Commit fc0e982b authored by Ming Lei's avatar Ming Lei Committed by Jens Axboe
Browse files

block: make sure ->nr_integrity_segments is cloned in blk_rq_prep_clone 



Make sure ->nr_integrity_segments is cloned in blk_rq_prep_clone(),
otherwise requests cloned by device-mapper multipath will not have the
proper nr_integrity_segments values set, then BUG() is hit from
sg_alloc_table_chained().

Fixes: b0fd271d ("block: add request clone interface (v2)")
Cc: stable@vger.kernel.org
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: default avatarMing Lei <ming.lei@redhat.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20250310115453.2271109-1-ming.lei@redhat.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 5abba4ce

block/blk-mq.c

+1 −0
Original line number Diff line number Diff line
@@ -3314,6 +3314,7 @@ int blk_rq_prep_clone(struct request *rq, struct request *rq_src, 
		rq->special_vec = rq_src->special_vec;

	}

	rq->nr_phys_segments = rq_src->nr_phys_segments;

	rq->nr_integrity_segments = rq_src->nr_integrity_segments;



	if (rq->bio && blk_crypto_rq_bio_prep(rq, rq->bio, gfp_mask) < 0)

		goto free_and_out;