
else if (!strcmp(name, "current"))
- error = task_has_perm(current, p, PROCESS__SETCURRENT);
+ error = current_has_perm(p, PROCESS__SETCURRENT);
else
error = -EINVAL;
if (error)
return error;
}
+ new = prepare_creds();
+ if (!new)
+ return -ENOMEM;
+
/* Permission checking based on the specified context is
performed during the actual operation (execve,
open/mkdir/...), when we know the full context of the
- operation. See selinux_bprm_set_security for the execve
+ operation. See selinux_bprm_set_creds for the execve
checks and may_create for the file creation checks. The
operation will then fail if the context is not permitted. */
- tsec = p->cred->security;
- if (!strcmp(name, "exec"))
+ tsec = new->security;
+ if (!strcmp(name, "exec")) {
tsec->exec_sid = sid;
- else if (!strcmp(name, "fscreate"))
+ } else if (!strcmp(name, "fscreate")) {
tsec->create_sid = sid;
- else if (!strcmp(name, "keycreate")) {
+ } else if (!strcmp(name, "keycreate")) {
error = may_create_key(sid, p);
if (error)
- return error;
+ goto abort_change;
tsec->keycreate_sid = sid;
- } else if (!strcmp(name, "sockcreate"))
+ } else if (!strcmp(name, "sockcreate")) {
tsec->sockcreate_sid = sid;
- else if (!strcmp(name, "current")) {
- struct av_decision avd;
-
+ } else if (!strcmp(name, "current")) {
+ error = -EINVAL;
if (sid == 0)
- return -EINVAL;
- /*
- * SELinux allows to change context in the following case only.
- * - Single threaded processes.
- * - Multi threaded processes intend to change its context into
- * more restricted domain (defined by TYPEBOUNDS statement).
- */
- if (atomic_read(&p->mm->mm_users) != 1) {
- struct task_struct *g, *t;
- struct mm_struct *mm = p->mm;
- read_lock(&tasklist_lock);
- do_each_thread(g, t) {
- if (t->mm == mm && t != p) {
- read_unlock(&tasklist_lock);
- error = security_bounded_transition(tsec->sid, sid);
- if (!error)
- goto boundary_ok;
-
- return error;
- }
- } while_each_thread(g, t);
- read_unlock(&tasklist_lock);
+ goto abort_change;
+
+ /* Only allow single threaded processes to change context */
+ error = -EPERM;
+ if (!is_single_threaded(p)) {
+ error = security_bounded_transition(tsec->sid, sid);
+ if (error)
+ goto abort_change;
}
-boundary_ok:
/* Check permissions for the transition. */
error = avc_has_perm(tsec->sid, sid, SECCLASS_PROCESS,
PROCESS__DYNTRANSITION, NULL);
if (error)
- return error;
+ goto abort_change;
/* Check for ptracing, and update the task SID if ok.
Otherwise, leave SID unchanged and fail. */
+ ptsid = 0;
task_lock(p);
- rcu_read_lock();
tracer = tracehook_tracer_task(p);
- if (tracer != NULL) {
- u32 ptsid = task_sid(tracer);
- rcu_read_unlock();
- error = avc_has_perm_noaudit(ptsid, sid,
- SECCLASS_PROCESS,
- PROCESS__PTRACE, 0, &avd);
- if (!error)
- tsec->sid = sid;
- task_unlock(p);
- avc_audit(ptsid, sid, SECCLASS_PROCESS,
- PROCESS__PTRACE, &avd, error, NULL);
+ if (tracer)
+ ptsid = task_sid(tracer);
+ task_unlock(p);
+
+ if (tracer) {
+ error = avc_has_perm(ptsid, sid, SECCLASS_PROCESS,
+ PROCESS__PTRACE, NULL);
if (error)
- return error;
- } else {
- rcu_read_unlock();
- tsec->sid = sid;
- task_unlock(p);
+ goto abort_change;
}
- } else
- return -EINVAL;
+ tsec->sid = sid;
+ } else {
+ error = -EINVAL;
+ goto abort_change;
+ }
+
+ commit_creds(new);
return size;
+
+abort_change:
+ abort_creds(new);
+ return error;
}
static int selinux_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
#ifdef CONFIG_KEYS
-static int selinux_key_alloc(struct key *k, struct task_struct *tsk,
+static int selinux_key_alloc(struct key *k, const struct cred *cred,
unsigned long flags)
{
- const struct task_security_struct *__tsec;
+ const struct task_security_struct *tsec;
