When encountering a corrupted fs root node, fsck hit following message:
Check tree block failed, want=
29360128, have=0
Check tree block failed, want=
29360128, have=0
Check tree block failed, want=
29360128, have=0
Check tree block failed, want=
29360128, have=0
Check tree block failed, want=
29360128, have=0
read block failed check_tree_block
Checking filesystem on /dev/sda9
UUID:
0d295d80-bae2-45f2-a106-
120dbfd0e173
checking extents
Segmentation fault (core dumped)
This is because in btrfs_setup_all_roots(), we check
btrfs_read_fs_root() return value by verifing whether it is
NULL pointer, this is wrong since btrfs_read_fs_root() return
PTR_ERR(ret), fix it.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
int size_fail = 0;
root = btrfs_read_fs_root(tree_root->fs_info, key);
- if (!root) {
+ if (IS_ERR(root)) {
fprintf(stderr, "Failed to read root %Lu\n", key->objectid);
return 1;
}
key.offset = (u64)-1;
fs_info->fs_root = btrfs_read_fs_root(fs_info, &key);
- if (!fs_info->fs_root)
+ if (IS_ERR(fs_info->fs_root))
return -EIO;
return 0;
}