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Date: Wed, 28 Jan 2015 14:20:47 -0800 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Oleg Nesterov <oleg@...hat.com>, Aaron Tomlin <atomlin@...hat.com>, Pavel Emelyanov <xemul@...allels.com>, Serge Hallyn <serge.hallyn@...ntu.com>, Sterling Alexander <stalexan@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.13.y-ckt 104/139] exit: pidns: alloc_pid() leaks pid_namespace if child_reaper is exiting 3.13.11-ckt15 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Oleg Nesterov <oleg@...hat.com> 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@...hat.com> Reviewed-by: "Eric W. Biederman" <ebiederm@...ssion.com> Cc: Aaron Tomlin <atomlin@...hat.com> Cc: Pavel Emelyanov <xemul@...allels.com> Cc: Serge Hallyn <serge.hallyn@...ntu.com> Cc: Sterling Alexander <stalexan@...hat.com> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- kernel/pid.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/pid.c b/kernel/pid.c index 9b9a266..82430c8 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); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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