linux-kernel - [GIT PULL] fasync fix for v4.18

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Date:   Mon, 04 Jun 2018 09:28:18 -0400
From:   Jeff Layton <jlayton@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Bruce Fields <bfields@...ldses.org>
Subject: [GIT PULL] fasync fix for v4.18

The following changes since commit fff75eb2a08c2ac96404a2d79685668f3cf5a7a3:

  Merge tag 'errseq-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux (2018-04-30 16:53:40 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git tags/locks-v4.18-1

for you to fetch changes up to 7a107c0f55a3b4c6f84a4323df5610360bde1684:

  fasync: Fix deadlock between task-context and interrupt-context kill_fasync() (2018-05-01 07:39:50 -0400)

----------------------------------------------------------------

Just a single fix for a deadlock in the fasync handling code that Kirill
observed while testing. The fix is to change the fa_lock to be rwlock_t,
and use a read lock in kill_fasync_rcu.

----------------------------------------------------------------
Kirill Tkhai (1):
      fasync: Fix deadlock between task-context and interrupt-context kill_fasync()

 fs/fcntl.c         | 15 +++++++--------
 include/linux/fs.h |  2 +-
 2 files changed, 8 insertions(+), 9 deletions(-)

-- 
Jeff Layton <jlayton@...nel.org>