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| author | Mandeep Singh Baines <msb@chromium.org> | 2011-12-08 14:34:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-12-09 07:50:29 -0800 |
| commit | 031af165b1cd295ef04d2bfbcae9bc3cb9180735 (patch) | |
| tree | fc5abaa84eb1135cae41e8ab0d3356171fc0a760 /kernel | |
| parent | 1cee22b7f385b6c4f716846203a96e1f302132aa (diff) | |
| download | lwn-031af165b1cd295ef04d2bfbcae9bc3cb9180735.tar.gz lwn-031af165b1cd295ef04d2bfbcae9bc3cb9180735.zip | |
sys_getppid: add missing rcu_dereference
In order to safely dereference current->real_parent inside an
rcu_read_lock, we need an rcu_dereference.
Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/timer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index dbaa62422b13..9c3c62b0c4bc 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1368,7 +1368,7 @@ SYSCALL_DEFINE0(getppid) int pid; rcu_read_lock(); - pid = task_tgid_vnr(current->real_parent); + pid = task_tgid_vnr(rcu_dereference(current->real_parent)); rcu_read_unlock(); return pid; |