Oleg Nesterov d68b46fe16
vfork: make it killable ...
Make vfork() killable.
Change do_fork(CLONE_VFORK) to do wait_for_completion_killable(). If it
fails we do not return to the user-mode and never touch the memory shared
with our child.
However, in this case we should clear child->vfork_done before return, we
use task_lock() in do_fork()->wait_for_vfork_done() and
complete_vfork_done() to serialize with each other.
Note: now that we use task_lock() we don't really need completion, we
could turn task->vfork_done into "task_struct *wake_up_me" but this needs
some complications.
NOTE: this and the next patches do not affect in-kernel users of
CLONE_VFORK, kernel threads run with all signals ignored including
SIGKILL/SIGSTOP.
However this is obviously the user-visible change. Not only a fatal
signal can kill the vforking parent, a sub-thread can do execve or
exit_group() and kill the thread sleeping in vfork().
Signed-off-by: Oleg Nesterov <oleg@redhat.com >
Acked-by: Tejun Heo <tj@kernel.org >
Signed-off-by: Andrew Morton <akpm@linux-foundation.org >
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org >
2012-03-05 15:49:42 -08:00
2012-01-17 18:40:24 -08:00
2012-01-17 09:54:08 -05:00
2012-01-04 17:30:20 -02:00
2012-01-09 00:37:40 +01:00
2012-01-13 09:32:20 +10:30
2012-02-03 19:03:44 +01:00
2012-01-22 15:08:43 -05:00
2012-02-13 20:39:05 -05:00
2012-02-04 07:17:47 -08:00
2012-01-16 14:01:23 +01:00
2012-02-21 13:29:06 +01:00
2012-01-09 14:21:03 -08:00
2012-01-06 05:22:21 +04:00
2012-01-03 20:20:01 +00:00
2012-01-14 12:26:41 -08:00
2012-02-10 14:24:31 -08:00
2012-01-17 04:35:20 -05:00
2012-01-18 15:51:48 -08:00
2012-01-08 19:14:59 -05:00
2012-01-17 16:17:03 -05:00
2012-02-06 15:15:20 -08:00
2012-01-13 08:15:33 +01:00
2012-02-18 15:24:05 -08:00
2012-02-07 07:51:30 +01:00
2012-01-14 18:36:33 -08:00
2012-02-08 20:03:14 +01:00
2012-01-09 12:59:24 -08:00
2012-02-26 09:44:55 -08:00
2012-01-10 16:30:42 -08:00
2012-01-10 16:30:42 -08:00
2012-01-03 22:54:57 -05:00
2012-01-13 09:32:20 +10:30
2012-01-07 12:03:30 -08:00
2012-01-18 15:51:48 -08:00
2012-01-12 20:13:11 -08:00
2012-01-05 18:52:59 -05:00
2012-03-04 15:51:42 -08:00
2012-01-08 12:19:57 -08:00
2012-01-24 10:47:41 -08:00
2012-02-20 19:46:36 +11:00
2012-01-04 08:56:31 -06:00
2012-01-06 10:20:21 +00:00
2012-02-08 09:19:42 +01:00
2012-01-04 14:10:28 -05:00
2012-01-12 20:13:04 -08:00
2012-01-03 22:54:58 -05:00
2012-01-29 20:35:52 +01:00
2012-02-13 20:45:38 -05:00
2012-01-07 17:26:49 -05:00
2012-01-03 22:54:55 -05:00
2012-01-10 16:30:43 -08:00
2012-01-11 09:23:05 +00:00
2012-02-01 09:13:11 -08:00
2012-01-09 11:24:59 +01:00
2012-01-12 20:13:08 -08:00
2012-02-02 14:35:12 -05:00
2012-01-06 11:42:52 -08:00
2012-01-03 22:54:56 -05:00
