From d35abdb28824cf74f0a106a0f9c6f3ff700a35bf Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 30 Jun 2012 11:55:24 +0400 Subject: [PATCH] hold task_lock around checks in keyctl Signed-off-by: Al Viro --- security/keys/keyctl.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index 0291b3f9397c..f1b59ae39d7e 100644 --- a/security/keys/keyctl.c +++ b/security/keys/keyctl.c @@ -1486,6 +1486,7 @@ long keyctl_session_to_parent(void) oldwork = NULL; parent = me->real_parent; + task_lock(parent); /* the parent mustn't be init and mustn't be a kernel thread */ if (parent->pid <= 1 || !parent->mm) goto unlock; @@ -1529,6 +1530,7 @@ long keyctl_session_to_parent(void) if (!ret) newwork = NULL; unlock: + task_unlock(parent); write_unlock_irq(&tasklist_lock); rcu_read_unlock(); if (oldwork) -- GitLab