[PATCH v2 0/2] fcntl: fix potential deadlocks
From: Desmond Cheong Zhi Xi <hidden>
Date: 2021-07-07 02:36:29
Also in:
linux-fsdevel, lkml
Hi, Sorry for the delay between v1 and v2, there was an unrelated issue with Syzbot testing. 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 v1 -> v2: - Added WARN_ON_ONCE(irqs_disabled()) before calls to read_lock_irq, with elaboration in the commit message, as suggested by Jeff Layton. 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 | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) -- 2.25.1 _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees