* This file contains the SELinux hook function implementations.
*
* Authors: Stephen Smalley, <sds@epoch.ncsc.mil>
- * Chris Vance, <cvance@nai.com>
- * Wayne Salamon, <wsalamon@nai.com>
- * James Morris <jmorris@redhat.com>
+ * Chris Vance, <cvance@nai.com>
+ * Wayne Salamon, <wsalamon@nai.com>
+ * James Morris <jmorris@redhat.com>
*
* Copyright (C) 2001,2002 Networks Associates Technology, Inc.
* Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
* Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
- * <dgoeddel@trustedcs.com>
+ * <dgoeddel@trustedcs.com>
* Copyright (C) 2006, 2007 Hewlett-Packard Development Company, L.P.
- *
Paul Moore <paul.moore@hp.com>
+ * Paul Moore <paul.moore@hp.com>
* Copyright (C) 2007 Hitachi Software Engineering Co., Ltd.
- * Yuichi Nakamura <ynakam@hitachisoft.jp>
+ * Yuichi Nakamura <ynakam@hitachisoft.jp>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2,
- * as published by the Free Software Foundation.
+ * as published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/syscalls.h>
#include <linux/file.h>
+#include <linux/fdtable.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/ext2_fs.h>
#include <net/tcp.h> /* struct or_callable used in sock_rcv_skb */
#include <net/net_namespace.h>
#include <net/netlabel.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <asm/ioctls.h>
#include <asm/atomic.h>
#include <linux/bitops.h>
#include "objsec.h"
#include "netif.h"
#include "netnode.h"
+#include "netport.h"
#include "xfrm.h"
#include "netlabel.h"
+#include "audit.h"
#define XATTR_SELINUX_SUFFIX "selinux"
#define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
atomic_t selinux_secmark_refcount = ATOMIC_INIT(0);
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
-int selinux_enforcing = 0;
+int selinux_enforcing;
static int __init enforcing_setup(char *str)
{
- selinux_enforcing = simple_strtol(str,NULL,0);
+ unsigned long enforcing;
+ if (!strict_strtoul(str, 0, &enforcing))
+ selinux_enforcing = enforcing ? 1 : 0;
return 1;
}
__setup("enforcing=", enforcing_setup);
static int __init selinux_enabled_setup(char *str)
{
- selinux_enabled = simple_strtol(str, NULL, 0);
+ unsigned long enabled;
+ if (!strict_strtoul(str, 0, &enabled))
+ selinux_enabled = enabled ? 1 : 0;
return 1;
}
__setup("selinux=", selinux_enabled_setup);
#endif
/* Original (dummy) security module. */
-static struct security_operations *original_ops = NULL;
+static struct security_operations *original_ops;
/* Minimal support for a secondary security module,
just to allow the use of the dummy or capability modules.
The owlsm module can alternatively be used as a secondary
module as long as CONFIG_OWLSM_FD is not enabled. */
-static struct security_operations *secondary_ops = NULL;
+static struct security_operations *secondary_ops;
/* Lists of inode and superblock security structures initialized
before the policy was loaded. */
if (!tsec)
return -ENOMEM;
- tsec->task = task;
- tsec->osid = tsec->sid = tsec->ptrace_sid = SECINITSID_UNLABELED;
+ tsec->osid = tsec->sid = SECINITSID_UNLABELED;
task->security = tsec;
return 0;
struct task_security_struct *tsec = current->security;
struct inode_security_struct *isec;
- isec = kmem_cache_zalloc(sel_inode_cache, GFP_KERNEL);
+ isec = kmem_cache_zalloc(sel_inode_cache, GFP_NOFS);
if (!isec)
return -ENOMEM;
if (!fsec)
return -ENOMEM;
- fsec->file = file;
fsec->sid = tsec->sid;
fsec->fown_sid = tsec->sid;
file->f_security = fsec;
if (!ssec)
return -ENOMEM;
- ssec->sk = sk;
ssec->peer_sid = SECINITSID_UNLABELED;
ssec->sid = SECINITSID_UNLABELED;
sk->sk_security = ssec;
- selinux_netlbl_sk_security_init(ssec, family);
+ selinux_netlbl_sk_security_reset(ssec, family);
return 0;
}
};
static match_table_t tokens = {
- {Opt_context, "context=%s"},
- {Opt_fscontext, "fscontext=%s"},
- {Opt_defcontext, "defcontext=%s"},
- {Opt_rootcontext, "rootcontext=%s"},
+ {Opt_context, CONTEXT_STR "%s"},
+ {Opt_fscontext, FSCONTEXT_STR "%s"},
+ {Opt_defcontext, DEFCONTEXT_STR "%s"},
+ {Opt_rootcontext, ROOTCONTEXT_STR "%s"},
{Opt_error, NULL},
};
* mount options, or whatever.
*/
static int selinux_get_mnt_opts(const struct super_block *sb,
- char ***mount_options, int **mnt_opts_flags,
- int *num_opts)
+ struct security_mnt_opts *opts)
{
int rc = 0, i;
struct superblock_security_struct *sbsec = sb->s_security;
u32 len;
char tmp;
- *num_opts = 0;
- *mount_options = NULL;
- *mnt_opts_flags = NULL;
+ security_init_mnt_opts(opts);
if (!sbsec->initialized)
return -EINVAL;
/* count the number of mount options for this sb */
for (i = 0; i < 8; i++) {
if (tmp & 0x01)
- (*num_opts)++;
+ opts->num_mnt_opts++;
tmp >>= 1;
}
- *mount_options = kcalloc(*num_opts, sizeof(char *), GFP_ATOMIC);
- if (!*mount_options) {
+ opts->mnt_opts = kcalloc(opts->num_mnt_opts, sizeof(char *), GFP_ATOMIC);
+ if (!opts->mnt_opts) {
rc = -ENOMEM;
goto out_free;
}
- *mnt_opts_flags = kcalloc(*num_opts, sizeof(int), GFP_ATOMIC);
- if (!*mnt_opts_flags) {
+ opts->mnt_opts_flags = kcalloc(opts->num_mnt_opts, sizeof(int), GFP_ATOMIC);
+ if (!opts->mnt_opts_flags) {
rc = -ENOMEM;
goto out_free;
}
rc = security_sid_to_context(sbsec->sid, &context, &len);
if (rc)
goto out_free;
- (*mount_options)[i] = context;
- (*mnt_opts_flags)[i++] = FSCONTEXT_MNT;
+ opts->mnt_opts[i] = context;
+ opts->mnt_opts_flags[i++] = FSCONTEXT_MNT;
}
if (sbsec->flags & CONTEXT_MNT) {
rc = security_sid_to_context(sbsec->mntpoint_sid, &context, &len);
if (rc)
goto out_free;
- (*mount_options)[i] = context;
- (*mnt_opts_flags)[i++] = CONTEXT_MNT;
+ opts->mnt_opts[i] = context;
+ opts->mnt_opts_flags[i++] = CONTEXT_MNT;
}
if (sbsec->flags & DEFCONTEXT_MNT) {
rc = security_sid_to_context(sbsec->def_sid, &context, &len);
if (rc)
goto out_free;
- (*mount_options)[i] = context;
- (*mnt_opts_flags)[i++] = DEFCONTEXT_MNT;
+ opts->mnt_opts[i] = context;
+ opts->mnt_opts_flags[i++] = DEFCONTEXT_MNT;
}
if (sbsec->flags & ROOTCONTEXT_MNT) {
struct inode *root = sbsec->sb->s_root->d_inode;
rc = security_sid_to_context(isec->sid, &context, &len);
if (rc)
goto out_free;
- (*mount_options)[i] = context;
- (*mnt_opts_flags)[i++] = ROOTCONTEXT_MNT;
+ opts->mnt_opts[i] = context;
+ opts->mnt_opts_flags[i++] = ROOTCONTEXT_MNT;
}
- BUG_ON(i != *num_opts);
+ BUG_ON(i != opts->num_mnt_opts);
return 0;
out_free:
- /* don't leak context string if security_sid_to_context had an error */
- if (*mount_options && i)
- for (; i > 0; i--)
- kfree((*mount_options)[i-1]);
- kfree(*mount_options);
- *mount_options = NULL;
- kfree(*mnt_opts_flags);
- *mnt_opts_flags = NULL;
- *num_opts = 0;
+ security_free_mnt_opts(opts);
return rc;
}
return 1;
return 0;
}
+
/*
* Allow filesystems with binary mount data to explicitly set mount point
* labeling information.
