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From: Alan Stern <stern@rowland.harvard.edu>
To: syzbot <syzbot+9b57a46bf1801ce2a2ca@syzkaller.appspotmail.com>
Cc: benjamin.tissoires@redhat.com, jikos@kernel.org,
	linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-usb@vger.kernel.org, mkubecek@suse.cz,
	syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] WARNING in hid_submit_ctrl/usb_submit_urb
Date: Thu, 19 Aug 2021 11:26:26 -0400	[thread overview]
Message-ID: <20210819152626.GD228422@rowland.harvard.edu> (raw)
In-Reply-To: <000000000000f7ab1005c9db0f8e@google.com>

On Wed, Aug 18, 2021 at 01:13:06PM -0700, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch but the reproducer is still triggering an issue:
> WARNING in hid_submit_ctrl/usb_submit_urb
> 
> ------------[ cut here ]------------
> usb 1-1: BOGUS control dir, pipe 80000280 doesn't match bRequestType a1
> WARNING: CPU: 1 PID: 10180 at drivers/usb/core/urb.c:410 usb_submit_urb+0x149d/0x18a0 drivers/usb/core/urb.c:410

Looks like I was wrong.  Let's see what's really happening.

Alan Stern

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 794c7931a242

--- usb-devel.orig/drivers/hid/usbhid/hid-core.c
+++ usb-devel/drivers/hid/usbhid/hid-core.c
@@ -397,6 +397,8 @@ static int hid_submit_ctrl(struct hid_de
 		} else
 			padlen = 0;
 		usbhid->urbctrl->transfer_buffer_length = padlen;
+		hid_err(hid, "submit_ctrl: maxpacket %d len %d padlen %d\n",
+				maxpacket, len, padlen);
 	}
 	usbhid->urbctrl->dev = hid_to_usb_dev(hid);
 

  reply	other threads:[~2021-08-19 15:26 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-18 15:46 syzbot
2021-08-18  9:14 ` syzbot
2021-08-18 18:49   ` Alan Stern
2021-08-18 20:13     ` syzbot
2021-08-19 15:26       ` Alan Stern [this message]
2021-08-19 17:35         ` syzbot
2021-08-19 19:53           ` Alan Stern
2021-08-20  0:40             ` syzbot
2021-08-20 14:06               ` Alan Stern
2021-08-24 11:53                 ` Jiri Kosina
2021-08-24 12:34                   ` Benjamin Tissoires
2021-08-31  9:51                   ` Benjamin Tissoires
2021-08-31 13:34                     ` Alan Stern
2021-08-31 19:53                       ` Jiri Kosina
2021-09-01 15:38                     ` Alan Stern
2021-09-01 15:51                       ` Michal Kubecek
2021-08-24 11:50             ` Michal Kubecek
2021-08-30 19:22             ` Oleksandr Natalenko
2021-08-18 19:01   ` Alan Stern
2021-08-18 19:39 ` syzbot

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