struct key_security_struct *ksec;
ksec = kzalloc(sizeof(struct key_security_struct), GFP_KERNEL);
if (!ksec)
return -ENOMEM;
- rcu_read_lock();
- __tsec = __task_cred(tsk)->security;
- if (__tsec->keycreate_sid)
- ksec->sid = __tsec->keycreate_sid;
+ tsec = cred->security;
+ if (tsec->keycreate_sid)
+ ksec->sid = tsec->keycreate_sid;
else
- ksec->sid = __tsec->sid;
- rcu_read_unlock();
+ ksec->sid = tsec->sid;
k->security = ksec;
return 0;
}
static int selinux_key_permission(key_ref_t key_ref,
- struct task_struct *ctx,
- key_perm_t perm)
+ const struct cred *cred,
+ key_perm_t perm)
{
struct key *key;
struct key_security_struct *ksec;
if (perm == 0)
return 0;
- sid = task_sid(ctx);
+ sid = cred_sid(cred);
key = key_ref_to_ptr(key_ref);
ksec = key->security;
.ptrace_may_access = selinux_ptrace_may_access,
.ptrace_traceme = selinux_ptrace_traceme,
.capget = selinux_capget,
- .capset_check = selinux_capset_check,
- .capset_set = selinux_capset_set,
+ .capset = selinux_capset,
.sysctl = selinux_sysctl,
.capable = selinux_capable,
.quotactl = selinux_quotactl,
.netlink_send = selinux_netlink_send,
.netlink_recv = selinux_netlink_recv,
- .bprm_alloc_security = selinux_bprm_alloc_security,
- .bprm_free_security = selinux_bprm_free_security,
- .bprm_apply_creds = selinux_bprm_apply_creds,
- .bprm_post_apply_creds = selinux_bprm_post_apply_creds,
- .bprm_set_security = selinux_bprm_set_security,
- .bprm_check_security = selinux_bprm_check_security,
+ .bprm_set_creds = selinux_bprm_set_creds,
+ .bprm_committing_creds = selinux_bprm_committing_creds,
+ .bprm_committed_creds = selinux_bprm_committed_creds,
.bprm_secureexec = selinux_bprm_secureexec,
.sb_alloc_security = selinux_sb_alloc_security,
.inode_getsecurity = selinux_inode_getsecurity,
.inode_setsecurity = selinux_inode_setsecurity,
.inode_listsecurity = selinux_inode_listsecurity,
- .inode_need_killpriv = selinux_inode_need_killpriv,
- .inode_killpriv = selinux_inode_killpriv,
.inode_getsecid = selinux_inode_getsecid,
.file_permission = selinux_file_permission,
.dentry_open = selinux_dentry_open,
.task_create = selinux_task_create,
- .cred_alloc_security = selinux_cred_alloc_security,
.cred_free = selinux_cred_free,
- .task_setuid = selinux_task_setuid,
- .task_post_setuid = selinux_task_post_setuid,
- .task_setgid = selinux_task_setgid,
+ .cred_prepare = selinux_cred_prepare,
+ .kernel_act_as = selinux_kernel_act_as,
+ .kernel_create_files_as = selinux_kernel_create_files_as,
.task_setpgid = selinux_task_setpgid,
.task_getpgid = selinux_task_getpgid,
.task_getsid = selinux_task_getsid,
.task_getsecid = selinux_task_getsecid,
- .task_setgroups = selinux_task_setgroups,
.task_setnice = selinux_task_setnice,
.task_setioprio = selinux_task_setioprio,
.task_getioprio = selinux_task_getioprio,
.task_movememory = selinux_task_movememory,
.task_kill = selinux_task_kill,
.task_wait = selinux_task_wait,
- .task_prctl = selinux_task_prctl,
- .task_reparent_to_init = selinux_task_reparent_to_init,
.task_to_inode = selinux_task_to_inode,
.ipc_permission = selinux_ipc_permission,
static __init int selinux_init(void)
{
- struct task_security_struct *tsec;
-
if (!security_module_enable(&selinux_ops)) {
selinux_enabled = 0;
return 0;
printk(KERN_INFO "SELinux: Initializing.\n");
/* Set the security state for the initial task. */
- if (cred_alloc_security(current->cred))
- panic("SELinux: Failed to initialize initial task.\n");
- tsec = current->cred->security;
- tsec->osid = tsec->sid = SECINITSID_KERNEL;
+ cred_init_security();
sel_inode_cache = kmem_cache_create("selinux_inode_security",
sizeof(struct inode_security_struct),
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff