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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-28 18:05:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-28 18:05:54 -0700
commit8563f8786ee389c7861938d1d25336706f6de187 (patch)
treeaba82cbaa5111ec9a55b5e25add4fdb7100f6720 /fs/squashfs/super.c
parent532bfc851a7475fb6a36c1e953aa395798a7cca7 (diff)
parent4b0180a49f08dd1c681cdc99edc9e0cec0a833fa (diff)
Merge tag 'squashfs-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next
Pull squashfs updates from Phillip Lougher: "Add an extra mount time sanity check, plus some code cleanups and bug fixes." * tag 'squashfs-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next: Squashfs: add mount time sanity check for block_size and block_log match Squashfs: fix f_pos check in get_dir_index_using_offset Squashfs: get rid of obsolete definitions in header file Squashfs: remove redundant length initialisation in squashfs_lookup Squashfs: remove redundant length initialisation in squashfs_readdir Squashfs: update comment removing reference to zlib only Squashfs: use define instead of constant
Diffstat (limited to 'fs/squashfs/super.c')
-rw-r--r--fs/squashfs/super.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 970b1167e7c..29cd014ed3a 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -158,10 +158,15 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount;
}
+ /* Check block log for sanity */
msblk->block_log = le16_to_cpu(sblk->block_log);
if (msblk->block_log > SQUASHFS_FILE_MAX_LOG)
goto failed_mount;
+ /* Check that block_size and block_log match */
+ if (msblk->block_size != (1 << msblk->block_log))
+ goto failed_mount;
+
/* Check the root inode for sanity */
root_inode = le64_to_cpu(sblk->root_inode);
if (SQUASHFS_INODE_OFFSET(root_inode) > SQUASHFS_METADATA_SIZE)