linux-kernel - Re: [syzbot] possible deadlock in input

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Message-Id: <20240420061505.62849-1-aha310510@gmail.com>
Date: Sat, 20 Apr 2024 15:15:05 +0900
From: Jeongjun Park <aha310510@...il.com>
To: syzbot+d4c06e848a1c1f9f726f@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] possible deadlock in input_event (2)

please test deadlock in input_event

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

---
 drivers/input/evdev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 51e0c4954600..181c798b232b 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -258,7 +258,7 @@ static void evdev_pass_values(struct evdev_client *client,
 	event.input_event_usec = ts.tv_nsec / NSEC_PER_USEC;
 
 	/* Interrupts are disabled, just acquire the lock. */
-	spin_lock(&client->buffer_lock);
+	spin_lock_irq(&client->buffer_lock);
 
 	for (v = vals; v != vals + count; v++) {
 		if (__evdev_is_filtered(client, v->type, v->code))
@@ -278,7 +278,7 @@ static void evdev_pass_values(struct evdev_client *client,
 		__pass_event(client, &event);
 	}
 
-	spin_unlock(&client->buffer_lock);
+	spin_unlock_irq(&client->buffer_lock);
 
 	if (wakeup)
 		wake_up_interruptible_poll(&client->wait,
-- 
2.34.1