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

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Date:   Fri, 03 Sep 2021 19:06:11 -0700
From:   syzbot <syzbot+2b8443c35458a617c904@...kaller.appspotmail.com>
To:     axboe@...nel.dk, chaitanya.kulkarni@....com,
        coreteam@...filter.org, davem@...emloft.net,
        eric.dumazet@...il.com, fw@...len.de, hch@....de,
        ira.weiny@...el.com, johan.hedberg@...il.com, kadlec@...filter.org,
        kuba@...nel.org, linux-bluetooth@...r.kernel.org,
        linux-kernel@...r.kernel.org, luiz.dentz@...il.com,
        marcel@...tmann.org, martin.petersen@...cle.com,
        netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        pablo@...filter.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] WARNING: kmalloc bug in hash_net_create

syzbot has bisected this issue to:

commit e6e7471706dc42cbe0e01278540c0730138d43e5
Author: Christoph Hellwig <hch@....de>
Date:   Tue Jul 27 05:56:34 2021 +0000

    bvec: add a bvec_kmap_local helper

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12d7ad33300000
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=11d7ad33300000
console output: https://syzkaller.appspot.com/x/log.txt?x=16d7ad33300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1ac29107aeb2a552
dashboard link: https://syzkaller.appspot.com/bug?extid=2b8443c35458a617c904
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12fba55d300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15bd2f49300000

Reported-by: syzbot+2b8443c35458a617c904@...kaller.appspotmail.com
Fixes: e6e7471706dc ("bvec: add a bvec_kmap_local helper")

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