*
*
* Alan Cox : security fixes.
- * <Alan.Cox@linux.org>
+ * <alan@lxorguk.ukuu.org.uk>
*
* Al Viro : safe handling of mm_struct
*
#include <linux/mman.h>
#include <linux/proc_fs.h>
#include <linux/ioport.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/pagemap.h>
#include <linux/signal.h>
#include <linux/highmem.h>
#include <linux/file.h>
+#include <linux/fdtable.h>
#include <linux/times.h>
#include <linux/cpuset.h>
#include <linux/rcupdate.h>
#include <linux/delayacct.h>
+#include <linux/seq_file.h>
+#include <linux/pid_namespace.h>
+#include <linux/ptrace.h>
+#include <linux/tracehook.h>
+#include <linux/swapops.h>
-#include <asm/uaccess.h>
#include <asm/pgtable.h>
-#include <asm/io.h>
#include <asm/processor.h>
#include "internal.h"
-/* Gcc optimizes away "strlen(x)" for constant x */
-#define ADDBUF(buffer, string) \
-do { memcpy(buffer, string, strlen(string)); \
- buffer += strlen(string); } while (0)
-
-static inline char * task_name(struct task_struct *p, char * buf)
+static inline void task_name(struct seq_file *m, struct task_struct *p)
{
int i;
- char * name;
+ char *buf, *end;
+ char *name;
char tcomm[sizeof(p->comm)];
get_task_comm(tcomm, p);
- ADDBUF(buf, "Name:\t");
+ seq_printf(m, "Name:\t");
+ end = m->buf + m->size;
+ buf = m->buf + m->count;
name = tcomm;
i = sizeof(tcomm);
- do {
+ while (i && (buf < end)) {
unsigned char c = *name;
name++;
i--;
if (!c)
break;
if (c == '\\') {
- buf[1] = c;
- buf += 2;
+ buf++;
+ if (buf < end)
+ *buf++ = c;
continue;
}
if (c == '\n') {
- buf[0] = '\\';
- buf[1] = 'n';
- buf += 2;
+ *buf++ = '\\';
+ if (buf < end)
+ *buf++ = 'n';
continue;
}
buf++;
- } while (i);
- *buf = '\n';
- return buf+1;
+ }
+ m->count = buf - m->buf;
+ seq_printf(m, "\n");
}
/*
* simple bit tests.
*/
static const char *task_state_array[] = {
- "R (running)", /* 0 */
- "S (sleeping)", /* 1 */
- "D (disk sleep)", /* 2 */
- "T (stopped)", /* 4 */
- "T (tracing stop)", /* 8 */
- "Z (zombie)", /* 16 */
- "X (dead)" /* 32 */
+ "R (running)", /* 0 */
+ "S (sleeping)", /* 1 */
+ "D (disk sleep)", /* 2 */
+ "T (stopped)", /* 4 */
+ "t (tracing stop)", /* 8 */
+ "Z (zombie)", /* 16 */
+ "X (dead)", /* 32 */
+ "x (dead)", /* 64 */
+ "K (wakekill)", /* 128 */
+ "W (waking)", /* 256 */
};
-static inline const char * get_task_state(struct task_struct *tsk)
+static inline const char *get_task_state(struct task_struct *tsk)
{
- unsigned int state = (tsk->state & (TASK_RUNNING |
- TASK_INTERRUPTIBLE |
- TASK_UNINTERRUPTIBLE |
- TASK_STOPPED |
- TASK_TRACED)) |
- (tsk->exit_state & (EXIT_ZOMBIE |
- EXIT_DEAD));
+ unsigned int state = (tsk->state & TASK_REPORT) | tsk->exit_state;
const char **p = &task_state_array[0];
+ BUILD_BUG_ON(1 + ilog2(TASK_STATE_MAX) != ARRAY_SIZE(task_state_array));
+
while (state) {
p++;
state >>= 1;
return *p;
}
-static inline char * task_state(struct task_struct *p, char *buffer)
+static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *p)
{
struct group_info *group_info;
int g;
struct fdtable *fdt = NULL;
+ const struct cred *cred;
+ pid_t ppid, tpid;
rcu_read_lock();
- buffer += sprintf(buffer,
+ ppid = pid_alive(p) ?
