ext2: add block bitmap validation
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Wed, 6 Feb 2008 09:40:08 +0000 (01:40 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Wed, 6 Feb 2008 18:41:20 +0000 (10:41 -0800)
commit01584fa6456dafbaf5a94ad7fb2aa3e3ecd7a7ba
tree8454d18e301e4a408236b22d91bf506fa90630fb
parent445a1d3e24b806bff01e422f0ddadf68e0eb5d0f
ext2: add block bitmap validation

When a new block bitmap is read from disk in read_block_bitmap() there are a
few bits that should ALWAYS be set.  In particular, the blocks given
corresponding to block bitmap, inode bitmap and inode tables.  Validate the
block bitmap against these blocks.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/ext2/balloc.c