OK. The patch was sent to linux.git as commit 1e047eaab3bb5564.
#syz fix: block/loop: fix deadlock after loop_set_status
Dmitry Vyukov <dvyu...@google.com>" wrote:
> On Tue, Apr 10, 2018 at 3:04 PM, Tetsuo Handa
> <penguin-ker...@i-love.sakura.ne.jp> wrote:
> > Dmitry Vyukov wrote:
> >> On Tue, Apr 10, 2018 at 12:55 PM, Tetsuo Handa
> >> <penguin-ker...@i-love.sakura.ne.jp> wrote:
> >> > Hello.
> >> >
> >> > Since syzbot is reporting so many hung up bug which involves /dev/loopX ,
> >> > is it possible to "temporarily" apply below patch for testing under
> >> > syzbot
> >> Unfortunately it's not possible, for full explanation please see:
> >> https://github.com/google/syzkaller/blob/master/docs/syzbot.md#no-custom-patches
> > I mean, sending custom patch to linux.git for -rc and revert the custom
> > patch
> > before -final is released. It won't take so much period until we get the
> > result.
> Ah, I see, then I guess it wasn't a question to me.
I noticed that there already is the lockdep report at
possible deadlock in blkdev_reread_part
entry, and no patch is proposed yet: