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| author | Josef Bacik <josef@toxicpanda.com> | 2020-01-24 09:32:29 -0500 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-02-10 14:40:29 +0100 |
| commit | bf34b1a99de01cf4580e4dd7aeec58d1c1e58da0 (patch) | |
| tree | 96a80d0221598f933c3a8e8bcd0c555a8a4b1f5a | |
| parent | 4bee9e5465b60ab49a0407c05c4348c3149fe495 (diff) | |
| download | btrfs-next-bf34b1a99de01cf4580e4dd7aeec58d1c1e58da0.tar.gz | |
btrfs: hold a root ref in btrfs_get_dentry
Looking up the inode we need to search the root, make sure we hold a
reference on that root while we're doing the lookup.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/export.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c index 08cd8c4a02a5d2..eba6c6d27bade1 100644 --- a/fs/btrfs/export.c +++ b/fs/btrfs/export.c @@ -82,12 +82,17 @@ static struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid, err = PTR_ERR(root); goto fail; } + if (!btrfs_grab_fs_root(root)) { + err = -ENOENT; + goto fail; + } key.objectid = objectid; key.type = BTRFS_INODE_ITEM_KEY; key.offset = 0; inode = btrfs_iget(sb, &key, root); + btrfs_put_fs_root(root); if (IS_ERR(inode)) { err = PTR_ERR(inode); goto fail; |