*/
-static int selinux_set_mnt_opts(struct super_block *sb, char **mount_options,
- int *flags, int num_opts)
+static int selinux_set_mnt_opts(struct super_block *sb,
+ struct security_mnt_opts *opts)
{
int rc = 0, i;
struct task_security_struct *tsec = current->security;
struct inode_security_struct *root_isec = inode->i_security;
u32 fscontext_sid = 0, context_sid = 0, rootcontext_sid = 0;
u32 defcontext_sid = 0;
+ char **mount_options = opts->mnt_opts;
+ int *flags = opts->mnt_opts_flags;
+ int num_opts = opts->num_mnt_opts;
mutex_lock(&sbsec->lock);
goto out;
}
rc = -EINVAL;
- printk(KERN_WARNING "Unable to set superblock options before "
- "the security server is initialized\n");
+ printk(KERN_WARNING "SELinux: Unable to set superblock options "
+ "before the security server is initialized\n");
goto out;
}
/*
+ * Binary mount data FS will come through this function twice. Once
+ * from an explicit call and once from the generic calls from the vfs.
+ * Since the generic VFS calls will not contain any security mount data
+ * we need to skip the double mount verification.
+ *
+ * This does open a hole in which we will not notice if the first
+ * mount using this sb set explict options and a second mount using
+ * 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)
+ && (num_opts == 0))
+ goto out;
+
+ /*
* parse the mount options, check if they are valid sids.
* also check if someone is trying to mount the same sb more
* than once with different security options.
rc = security_fs_use(sb->s_type->name, &sbsec->behavior, &sbsec->sid);
if (rc) {
printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n",
- __FUNCTION__, sb->s_type->name, rc);
+ __func__, sb->s_type->name, rc);
goto out;
}
int set_context = (oldsbsec->flags & CONTEXT_MNT);
int set_rootcontext = (oldsbsec->flags & ROOTCONTEXT_MNT);
- /* we can't error, we can't save the info, this shouldn't get called
- * this early in the boot process. */
- BUG_ON(!ss_initialized);
-
- /* this might go away sometime down the line if there is a new user
- * of clone, but for now, nfs better not get here... */
- BUG_ON(newsbsec->initialized);
+ /*
+ * if the parent was able to be mounted it clearly had no special lsm
+ * mount options. thus we can safely put this sb on the list and deal
+ * with it later
+ */
+ if (!ss_initialized) {
+ spin_lock(&sb_security_lock);
+ if (list_empty(&newsbsec->list))
+ list_add(&newsbsec->list, &superblock_security_head);
+ spin_unlock(&sb_security_lock);
+ return;
+ }
/* how can we clone if the old one wasn't set up?? */
BUG_ON(!oldsbsec->initialized);
+ /* if fs is reusing a sb, just let its options stand... */
+ if (newsbsec->initialized)
+ return;
+
mutex_lock(&newsbsec->lock);
newsbsec->flags = oldsbsec->flags;
mutex_unlock(&newsbsec->lock);
}
-/*
- * string mount options parsing and call set the sbsec
- */
-static int superblock_doinit(struct super_block *sb, void *data)
+static int selinux_parse_opts_str(char *options,
+ struct security_mnt_opts *opts)
{
+ char *p;
char *context = NULL, *defcontext = NULL;
char *fscontext = NULL, *rootcontext = NULL;
- int rc = 0;
- char *p, *options = data;
- /* selinux only know about a fixed number of mount options */
- char *mnt_opts[NUM_SEL_MNT_OPTS];
- int mnt_opts_flags[NUM_SEL_MNT_OPTS], num_mnt_opts = 0;
-
- if (!data)
- goto out;
+ int rc, num_mnt_opts = 0;
- /* with the nfs patch this will become a goto out; */
- if (sb->s_type->fs_flags & FS_BINARY_MOUNTDATA) {
- const char *name = sb->s_type->name;
- /* NFS we understand. */
- if (!strcmp(name, "nfs")) {
- struct nfs_mount_data *d = data;
-
- if (d->version != NFS_MOUNT_VERSION)
- goto out;
-
- if (d->context[0]) {
- context = kstrdup(d->context, GFP_KERNEL);
- if (!context) {
- rc = -ENOMEM;
- goto out;
- }
- }
- goto build_flags;
- } else
- goto out;
- }
+ opts->num_mnt_opts = 0;
/* Standard string-based options. */
while ((p = strsep(&options, "|")) != NULL) {
}
}
-build_flags:
+ rc = -ENOMEM;
+ opts->mnt_opts = kcalloc(NUM_SEL_MNT_OPTS, sizeof(char *), GFP_ATOMIC);
+ if (!opts->mnt_opts)
+ goto out_err;
+
+ opts->mnt_opts_flags = kcalloc(NUM_SEL_MNT_OPTS, sizeof(int), GFP_ATOMIC);
+ if (!opts->mnt_opts_flags) {
+ kfree(opts->mnt_opts);
+ goto out_err;
+ }
+
if (fscontext) {
- mnt_opts[num_mnt_opts] = fscontext;
- mnt_opts_flags[num_mnt_opts++] = FSCONTEXT_MNT;
+ opts->mnt_opts[num_mnt_opts] = fscontext;
+ opts->mnt_opts_flags[num_mnt_opts++] = FSCONTEXT_MNT;
}
if (context) {
- mnt_opts[num_mnt_opts] = context;
- mnt_opts_flags[num_mnt_opts++] = CONTEXT_MNT;
+ opts->mnt_opts[num_mnt_opts] = context;
+ opts->mnt_opts_flags[num_mnt_opts++] = CONTEXT_MNT;
}
if (rootcontext) {
- mnt_opts[num_mnt_opts] = rootcontext;
- mnt_opts_flags[num_mnt_opts++] = ROOTCONTEXT_MNT;
+ opts->mnt_opts[num_mnt_opts] = rootcontext;
+ opts->mnt_opts_flags[num_mnt_opts++] = ROOTCONTEXT_MNT;
}
if (defcontext) {
- mnt_opts[num_mnt_opts] = defcontext;
- mnt_opts_flags[num_mnt_opts++] = DEFCONTEXT_MNT;
+ opts->mnt_opts[num_mnt_opts] = defcontext;
+ opts->mnt_opts_flags[num_mnt_opts++] = DEFCONTEXT_MNT;
}
-out:
- rc = selinux_set_mnt_opts(sb, mnt_opts, mnt_opts_flags, num_mnt_opts);
+ opts->num_mnt_opts = num_mnt_opts;
+ return 0;
+
out_err:
kfree(context);
kfree(defcontext);
kfree(rootcontext);
return rc;
}
+/*
+ * string mount options parsing and call set the sbsec
+ */
+static int superblock_doinit(struct super_block *sb, void *data)
+{
+ int rc = 0;
+ char *options = data;
+ struct security_mnt_opts opts;
+
+ security_init_mnt_opts(&opts);
+
+ if (!data)
+ goto out;
+
+ BUG_ON(sb->s_type->fs_flags & FS_BINARY_MOUNTDATA);
+
+ rc = selinux_parse_opts_str(options, &opts);
+ if (rc)
+ goto out_err;
+
+out:
+ rc = selinux_set_mnt_opts(sb, &opts);
+
+out_err:
+ security_free_mnt_opts(&opts);
+ return rc;
+}
static inline u16 inode_mode_to_security_class(umode_t mode)
{
int buflen, rc;
char *buffer, *path, *end;
- buffer = (char*)__get_free_page(GFP_KERNEL);
+ buffer = (char *)__get_free_page(GFP_KERNEL);
if (!buffer)
return -ENOMEM;
dentry = d_find_alias(inode);
}
if (!dentry) {
- printk(KERN_WARNING "%s: no dentry for dev=%s "
- "ino=%ld\n", __FUNCTION__, inode->i_sb->s_id,
+ printk(KERN_WARNING "SELinux: %s: no dentry for dev=%s "
+ "ino=%ld\n", __func__, inode->i_sb->s_id,
inode->i_ino);
goto out_unlock;
}
len = INITCONTEXTLEN;
- context = kmalloc(len, GFP_KERNEL);
+ context = kmalloc(len, GFP_NOFS);
if (!context) {
rc = -ENOMEM;
dput(dentry);
}
kfree(context);
len = rc;
- context = kmalloc(len, GFP_KERNEL);
+ context = kmalloc(len, GFP_NOFS);
if (!context) {
rc = -ENOMEM;
dput(dentry);
dput(dentry);
if (rc < 0) {
if (rc != -ENODATA) {
- printk(KERN_WARNING "%s: getxattr returned "
- "%d for dev=%s ino=%ld\n", __FUNCTION__,
+ printk(KERN_WARNING "SELinux: %s: getxattr returned "
+ "%d for dev=%s ino=%ld\n", __func__,
-rc, inode->i_sb->s_id, inode->i_ino);
kfree(context);
