linux-kernel - Re: KASAN: use-after-free Read in vhci_hub

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Message-ID: <000000000000c460630596c1d40d@google.com>
Date:   Thu, 07 Nov 2019 05:42:06 -0800
From:   syzbot <syzbot+600b03e0cf1b73bb23c4@...kaller.appspotmail.com>
To:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, shuah@...nel.org,
        stable@...r.kernel.org, sudipm.mukherjee@...il.com,
        syzkaller-bugs@...glegroups.com, valentina.manea.m@...il.com
Subject: Re: KASAN: use-after-free Read in vhci_hub_control

syzbot suspects this bug was fixed by commit:

commit 81f7567c51ad97668d1c3a48e8ecc482e64d4161
Author: Shuah Khan (Samsung OSG) <shuah@...nel.org>
Date:   Fri Oct 5 22:17:44 2018 +0000

     usb: usbip: Fix BUG: KASAN: slab-out-of-bounds in vhci_hub_control()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14046c2c600000
start commit:   420f51f4 Merge tag 'arm64-fixes' of git://git.kernel.org/p..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=531a917630d2a492
dashboard link: https://syzkaller.appspot.com/bug?extid=600b03e0cf1b73bb23c4
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1116710a400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=119be4ea400000

If the result looks correct, please mark the bug fixed by replying with:

#syz fix: usb: usbip: Fix BUG: KASAN: slab-out-of-bounds in  
vhci_hub_control()

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