From e7b8b3c5b2a65595d506ffedafac66f0a11fbdc2 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 7 May 2026 07:01:48 +0200 Subject: [PATCH] block: align down bounces bios Just like for the extract user pages path, we need to align down the size to the supported boundary. Fixes: 8dd5e7c75d7b ("block: add helpers to bounce buffer an iov_iter into bios") Signed-off-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Link: https://patch.msgid.link/20260507050153.1298375-3-hch@lst.de Signed-off-by: Jens Axboe --- block/bio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/bio.c b/block/bio.c index f3e5d8bea08c..5f10900b3f42 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1345,7 +1345,7 @@ static int bio_iov_iter_bounce_write(struct bio *bio, struct iov_iter *iter, if (!bio->bi_iter.bi_size) return -ENOMEM; - return 0; + return bio_iov_iter_align_down(bio, iter, minsize - 1); } static int bio_iov_iter_bounce_read(struct bio *bio, struct iov_iter *iter, @@ -1383,7 +1383,7 @@ static int bio_iov_iter_bounce_read(struct bio *bio, struct iov_iter *iter, bvec_set_folio(&bio->bi_io_vec[0], folio, bio->bi_iter.bi_size, 0); if (iov_iter_extract_will_pin(iter)) bio_set_flag(bio, BIO_PAGE_PINNED); - return 0; + return bio_iov_iter_align_down(bio, iter, minsize - 1); } /**