goto out_unlock;
rc = 0;
} else {
rc = security_context_to_sid_default(context, rc, &sid,
- sbsec->def_sid);
+ sbsec->def_sid,
+ GFP_NOFS);
if (rc) {
- printk(KERN_WARNING "%s: context_to_sid(%s) "
+ printk(KERN_WARNING "SELinux: %s: context_to_sid(%s) "
"returned %d for dev=%s ino=%ld\n",
- __FUNCTION__, context, -rc,
+ __func__, context, -rc,
inode->i_sb->s_id, inode->i_ino);
kfree(context);
/* Leave with the unlabeled SID */
tsec = tsk->security;
- AVC_AUDIT_DATA_INIT(&ad,CAP);
+ AVC_AUDIT_DATA_INIT(&ad, CAP);
ad.tsk = tsk;
ad.u.cap = cap;
struct inode_security_struct *isec;
struct avc_audit_data ad;
- if (unlikely (IS_PRIVATE (inode)))
+ if (unlikely(IS_PRIVATE(inode)))
return 0;
tsec = tsk->security;
{
struct inode *inode = dentry->d_inode;
struct avc_audit_data ad;
- AVC_AUDIT_DATA_INIT(&ad,FS);
+ 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 avc_has_perm(tsec->sid, ksid, SECCLASS_KEY, KEY__CREATE, NULL);
}
-#define MAY_LINK 0
-#define MAY_UNLINK 1
-#define MAY_RMDIR 2
+#define MAY_LINK 0
+#define MAY_UNLINK 1
+#define MAY_RMDIR 2
/* Check whether a task can link, unlink, or rmdir a file/directory. */
static int may_link(struct inode *dir,
av = DIR__RMDIR;
break;
default:
- printk(KERN_WARNING "may_link: unrecognized kind %d\n", kind);
+ printk(KERN_WARNING "SELinux: %s: unrecognized kind %d\n",
+ __func__, kind);
return 0;
}
return av;
}
+/*
+ * Convert a file mask to an access vector and include the correct open
+ * open permission.
+ */
+static inline u32 open_file_mask_to_av(int mode, int mask)
+{
+ u32 av = file_mask_to_av(mode, mask);
+
+ if (selinux_policycap_openperm) {
+ /*
+ * lnk files and socks do not really have an 'open'
+ */
+ if (S_ISREG(mode))
+ av |= FILE__OPEN;
+ else if (S_ISCHR(mode))
+ av |= CHR_FILE__OPEN;
+ else if (S_ISBLK(mode))
+ av |= BLK_FILE__OPEN;
+ else if (S_ISFIFO(mode))
+ av |= FIFO_FILE__OPEN;
+ else if (S_ISDIR(mode))
+ av |= DIR__OPEN;
+ else
+ printk(KERN_ERR "SELinux: WARNING: inside %s with "
+ "unknown mode:%x\n", __func__, mode);
+ }
+ return av;
+}
+
/* Convert a Linux file to an access vector. */
static inline u32 file_to_av(struct file *file)
{
else
av |= FILE__WRITE;
}
+ if (!av) {
+ /*
+ * Special file opened with flags 3 for ioctl-only use.
+ */
+ av = FILE__IOCTL;
+ }
return av;
}
/* Hook functions begin here. */
-static int selinux_ptrace(struct task_struct *parent, struct task_struct *child)
+static int selinux_ptrace(struct task_struct *parent,
+ struct task_struct *child,
+ unsigned int mode)
{
- struct task_security_struct *psec = parent->security;
- struct task_security_struct *csec = child->security;
int rc;
- rc = secondary_ops->ptrace(parent,child);
+ rc = secondary_ops->ptrace(parent, child, mode);
if (rc)
return rc;
- rc = task_has_perm(parent, child, PROCESS__PTRACE);
- /* Save the SID of the tracing process for later use in apply_creds. */
- if (!(child->ptrace & PT_PTRACED) && !rc)
- csec->ptrace_sid = psec->sid;
- return rc;
+ if (mode == PTRACE_MODE_READ) {
+ struct task_security_struct *tsec = parent->security;
+ struct task_security_struct *csec = child->security;
+ return avc_has_perm(tsec->sid, csec->sid,
+ SECCLASS_FILE, FILE__READ, NULL);
+ }
+
+ return task_has_perm(parent, child, PROCESS__PTRACE);
}
static int selinux_capget(struct task_struct *target, kernel_cap_t *effective,
- kernel_cap_t *inheritable, kernel_cap_t *permitted)
+ kernel_cap_t *inheritable, kernel_cap_t *permitted)
{
int error;
}
static int selinux_capset_check(struct task_struct *target, kernel_cap_t *effective,
- kernel_cap_t *inheritable, kernel_cap_t *permitted)
+ kernel_cap_t *inheritable, kernel_cap_t *permitted)
{
int error;
}
static void selinux_capset_set(struct task_struct *target, kernel_cap_t *effective,
- kernel_cap_t *inheritable, kernel_cap_t *permitted)
+ kernel_cap_t *inheritable, kernel_cap_t *permitted)
{
secondary_ops->capset_set(target, effective, inheritable, permitted);
}
if (rc)
return rc;
- return task_has_capability(tsk,cap);
+ return task_has_capability(tsk, cap);
}
static int selinux_sysctl_get_sid(ctl_table *table, u16 tclass, u32 *sid)
char *buffer, *path, *end;
rc = -ENOMEM;
- buffer = (char*)__get_free_page(GFP_KERNEL);
+ buffer = (char *)__get_free_page(GFP_KERNEL);
if (!buffer)
goto out;
/* The op values are "defined" in sysctl.c, thereby creating
* a bad coupling between this module and sysctl.c */
- if(op == 001) {
+ if (op == 001) {
error = avc_has_perm(tsec->sid, tsid,
SECCLASS_DIR, DIR__SEARCH, NULL);
} else {
if (av)
error = avc_has_perm(tsec->sid, tsid,
SECCLASS_FILE, av, NULL);
- }
+ }
return error;
}
return 0;
switch (cmds) {
- case Q_SYNC:
- case Q_QUOTAON:
- case Q_QUOTAOFF:
- case Q_SETINFO:
- case Q_SETQUOTA:
- rc = superblock_has_perm(current,
- sb,
- FILESYSTEM__QUOTAMOD, NULL);
- break;
- case Q_GETFMT:
- case Q_GETINFO:
- case Q_GETQUOTA:
- rc = superblock_has_perm(current,
- sb,
- FILESYSTEM__QUOTAGET, NULL);
- break;
- default:
- rc = 0; /* let the kernel handle invalid cmds */
- break;
+ case Q_SYNC:
+ case Q_QUOTAON:
+ case Q_QUOTAOFF:
+ case Q_SETINFO:
+ case Q_SETQUOTA:
+ rc = superblock_has_perm(current, sb, FILESYSTEM__QUOTAMOD,
+ NULL);
+ break;
+ case Q_GETFMT:
+ case Q_GETINFO:
+ case Q_GETQUOTA:
+ rc = superblock_has_perm(current, sb, FILESYSTEM__QUOTAGET,
+ NULL);
+ break;
+ default:
+ rc = 0; /* let the kernel handle invalid cmds */
+ break;
}
return rc;
}
return rc;
switch (type) {
- case 3: /* Read last kernel messages */
- case 10: /* Return size of the log buffer */
- rc = task_has_system(current, SYSTEM__SYSLOG_READ);
- break;
- case 6: /* Disable logging to console */
- case 7: /* Enable logging to console */
- case 8: /* Set level of messages printed to console */
- rc = task_has_system(current, SYSTEM__SYSLOG_CONSOLE);
- break;
- case 0: /* Close log */
- case 1: /* Open log */
- case 2: /* Read from log */
- case 4: /* Read/clear last kernel messages */
- case 5: /* Clear ring buffer */
- default:
- rc = task_has_system(current, SYSTEM__SYSLOG_MOD);
- break;
+ case 3: /* Read last kernel messages */
+ case 10: /* Return size of the log buffer */
+ rc = task_has_system(current, SYSTEM__SYSLOG_READ);
+ break;
+ case 6: /* Disable logging to console */
+ case 7: /* Enable logging to console */
+ case 8: /* Set level of messages printed to console */
+ rc = task_has_system(current, SYSTEM__SYSLOG_CONSOLE);
+ break;
+ case 0: /* Close log */
+ case 1: /* Open log */
+ case 2: /* Read from log */
+ case 4: /* Read/clear last kernel messages */
+ case 5: /* Clear ring buffer */
+ default:
+ rc = task_has_system(current, SYSTEM__SYSLOG_MOD);
+ break;
}
return rc;
}
return __vm_enough_memory(mm, pages, cap_sys_admin);
}
+/**
+ * task_tracer_task - return the task that is tracing the given task
+ * @task: task to consider
+ *
+ * Returns NULL if noone is tracing @task, or the &struct task_struct
+ * pointer to its tracer.
