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Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
[deliverable/linux.git]
/
kernel
/
signal.c
diff --git
a/kernel/signal.c
b/kernel/signal.c
index a4077e90f19fcba4776af7f62a9ed2d4ddb9de03..40b76e351e64aae9cb92039d3d77332afac50d51 100644
(file)
--- a/
kernel/signal.c
+++ b/
kernel/signal.c
@@
-1263,6
+1263,10
@@
struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
struct sighand_struct *sighand;
for (;;) {
+ /*
+ * Disable interrupts early to avoid deadlocks.
+ * See rcu_read_unlock() comment header for details.
+ */
local_irq_save(*flags);
rcu_read_lock();
sighand = rcu_dereference(tsk->sighand);
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