linux-kernel - Re: KASAN: slab-out-of-bounds Read in fl6_update

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Date:   Mon, 11 May 2020 13:01:04 -0700
From:   syzbot <syzbot+e8c028b62439eac42073@...kaller.appspotmail.com>
To:     ahabdels@...il.com, davem@...emloft.net, kuba@...nel.org,
        kuznet@....inr.ac.ru, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        yoshfuji@...ux-ipv6.org
Subject: Re: KASAN: slab-out-of-bounds Read in fl6_update_dst

syzbot has bisected this bug to:

commit 0cb7498f234e4e7d75187a8cae6c7c2053f2488a
Author: Ahmed Abdelsalam <ahabdels@...il.com>
Date:   Mon May 4 14:42:11 2020 +0000

    seg6: fix SRH processing to comply with RFC8754

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1154da84100000
start commit:   2ef96a5b Linux 5.7-rc5
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=1354da84100000
console output: https://syzkaller.appspot.com/x/log.txt?x=1554da84100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=efdde85c3af536b5
dashboard link: https://syzkaller.appspot.com/bug?extid=e8c028b62439eac42073
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=102bfda2100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13f8510c100000

Reported-by: syzbot+e8c028b62439eac42073@...kaller.appspotmail.com
Fixes: 0cb7498f234e ("seg6: fix SRH processing to comply with RFC8754")

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