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[PATCH] UML: tty locking

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Ensure current->signal->tty doesn't get freed during log_exec().

Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Alan Cox 2006-09-25 23:33:08 -07:00 • committed by Linus Torvalds
parent 75e29b18d9
commit b1fc0b1f21
1 changed files with 3 additions and 1 deletions
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4
arch/um/kernel/exec.c
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@ -41,9 +41,11 @@ static long execve1(char *file, char __user * __user *argv,
long error; long error;
#ifdef CONFIG_TTY_LOG #ifdef CONFIG_TTY_LOG
task_lock(current); mutex_lock(&tty_mutex);
task_lock(current); /* FIXME: is this needed ? */
log_exec(argv, current->signal->tty); log_exec(argv, current->signal->tty);
task_unlock(current); task_unlock(current);
mutex_unlock(&tty_mutex);
#endif #endif
error = do_execve(file, argv, env, &current->thread.regs); error = do_execve(file, argv, env, &current->thread.regs);
if (error == 0){ if (error == 0){