linux-kernel - Re: [syzbot] [usb?] WARNING in usbnet_start_xmit/usb_submit

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Message-ID: <000000000000e298cd05fecc07d4@google.com>
Date:   Fri, 23 Jun 2023 06:32:22 -0700
From:   syzbot <syzbot+63ee658b9a100ffadbe2@...kaller.appspotmail.com>
To:     andreyknvl@...gle.com, davem@...emloft.net, dvyukov@...gle.com,
        edumazet@...gle.com, gregkh@...uxfoundation.org,
        kbuild-all@...ts.01.org, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        lkp@...el.com, netdev@...r.kernel.org, nogikh@...gle.com,
        oneukum@...e.com, pabeni@...hat.com, stern@...land.harvard.edu,
        syzkaller-bugs@...glegroups.com, troels@...nectedcars.dk
Subject: Re: [syzbot] [usb?] WARNING in usbnet_start_xmit/usb_submit_urb

syzbot has bisected this issue to:

commit 45bf39f8df7f05efb83b302c65ae3b9bc92b7065
Author: Alan Stern <stern@...land.harvard.edu>
Date:   Tue Jan 31 20:49:04 2023 +0000

    USB: core: Don't hold device lock while reading the "descriptors" sysfs file

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=124b5877280000
start commit:   692b7dc87ca6 Merge tag 'hyperv-fixes-signed-20230619' of g..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=114b5877280000
console output: https://syzkaller.appspot.com/x/log.txt?x=164b5877280000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2cbd298d0aff1140
dashboard link: https://syzkaller.appspot.com/bug?extid=63ee658b9a100ffadbe2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1760094b280000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1359cdf3280000

Reported-by: syzbot+63ee658b9a100ffadbe2@...kaller.appspotmail.com
Fixes: 45bf39f8df7f ("USB: core: Don't hold device lock while reading the "descriptors" sysfs file")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection