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d996137a GKH |
1 | From foo@baz Wed Feb 28 16:19:30 CET 2018 |
2 | From: Al Viro <viro@zeniv.linux.org.uk> | |
3 | Date: Mon, 18 Dec 2017 15:05:07 -0500 | |
4 | Subject: sget(): handle failures of register_shrinker() | |
5 | ||
6 | From: Al Viro <viro@zeniv.linux.org.uk> | |
7 | ||
8 | ||
9 | [ Upstream commit 9ee332d99e4d5a97548943b81c54668450ce641b ] | |
10 | ||
11 | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> | |
12 | Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> | |
13 | Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
14 | --- | |
15 | fs/super.c | 6 +++++- | |
16 | 1 file changed, 5 insertions(+), 1 deletion(-) | |
17 | ||
18 | --- a/fs/super.c | |
19 | +++ b/fs/super.c | |
20 | @@ -497,7 +497,11 @@ retry: | |
21 | hlist_add_head(&s->s_instances, &type->fs_supers); | |
22 | spin_unlock(&sb_lock); | |
23 | get_filesystem(type); | |
24 | - register_shrinker(&s->s_shrink); | |
25 | + err = register_shrinker(&s->s_shrink); | |
26 | + if (err) { | |
27 | + deactivate_locked_super(s); | |
28 | + s = ERR_PTR(err); | |
29 | + } | |
30 | return s; | |
31 | } | |
32 |