+ relay-use-kvcalloc-to-alloc-page-array-in-relay_alloc_page_array.patch added to mm-nonmm-unstable branch

+ relay-use-kvcalloc-to-alloc-page-array-in-relay_alloc_page_array.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: relay: use kvcalloc to alloc page array in relay_alloc_page_array
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     relay-use-kvcalloc-to-alloc-page-array-in-relay_alloc_page_array.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/relay-use-kvcalloc-to-alloc-page-array-in-relay_alloc_page_array.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: wuchi <wuchi.zero@gmail.com>
Subject: relay: use kvcalloc to alloc page array in relay_alloc_page_array
Date: Fri, 9 Sep 2022 18:10:25 +0800

kvcalloc() is safer because it will check the integer overflows, and using
it will simple the logic of allocation size.

Link: https://lkml.kernel.org/r/20220909101025.82955-1-wuchi.zero@gmail.com
Signed-off-by: wuchi <wuchi.zero@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/relay.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/kernel/relay.c~relay-use-kvcalloc-to-alloc-page-array-in-relay_alloc_page_array
+++ a/kernel/relay.c
@@ -60,10 +60,7 @@ static const struct vm_operations_struct
  */
 static struct page **relay_alloc_page_array(unsigned int n_pages)
 {
-	const size_t pa_size = n_pages * sizeof(struct page *);
-	if (pa_size > PAGE_SIZE)
-		return vzalloc(pa_size);
-	return kzalloc(pa_size, GFP_KERNEL);
+	return kvcalloc(n_pages, sizeof(struct page *), GFP_KERNEL);
 }
 
 /*
_

Patches currently in -mm which might be from wuchi.zero@gmail.com are

lib-debugobjects-fix-stat-count-and-optimize-debug_objects_mem_init.patch
initramfs-mask-my_inptr-as-__initdata.patch
profile-simplify-redundant-code-in-profile_setup.patch
latencytop-use-the-last-element-of-latency_record-of-system.patch
relay-use-kvcalloc-to-alloc-page-array-in-relay_alloc_page_array.patch