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authorEric W. Biederman <ebiederm@xmission.com>2007-02-12 00:52:58 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 09:48:32 -0800
commit3e7cd6c413c9e6fbb5e1ee2acdadb4ababd2d474 (patch)
treede97d00794ee0c787b6c551a91e33fb1faa48caa /kernel/signal.c
parent0475ac0845f9295bc5f69af45f58dff2c104c8d1 (diff)
[PATCH] pid: replace is_orphaned_pgrp with is_current_pgrp_orphaned
Every call to is_orphaned_pgrp passed in process_group(current) which is racy with respect to another thread changing our process group. It didn't bite us because we were dealing with integers and the worse we would get would be a stale answer. In switching the checks to use struct pid to be a little more efficient and prepare the way for pid namespaces this race became apparent. So I simplified the calls to the more specialized is_current_pgrp_orphaned so I didn't have to worry about making logic changes to avoid the race. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index de66def7164..a9b679ed795 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1909,7 +1909,7 @@ relock:
/* signals can be posted during this window */
- if (is_orphaned_pgrp(process_group(current)))
+ if (is_current_pgrp_orphaned())
goto relock;
spin_lock_irq(&current->sighand->siglock);