From c7337efd1d11acb6f84c68ffee57d3f312e87b24 Mon Sep 17 00:00:00 2001 From: Haimin Zhang Date: Wed, 16 Feb 2022 16:40:38 +0800 Subject: [PATCH] block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern commit cc8f7fe1f5eab010191aa4570f27641876fa1267 upstream. Add __GFP_ZERO flag for alloc_page in function bio_copy_kern to initialize the buffer of a bio. Signed-off-by: Haimin Zhang Reviewed-by: Chaitanya Kulkarni Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20220216084038.15635-1-tcs.kernel@gmail.com Signed-off-by: Jens Axboe [nobelbarakat: Backported to 5.4: Manually added __GFP_ZERO flag] Signed-off-by: Nobel Barakat Signed-off-by: Greg Kroah-Hartman --- block/bio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/bio.c b/block/bio.c index 1c52d0196e15..40004a3631a8 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1627,7 +1627,7 @@ struct bio *bio_copy_kern(struct request_queue *q, void *data, unsigned int len, if (bytes > len) bytes = len; - page = alloc_page(q->bounce_gfp | gfp_mask); + page = alloc_page(q->bounce_gfp | __GFP_ZERO | gfp_mask); if (!page) goto cleanup;