Re: WARNING: refcount bug in should_fail

Eric W. Biederman wrote:

Al Viro [off-list ref] writes:

quoted

On Mon, Apr 02, 2018 at 10:59:34PM +0100, Al Viro wrote:

quoted

FWIW, I'm going through the ->kill_sb() instances, fixing that sort
of bugs (most of them preexisting, but I should've checked instead
of assuming that everything's fine).  Will push out later tonight.

OK, see vfs.git#for-linus.  Caught: 4 old bugs (allocation failure
in fill_super oopses ->kill_sb() in hypfs, jffs2 and orangefs resp.
and double-dput in late failure exit in rpc_fill_super())
and 5 regressions from register_shrinker() failure recovery.

One issue with your vfs.git#for-linus branch.

It is missing Fixes tags and  Cc: stable on those patches.
As the bug came in v4.15 those tags would really help the stable
maintainers get the recent regression fixes applied.

OK. The patch was sent to linux.git as commit 8e04944f0ea8b838.

#syz fix: mm,vmscan: Allow preallocating memory for register_shrinker().