linux-kernel - Re: possible deadlock in acct_pin

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Message-ID: <0000000000008738e9058514f19c@google.com>
Date:   Wed, 27 Mar 2019 08:18:01 -0700
From:   syzbot <syzbot+2a73a6ea9507b7112141@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, amir73il@...il.com,
        gregkh@...uxfoundation.org, kstewart@...uxfoundation.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        mark.rutland@....com, mszeredi@...hat.com, oleg@...hat.com,
        paulmck@...ux.vnet.ibm.com, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, viro@...iv.linux.org.uk
Subject: Re: possible deadlock in acct_pin_kill

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger  
crash:

Reported-and-tested-by:  
syzbot+2a73a6ea9507b7112141@...kaller.appspotmail.com

Tested on:

commit:         6c66f635 kernel/acct.c: fix locking order when switching a..
git tree:       https://github.com/amir73il/linux.git acct_pin_kill_deadlock
kernel config:  https://syzkaller.appspot.com/x/.config?x=bd771c0a1616f2b7
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)

Note: testing is done by a robot and is best-effort only.