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 <[email protected]> Reviewed-by: Chaitanya Kulkarni <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jens Axboe <[email protected]> [DP: Backported to 4.19: Manually added __GFP_ZERO flag] Signed-off-by: Dragos-Marian Panait <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
javashin · Jun 6, 2022 · 18243d8 · 18243d8
1 parent fa6d61d
commit 18243d8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/block/bio.c b/block/bio.c
@@ -1528,7 +1528,7 @@ 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;