+ task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
+ tpid = 0;
+ if (pid_alive(p)) {
+ struct task_struct *tracer = tracehook_tracer_task(p);
+ if (tracer)
+ tpid = task_pid_nr_ns(tracer, ns);
+ }
+ cred = get_cred((struct cred *) __task_cred(p));
+ seq_printf(m,
"State:\t%s\n"
"Tgid:\t%d\n"
"Pid:\t%d\n"
"Uid:\t%d\t%d\t%d\t%d\n"
"Gid:\t%d\t%d\t%d\t%d\n",
get_task_state(p),
- p->tgid, p->pid,
- pid_alive(p) ? rcu_dereference(p->real_parent)->tgid : 0,
- pid_alive(p) && p->ptrace ? rcu_dereference(p->parent)->pid : 0,
- p->uid, p->euid, p->suid, p->fsuid,
- p->gid, p->egid, p->sgid, p->fsgid);
+ task_tgid_nr_ns(p, ns),
+ pid_nr_ns(pid, ns),
+ ppid, tpid,
+ cred->uid, cred->euid, cred->suid, cred->fsuid,
+ cred->gid, cred->egid, cred->sgid, cred->fsgid);
task_lock(p);
if (p->files)
fdt = files_fdtable(p->files);
- buffer += sprintf(buffer,
+ seq_printf(m,
"FDSize:\t%d\n"
"Groups:\t",
fdt ? fdt->max_fds : 0);
rcu_read_unlock();
- group_info = p->group_info;
- get_group_info(group_info);
+ group_info = cred->group_info;
task_unlock(p);
- for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
- buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
- put_group_info(group_info);
+ for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
+ seq_printf(m, "%d ", GROUP_AT(group_info, g));
+ put_cred(cred);
- buffer += sprintf(buffer, "\n");
- return buffer;
+ seq_printf(m, "\n");
}
-static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
+static void render_sigset_t(struct seq_file *m, const char *header,
+ sigset_t *set)
{
- int i, len;
+ int i;
- len = strlen(header);
- memcpy(buffer, header, len);
- buffer += len;
+ seq_printf(m, "%s", header);
i = _NSIG;
do {
if (sigismember(set, i+2)) x |= 2;
if (sigismember(set, i+3)) x |= 4;
if (sigismember(set, i+4)) x |= 8;
- *buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
+ seq_printf(m, "%x", x);
} while (i >= 4);
- *buffer++ = '\n';
- *buffer = 0;
- return buffer;
+ seq_printf(m, "\n");
}
static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
}
}
-static inline char * task_sig(struct task_struct *p, char *buffer)
+static inline void task_sig(struct seq_file *m, struct task_struct *p)
{
unsigned long flags;
sigset_t pending, shpending, blocked, ignored, caught;
sigemptyset(&ignored);
sigemptyset(&caught);
- rcu_read_lock();
if (lock_task_sighand(p, &flags)) {
pending = p->pending.signal;
shpending = p->signal->shared_pending.signal;
blocked = p->blocked;
collect_sigign_sigcatch(p, &ignored, &caught);
num_threads = atomic_read(&p->signal->count);
- qsize = atomic_read(&p->user->sigpending);
- qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
+ rcu_read_lock(); /* FIXME: is this correct? */
+ qsize = atomic_read(&__task_cred(p)->user->sigpending);
+ rcu_read_unlock();
+ qlim = task_rlimit(p, RLIMIT_SIGPENDING);
unlock_task_sighand(p, &flags);
}
- rcu_read_unlock();
- buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
- buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
+ seq_printf(m, "Threads:\t%d\n", num_threads);
+ seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
/* render them all */
- buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
- buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
- buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
- buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
- buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
-
- return buffer;
+ render_sigset_t(m, "SigPnd:\t", &pending);
+ render_sigset_t(m, "ShdPnd:\t", &shpending);
+ render_sigset_t(m, "SigBlk:\t", &blocked);
+ render_sigset_t(m, "SigIgn:\t", &ignored);
+ render_sigset_t(m, "SigCgt:\t", &caught);
}
-static inline char *task_cap(struct task_struct *p, char *buffer)
+static void render_cap_t(struct seq_file *m, const char *header,
+ kernel_cap_t *a)
{
- return buffer + sprintf(buffer, "CapInh:\t%016x\n"
- "CapPrm:\t%016x\n"
- "CapEff:\t%016x\n",
- cap_t(p->cap_inheritable),
- cap_t(p->cap_permitted),
- cap_t(p->cap_effective));
+ unsigned __capi;
+
+ seq_printf(m, "%s", header);
