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Message-Id: <20210702091831.615042-1-desmondcheongzx@gmail.com>
Date:   Fri,  2 Jul 2021 17:18:29 +0800
From:   Desmond Cheong Zhi Xi <desmondcheongzx@...il.com>
To:     jlayton@...nel.org, bfields@...ldses.org, viro@...iv.linux.org.uk
Cc:     Desmond Cheong Zhi Xi <desmondcheongzx@...il.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        skhan@...uxfoundation.org, gregkh@...uxfoundation.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: [PATCH 0/2] fcntl: fix potential deadlocks

Hi,

Syzbot reports a possible irq lock inversion dependency:
https://syzkaller.appspot.com/bug?id=923cfc6c6348963f99886a0176ef11dcc429547b

While investigating this error, I discovered that multiple similar lock inversion scenarios can occur. Hence, this series addresses potential deadlocks for two classes of locks, one in each patch:

1. Fix potential deadlocks for &fown_struct.lock

2. Fix potential deadlock for &fasync_struct.fa_lock

Best wishes,
Desmond

Desmond Cheong Zhi Xi (2):
  fcntl: fix potential deadlocks for &fown_struct.lock
  fcntl: fix potential deadlock for &fasync_struct.fa_lock

 fs/fcntl.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

-- 
2.25.1

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