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sget(): handle failures of register_shrinker() 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-12-18 15:05:07 -05:00
parent bb422a738f
commit 9ee332d99e
1 changed files with 5 additions and 1 deletions
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6
fs/super.c
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@ -517,7 +517,11 @@ struct super_block *sget_userns(struct file_system_type *type,
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;
}