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| author | Oleg Nesterov <oleg@redhat.com> | 2014-12-10 15:55:25 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-08 10:27:48 -0800 |
| commit | 257e1f15421e5bbb57448fbec69e9a829a66d605 (patch) | |
| tree | 49c90433b5c0d20fe8d254f27ae169031ee79214 | |
| parent | 1a00c9064b5abf1bff2393a59b910381b6e48303 (diff) | |
| download | linux-stable-257e1f15421e5bbb57448fbec69e9a829a66d605.tar.gz linux-stable-257e1f15421e5bbb57448fbec69e9a829a66d605.tar.bz2 linux-stable-257e1f15421e5bbb57448fbec69e9a829a66d605.zip | |
exit: pidns: alloc_pid() leaks pid_namespace if child_reaper is exiting
commit 24c037ebf5723d4d9ab0996433cee4f96c292a4d upstream.
alloc_pid() does get_pid_ns() beforehand but forgets to put_pid_ns() if it
fails because disable_pid_allocation() was called by the exiting
child_reaper.
We could simply move get_pid_ns() down to successful return, but this fix
tries to be as trivial as possible.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Serge Hallyn <serge.hallyn@ubuntu.com>
Cc: Sterling Alexander <stalexan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | kernel/pid.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/pid.c b/kernel/pid.c index 9b9a26698144..82430c858d69 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -341,6 +341,8 @@ out: out_unlock: spin_unlock_irq(&pidmap_lock); + put_pid_ns(ns); + out_free: while (++i <= ns->level) free_pidmap(pid->numbers + i); |