+ *
+ * Must be called under rcu_read_lock().
+ */
+static struct task_struct *task_tracer_task(struct task_struct *task)
+{
+ if (task->ptrace & PT_PTRACED)
+ return rcu_dereference(task->parent);
+ return NULL;
+}
+
/* binprm security operations */
static int selinux_bprm_alloc_security(struct linux_binprm *bprm)
if (!bsec)
return -ENOMEM;
- bsec->bprm = bprm;
bsec->sid = SECINITSID_UNLABELED;
bsec->set = 0;
} else {
/* Check for a default transition on this program. */
rc = security_transition_sid(tsec->sid, isec->sid,
- SECCLASS_PROCESS, &newsid);
+ SECCLASS_PROCESS, &newsid);
if (rc)
return rc;
}
if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
newsid = tsec->sid;
- if (tsec->sid == newsid) {
+ if (tsec->sid == newsid) {
rc = avc_has_perm(tsec->sid, isec->sid,
SECCLASS_FILE, FILE__EXECUTE_NO_TRANS, &ad);
if (rc)
return 0;
}
-static int selinux_bprm_check_security (struct linux_binprm *bprm)
+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)
+static int selinux_bprm_secureexec(struct linux_binprm *bprm)
{
struct task_security_struct *tsec = current->security;
int atsecure = 0;
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(struct files_struct *files)
{
struct avc_audit_data ad;
struct file *file, *devnull = NULL;
/* Revalidate access to inherited open files. */
- AVC_AUDIT_DATA_INIT(&ad,FS);
+ AVC_AUDIT_DATA_INIT(&ad, FS);
spin_lock(&files->file_lock);
for (;;) {
if (!set)
continue;
spin_unlock(&files->file_lock);
- for ( ; set ; i++,set >>= 1) {
+ for ( ; set ; i++, set >>= 1) {
if (set & 1) {
file = fget(i);
if (!file)
/* 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)) {
- rc = avc_has_perm(tsec->ptrace_sid, sid,
- SECCLASS_PROCESS, PROCESS__PTRACE,
- NULL);
- if (rc) {
- bsec->unsafe = 1;
- return;
+ struct task_struct *tracer;
+ struct task_security_struct *sec;
+ u32 ptsid = 0;
+
+ rcu_read_lock();
+ tracer = task_tracer_task(current);
+ if (likely(tracer != NULL)) {
+ sec = tracer->security;
+ ptsid = sec->sid;
+ }
+ rcu_read_unlock();
+
+ if (ptsid != 0) {
+ rc = avc_has_perm(ptsid, sid, SECCLASS_PROCESS,
+ PROCESS__PTRACE, NULL);
+ if (rc) {
+ bsec->unsafe = 1;
+ return;
+ }
}
}
tsec->sid = sid;
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);
+ rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur);
}
if (current->signal->rlim[RLIMIT_CPU].rlim_cur != RLIM_INFINITY) {
/*
static inline int selinux_option(char *option, int len)
{
- return (match_prefix("context=", sizeof("context=")-1, option, len) ||
- match_prefix("fscontext=", sizeof("fscontext=")-1, option, len) ||
- match_prefix("defcontext=", sizeof("defcontext=")-1, option, len) ||
- match_prefix("rootcontext=", sizeof("rootcontext=")-1, option, len));
+ 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));
}
static inline void take_option(char **to, char *from, int *first, int len)
*to += len;
}
-static inline void take_selinux_option(char **to, char *from, int *first,
- int len)
+static inline void take_selinux_option(char **to, char *from, int *first,
+ int len)
{
int current_size = 0;
if (!*first) {
**to = '|';
*to += 1;
- }
- else
+ } else
*first = 0;
while (current_size < len) {
}
}
-static int selinux_sb_copy_data(struct file_system_type *type, void *orig, void *copy)
+static int selinux_sb_copy_data(char *orig, char *copy)
{
int fnosec, fsec, rc = 0;
char *in_save, *in_curr, *in_end;
in_curr = orig;
sec_curr = copy;
- /* Binary mount data: just copy */
- if (type->fs_flags & FS_BINARY_MOUNTDATA) {
- copy_page(sec_curr, in_curr);
- goto out;
- }
-
nosec = (char *)get_zeroed_page(GFP_KERNEL);
if (!nosec) {
rc = -ENOMEM;
if (rc)
return rc;
- AVC_AUDIT_DATA_INIT(&ad,FS);
+ AVC_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = sb->s_root;
return superblock_has_perm(current, sb, FILESYSTEM__MOUNT, &ad);
}
{
struct avc_audit_data ad;
- AVC_AUDIT_DATA_INIT(&ad,FS);
+ 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);
}
-static int selinux_mount(char * dev_name,
- struct nameidata *nd,
- char * type,
- unsigned long flags,
- void * data)
+static int selinux_mount(char *dev_name,
+ struct path *path,
+ char *type,
+ unsigned long flags,
+ void *data)
{
int rc;
- rc = secondary_ops->sb_mount(dev_name, nd, type, flags, data);
+ rc = secondary_ops->sb_mount(dev_name, path, type, flags, data);
if (rc)
return rc;
if (flags & MS_REMOUNT)
- return superblock_has_perm(current, nd->path.mnt->mnt_sb,
- FILESYSTEM__REMOUNT, NULL);
+ return superblock_has_perm(current, path->mnt->mnt_sb,
+ FILESYSTEM__REMOUNT, NULL);
else
- return dentry_has_perm(current, nd->path.mnt, nd->path.dentry,
- FILE__MOUNTON);
+ return dentry_has_perm(current, path->mnt, path->dentry,
+ FILE__MOUNTON);
}
static int selinux_umount(struct vfsmount *mnt, int flags)
if (rc)
return rc;
- return superblock_has_perm(current,mnt->mnt_sb,
- FILESYSTEM__UNMOUNT,NULL);
+ return superblock_has_perm(current, mnt->mnt_sb,
+ FILESYSTEM__UNMOUNT, NULL);
}
/* inode security operations */
printk(KERN_WARNING "%s: "
"security_transition_sid failed, rc=%d (dev=%s "
"ino=%ld)\n",
- __FUNCTION__,
+ __func__,
-rc, inode->i_sb->s_id, inode->i_ino);
return rc;
}
return -EOPNOTSUPP;
if (name) {
- namep = kstrdup(XATTR_SELINUX_SUFFIX, GFP_KERNEL);
+ namep = kstrdup(XATTR_SELINUX_SUFFIX, GFP_NOFS);
if (!namep)
return -ENOMEM;
*name = namep;
}
if (value && len) {
- rc = security_sid_to_context(newsid, &context, &clen);
+ rc = security_sid_to_context_force(newsid, &context, &clen);
