linux-kernel - Re: WARNING: bad unlock balance in ucma_destroy

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Date:   Wed, 10 Apr 2019 23:53:01 -0700
From:   syzbot <syzbot+4b628fcc748474003457@...kaller.appspotmail.com>
To:     dledford@...hat.com, haggaie@...lanox.com,
        hal.rosenstock@...il.com, jgg@...pe.ca, leon@...nel.org,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
        parav@...lanox.com, raindel@...lanox.com, roland@...estorage.com,
        sean.hefty@...el.com, swise@...ngridcomputing.com,
        syzkaller-bugs@...glegroups.com, yishaih@...lanox.com
Subject: Re: WARNING: bad unlock balance in ucma_destroy_id

syzbot has bisected this bug to:

commit e1c30298ccab87151a0c4241fc5985c591598361
Author: Yishai Hadas <yishaih@...lanox.com>
Date:   Thu Aug 13 15:32:07 2015 +0000

     IB/ucma: HW Device hot-removal support

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=157538d3200000
start commit:   5b394b2d Linux 4.19-rc1
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=177538d3200000
console output: https://syzkaller.appspot.com/x/log.txt?x=137538d3200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=49927b422dcf0b29
dashboard link: https://syzkaller.appspot.com/bug?extid=4b628fcc748474003457
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13351e2e400000

Reported-by: syzbot+4b628fcc748474003457@...kaller.appspotmail.com
Fixes: e1c30298ccab ("IB/ucma: HW Device hot-removal support")

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