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Message-Id: <20101212234459.F3AFDB27BF@basil.firstfloor.org> Date: Mon, 13 Dec 2010 00:44:59 +0100 (CET) From: Andi Kleen <andi@...stfloor.org> To: jaxboe@...ionio.com, gregkh@...e.de, ak@...ux.intel.com, linux-kernel@...r.kernel.org, stable@...nel.org Subject: [PATCH] [5/223] block: check for proper length of iov entries in blk_rq_map_user_iov() 2.6.35-longterm review patch. If anyone has any objections, please let me know. ------------------ From: Jens Axboe <jaxboe@...ionio.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@...curity.com> Signed-off-by: Jens Axboe <jaxboe@...ionio.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> Signed-off-by: Andi Kleen <ak@...ux.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) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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