2012-02-21 16:56:45 -05:00
2012-01-24 15:51:00 -05:00
2012-01-11 12:56:06 -08:00
2012-01-09 12:59:24 -08:00
2012-01-13 09:32:18 +10:30
2012-02-07 07:51:30 +01:00
2012-01-09 13:06:28 +01:00
2012-01-03 22:55:17 -05:00
2012-01-03 22:54:55 -05:00
2012-01-09 13:52:09 +01:00
2012-01-12 20:13:03 -08:00
2012-01-23 08:38:48 -08:00
2012-01-19 16:17:35 +11:00
2012-03-05 15:49:42 -08:00
2012-01-17 15:40:51 -08:00
2012-01-10 16:30:49 -08:00
2012-01-12 20:13:03 -08:00
2012-02-02 15:43:40 -08:00
2012-01-12 20:13:07 -08:00
2012-01-10 16:30:45 -08:00
2012-01-23 08:38:47 -08:00
2012-01-23 08:38:47 -08:00
2012-01-13 10:12:23 -08:00
2012-01-12 20:13:10 -08:00
2012-01-12 20:13:03 -08:00
2012-01-11 19:12:10 -08:00
2012-01-12 20:13:10 -08:00
2012-01-03 22:57:13 -05:00
2012-01-20 17:38:58 +00:00
2012-01-13 09:32:14 +10:30
2012-01-13 09:32:28 +10:30
2012-01-03 22:57:12 -05:00
2012-02-02 00:23:14 +11:00
2012-01-06 12:10:25 -08:00
2012-01-09 14:46:52 -08:00
2012-01-04 14:30:43 -05:00
2012-01-05 11:59:18 -05:00
2012-01-03 22:52:34 -05:00
2012-01-07 13:22:46 -05:00
2012-02-03 18:50:34 -05:00
2012-01-07 12:18:52 -08:00
2012-01-12 20:13:06 -08:00
2012-01-12 20:13:07 -08:00
2012-01-10 16:30:42 -08:00
2012-01-12 20:13:10 -08:00
2012-01-06 12:11:40 -08:00
2012-01-11 18:50:26 -08:00
2012-01-06 12:10:26 -08:00
2012-01-06 12:15:21 -08:00
2012-01-27 12:06:39 +01:00
2012-01-12 15:23:04 -08:00
2012-01-10 16:30:54 -08:00
2012-01-12 20:05:28 -08:00
2012-01-08 13:10:57 -08:00
2012-02-04 22:23:17 +01:00
2012-01-04 09:09:35 +04:00
2012-01-12 20:13:13 -08:00
2012-01-10 16:30:54 -08:00
2012-02-01 16:53:46 +08:00
2012-01-17 16:41:31 -08:00
2012-01-12 13:09:09 +01:00
2012-01-12 20:13:12 -08:00
2012-01-03 22:55:07 -05:00
2012-03-02 11:38:15 -08:00
2012-01-06 23:20:13 -05:00
2012-01-06 23:20:13 -05:00
2012-01-03 22:54:56 -05:00
2012-01-22 15:08:46 -05:00
2012-01-12 20:13:06 -08:00
2012-02-21 16:56:45 -05:00
2012-01-06 06:13:35 +04:00
2012-03-05 15:49:42 -08:00
2012-01-14 18:36:33 -08:00
2012-01-03 22:52:40 -05:00
2012-01-14 13:05:21 -08:00
2012-02-01 22:23:53 +05:30
2012-01-09 09:33:57 +09:00
2012-01-23 08:38:48 -08:00
2012-01-10 16:30:54 -08:00
2012-02-24 11:42:50 -08:00
2012-02-23 16:50:45 -05:00
2012-01-09 14:19:33 -08:00
2012-01-03 20:23:18 -05:00
2012-01-22 15:08:44 -05:00
2012-01-19 23:25:33 +01:00
2012-01-23 08:38:48 -08:00
2012-02-21 17:24:20 -08:00
2012-01-03 22:55:12 -05:00
2012-01-03 22:54:56 -05:00
2012-01-23 03:15:25 -05:00
2012-01-17 10:30:38 -08:00
2012-01-08 13:21:22 -08:00
2012-01-04 22:19:55 -08:00
2012-01-24 12:25:14 -08:00
2012-01-15 12:49:56 -08:00
2012-01-12 15:44:42 +10:30
2012-01-12 15:44:44 +10:30
2012-01-06 15:22:04 +01:00
2012-01-10 16:30:54 -08:00
2012-01-10 16:59:59 -08:00
d68b46fe16