linux-kernel - Re: [syzbot] [bluetooth?] KASAN: null-ptr-deref Read in ida

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Date:   Sun, 26 Nov 2023 03:15:05 -0800
From:   syzbot <syzbot+51baee846ddab52d5230@...kaller.appspotmail.com>
To:     davem@...emloft.net, edumazet@...gle.com, johan.hedberg@...il.com,
        kuba@...nel.org, linux-bluetooth@...r.kernel.org,
        linux-kernel@...r.kernel.org, luiz.dentz@...il.com,
        luiz.von.dentz@...el.com, marcel@...tmann.org,
        netdev@...r.kernel.org, pabeni@...hat.com,
        syzkaller-bugs@...glegroups.com, william.xuanziyang@...wei.com
Subject: Re: [syzbot] [bluetooth?] KASAN: null-ptr-deref Read in ida_free (4)

syzbot has bisected this issue to:

commit 181a42edddf51d5d9697ecdf365d72ebeab5afb0
Author: Ziyang Xuan <william.xuanziyang@...wei.com>
Date:   Wed Oct 11 09:57:31 2023 +0000

    Bluetooth: Make handle of hci_conn be unique

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1345177ce80000
start commit:   8c9660f65153 Add linux-next specific files for 20231124
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=10c5177ce80000
console output: https://syzkaller.appspot.com/x/log.txt?x=1745177ce80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ca1e8655505e280
dashboard link: https://syzkaller.appspot.com/bug?extid=51baee846ddab52d5230
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10d54c08e80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=160ef1a4e80000

Reported-by: syzbot+51baee846ddab52d5230@...kaller.appspotmail.com
Fixes: 181a42edddf5 ("Bluetooth: Make handle of hci_conn be unique")

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