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| author | Pavel Emelyanov <xemul@openvz.org> | 2008-02-08 04:21:52 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-08 09:22:41 -0800 |
| commit | 8dc86af00612e5ccff3384c17575362a3f2a2ca0 (patch) | |
| tree | 04ed08d10cc99d4a283c8ccac078c4ac544b7b94 | |
| parent | 20a8143eaa3300a58326156eaf43e03db0fd2cb6 (diff) | |
| download | kernel-common-8dc86af00612e5ccff3384c17575362a3f2a2ca0.tar.gz kernel-common-8dc86af00612e5ccff3384c17575362a3f2a2ca0.tar.bz2 kernel-common-8dc86af00612e5ccff3384c17575362a3f2a2ca0.zip | |
Use find_task_by_vpid in posix timers
All the functions that need to lookup a task by pid in posix timers obtain
this pid from a user space, and thus this value refers to a task in the same
namespace, as the current task lives in.
So the proper behavior is to call find_task_by_vpid() here.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | kernel/posix-cpu-timers.c | 8 | ||||
| -rw-r--r-- | kernel/posix-timers.c | 2 |
2 files changed, 5 insertions, 5 deletions
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c index 0b7c82ac467e..2eae91f954ca 100644 --- a/kernel/posix-cpu-timers.c +++ b/kernel/posix-cpu-timers.c @@ -20,7 +20,7 @@ static int check_clock(const clockid_t which_clock) return 0; read_lock(&tasklist_lock); - p = find_task_by_pid(pid); + p = find_task_by_vpid(pid); if (!p || !(CPUCLOCK_PERTHREAD(which_clock) ? same_thread_group(p, current) : thread_group_leader(p))) { error = -EINVAL; @@ -305,7 +305,7 @@ int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp) */ struct task_struct *p; rcu_read_lock(); - p = find_task_by_pid(pid); + p = find_task_by_vpid(pid); if (p) { if (CPUCLOCK_PERTHREAD(which_clock)) { if (same_thread_group(p, current)) { @@ -354,7 +354,7 @@ int posix_cpu_timer_create(struct k_itimer *new_timer) if (pid == 0) { p = current; } else { - p = find_task_by_pid(pid); + p = find_task_by_vpid(pid); if (p && !same_thread_group(p, current)) p = NULL; } @@ -362,7 +362,7 @@ int posix_cpu_timer_create(struct k_itimer *new_timer) if (pid == 0) { p = current->group_leader; } else { - p = find_task_by_pid(pid); + p = find_task_by_vpid(pid); if (p && !thread_group_leader(p)) p = NULL; } diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c index 122d5c787fe2..ce268966007d 100644 --- a/kernel/posix-timers.c +++ b/kernel/posix-timers.c @@ -404,7 +404,7 @@ static struct task_struct * good_sigevent(sigevent_t * event) struct task_struct *rtn = current->group_leader; if ((event->sigev_notify & SIGEV_THREAD_ID ) && - (!(rtn = find_task_by_pid(event->sigev_notify_thread_id)) || + (!(rtn = find_task_by_vpid(event->sigev_notify_thread_id)) || !same_thread_group(rtn, current) || (event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_SIGNAL)) return NULL; |