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| author | Takashi Iwai <tiwai@suse.de> | 2009-05-29 11:46:10 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-05-29 11:46:10 +0200 |
| commit | e93721a70263afefbac781f575bfe851c6f95d84 (patch) | |
| tree | ab359f12a0688802aa99339bae82c51763dae9f6 /fs/proc/array.c | |
| parent | ae1ec5e1e97f67d41e641a73380129e5905e41cc (diff) | |
| parent | c87d9732004b3f8fd82d729f12ccfb96c0df279e (diff) | |
| download | kernel-crypto-e93721a70263afefbac781f575bfe851c6f95d84.tar.gz kernel-crypto-e93721a70263afefbac781f575bfe851c6f95d84.tar.xz kernel-crypto-e93721a70263afefbac781f575bfe851c6f95d84.zip | |
Merge branch 'fix/pcm-jiffies-check' into topic/pcm-jiffies-check
Diffstat (limited to 'fs/proc/array.c')
| -rw-r--r-- | fs/proc/array.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index 7e4877d9dcb..725a650bbbb 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -80,6 +80,7 @@ #include <linux/delayacct.h> #include <linux/seq_file.h> #include <linux/pid_namespace.h> +#include <linux/ptrace.h> #include <linux/tracehook.h> #include <asm/pgtable.h> @@ -352,6 +353,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, char state; 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; @@ -364,11 +366,14 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, 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); @@ -424,7 +429,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, unlock_task_sighand(task, &flags); } - if (!whole || num_threads < 2) + if (permitted && (!whole || num_threads < 2)) wchan = get_wchan(task); if (!whole) { min_flt = task->min_flt; @@ -476,7 +481,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, rsslim, mm ? mm->start_code : 0, mm ? mm->end_code : 0, - mm ? mm->start_stack : 0, + (permitted && mm) ? mm->start_stack : 0, esp, eip, /* The signal information here is obsolete. |