if (rc) {
kfree(namep);
return rc;
{
int rc;
- rc = secondary_ops->inode_link(old_dentry,dir,new_dentry);
+ 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_rename(struct inode *old_inode, struct dentry *old_dentry,
- struct inode *new_inode, struct dentry *new_dentry)
+ struct inode *new_inode, struct dentry *new_dentry)
{
return may_rename(old_inode, old_dentry, new_inode, new_dentry);
}
{
int rc;
- rc = secondary_ops->inode_follow_link(dentry,nameidata);
+ rc = secondary_ops->inode_follow_link(dentry, nameidata);
if (rc)
return rc;
return dentry_has_perm(current, NULL, dentry, FILE__READ);
}
return inode_has_perm(current, inode,
- file_mask_to_av(inode->i_mode, mask), NULL);
+ open_file_mask_to_av(inode->i_mode, mask), NULL);
}
static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
return dentry_has_perm(current, mnt, dentry, FILE__GETATTR);
}
-static int selinux_inode_setotherxattr(struct dentry *dentry, char *name)
+static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
{
if (!strncmp(name, XATTR_SECURITY_PREFIX,
sizeof XATTR_SECURITY_PREFIX - 1)) {
return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
}
-static int selinux_inode_setxattr(struct dentry *dentry, char *name, void *value, size_t size, int flags)
+static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
{
struct task_security_struct *tsec = current->security;
struct inode *inode = dentry->d_inode;
if (!is_owner_or_cap(inode))
return -EPERM;
- AVC_AUDIT_DATA_INIT(&ad,FS);
+ AVC_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = dentry;
rc = avc_has_perm(tsec->sid, isec->sid, isec->sclass,
return rc;
rc = security_context_to_sid(value, size, &newsid);
+ if (rc == -EINVAL) {
+ if (!capable(CAP_MAC_ADMIN))
+ return rc;
+ rc = security_context_to_sid_force(value, size, &newsid);
+ }
if (rc)
return rc;
return rc;
rc = security_validate_transition(isec->sid, newsid, tsec->sid,
- isec->sclass);
+ isec->sclass);
if (rc)
return rc;
&ad);
}
-static void selinux_inode_post_setxattr(struct dentry *dentry, char *name,
- void *value, size_t size, int flags)
+static void selinux_inode_post_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size,
+ int flags)
{
struct inode *inode = dentry->d_inode;
struct inode_security_struct *isec = inode->i_security;
return;
}
- rc = security_context_to_sid(value, size, &newsid);
+ rc = security_context_to_sid_force(value, size, &newsid);
if (rc) {
- printk(KERN_WARNING "%s: unable to obtain SID for context "
- "%s, rc=%d\n", __FUNCTION__, (char*)value, -rc);
+ printk(KERN_ERR "SELinux: unable to map context to SID"
+ "for (%s, %lu), rc=%d\n",
+ inode->i_sb->s_id, inode->i_ino, -rc);
return;
}
return;
}
-static int selinux_inode_getxattr (struct dentry *dentry, char *name)
+static int selinux_inode_getxattr(struct dentry *dentry, const char *name)
{
return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
}
-static int selinux_inode_listxattr (struct dentry *dentry)
+static int selinux_inode_listxattr(struct dentry *dentry)
{
return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
}
-static int selinux_inode_removexattr (struct dentry *dentry, char *name)
+static int selinux_inode_removexattr(struct dentry *dentry, const char *name)
{
if (strcmp(name, XATTR_NAME_SELINUX))
return selinux_inode_setotherxattr(dentry, name);
}
static int selinux_inode_setsecurity(struct inode *inode, const char *name,
- const void *value, size_t size, int flags)
+ const void *value, size_t size, int flags)
{
struct inode_security_struct *isec = inode->i_security;
u32 newsid;
if (!value || !size)
return -EACCES;
- rc = security_context_to_sid((void*)value, size, &newsid);
+ rc = security_context_to_sid((void *)value, size, &newsid);
if (rc)
return rc;
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;
+ *secid = isec->sid;
+}
+
/* file security operations */
static int selinux_revalidate_file_permission(struct file *file, int mask)
int error = 0;
switch (cmd) {
- case FIONREAD:
- /* fall through */
- case FIBMAP:
- /* fall through */
- case FIGETBSZ:
- /* fall through */
- case EXT2_IOC_GETFLAGS:
- /* fall through */
- case EXT2_IOC_GETVERSION:
- error = file_has_perm(current, file, FILE__GETATTR);
- break;
-
- case EXT2_IOC_SETFLAGS:
- /* fall through */
- case EXT2_IOC_SETVERSION:
- error = file_has_perm(current, file, FILE__SETATTR);
- break;
+ case FIONREAD:
+ /* fall through */
+ case FIBMAP:
+ /* fall through */
+ case FIGETBSZ:
+ /* fall through */
+ case EXT2_IOC_GETFLAGS:
+ /* fall through */
+ case EXT2_IOC_GETVERSION:
+ error = file_has_perm(current, file, FILE__GETATTR);
+ break;
- /* sys_ioctl() checks */
- case FIONBIO:
- /* fall through */
- case FIOASYNC:
- error = file_has_perm(current, file, 0);
- break;
+ case EXT2_IOC_SETFLAGS:
+ /* fall through */
+ case EXT2_IOC_SETVERSION:
+ error = file_has_perm(current, file, FILE__SETATTR);
+ break;
- case KDSKBENT:
- case KDSKBSENT:
- error = task_has_capability(current,CAP_SYS_TTY_CONFIG);
- break;
+ /* sys_ioctl() checks */
+ case FIONBIO:
+ /* fall through */
+ case FIOASYNC:
+ error = file_has_perm(current, file, 0);
+ break;
- /* default case assumes that the command will go
- * to the file's ioctl() function.
- */
- default:
- error = file_has_perm(current, file, FILE__IOCTL);
+ case KDSKBENT:
+ case KDSKBSENT:
+ error = task_has_capability(current, CAP_SYS_TTY_CONFIG);
+ break;
+ /* default case assumes that the command will go
+ * to the file's ioctl() function.
