2.6.32-longterm review patch. If anyone has any objections, please let me know.
------------------ TASK_STOPPED/TRACED task From: Oleg Nesterov <[email protected]> wake_up_process() should be never used to wakeup a TASK_STOPPED/TRACED task CVE-2013-0871 BugLink: http://bugs.launchpad.net/bugs/1129192 wake_up_process() should never wakeup a TASK_STOPPED/TRACED task. Change it to use TASK_NORMAL and add the WARN_ON(). TASK_ALL has no other users, probably can be killed. Signed-off-by: Oleg Nesterov <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> (backported from commit 9067ac85d533651b98c2ff903182a20cbb361fcb) Conflicts: kernel/sched/core.c Signed-off-by: Luis Henriques <[email protected]> Acked-by: Colin King <[email protected]> Signed-off-by: Tim Gardner <[email protected]> Signed-off-by: Willy Tarreau <[email protected]> --- kernel/sched.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/sched.c b/kernel/sched.c index 0591df8..42bf6a6 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -2618,7 +2618,8 @@ out: */ int wake_up_process(struct task_struct *p) { - return try_to_wake_up(p, TASK_ALL, 0); + WARN_ON(task_is_stopped_or_traced(p)); + return try_to_wake_up(p, TASK_NORMAL, 0); } EXPORT_SYMBOL(wake_up_process); -- 1.7.12.2.21.g234cd45.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
