Re: [resend PATCH 0/2] fix VFS register_shrinker fixup

From: Al Viro
Date: Tue Dec 19 2017 - 10:34:51 EST

On Tue, Dec 19, 2017 at 04:19:15PM +0100, Michal Hocko wrote:
> Dohh, I have missed resend by Tetsuo
> (thanks for dropping me from the CC). Al seeemed to take the patch. We
> still need patch 2. Al, are you going to take it from this thread or you
> are going to go your way?

Umm... git log for-linus in vfs.git since yesterday:

commit 9ee332d99e4d5a97548943b81c54668450ce641b
Author: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Date: Mon Dec 18 15:05:07 2017 -0500

sget(): handle failures of register_shrinker()

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

commit bb422a738f6566f7439cd347d54e321e4fe92a9f
Author: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Date: Mon Dec 18 20:31:41 2017 +0900

mm,vmscan: Make unregister_shrinker() no-op if register_shrinker() failed.

Syzbot caught an oops at unregister_shrinker() because combination of
commit 1d3d4437eae1bb29 ("vmscan: per-node deferred work") and fault
injection made register_shrinker() fail and the caller of
register_shrinker() did not check for failure.