+ */
+ default:
+ error = file_has_perm(current, file, FILE__IOCTL);
}
return error;
}
unsigned long addr, unsigned long addr_only)
{
int rc = 0;
- u32 sid = ((struct task_security_struct*)(current->security))->sid;
+ u32 sid = ((struct task_security_struct *)(current->security))->sid;
if (addr < mmap_min_addr)
rc = avc_has_perm(sid, sid, SECCLASS_MEMPROTECT,
int err = 0;
switch (cmd) {
- case F_SETFL:
- if (!file->f_path.dentry || !file->f_path.dentry->d_inode) {
- err = -EINVAL;
- break;
- }
+ case F_SETFL:
+ if (!file->f_path.dentry || !file->f_path.dentry->d_inode) {
+ err = -EINVAL;
+ break;
+ }
- if ((file->f_flags & O_APPEND) && !(arg & O_APPEND)) {
- err = file_has_perm(current, file,FILE__WRITE);
- break;
- }
- /* fall through */
- case F_SETOWN:
- case F_SETSIG:
- case F_GETFL:
- case F_GETOWN:
- case F_GETSIG:
- /* Just check FD__USE permission */
- err = file_has_perm(current, file, 0);
+ if ((file->f_flags & O_APPEND) && !(arg & O_APPEND)) {
+ err = file_has_perm(current, file, FILE__WRITE);
break;
- case F_GETLK:
- case F_SETLK:
- case F_SETLKW:
+ }
+ /* fall through */
+ case F_SETOWN:
+ case F_SETSIG:
+ case F_GETFL:
+ case F_GETOWN:
+ case F_GETSIG:
+ /* Just check FD__USE permission */
+ err = file_has_perm(current, file, 0);
+ break;
+ case F_GETLK:
+ case F_SETLK:
+ case F_SETLKW:
#if BITS_PER_LONG == 32
- case F_GETLK64:
- case F_SETLK64:
- case F_SETLKW64:
+ case F_GETLK64:
+ case F_SETLK64:
+ case F_SETLKW64:
#endif
- if (!file->f_path.dentry || !file->f_path.dentry->d_inode) {
- err = -EINVAL;
- break;
- }
- err = file_has_perm(current, file, FILE__LOCK);
+ if (!file->f_path.dentry || !file->f_path.dentry->d_inode) {
+ err = -EINVAL;
break;
+ }
+ err = file_has_perm(current, file, FILE__LOCK);
+ break;
}
return err;
static int selinux_file_send_sigiotask(struct task_struct *tsk,
struct fown_struct *fown, int signum)
{
- struct file *file;
+ struct file *file;
u32 perm;
struct task_security_struct *tsec;
struct file_security_struct *fsec;
/* struct fown_struct is never outside the context of a struct file */
- file = container_of(fown, struct file, f_owner);
+ file = container_of(fown, struct file, f_owner);
tsec = tsk->security;
fsec = file->f_security;
tsec2->keycreate_sid = tsec1->keycreate_sid;
tsec2->sockcreate_sid = tsec1->sockcreate_sid;
- /* Retain ptracer SID across fork, if any.
- This will be reset by the ptrace hook upon any
- subsequent ptrace_attach operations. */
- tsec2->ptrace_sid = tsec1->ptrace_sid;
-
return 0;
}
static int selinux_task_post_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
{
- return secondary_ops->task_post_setuid(id0,id1,id2,flags);
+ return secondary_ops->task_post_setuid(id0, id1, id2, flags);
}
static int selinux_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
static void selinux_task_getsecid(struct task_struct *p, u32 *secid)
{
- selinux_get_task_sid(p, secid);
+ struct task_security_struct *tsec = p->security;
+ *secid = tsec->sid;
}
static int selinux_task_setgroups(struct group_info *group_info)
if (rc)
return rc;
- return task_has_perm(current,p, PROCESS__SETSCHED);
+ return task_has_perm(current, p, PROCESS__SETSCHED);
}
static int selinux_task_setioprio(struct task_struct *p, int ioprio)
if (rc)
return rc;
- if (info != SEND_SIG_NOINFO && (is_si_special(info) || SI_FROMKERNEL(info)))
- return 0;
-
if (!sig)
perm = PROCESS__SIGNULL; /* null signal; existence test */
else
unsigned long arg2,
unsigned long arg3,
unsigned long arg4,
- unsigned long arg5)
+ 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 0;
+ return secondary_ops->task_prctl(option, arg2, arg3, arg4, arg5, rc_p);
}
static int selinux_task_wait(struct task_struct *p)
static void selinux_task_reparent_to_init(struct task_struct *p)
{
- struct task_security_struct *tsec;
+ struct task_security_struct *tsec;
secondary_ops->task_reparent_to_init(p);
*proto = ih->protocol;
switch (ih->protocol) {
- case IPPROTO_TCP: {
- struct tcphdr _tcph, *th;
+ case IPPROTO_TCP: {
+ struct tcphdr _tcph, *th;
- if (ntohs(ih->frag_off) & IP_OFFSET)
- break;
+ if (ntohs(ih->frag_off) & IP_OFFSET)
+ break;
offset += ihlen;
th = skb_header_pointer(skb, offset, sizeof(_tcph), &_tcph);
ad->u.net.sport = th->source;
ad->u.net.dport = th->dest;
break;
- }
-
- case IPPROTO_UDP: {
- struct udphdr _udph, *uh;
-
- if (ntohs(ih->frag_off) & IP_OFFSET)
- break;
-
+ }
+
+ case IPPROTO_UDP: {
+ struct udphdr _udph, *uh;
+
+ if (ntohs(ih->frag_off) & IP_OFFSET)
+ break;
+
offset += ihlen;
- uh = skb_header_pointer(skb, offset, sizeof(_udph), &_udph);
+ uh = skb_header_pointer(skb, offset, sizeof(_udph), &_udph);
if (uh == NULL)
- break;
+ break;
- ad->u.net.sport = uh->source;
- ad->u.net.dport = uh->dest;
- break;
- }
+ ad->u.net.sport = uh->source;
+ ad->u.net.dport = uh->dest;
+ break;
+ }
case IPPROTO_DCCP: {
struct dccp_hdr _dccph, *dh;
ad->u.net.sport = dh->dccph_sport;
ad->u.net.dport = dh->dccph_dport;
break;
- }
+ }
- default:
- break;
- }
+ default:
+ break;
+ }
out:
return ret;
}
switch (nexthdr) {
case IPPROTO_TCP: {
- struct tcphdr _tcph, *th;
+ struct tcphdr _tcph, *th;
th = skb_header_pointer(skb, offset, sizeof(_tcph), &_tcph);
if (th == NULL)
ad->u.net.sport = dh->dccph_sport;
ad->u.net.dport = dh->dccph_dport;
break;
- }
+ }
/* includes fragments */
default:
if (isec->sid == SECINITSID_KERNEL)
goto out;
- AVC_AUDIT_DATA_INIT(&ad,NET);
+ AVC_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sk = sock->sk;
err = avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, &ad);
inet_get_local_port_range(&low, &high);
if (snum < max(PROT_SOCK, low) || snum > high) {
- err = security_port_sid(sk->sk_family,
- sk->sk_type,
- sk->sk_protocol, snum,
- &sid);
+ err = sel_netport_sid(sk->sk_protocol,
+ snum, &sid);
if (err)
goto out;
- AVC_AUDIT_DATA_INIT(&ad,NET);
+ AVC_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sport = htons(snum);
ad.u.net.family = family;
err = avc_has_perm(isec->sid, sid,
goto out;
}
}
-
- switch(isec->sclass) {
+
+ switch (isec->sclass) {
case SECCLASS_TCP_SOCKET:
node_perm = TCP_SOCKET__NODE_BIND;
break;
-
+
case SECCLASS_UDP_SOCKET:
node_perm = UDP_SOCKET__NODE_BIND;
break;
node_perm = RAWIP_SOCKET__NODE_BIND;
break;
}
-
+
err = sel_netnode_sid(addrp, family, &sid);
if (err)
goto out;
-
- AVC_AUDIT_DATA_INIT(&ad,NET);
+
+ AVC_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sport = htons(snum);
ad.u.net.family = family;
ipv6_addr_copy(&ad.u.net.v6info.saddr, &addr6->sin6_addr);
err = avc_has_perm(isec->sid, sid,
- isec->sclass, node_perm, &ad);
+ isec->sclass, node_perm, &ad);
if (err)
goto out;
}
snum = ntohs(addr6->sin6_port);
}
- err = security_port_sid(sk->sk_family, sk->sk_type,
- sk->sk_protocol, snum, &sid);
+ err = sel_netport_sid(sk->sk_protocol, snum, &sid);
if (err)
goto out;
perm = (isec->sclass == SECCLASS_TCP_SOCKET) ?
