From 742b42b9e87b64b2d2b54826dd3761897e71502d Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Sun, 13 Nov 2011 19:58:09 +0100 Subject: [PATCH] block: Always check length of all iov entries in blk_rq_map_user_iov() commit 6b76106d8ef31111d6fc469564b83b5f5542794f upstream. Even after commit 5478755616ae2ef1ce144dded589b62b2a50d575 ("block: check for proper length of iov entries earlier ...") we still won't check for zero-length entries after an unaligned entry. Remove the break-statement, so all entries are checked. Signed-off-by: Ben Hutchings Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- block/blk-map.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/block/blk-map.c b/block/blk-map.c index e663ac2d8e68..164cd0059706 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -204,10 +204,11 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, if (!iov[i].iov_len) return -EINVAL; - if (uaddr & queue_dma_alignment(q)) { + /* + * Keep going so we check length of all segments + */ + if (uaddr & queue_dma_alignment(q)) unaligned = 1; - break; - } } if (unaligned || (q->dma_pad_mask & len) || map_data) -- 2.39.5