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(parent: a7c486e) | patch
bio: take care not overflow page count when mapping/copying user data
authorJens Axboe <jaxboe@fusionio.com>
Wed, 10 Nov 2010 13:36:25 +0000 (14:36 +0100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Thu, 9 Dec 2010 21:26:52 +0000 (13:26 -0800)
commitcbe7684480e2b379eeae1317b6aa7fab413501a8
treeb1d9309f6715ca81e73185a2da66fdad57000ccatree | snapshot
parenta7c486e4d247d5a076b6f94937ac402f4ac9c70bcommit | diff
bio: take care not overflow page count when mapping/copying user data

commit cb4644cac4a2797afc847e6c92736664d4b0ea34 upstream.

If the iovec is being set up in a way that causes uaddr + PAGE_SIZE
to overflow, we could end up attempting to map a huge number of
pages. Check for this invalid input type.

Reported-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
fs/bio.c diff | blob | history
Linux kernel for KaRo TX COM modules