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2013-09-06Squashfs: fix corruption checks in squashfs_lookup()Phillip Lougher1-1/+2
The dir_count and size fields when read from disk are sanity checked for correctness. However, the sanity checks only check the values are not greater than expected. As dir_count and size were incorrectly defined as signed ints, this can lead to corrupted values appearing as negative which are not trapped. Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
2013-09-06Squashfs: fix corruption check in get_dir_index_using_name()Phillip Lougher1-3/+1
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>
2013-08-29Squashfs: sanity check information from diskDan Carpenter1-1/+6
We read the size of the name from the disk, but a larger name than expected would cause memory corruption. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
2012-07-14stop passing nameidata to ->lookup()Al Viro1-1/+1
Just the flags; only NFS cares even about that, but there are legitimate uses for such argument. And getting rid of that completely would require splitting ->lookup() into a couple of methods (at least), so let's leave that alone for now... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-03-10Squashfs: remove redundant length initialisation in squashfs_lookupPhillip Lougher1-1/+1
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
2012-03-10Squashfs: use define instead of constantAjeet Yadav1-2/+1
Its better to use defined name instead of constant Signed-off-by: Ajeet Yadav <ajeet.yadav.77@gmail.com> Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
2011-07-20make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)Al Viro1-5/+0
... and simplify the living hell out of callers Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20deuglify squashfs_lookup()Al Viro1-4/+1
d_splice_alias(NULL, dentry) is equivalent to d_add(dentry, NULL), NULL so no need for that if (inode) ... in there (or ERR_PTR(0), for that matter) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-05-26Squashfs: update email addressPhillip Lougher1-1/+1
My existing email address may stop working in a month or two, so update email to one that will continue working. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2011-03-16Squashfs: handle corruption of directory structurePhillip Lougher1-0/+12
Handle the rare case where a directory metadata block is uncompressed and corrupted, leading to a kernel oops in directory scanning (memcpy). Normally corruption is detected at the decompression stage and dealt with then, however, this will not happen if: - metadata isn't compressed (users can optionally request no metadata compression), or - the compressed metadata block was larger than the original, in which case the uncompressed version was used, or - the data was corrupt after decompression This patch fixes this by adding some sanity checks against known maximum values. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2010-05-17squashfs: add xattr support configure optionPhillip Lougher1-0/+1
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2010-05-17squashfs: add new extended inode typesPhillip Lougher1-1/+4
Add new extended inode types that store the xattr_id field. Also add the necessary code changes to make xattrs visibile. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2010-01-20Squashfs: factor out remaining zlib dependencies into separate wrapper filePhillip Lougher1-1/+0
Move zlib buffer init/destroy code into separate wrapper file. Also make zlib z_stream field a void * removing the need to include zlib.h for most files. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: directory lookup operationsPhillip Lougher1-0/+242
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
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