diff options
| author | Ye Bin <yebin10@huawei.com> | 2020-09-01 09:25:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-09 20:04:31 +0300 |
| commit | 67f03c3d6829cf9c4b4015b24326a2cb7b8d6664 (patch) | |
| tree | 638e00d0fa3f380d30b4a6350e3f62f7d32bf2b7 /drivers | |
| parent | 154096e9966123f198cfc2f959bc559c562fc6b7 (diff) | |
| download | linux-67f03c3d6829cf9c4b4015b24326a2cb7b8d6664.tar.xz | |
dm cache metadata: Avoid returning cmd->bm wild pointer on error
commit d16ff19e69ab57e08bf908faaacbceaf660249de upstream.
Maybe __create_persistent_data_objects() caller will use PTR_ERR as a
pointer, it will lead to some strange things.
Signed-off-by: Ye Bin <yebin10@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-cache-metadata.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c index 151aa95775be..af6d4f898e4c 100644 --- a/drivers/md/dm-cache-metadata.c +++ b/drivers/md/dm-cache-metadata.c @@ -537,12 +537,16 @@ static int __create_persistent_data_objects(struct dm_cache_metadata *cmd, CACHE_MAX_CONCURRENT_LOCKS); if (IS_ERR(cmd->bm)) { DMERR("could not create block manager"); - return PTR_ERR(cmd->bm); + r = PTR_ERR(cmd->bm); + cmd->bm = NULL; + return r; } r = __open_or_format_metadata(cmd, may_format_device); - if (r) + if (r) { dm_block_manager_destroy(cmd->bm); + cmd->bm = NULL; + } return r; } |