linux-kernel - Forwarded: Re: [syzbot] [input?] [usb?] WARNING in cm109_urb_irq

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-prev] [day] [month] [year] [list]

Message-ID: <69586876.050a0220.1c9965.0006.GAE@google.com>
Date: Fri, 02 Jan 2026 16:53:10 -0800
From: syzbot <syzbot+c708736c2ec142a386fd@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Forwarded: Re: [syzbot] [input?] [usb?] WARNING in cm109_urb_irq_callback

For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com.

***

Subject: Re: [syzbot] [input?] [usb?] WARNING in cm109_urb_irq_callback
Author: yiconghui@...il.com

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

--- a/drivers/input/misc/cm109.c
+++ b/drivers/input/misc/cm109.c
@@ -375,13 +375,17 @@ static void cm109_submit_ctl(struct cm109_dev *dev)
      dev->ctl_data->byte[HID_OR2] = dev->keybit;

      dev->buzzer_pending = 0;
-    dev->ctl_urb_pending = 1;

-    error = usb_submit_urb(dev->urb_ctl, GFP_ATOMIC);
-    if (error)
-        dev_err(&dev->intf->dev,
-            "%s: usb_submit_urb (urb_ctl) failed %d\n",
-            __func__, error);
+    if (!dev->ctl_urb_pending) {
+        dev->ctl_urb_pending = 1;
+
+
+        error = usb_submit_urb(dev->urb_ctl, GFP_ATOMIC);
+        if (error)
+            dev_err(&dev->intf->dev,
+                "%s: usb_submit_urb (urb_ctl) failed %d\n",
+                __func__, error);
+    }
  }

  /*
--