Squashfs: fix corruption check in get_dir_index_using_name()
Patch "Squashfs: sanity check information from disk" from
Dan Carpenter adds a missing check for corruption in the
"size" field while reading the directory index from disk.
It, however, sets err to -EINVAL, this value is not used later, and
so setting it is completely redundant. So remove it.
Errors in reading the index are deliberately non-fatal. If we
get an error in reading the index we just return the part of the
index we have managed to read - the index isn't essential,
just quicker.
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
diff --git a/fs/squashfs/namei.c b/fs/squashfs/namei.c
index f866d42..342a5aa 100644
--- a/fs/squashfs/namei.c
+++ b/fs/squashfs/namei.c
@@ -104,10 +104,8 @@
size = le32_to_cpu(index->size) + 1;
- if (size > SQUASHFS_NAME_LEN) {
- err = -EINVAL;
+ if (size > SQUASHFS_NAME_LEN)
break;
- }
err = squashfs_read_metadata(sb, index->name, &index_start,
&index_offset, size);
