From: Oleg Nesterov <oleg@tv-sign.ru>
Date: Sun, 30 Oct 2005 23:02:54 +0000 (-0800)
Subject: [PATCH] fix de_thread() vs do_coredump() deadlock
X-Git-Tag: v2.6.15-rc1~59^2~15^2~64
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1291cf4163d21f1b4999d697cbf68d38e7151c28;p=pandora-kernel.git

[PATCH] fix de_thread() vs do_coredump() deadlock

de_thread() sends SIGKILL to all sub-threads and waits them to die in 'D'
state.  It is possible that one of the threads already dequeued coredump
signal.  When de_thread() unlocks ->sighand->lock that thread can enter
do_coredump()->coredump_wait() and cause a deadlock.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

Reading git-diff-tree failed