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(parent: 2794a71) | patch
ext4: validate that metadata blocks do not overlap superblock
authorTheodore Ts'o <tytso@mit.edu>
Mon, 1 Aug 2016 04:51:02 +0000 (00:51 -0400)
committerJiri Slaby <jslaby@suse.cz>
Thu, 29 Sep 2016 09:14:05 +0000 (11:14 +0200)
commit672a020d4a85288c58e73727d8a6561d83f60dad
treefe5f48e33c3b70090b6cf430f16864c2ba971096tree | snapshot
parent2794a7141faccd80f81938b7af781e83b7ff136bcommit | diff
ext4: validate that metadata blocks do not overlap superblock

commit 829fa70dddadf9dd041d62b82cd7cea63943899d upstream.

A number of fuzzing failures seem to be caused by allocation bitmaps
or other metadata blocks being pointed at the superblock.

This can cause kernel BUG or WARNings once the superblock is
overwritten, so validate the group descriptor blocks to make sure this
doesn't happen.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
fs/ext4/super.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git