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Date: Fri, 3 Jun 2022 19:39:31 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Haimin Zhang <tcs.kernel@...il.com>, Chaitanya Kulkarni <kch@...dia.com>, Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>, Dragos-Marian Panait <dragos.panait@...driver.com> Subject: [PATCH 4.9 05/12] block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern From: Haimin Zhang <tcs.kernel@...il.com> 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 <tcs.kernel@...il.com> Reviewed-by: Chaitanya Kulkarni <kch@...dia.com> Reviewed-by: Christoph Hellwig <hch@....de> Link: https://lore.kernel.org/r/20220216084038.15635-1-tcs.kernel@gmail.com Signed-off-by: Jens Axboe <axboe@...nel.dk> [DP: Backported to 4.19: Manually added __GFP_ZERO flag] Signed-off-by: Dragos-Marian Panait <dragos.panait@...driver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- block/bio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/block/bio.c +++ b/block/bio.c @@ -1538,7 +1538,7 @@ struct bio *bio_copy_kern(struct request 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;
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