From ca2037fba6af039c18ae3219ff2fbacf2ca7c133 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Fri, 24 Jan 2020 09:32:51 -0500 Subject: btrfs: hold a ref on the root in btrfs_recover_log_trees We replay the log into arbitrary fs roots, hold a ref on the root while we're doing this. Signed-off-by: Josef Bacik Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/tree-log.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/btrfs/tree-log.c') diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 556aa4a614f5..169270c931a9 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -6163,6 +6163,10 @@ again: tmp_key.offset = (u64)-1; wc.replay_dest = btrfs_get_fs_root(fs_info, &tmp_key, true); + if (!IS_ERR(wc.replay_dest)) { + if (!btrfs_grab_fs_root(wc.replay_dest)) + wc.replay_dest = ERR_PTR(-ENOENT); + } if (IS_ERR(wc.replay_dest)) { ret = PTR_ERR(wc.replay_dest); @@ -6219,6 +6223,7 @@ again: } wc.replay_dest->log_root = NULL; + btrfs_put_fs_root(wc.replay_dest); free_extent_buffer(log->node); free_extent_buffer(log->commit_root); kfree(log); -- cgit v1.2.3