linux-kernel - possible deadlock in shmem_file

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Message-ID: <001a113f932c939af705638a07fd@google.com>
Date:   Wed, 24 Jan 2018 10:42:47 -0800
From:   syzbot <syzbot+8ec30bb7bf1a981a2012@...kaller.appspotmail.com>
To:     arve@...roid.com, devel@...verdev.osuosl.org, dvyukov@...gle.com,
        gregkh@...uxfoundation.org, hughd@...gle.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org, maco@...roid.com,
        syzkaller-bugs@...glegroups.com, tkjos@...roid.com
Subject: possible deadlock in shmem_file_llseek

Hello,

syzbot tried to test the proposed patch but build/boot failed:

patch is already applied


Tested on https://github.com/joelagnel/linux.git/test-ashmem commit
32f813bb0d06c1e189ac336f8c3c7377f85c71f0 (Wed Jan 24 01:45:04 2018 +0000)
ashmem: Fix lockdep issue during llseek

compiler: gcc (GCC) 7.1.1 20170620
Patch is attached.




View attachment "patch.diff" of type "text/plain" (329 bytes)