From: Josef Bacik <josef@toxicpanda.com>
Date: Fri, 24 Jan 2020 09:32:42 -0500
Git-commit: 3d7babdcf2cc87367e694f9b67460dde22c48319
Patch-mainline: 5.7-rc1
References: bsc#1176019
Subject: [PATCH] btrfs: hold a ref on the root in find_data_references
We're looking up the data references for the bytenr in a root, we need
to hold a ref on that root while we're doing that.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
---
fs/btrfs/relocation.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 0336a48d7d96..976917ca412a 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3751,7 +3751,11 @@ static int find_data_references(struct reloc_control *rc,
root = read_fs_root(fs_info, ref_root);
if (IS_ERR(root)) {
err = PTR_ERR(root);
- goto out;
+ goto out_free;
+ }
+ if (!btrfs_grab_fs_root(root)) {
+ err = -ENOENT;
+ goto out_free;
}
key.objectid = ref_objectid;
@@ -3864,6 +3868,8 @@ static int find_data_references(struct reloc_control *rc,
}
out:
+ btrfs_put_fs_root(root);
+out_free:
btrfs_free_path(path);
return err;
}
--
2.26.2