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Date:   Mon, 24 May 2021 11:21:52 +0200
From:   Johan Hovold <johan@kernel.org>
To:     syzbot <syzbot+5d0b6bcdaaa6d1cb6ef3@syzkaller.appspotmail.com>
Cc:     gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
        linux-usb@vger.kernel.org, mathias.nyman@linux.intel.com,
        syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] WARNING in e2i_init/usb_submit_urb
Message-ID: <YKtwMB0bXhayVwt4@hovoldconsulting.com>
References: <000000000000f61b1905c30fd185@google.com>
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On Mon, May 24, 2021 at 02:13:18AM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    5cc59c41 USB: core: WARN if pipe direction != setup packet..
> git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
> console output: https://syzkaller.appspot.com/x/log.txt?x=17a30553d00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=1206ee92dd3d988d
> dashboard link: https://syzkaller.appspot.com/bug?extid=5d0b6bcdaaa6d1cb6ef3
> 
> Unfortunately, I don't have any reproducer for this issue yet.
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+5d0b6bcdaaa6d1cb6ef3@syzkaller.appspotmail.com
> 
> ------------[ cut here ]------------
> usb 6-1: BOGUS control dir, pipe 80001d80 doesn't match bRequestType 2
> WARNING: CPU: 0 PID: 7 at drivers/usb/core/urb.c:410 usb_submit_urb+0x14aa/0x1830 drivers/usb/core/urb.c:410
> Modules linked in:
> CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.13.0-rc2-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> Workqueue: usb_hub_wq hub_event
> RIP: 0010:usb_submit_urb+0x14aa/0x1830 drivers/usb/core/urb.c:410
> Code: 84 4c 01 00 00 e8 a6 14 b3 fd 4c 89 f7 e8 4e a7 1b ff 45 89 e8 44 89 e1 48 89 ea 48 89 c6 48 c7 c7 c0 09 63 86 e8 18 f1 fb 01 <0f> 0b 49 8d 4f 5c 48 b8 00 00 00 00 00 fc ff df 48 89 ca 48 89 4c
> RSP: 0018:ffffc9000007eee0 EFLAGS: 00010286
> RAX: 0000000000000000 RBX: ffff88811f21b058 RCX: 0000000000000000
> RDX: 0000000000040000 RSI: ffffffff812a6013 RDI: fffff5200000fdce
> RBP: ffff888100bf5e60 R08: 0000000000000001 R09: 0000000000000000
> R10: ffffffff814b996b R11: 0000000000000000 R12: 0000000080001d80
> R13: 0000000000000002 R14: ffff88811f21b0a8 R15: ffff88813b0c7800
> FS:  0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000014a53ad CR3: 0000000007825000 CR4: 00000000001506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>  usb_start_wait_urb+0x101/0x4c0 drivers/usb/core/message.c:58
>  usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
>  usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153
>  e2i_init+0xb3/0x150 drivers/input/touchscreen/usbtouchscreen.c:254
>  usbtouch_probe+0xfc9/0x1c40 drivers/input/touchscreen/usbtouchscreen.c:1771

Had already found but not yet posted the fix for this one too:

	https://lore.kernel.org/r/20210524092048.4443-1-johan@kernel.org

Johan