korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-28 06:34:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

btrfs: hold a ref on the root in resolve_indirect_ref

Browse Source 
We're looking up a random root, we need to hold a ref on it while we're
using it.

Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2020-01-24 09:32:28 -05:00 committed by David Sterba
parent af01d2e53f
commit 9326f76f4b
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
fs/btrfs/backref.c
View File

@ -524,7 +524,13 @@ static int resolve_indirect_ref(struct btrfs_fs_info *fs_info,
if (IS_ERR(root)) {
srcu_read_unlock(&fs_info->subvol_srcu, index);
ret = PTR_ERR(root);
goto out;
goto out_free;
}
if (!btrfs_grab_fs_root(root)) {
srcu_read_unlock(&fs_info->subvol_srcu, index);
ret = -ENOENT;
goto out_free;
}
if (btrfs_is_testing(fs_info)) {
@ -577,6 +583,8 @@ static int resolve_indirect_ref(struct btrfs_fs_info *fs_info,
ret = add_all_parents(root, path, parents, ref, level, time_seq,
extent_item_pos, total_refs, ignore_offset);
out:
btrfs_put_fs_root(root);
out_free:
path->lowest_level = 0;
btrfs_release_path(path);
return ret;