setpgid(child) fails if the child was forked by sub-thread
authorOleg Nesterov <oleg@tv-sign.ru>
Fri, 31 Aug 2007 06:56:27 +0000 (23:56 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Fri, 31 Aug 2007 08:42:22 +0000 (01:42 -0700)
commitb07e35f94a7b6a059f889b904529ee907dc0634d
tree0d6178552b4232fa4ea7c3d49aa4710873babc11
parent5d540fb71552b9f2c542bea967200c48be2d8ef6
setpgid(child) fails if the child was forked by sub-thread

Spotted by Marcin Kowalczyk <qrczak@knm.org.pl>.

sys_setpgid(child) fails if the child was forked by sub-thread.

Fix the "is it our child" check. The previous commit
ee0acf90d320c29916ba8c5c1b2e908d81f5057d was not complete.

(this patch asks for the new same_thread_group() helper, but mainline doesn't
 have it yet).

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: <stable@kernel.org>
Tested-by: "Marcin 'Qrczak' Kowalczyk" <qrczak@knm.org.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/sys.c