TCP_SOCKET__NAME_CONNECT : DCCP_SOCKET__NAME_CONNECT;
- AVC_AUDIT_DATA_INIT(&ad,NET);
+ AVC_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.dport = htons(snum);
ad.u.net.family = sk->sk_family;
err = avc_has_perm(isec->sid, sid, isec->sclass, perm, &ad);
}
static int selinux_socket_sendmsg(struct socket *sock, struct msghdr *msg,
- int size)
+ int size)
{
int rc;
return socket_has_perm(current, sock, SOCKET__GETATTR);
}
-static int selinux_socket_setsockopt(struct socket *sock,int level,int optname)
+static int selinux_socket_setsockopt(struct socket *sock, int level, int optname)
{
int err;
isec = SOCK_INODE(sock)->i_security;
other_isec = SOCK_INODE(other)->i_security;
- AVC_AUDIT_DATA_INIT(&ad,NET);
+ AVC_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sk = other->sk;
err = avc_has_perm(isec->sid, other_isec->sid,
/* connecting socket */
ssec = sock->sk->sk_security;
ssec->peer_sid = other_isec->sid;
-
+
/* server child socket */
ssec = newsk->sk_security;
ssec->peer_sid = isec->sid;
isec = SOCK_INODE(sock)->i_security;
other_isec = SOCK_INODE(other)->i_security;
- AVC_AUDIT_DATA_INIT(&ad,NET);
+ AVC_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sk = other->sk;
err = avc_has_perm(isec->sid, other_isec->sid,
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;
if (!recv_perm)
return 0;
- err = security_port_sid(sk->sk_family, sk->sk_type,
- sk->sk_protocol, ntohs(ad->u.net.sport),
- &port_sid);
+ err = sel_netport_sid(sk->sk_protocol,
+ ntohs(ad->u.net.sport), &port_sid);
if (unlikely(err)) {
printk(KERN_WARNING
"SELinux: failure in"
err = -EFAULT;
kfree(scontext);
-out:
+out:
return err;
}
goto out;
if (sock && family == PF_UNIX)
- selinux_get_inode_sid(SOCK_INODE(sock), &peer_secid);
+ selinux_inode_getsecid(SOCK_INODE(sock), &peer_secid);
else if (skb)
selinux_skb_peerlbl_sid(skb, family, &peer_secid);
newssec->peer_sid = ssec->peer_sid;
newssec->sclass = ssec->sclass;
- selinux_netlbl_sk_security_clone(ssec, newssec);
+ selinux_netlbl_sk_security_reset(newssec, newsk->sk_family);
}
static void selinux_sk_getsecid(struct sock *sk, u32 *secid)
}
}
-static void selinux_sock_graft(struct sock* sk, struct socket *parent)
+static void selinux_sock_graft(struct sock *sk, struct socket *parent)
{
struct inode_security_struct *isec = SOCK_INODE(parent)->i_security;
struct sk_security_struct *sksec = sk->sk_security;
struct nlmsghdr *nlh;
struct socket *sock = sk->sk_socket;
struct inode_security_struct *isec = SOCK_INODE(sock)->i_security;
-
+
if (skb->len < NLMSG_SPACE(0)) {
err = -EINVAL;
goto out;
}
nlh = nlmsg_hdr(skb);
-
+
err = selinux_nlmsg_lookup(isec->sclass, nlh->nlmsg_type, &perm);
if (err) {
if (err == -EINVAL) {
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;
if (send_perm != 0)
return 0;
- err = security_port_sid(sk->sk_family, sk->sk_type,
- sk->sk_protocol, ntohs(ad->u.net.dport),
- &port_sid);
+ err = sel_netport_sid(sk->sk_protocol,
+ ntohs(ad->u.net.dport), &port_sid);
if (unlikely(err)) {
printk(KERN_WARNING
"SELinux: failure in"
ad.u.cap = capability;
return avc_has_perm(NETLINK_CB(skb).sid, NETLINK_CB(skb).sid,
- SECCLASS_CAPABILITY, CAP_TO_MASK(capability), &ad);
+ SECCLASS_CAPABILITY, CAP_TO_MASK(capability), &ad);
}
static int ipc_alloc_security(struct task_struct *task,
return -ENOMEM;
isec->sclass = sclass;
- isec->ipc_perm = perm;
isec->sid = tsec->sid;
perm->security = isec;
if (!msec)
return -ENOMEM;
- msec->msg = msg;
msec->sid = SECINITSID_UNLABELED;
msg->security = msec;
isec = msq->q_perm.security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
- ad.u.ipc_id = msq->q_perm.key;
+ ad.u.ipc_id = msq->q_perm.key;
rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
MSGQ__CREATE, &ad);
int err;
int perms;
- switch(cmd) {
+ switch (cmd) {
case IPC_INFO:
case MSG_INFO:
/* No specific object, just general system-wide information. */
msec = msg->security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
- ad.u.ipc_id = msq->q_perm.key;
+ ad.u.ipc_id = msq->q_perm.key;
rc = avc_has_perm(tsec->sid, isec->sid,
SECCLASS_MSGQ, MSGQ__READ, &ad);
isec = shp->shm_perm.security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
- ad.u.ipc_id = shp->shm_perm.key;
+ ad.u.ipc_id = shp->shm_perm.key;
rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_SHM,
SHM__CREATE, &ad);
int perms;
int err;
- switch(cmd) {
+ switch (cmd) {
case IPC_INFO:
case SHM_INFO:
/* No specific object, just general system-wide information. */
isec = sma->sem_perm.security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
- ad.u.ipc_id = sma->sem_perm.key;
+ ad.u.ipc_id = sma->sem_perm.key;
rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_SEM,
SEM__CREATE, &ad);
int err;
u32 perms;
- switch(cmd) {
+ switch (cmd) {
case IPC_INFO:
case SEM_INFO:
/* No specific object, just general system-wide information. */
return ipc_has_perm(ipcp, av);
}
+static void selinux_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
+{
+ struct ipc_security_struct *isec = ipcp->security;
+ *secid = isec->sid;
+}
+
/* module stacking operations */
-static int selinux_register_security (const char *name, struct security_operations *ops)
+static int selinux_register_security(const char *name, struct security_operations *ops)
{
if (secondary_ops != original_ops) {
printk(KERN_ERR "%s: There is already a secondary security "
- "module registered.\n", __FUNCTION__);
+ "module registered.\n", __func__);
return -EINVAL;
- }
+ }
secondary_ops = ops;
printk(KERN_INFO "%s: Registering secondary module %s\n",
- __FUNCTION__,
+ __func__,
name);
return 0;
}
-static void selinux_d_instantiate (struct dentry *dentry, struct inode *inode)
+static void selinux_d_instantiate(struct dentry *dentry, struct inode *inode)
{
if (inode)
inode_doinit_with_dentry(inode, dentry);
char *name, void *value, size_t size)
{
struct task_security_struct *tsec;
+ struct task_struct *tracer;
u32 sid = 0;
int error;
char *str = value;
size--;
}
error = security_context_to_sid(value, size, &sid);
+ if (error == -EINVAL && !strcmp(name, "fscreate")) {
+ if (!capable(CAP_MAC_ADMIN))
+ return error;
+ error = security_context_to_sid_force(value, size,
+ &sid);
+ }
if (error)
return error;
}
}
while_each_thread(g, t);
read_unlock(&tasklist_lock);
- }
+ }
/* Check permissions for the transition. */
error = avc_has_perm(tsec->sid, sid, SECCLASS_PROCESS,
- PROCESS__DYNTRANSITION, NULL);
+ PROCESS__DYNTRANSITION, NULL);
if (error)
return error;
/* Check for ptracing, and update the task SID if ok.
