diff options
| author |   KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2010-10-27 15:34:08 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-27 18:03:12 -0700 |
| commit | 9b1bf12d5d51bca178dea21b04a0805e29d60cf1 (patch) | |
| tree | 902a2c0e5882a2152da59a589958d6426dc84643 /include/linux/tracehook.h | |
| parent | signals: annotate lock context change on ptrace_stop() (diff) | |
| download | wireguard-linux-9b1bf12d5d51bca178dea21b04a0805e29d60cf1.tar.xz wireguard-linux-9b1bf12d5d51bca178dea21b04a0805e29d60cf1.zip | |
signals: move cred_guard_mutex from task_struct to signal_struct
Oleg Nesterov pointed out we have to prevent multiple-threads-inside-exec
itself and we can reuse ->cred_guard_mutex for it. Yes, concurrent
execve() has no worth.
Let's move ->cred_guard_mutex from task_struct to signal_struct. It
naturally prevent multiple-threads-inside-exec.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/tracehook.h')
| -rw-r--r-- | include/linux/tracehook.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h index 10db0102a890..3a2e66d88a32 100644 --- a/include/linux/tracehook.h +++ b/include/linux/tracehook.h @@ -150,7 +150,7 @@ static inline void tracehook_report_syscall_exit(struct pt_regs *regs, int step) * * Return %LSM_UNSAFE_* bits applied to an exec because of tracing. * - * @task->cred_guard_mutex is held by the caller through the do_execve(). + * @task->signal->cred_guard_mutex is held by the caller through the do_execve(). */ static inline int tracehook_unsafe_exec(struct task_struct *task) { |