+ CAP_FOR_EACH_U32(__capi) {
+ seq_printf(m, "%08x",
+ a->cap[(_KERNEL_CAPABILITY_U32S-1) - __capi]);
+ }
+ seq_printf(m, "\n");
}
-int proc_pid_status(struct task_struct *task, char * buffer)
+static inline void task_cap(struct seq_file *m, struct task_struct *p)
{
- char * orig = buffer;
- struct mm_struct *mm = get_task_mm(task);
+ const struct cred *cred;
+ kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset;
- buffer = task_name(task, buffer);
- buffer = task_state(task, buffer);
-
- if (mm) {
- buffer = task_mem(mm, buffer);
- mmput(mm);
- }
- buffer = task_sig(task, buffer);
- buffer = task_cap(task, buffer);
- buffer = cpuset_task_status_allowed(task, buffer);
-#if defined(CONFIG_S390)
- buffer = task_show_regs(task, buffer);
-#endif
- return buffer - orig;
+ rcu_read_lock();
+ cred = __task_cred(p);
+ cap_inheritable = cred->cap_inheritable;
+ cap_permitted = cred->cap_permitted;
+ cap_effective = cred->cap_effective;
+ cap_bset = cred->cap_bset;
+ rcu_read_unlock();
+
+ render_cap_t(m, "CapInh:\t", &cap_inheritable);
+ render_cap_t(m, "CapPrm:\t", &cap_permitted);
+ render_cap_t(m, "CapEff:\t", &cap_effective);
+ render_cap_t(m, "CapBnd:\t", &cap_bset);
}
-static clock_t task_utime(struct task_struct *p)
+static inline void task_context_switch_counts(struct seq_file *m,
+ struct task_struct *p)
{
- clock_t utime = cputime_to_clock_t(p->utime),
- total = utime + cputime_to_clock_t(p->stime);
- u64 temp;
-
- /*
- * Use CFS's precise accounting:
- */
- temp = (u64)nsec_to_clock_t(p->se.sum_exec_runtime);
-
- if (total) {
- temp *= utime;
- do_div(temp, total);
- }
- utime = (clock_t)temp;
+ seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
+ "nonvoluntary_ctxt_switches:\t%lu\n",
+ p->nvcsw,
+ p->nivcsw);
+}
- return utime;
+static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
+{
+ seq_printf(m, "Cpus_allowed:\t");
+ seq_cpumask(m, &task->cpus_allowed);
+ seq_printf(m, "\n");
+ seq_printf(m, "Cpus_allowed_list:\t");
+ seq_cpumask_list(m, &task->cpus_allowed);
+ seq_printf(m, "\n");
}
-static clock_t task_stime(struct task_struct *p)
+int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
{
- clock_t stime = cputime_to_clock_t(p->stime);
+ struct mm_struct *mm = get_task_mm(task);
- /*
- * Use CFS's precise accounting. (we subtract utime from
- * the total, to make sure the total observed by userspace
- * grows monotonically - apps rely on that):
- */
- stime = nsec_to_clock_t(p->se.sum_exec_runtime) - task_utime(p);
+ task_name(m, task);
+ task_state(m, ns, pid, task);
- return stime;
+ if (mm) {
+ task_mem(m, mm);
+ mmput(mm);
+ }
+ task_sig(m, task);
+ task_cap(m, task);
+ task_cpus_allowed(m, task);
+ cpuset_task_status_allowed(m, task);
+#if defined(CONFIG_S390)
+ task_show_regs(m, task);
+#endif
+ task_context_switch_counts(m, task);
+ return 0;
}
-
-static int do_task_stat(struct task_struct *task, char * buffer, int whole)
+static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task, int whole)
{
unsigned long vsize, eip, esp, wchan = ~0UL;
long priority, nice;
int tty_pgrp = -1, tty_nr = 0;
sigset_t sigign, sigcatch;
char state;
- int res;
- pid_t ppid = 0, pgid = -1, sid = -1;
+ pid_t ppid = 0, pgid = -1, sid = -1;
int num_threads = 0;
+ int permitted;
struct mm_struct *mm;
unsigned long long start_time;
unsigned long cmin_flt = 0, cmaj_flt = 0;
unsigned long min_flt = 0, maj_flt = 0;
- cputime_t cutime, cstime;
- clock_t utime, stime;
+ cputime_t cutime, cstime, utime, stime;
+ cputime_t cgtime, gtime;
unsigned long rsslim = 0;
char tcomm[sizeof(task->comm)];
unsigned long flags;
state = *get_task_state(task);
vsize = eip = esp = 0;
+ permitted = ptrace_may_access(task, PTRACE_MODE_READ);
mm = get_task_mm(task);
if (mm) {
vsize = task_vsize(mm);
- eip = KSTK_EIP(task);
- esp = KSTK_ESP(task);
+ if (permitted) {
+ eip = KSTK_EIP(task);
+ esp = KSTK_ESP(task);
+ }
}
get_task_comm(tcomm, task);
sigemptyset(&sigign);
sigemptyset(&sigcatch);
- cutime = cstime = cputime_zero;
- utime = stime = 0;
+ cutime = cstime = utime = stime = cputime_zero;