Otherwise, leave SID unchanged and fail. */
task_lock(p);
- if (p->ptrace & PT_PTRACED) {
- error = avc_has_perm_noaudit(tsec->ptrace_sid, sid,
+ rcu_read_lock();
+ tracer = task_tracer_task(p);
+ if (tracer != NULL) {
+ struct task_security_struct *ptsec = tracer->security;
+ u32 ptsid = ptsec->sid;
+ 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(tsec->ptrace_sid, sid, SECCLASS_PROCESS,
+ avc_audit(ptsid, sid, SECCLASS_PROCESS,
PROCESS__PTRACE, &avd, error, NULL);
if (error)
return error;
} else {
+ rcu_read_unlock();
tsec->sid = sid;
task_unlock(p);
}
- }
- else
+ } else
return -EINVAL;
return size;
return security_sid_to_context(secid, secdata, seclen);
}
-static int selinux_secctx_to_secid(char *secdata, u32 seclen, u32 *secid)
+static int selinux_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
{
return security_context_to_sid(secdata, seclen, secid);
}
if (!ksec)
return -ENOMEM;
- ksec->obj = k;
if (tsec->keycreate_sid)
ksec->sid = tsec->keycreate_sid;
else
SECCLASS_KEY, perm, NULL);
}
+static int selinux_key_getsecurity(struct key *key, char **_buffer)
+{
+ struct key_security_struct *ksec = key->security;
+ char *context = NULL;
+ unsigned len;
+ int rc;
+
+ rc = security_sid_to_context(ksec->sid, &context, &len);
+ if (!rc)
+ rc = len;
+ *_buffer = context;
+ return rc;
+}
+
#endif
static struct security_operations selinux_ops = {
+ .name = "selinux",
+
.ptrace = selinux_ptrace,
.capget = selinux_capget,
.capset_check = selinux_capset_check,
.vm_enough_memory = selinux_vm_enough_memory,
.netlink_send = selinux_netlink_send,
- .netlink_recv = selinux_netlink_recv,
+ .netlink_recv = selinux_netlink_recv,
.bprm_alloc_security = selinux_bprm_alloc_security,
.bprm_free_security = selinux_bprm_free_security,
.sb_alloc_security = selinux_sb_alloc_security,
.sb_free_security = selinux_sb_free_security,
.sb_copy_data = selinux_sb_copy_data,
- .sb_kern_mount = selinux_sb_kern_mount,
+ .sb_kern_mount = selinux_sb_kern_mount,
.sb_statfs = selinux_sb_statfs,
.sb_mount = selinux_mount,
.sb_umount = selinux_umount,
.sb_get_mnt_opts = selinux_get_mnt_opts,
.sb_set_mnt_opts = selinux_set_mnt_opts,
- .sb_clone_mnt_opts = selinux_sb_clone_mnt_opts,
+ .sb_clone_mnt_opts = selinux_sb_clone_mnt_opts,
+ .sb_parse_opts_str = selinux_parse_opts_str,
+
.inode_alloc_security = selinux_inode_alloc_security,
.inode_free_security = selinux_inode_free_security,
.inode_getxattr = selinux_inode_getxattr,
.inode_listxattr = selinux_inode_listxattr,
.inode_removexattr = selinux_inode_removexattr,
- .inode_getsecurity = selinux_inode_getsecurity,
- .inode_setsecurity = selinux_inode_setsecurity,
- .inode_listsecurity = selinux_inode_listsecurity,
+ .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,
.file_alloc_security = selinux_file_alloc_security,
.file_send_sigiotask = selinux_file_send_sigiotask,
.file_receive = selinux_file_receive,
- .dentry_open = selinux_dentry_open,
+ .dentry_open = selinux_dentry_open,
.task_create = selinux_task_create,
.task_alloc_security = selinux_task_alloc_security,
.task_setgid = selinux_task_setgid,
.task_setpgid = selinux_task_setpgid,
.task_getpgid = selinux_task_getpgid,
- .task_getsid = selinux_task_getsid,
+ .task_getsid = selinux_task_getsid,
.task_getsecid = selinux_task_getsecid,
.task_setgroups = selinux_task_setgroups,
.task_setnice = selinux_task_setnice,
.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,
+ .task_to_inode = selinux_task_to_inode,
.ipc_permission = selinux_ipc_permission,
+ .ipc_getsecid = selinux_ipc_getsecid,
.msg_msg_alloc_security = selinux_msg_msg_alloc_security,
.msg_msg_free_security = selinux_msg_msg_free_security,
.shm_shmctl = selinux_shm_shmctl,
.shm_shmat = selinux_shm_shmat,
- .sem_alloc_security = selinux_sem_alloc_security,
- .sem_free_security = selinux_sem_free_security,
+ .sem_alloc_security = selinux_sem_alloc_security,
+ .sem_free_security = selinux_sem_free_security,
.sem_associate = selinux_sem_associate,
.sem_semctl = selinux_sem_semctl,
.sem_semop = selinux_sem_semop,
.register_security = selinux_register_security,
- .d_instantiate = selinux_d_instantiate,
+ .d_instantiate = selinux_d_instantiate,
- .getprocattr = selinux_getprocattr,
- .setprocattr = selinux_setprocattr,
+ .getprocattr = selinux_getprocattr,
+ .setprocattr = selinux_setprocattr,
.secid_to_secctx = selinux_secid_to_secctx,
.secctx_to_secid = selinux_secctx_to_secid,
.release_secctx = selinux_release_secctx,
- .unix_stream_connect = selinux_socket_unix_stream_connect,
+ .unix_stream_connect = selinux_socket_unix_stream_connect,
.unix_may_send = selinux_socket_unix_may_send,
.socket_create = selinux_socket_create,
.sk_alloc_security = selinux_sk_alloc_security,
.sk_free_security = selinux_sk_free_security,
.sk_clone_security = selinux_sk_clone_security,
- .sk_getsecid = selinux_sk_getsecid,
+ .sk_getsecid = selinux_sk_getsecid,
.sock_graft = selinux_sock_graft,
.inet_conn_request = selinux_inet_conn_request,
.inet_csk_clone = selinux_inet_csk_clone,
.xfrm_state_alloc_security = selinux_xfrm_state_alloc,
.xfrm_state_free_security = selinux_xfrm_state_free,
.xfrm_state_delete_security = selinux_xfrm_state_delete,
- .xfrm_policy_lookup = selinux_xfrm_policy_lookup,
+ .xfrm_policy_lookup = selinux_xfrm_policy_lookup,
.xfrm_state_pol_flow_match = selinux_xfrm_state_pol_flow_match,
.xfrm_decode_session = selinux_xfrm_decode_session,
#endif
#ifdef CONFIG_KEYS
- .key_alloc = selinux_key_alloc,
- .key_free = selinux_key_free,
- .key_permission = selinux_key_permission,
+ .key_alloc = selinux_key_alloc,
+ .key_free = selinux_key_free,
+ .key_permission = selinux_key_permission,
+ .key_getsecurity = selinux_key_getsecurity,
+#endif
+
+#ifdef CONFIG_AUDIT
+ .audit_rule_init = selinux_audit_rule_init,
+ .audit_rule_known = selinux_audit_rule_known,
+ .audit_rule_match = selinux_audit_rule_match,
+ .audit_rule_free = selinux_audit_rule_free,
#endif
};
{
struct task_security_struct *tsec;
+ if (!security_module_enable(&selinux_ops)) {
+ selinux_enabled = 0;
+ return 0;
+ }
+
if (!selinux_enabled) {
printk(KERN_INFO "SELinux: Disabled at boot.\n");
return 0;
original_ops = secondary_ops = security_ops;
if (!secondary_ops)
- panic ("SELinux: No initial security operations\n");
- if (register_security (&selinux_ops))
+ panic("SELinux: No initial security operations\n");
+ if (register_security(&selinux_ops))
panic("SELinux: Unable to register with kernel.\n");
- if (selinux_enforcing) {
+ if (selinux_enforcing)
printk(KERN_DEBUG "SELinux: Starting in enforcing mode\n");
- } else {
+ else
printk(KERN_DEBUG "SELinux: Starting in permissive mode\n");
- }
-
-#ifdef CONFIG_KEYS
- /* Add security information to initial keyrings */
- selinux_key_alloc(&root_user_keyring, current,
- KEY_ALLOC_NOT_IN_QUOTA);
- selinux_key_alloc(&root_session_keyring, current,
- KEY_ALLOC_NOT_IN_QUOTA);
-#endif
return 0;
}
if (!list_empty(&superblock_security_head)) {
struct superblock_security_struct *sbsec =
list_entry(superblock_security_head.next,
- struct superblock_security_struct,
- list);
+ struct superblock_security_struct,
+ list);
struct super_block *sb = sbsec->sb;
sb->s_count++;
spin_unlock(&sb_security_lock);
#endif /* CONFIG_NETFILTER */
#ifdef CONFIG_SECURITY_SELINUX_DISABLE
+static int selinux_disabled;
+
int selinux_disable(void)
{
extern void exit_sel_fs(void);
- static int selinux_disabled = 0;
if (ss_initialized) {
/* Not permitted after initial policy load. */
return 0;
}
#endif
-
-
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff