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Commit 60573b87 authored by Jens Axboe's avatar Jens Axboe
Browse files

[BLOCK] Clear sg entry before filling in blk_rq_map_sg() 



The memset() of the sg entry was originally removed, because it could
overwrite a chain pointer. But it's quite OK to memset() it when we know
it's a valid entry, since it can't contain a chain pointer.

Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent bdb02504

block/ll_rw_blk.c

+1 −0
Original line number Diff line number Diff line
@@ -1352,6 +1352,7 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq, 
			sg = next_sg;

			next_sg = sg_next(sg);



			memset(sg, 0, sizeof(*sg));

			sg->page = bvec->bv_page;

			sg->length = nbytes;

			sg->offset = bvec->bv_offset;