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

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Date:   Mon, 03 Aug 2020 22:53:05 -0700
From:   syzbot <syzbot+98228e7407314d2d4ba2@...kaller.appspotmail.com>
To:     a@...table.cc, b.a.t.m.a.n@...ts.open-mesh.org,
        davem@...emloft.net, johan.hedberg@...il.com, kuba@...nel.org,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        marcel@...tmann.org, mareklindner@...mailbox.ch,
        michael.chan@...adcom.com, netdev@...r.kernel.org,
        sw@...onwunderlich.de, syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in hci_send_acl

syzbot has bisected this issue to:

commit 4ffcd582301bd020b1f9d00c55473af305ec19b5
Author: Michael Chan <michael.chan@...adcom.com>
Date:   Mon Sep 19 07:58:07 2016 +0000

    bnxt_en: Pad TX packets below 52 bytes.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=167b0f04900000
start commit:   ac3a0c84 Merge git://git.kernel.org/pub/scm/linux/kernel/g..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=157b0f04900000
console output: https://syzkaller.appspot.com/x/log.txt?x=117b0f04900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c0cfcf935bcc94d2
dashboard link: https://syzkaller.appspot.com/bug?extid=98228e7407314d2d4ba2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=152f1904900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1482dfca900000

Reported-by: syzbot+98228e7407314d2d4ba2@...kaller.appspotmail.com
Fixes: 4ffcd582301b ("bnxt_en: Pad TX packets below 52 bytes.")

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