linux-kernel - Re: [syzbot] WARNING in p9_client

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Date:   Sun, 24 Jul 2022 06:17:16 -0700
From:   syzbot <syzbot+5e28cdb7ebd0f2389ca4@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, asmadeus@...ewreck.org,
        davem@...emloft.net, edumazet@...gle.com, elver@...gle.com,
        ericvh@...il.com, hdanton@...a.com, k.kahurani@...il.com,
        kuba@...nel.org, linux-kernel@...r.kernel.org,
        linux_oss@...debyte.com, lucho@...kov.net, netdev@...r.kernel.org,
        pabeni@...hat.com, rientjes@...gle.com,
        syzkaller-bugs@...glegroups.com, torvalds@...ux-foundation.org,
        v9fs-developer@...ts.sourceforge.net, vbabka@...e.cz
Subject: Re: [syzbot] WARNING in p9_client_destroy

syzbot has bisected this issue to:

commit 7302e91f39a81a9c2efcf4bc5749d18128366945
Author: Marco Elver <elver@...gle.com>
Date:   Fri Jan 14 22:03:58 2022 +0000

    mm/slab_common: use WARN() if cache still has objects on destroy

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=142882ce080000
start commit:   cb71b93c2dc3 Add linux-next specific files for 20220628
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=162882ce080000
console output: https://syzkaller.appspot.com/x/log.txt?x=122882ce080000
kernel config:  https://syzkaller.appspot.com/x/.config?x=badbc1adb2d582eb
dashboard link: https://syzkaller.appspot.com/bug?extid=5e28cdb7ebd0f2389ca4
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=156f74ee080000

Reported-by: syzbot+5e28cdb7ebd0f2389ca4@...kaller.appspotmail.com
Fixes: 7302e91f39a8 ("mm/slab_common: use WARN() if cache still has objects on destroy")

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