+ cgtime = gtime = cputime_zero;
- rcu_read_lock();
if (lock_task_sighand(task, &flags)) {
struct signal_struct *sig = task->signal;
if (sig->tty) {
- tty_pgrp = pid_nr(sig->tty->pgrp);
+ struct pid *pgrp = tty_get_pgrp(sig->tty);
+ tty_pgrp = pid_nr_ns(pgrp, ns);
+ put_pid(pgrp);
tty_nr = new_encode_dev(tty_devnum(sig->tty));
}
cmaj_flt = sig->cmaj_flt;
cutime = sig->cutime;
cstime = sig->cstime;
- rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;
+ cgtime = sig->cgtime;
+ rsslim = ACCESS_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur);
/* add up live thread stats at the group level */
if (whole) {
do {
min_flt += t->min_flt;
maj_flt += t->maj_flt;
- utime += task_utime(t);
- stime += task_stime(t);
+ gtime = cputime_add(gtime, t->gtime);
t = next_thread(t);
} while (t != task);
min_flt += sig->min_flt;
maj_flt += sig->maj_flt;
- utime += cputime_to_clock_t(sig->utime);
- stime += cputime_to_clock_t(sig->stime);
+ thread_group_times(task, &utime, &stime);
+ gtime = cputime_add(gtime, sig->gtime);
}
- sid = signal_session(sig);
- pgid = process_group(task);
- ppid = rcu_dereference(task->real_parent)->tgid;
+ sid = task_session_nr_ns(task, ns);
+ ppid = task_tgid_nr_ns(task->real_parent, ns);
+ pgid = task_pgrp_nr_ns(task, ns);
unlock_task_sighand(task, &flags);
}
- rcu_read_unlock();
- if (!whole || num_threads<2)
+ if (permitted && (!whole || num_threads < 2))
wchan = get_wchan(task);
if (!whole) {
min_flt = task->min_flt;
maj_flt = task->maj_flt;
- utime = task_utime(task);
- stime = task_stime(task);
+ task_times(task, &utime, &stime);
+ gtime = task->gtime;
}
/* scale priority and nice values from timeslices to -20..20 */
/* Temporary variable needed for gcc-2.96 */
/* convert timespec -> nsec*/
- start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
- + task->start_time.tv_nsec;
+ start_time =
+ (unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC
+ + task->real_start_time.tv_nsec;
/* convert nsec -> ticks */
start_time = nsec_to_clock_t(start_time);
- res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %u %lu \
+ seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %lu \
%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
-%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu\n",
- task->pid,
+%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
+ pid_nr_ns(pid, ns),
tcomm,
state,
ppid,
cmin_flt,
maj_flt,
cmaj_flt,
- utime,
- stime,
+ cputime_to_clock_t(utime),
+ cputime_to_clock_t(stime),
cputime_to_clock_t(cutime),
cputime_to_clock_t(cstime),
priority,
start_time,
vsize,
mm ? get_mm_rss(mm) : 0,
- rsslim,
+ rsslim,
mm ? mm->start_code : 0,
mm ? mm->end_code : 0,
- mm ? mm->start_stack : 0,
+ (permitted && mm) ? task->stack_start : 0,
esp,
eip,
/* The signal information here is obsolete.
task_cpu(task),
task->rt_priority,
task->policy,
- (unsigned long long)delayacct_blkio_ticks(task));
- if(mm)
+ (unsigned long long)delayacct_blkio_ticks(task),
+ cputime_to_clock_t(gtime),
+ cputime_to_clock_t(cgtime));
+ if (mm)
mmput(mm);
- return res;
+ return 0;
}
-int proc_tid_stat(struct task_struct *task, char * buffer)
+int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
{
- return do_task_stat(task, buffer, 0);
+ return do_task_stat(m, ns, pid, task, 0);
}
-int proc_tgid_stat(struct task_struct *task, char * buffer)
+int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
{
- return do_task_stat(task, buffer, 1);
+ return do_task_stat(m, ns, pid, task, 1);
}
-int proc_pid_statm(struct task_struct *task, char *buffer)
+int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
{
int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
struct mm_struct *mm = get_task_mm(task);
-
+
if (mm) {
size = task_statm(mm, &shared, &text, &data, &resident);
mmput(mm);
}
+ seq_printf(m, "%d %d %d %d %d %d %d\n",
+ size, resident, shared, text, lib, data, 0);
- return sprintf(buffer,"%d %d %d %d %d %d %d\n",
- size, resident, shared, text, lib, data, 0);
+ return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff