linux.git/fs/squashfs/super.c, branch v3.0.48

Squashfs: fix mount time sanity check for corrupted superblock

2012-10-02T16:47:54+00:00

commit cc37f75a9ffbbfcb1c3297534f293c8284e3c5a6 upstream.

A Squashfs filesystem containing nothing but an empty directory,
although unusual and ultimately pointless, is still valid.

The directory_table >= next_table sanity check rejects these
filesystems as invalid because the directory_table is empty and
equal to next_table.

Signed-off-by: Phillip Lougher 
Cc: Geert Uytterhoeven 
Signed-off-by: Greg Kroah-Hartman

Squashfs: Fix sanity check patches on big-endian systems

2011-05-29T09:03:09+00:00

le64 values should be swapped when accessing on
big-endian systems.

Signed-off-by: Phillip Lougher

Squashfs: update email address

2011-05-26T09:49:11+00:00

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

Squashfs: add extra sanity checks at mount time

2011-05-25T17:21:33+00:00

Add some extra sanity checks of the inode and directory structures.

Signed-off-by: Phillip Lougher

Squashfs: add sanity checks to fragment reading at mount time

2011-05-25T17:21:33+00:00

Fsfuzzer generates corrupted filesystems which throw a warn_on in
kmalloc.  One of these is due to a corrupted superblock fragments field.
Fix this by checking that the number of bytes to be read (and allocated)
does not extend into the next filesystem structure.

Also add a couple of other sanity checks of the mount-time fragment table
structures.

Signed-off-by: Phillip Lougher

Squashfs: add sanity checks to lookup table reading at mount time

2011-05-25T17:21:32+00:00

Fsfuzzer generates corrupted filesystems which throw a warn_on in
kmalloc.  One of these is due to a corrupted superblock inodes field.
Fix this by checking that the number of bytes to be read (and allocated)
does not extend into the next filesystem structure.

Also add a couple of other sanity checks of the mount-time lookup table
structures.

Signed-off-by: Phillip Lougher

Squashfs: add sanity checks to id reading at mount time

2011-05-25T17:21:32+00:00

Fsfuzzer generates corrupted filesystems which throw a warn_on in
kmalloc.  One of these is due to a corrupted superblock no_ids field.
Fix this by checking that the number of bytes to be read (and allocated)
does not extend into the next filesystem structure.

Also add a couple of other sanity checks of the mount-time id table
structures.

Signed-off-by: Phillip Lougher

Squashfs: reverse order of filesystem table reading

2011-05-25T17:21:31+00:00

Reverse order of table reading from mostly first to last in placement
order, to last to first.  This is to enable extra superblock sanity
checks to be added in later patches.

Signed-off-by: Phillip Lougher

Squashfs: move table allocation into squashfs_read_table()

2011-05-25T17:21:31+00:00

This eliminates a lot of duplicate code.

Signed-off-by: Phillip Lougher

Squashfs: wrap squashfs_mount() definition

2011-02-28T18:43:48+00:00

Squashfs_get_sb() to squashfs_mount() conversion (commit 152a0836)
results in line over 80 characters.

Signed-off-by: Phillip Lougher