| From | Andi Kleen <> | Subject | [PATCH] [5/223] block: check for proper length of iov entries in blk_rq_map_user_iov() | Date | Mon, 13 Dec 2010 00:44:59 +0100 (CET) |
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2.6.35-longterm review patch. If anyone has any objections, please let me know.
------------------ From: Jens Axboe <jaxboe@fusionio.com>
commit 9284bcf4e335e5f18a8bc7b26461c33ab60d0689 upstream.
Ensure that we pass down properly validated iov segments before calling into the mapping or copy functions.
Reported-by: Dan Rosenberg <drosenberg@vsecurity.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- block/blk-map.c | 2 ++ 1 file changed, 2 insertions(+)
Index: linux/block/blk-map.c =================================================================== --- linux.orig/block/blk-map.c +++ linux/block/blk-map.c @@ -205,6 +205,8 @@ int blk_rq_map_user_iov(struct request_q unaligned = 1; break; } + if (!iov[i].iov_len) + return -EINVAL; } if (unaligned || (q->dma_pad_mask & len) || map_data)
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