diff options
| author | Al Viro | 2012-06-30 11:55:24 +0400 |
|---|---|---|
| committer | Al Viro | 2012-07-22 23:58:01 +0400 |
| commit | d35abdb28824cf74f0a106a0f9c6f3ff700a35bf (patch) | |
| tree | 860bbe5c9e2d42293698cd93c32299b2c6dac5a2 | |
| parent | 6120d3dbb1220792ebea88cd475e1ec8f8620a93 (diff) | |
hold task_lock around checks in keyctl
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | security/keys/keyctl.c | 2 |
1 files changed, 2 insertions, 0 deletions
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) |