6.14-stable review patch. If anyone has any objections, please let me know.
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From: Ming Lei ming.lei@redhat.com
commit fc0e982b8a3a169b1c654d9a1aa45bf292943ef2 upstream.
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: b0fd271d5fba ("block: add request clone interface (v2)") Cc: stable@vger.kernel.org Cc: Christoph Hellwig hch@infradead.org Signed-off-by: Ming Lei ming.lei@redhat.com Reviewed-by: Christoph Hellwig hch@lst.de Link: https://lore.kernel.org/r/20250310115453.2271109-1-ming.lei@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- block/blk-mq.c | 1 + 1 file changed, 1 insertion(+)
--- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3314,6 +3314,7 @@ int blk_rq_prep_clone(struct request *rq 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;