Re: [syzbot] WARNING: zero-size vmalloc in corrupted

On Wed, 23 Jun 2021 02:15:23 -0700
syzbot [off-list ref] wrote:

Hello,

syzbot found the following issue on:

HEAD commit:    13311e74 Linux 5.13-rc7
git tree:       upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=15d01e58300000 kernel
config:  https://syzkaller.appspot.com/x/.config?x=42ecca11b759d96c
dashboard link:
https://syzkaller.appspot.com/bug?extid=c2f6f09fe907a838effb syz
repro:
https://syzkaller.appspot.com/x/repro.syz?x=14bb89e8300000 C
reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17cc51b8300000

The issue was bisected to:

commit f9006acc8dfe59e25aa75729728ac57a8d84fc32
Author: Florian Westphal [off-list ref]
Date:   Wed Apr 21 07:51:08 2021 +0000

    netfilter: arp_tables: pass table pointer via nf_hook_ops

bisection log:
https://syzkaller.appspot.com/x/bisect.txt?x=13b88400300000 final
oops:     https://syzkaller.appspot.com/x/report.txt?x=10788400300000
console output:
https://syzkaller.appspot.com/x/log.txt?x=17b88400300000

This one is similar to previous zero-size vmalloc, I guess :)

#syz test
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master


With regards,
Pavel Skripkin