]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
limit minixfs printks on corrupted dir i_size
authorEric Sandeen <sandeen@redhat.com>
Wed, 17 Oct 2007 06:27:15 +0000 (23:27 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Wed, 17 Oct 2007 15:42:53 +0000 (08:42 -0700)
commitf44ec6f3f89889a469773b1fd894f8fcc07c29cf
tree3b58f7b094e61c02536c7414906d7e29190979de
parentd8ea6cf89991000ae458e34e36379814cf202555
limit minixfs printks on corrupted dir i_size

This attempts to address CVE-2006-6058
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6058

first reported at http://projects.info-pull.com/mokb/MOKB-17-11-2006.html

Essentially a corrupted minix dir inode reporting a very large
i_size will loop for a very long time in minix_readdir, minix_find_entry,
etc, because on EIO they just move on to try the next page.  This is
under the BKL, printk-storming as well.  This can lock up the machine
for a very long time.  Simply ratelimiting the printks gets things back
under control.  Make the message a bit more informative while we're here.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Cc: Bodo Eggert <7eggert@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/minix/itree_v1.c
fs/minix/itree_v2.c