diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2007-06-23 11:48:40 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-08-04 09:10:25 -0700 |
| commit | 8e9a9197b255bbbed3e674a5d1e6b6516c1f027b (patch) | |
| tree | f6c2e4b35e49b23a758e76aef42625e5f8abc8e0 | |
| parent | cdd2bd2e66111c075f2fe917e206ccb2835f9359 (diff) | |
FUTEX: Restore the dropped ERSCH fix
The return value of futex_find_get_task() needs to be -ESRCH in case
that the search fails. This was part of the original futex fixes and
got accidentally dropped, when the futex-tidy-up patch was split out.
Results in a NULL pointer dereference in case the search fails.
Restore it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ulrich Drepper <drepper@redhat.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | kernel/futex.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/kernel/futex.c b/kernel/futex.c index c132532b2eed..480943687456 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -390,14 +390,12 @@ static struct task_struct * futex_find_get_task(pid_t pid) rcu_read_lock(); p = find_task_by_pid(pid); - if (!p) - goto out_unlock; - if ((current->euid != p->euid) && (current->euid != p->uid)) { - p = NULL; - goto out_unlock; - } - get_task_struct(p); -out_unlock: + + if (!p || ((current->euid != p->euid) && (current->euid != p->uid))) + p = ERR_PTR(-ESRCH); + else + get_task_struct(p); + rcu_read_unlock(); return p; |