linux-kernel - Re: [syzbot] WARNING: kmalloc bug in nf_tables

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Date:   Sun, 05 Sep 2021 22:25:07 -0700
From:   syzbot <syzbot+cd43695a64bcd21b8596@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, coreteam@...filter.org,
        davem@...emloft.net, eric.dumazet@...il.com, fw@...len.de,
        kadlec@...filter.org, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        pablo@...filter.org, syzkaller-bugs@...glegroups.com,
        torvalds@...ux-foundation.org, w@....eu
Subject: Re: [syzbot] WARNING: kmalloc bug in nf_tables_newset

syzbot has bisected this issue to:

commit 7661809d493b426e979f39ab512e3adf41fbcc69
Author: Linus Torvalds <torvalds@...ux-foundation.org>
Date:   Wed Jul 14 16:45:49 2021 +0000

    mm: don't allow oversized kvmalloc() calls

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15f767b1300000
start commit:   a9c9a6f741cd Merge tag 'scsi-misc' of git://git.kernel.org..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=17f767b1300000
console output: https://syzkaller.appspot.com/x/log.txt?x=13f767b1300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7860a0536ececf0c
dashboard link: https://syzkaller.appspot.com/bug?extid=cd43695a64bcd21b8596
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13281b33300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1077b4b9300000

Reported-by: syzbot+cd43695a64bcd21b8596@...kaller.appspotmail.com
Fixes: 7661809d493b ("mm: don't allow oversized kvmalloc() calls")

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