From 2c9ca2baf3f368a2b747124d39bf31b779eb7571 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Mon, 27 Apr 2009 01:41:34 +0200 Subject: [PATCH] ptrace: ptrace_attach: fix the usage of ->cred_exec_mutex commit cad81bc2529ab8c62b6fdc83a1c0c7f4a87209eb upstream. ptrace_attach() needs task->cred_exec_mutex, not current->cred_exec_mutex. Signed-off-by: Oleg Nesterov Acked-by: Roland McGrath Acked-by: David Howells Signed-off-by: James Morris Signed-off-by: Greg Kroah-Hartman --- kernel/ptrace.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/ptrace.c b/kernel/ptrace.c index c9cf48b21f052..dc3b98ef10bb0 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -186,7 +186,7 @@ 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(¤t->cred_exec_mutex); + retval = mutex_lock_interruptible(&task->cred_exec_mutex); if (retval < 0) goto out; @@ -230,7 +230,7 @@ repeat: bad: write_unlock_irqrestore(&tasklist_lock, flags); task_unlock(task); - mutex_unlock(¤t->cred_exec_mutex); + mutex_unlock(&task->cred_exec_mutex); out: return retval; } -- 2.47.2