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sget(): handle failures of register_shrinker()
author
Al Viro
<viro@zeniv.linux.org.uk>
Mon, 18 Dec 2017 20:05:07 +0000
(15:05 -0500)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Sat, 3 Mar 2018 09:19:41 +0000
(10:19 +0100)
[ Upstream commit
9ee332d99e4d5a97548943b81c54668450ce641b
]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/super.c
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diff --git
a/fs/super.c
b/fs/super.c
index
d4d2591
..
09b526a
100644
(file)
--- a/
fs/super.c
+++ b/
fs/super.c
@@
-497,7
+497,11
@@
retry:
hlist_add_head(&s->s_instances, &type->fs_supers);
spin_unlock(&sb_lock);
get_filesystem(type);
- register_shrinker(&s->s_shrink);
+ err = register_shrinker(&s->s_shrink);
+ if (err) {
+ deactivate_locked_super(s);
+ s = ERR_PTR(err);
+ }
return s;
}