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ptrace: ptrace_attach: fix the usage of ->cred_exec_mutex

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ptrace_attach() needs task->cred_exec_mutex, not current->cred_exec_mutex.

Signed-off-by: Oleg Nesterov <[email protected]>
Acked-by: Roland McGrath <[email protected]>
Acked-by: David Howells <[email protected]>
Signed-off-by: James Morris <[email protected]>
This commit is contained in:
Oleg Nesterov 2009-04-27 01:41:34 +02:00 • committed by James Morris
commit cad81bc252
1 changed files with 2 additions and 2 deletions
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4
kernel/ptrace.c
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@ -188,7 +188,7 @@ int ptrace_attach(struct task_struct *task)
/* Protect exec's credential calculations against our interference;
* SUID, SGID and LSM creds get determined differently under ptrace.
*/
retval = mutex_lock_interruptible(&current->cred_exec_mutex);
retval = mutex_lock_interruptible(&task->cred_exec_mutex);
if (retval < 0)
goto out;
@ -232,7 +232,7 @@ repeat:
bad:
write_unlock_irqrestore(&tasklist_lock, flags);
task_unlock(task);
mutex_unlock(&current->cred_exec_mutex);
mutex_unlock(&task->cred_exec_mutex);
out:
return retval;
}