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| author | Chao Yu <yuchao0@huawei.com> | 2016-08-31 11:44:36 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-08-31 11:44:36 -0400 |
| commit | 8913f343cdb568222c95afe3cad78aee1a4df56b (patch) | |
| tree | 8a66c63713f0a8c284e1029fd2504164c0050d59 /fs/mbcache.c | |
| parent | 14fbd4aa613bd5110556c281799ce36dc6f3ba97 (diff) | |
| download | linux-8913f343cdb568222c95afe3cad78aee1a4df56b.tar.bz2 | |
mbcache: fix to detect failure of register_shrinker
register_shrinker in mb_cache_create may fail due to no memory. This
patch fixes to do the check of return value of register_shrinker and
handle the error case, otherwise mb_cache_create may return with no
error, but losing the inner shrinker.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/mbcache.c')
| -rw-r--r-- | fs/mbcache.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/mbcache.c b/fs/mbcache.c index eccda3a02de6..c5bd19ffa326 100644 --- a/fs/mbcache.c +++ b/fs/mbcache.c @@ -366,7 +366,11 @@ struct mb_cache *mb_cache_create(int bucket_bits) cache->c_shrink.count_objects = mb_cache_count; cache->c_shrink.scan_objects = mb_cache_scan; cache->c_shrink.seeks = DEFAULT_SEEKS; - register_shrinker(&cache->c_shrink); + if (register_shrinker(&cache->c_shrink)) { + kfree(cache->c_hash); + kfree(cache); + goto err_out; + } INIT_WORK(&cache->c_shrink_work, mb_cache_shrink_worker); |