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btrfs: zoned: fix wrong mutex unlock on failure to allocate log root tree

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When syncing the log, if we fail to allocate the root node for the log
root tree:

1) We are unlocking fs_info->tree_log_mutex, but at this point we have
   not yet locked this mutex;

2) We have locked fs_info->tree_root->log_mutex, but we end up not
   unlocking it;

So fix this by unlocking fs_info->tree_root->log_mutex instead of
fs_info->tree_log_mutex.

Fixes: e75f9fd194 ("btrfs: zoned: move log tree node allocation out of log_root_tree->log_mutex")
CC: stable@vger.kernel.org # 5.13+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2021-07-07 12:23:45 +01:00 • committed by David Sterba
parent 9cc0b837e1
commit ea32af47f0
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/tree-log.c
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@ -3173,7 +3173,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
if (!log_root_tree->node) {
ret = btrfs_alloc_log_tree_node(trans, log_root_tree);
if (ret) {
mutex_unlock(&fs_info->tree_log_mutex);
mutex_unlock(&fs_info->tree_root->log_mutex);
goto out;
}
}