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(parent: 08e1900) | 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 21:32:53 +0000 (13:32 -0800)
commit89dc7fe16538f3da6be9e48edb845a590e2020de
treefb33b72282416b4aac22fd7cb17cb74a23bb594btree | snapshot
parent08e1900472d65f78afd31761eaa349f15d9a4c1ecommit | 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
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