linux-kernel - [PATCH] media: imon: ratelimit usb_rx_callback

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <56c16d80-57d0-4873-98c8-03e37edbbbdf@I-love.SAKURA.ne.jp>
Date: Thu, 10 Jul 2025 10:43:56 +0900
From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To: Sean Young <sean@...s.org>, Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] media: imon: ratelimit usb_rx_callback_intf{0,1} error
 messages

Ratelimiting flood of

  imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored

message helps reducing possibility of hitting

  rcu: INFO: rcu_preempt self-detected stall on CPU
  rcu: 	0-....: (10485 ticks this GP) idle=ff54/1/0x4000000000000000 softirq=53201/53201 fqs=5246
  rcu: 	         hardirqs   softirqs   csw/system
  rcu: 	 number:     6548       7856            0
  rcu: 	cputime:        0        739        51598   ==> 52490(ms)
  rcu: 	(t=10500 jiffies g=34137 q=35661 ncpus=2)
  CPU: 0 UID: 0 PID: 6858 Comm: kworker/0:4 Not tainted 6.16.0-rc4-syzkaller-00300-g81c3b7256f9e #0 PREEMPT(voluntary)
  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
  Workqueue: usb_hub_wq hub_event
  RIP: 0010:console_flush_all+0x9a2/0xc60 kernel/printk/printk.c:3227

messages.

Link: https://syzkaller.appspot.com/bug?extid=592e2ab8775dbe0bf09a
Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
---
 drivers/media/rc/imon.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/rc/imon.c b/drivers/media/rc/imon.c
index f5221b018808..10124a26ffde 100644
--- a/drivers/media/rc/imon.c
+++ b/drivers/media/rc/imon.c
@@ -1765,7 +1765,7 @@ static void usb_rx_callback_intf0(struct urb *urb)
 		break;
 
 	default:
-		dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
+		dev_warn_ratelimited(ictx->dev, "imon %s: status(%d): ignored\n",
 			 __func__, urb->status);
 		break;
 	}
@@ -1806,7 +1806,7 @@ static void usb_rx_callback_intf1(struct urb *urb)
 		break;
 
 	default:
-		dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
+		dev_warn_ratelimited(ictx->dev, "imon %s: status(%d): ignored\n",
 			 __func__, urb->status);
 		break;
 	}
-- 
2.47.1