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| author | Phillip Lougher <phillip@squashfs.org.uk> | 2013-09-03 04:02:53 +0100 |
|---|---|---|
| committer | Phillip Lougher <phillip@squashfs.org.uk> | 2013-09-06 04:57:52 +0100 |
| commit | 9dbc41d5d371cb10099c8182552f3915920e69b6 (patch) | |
| tree | fa549b1308a13d40f8de494889dc9d315eea894b /fs/squashfs | |
| parent | e0125262a2f5cefbfb3804117f8ab16e9ba13e29 (diff) | |
| download | lwn-9dbc41d5d371cb10099c8182552f3915920e69b6.tar.gz lwn-9dbc41d5d371cb10099c8182552f3915920e69b6.zip | |
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>
Diffstat (limited to 'fs/squashfs')
| -rw-r--r-- | fs/squashfs/namei.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/squashfs/namei.c b/fs/squashfs/namei.c index f866d42a8b6f..342a5aa5a0e4 100644 --- a/fs/squashfs/namei.c +++ b/fs/squashfs/namei.c @@ -104,10 +104,8 @@ static int get_dir_index_using_name(struct super_block *sb, 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); |