linux-kernel - [PATCH v2 2/3] mm: don't account memmap on failure

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240807211929.3433304-3-pasha.tatashin@soleen.com>
Date: Wed,  7 Aug 2024 21:19:28 +0000
From: Pasha Tatashin <pasha.tatashin@...een.com>
To: akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	cerasuolodomenico@...il.com,
	hannes@...xchg.org,
	j.granados@...sung.com,
	lizhijian@...itsu.com,
	muchun.song@...ux.dev,
	nphamcs@...il.com,
	pasha.tatashin@...een.com,
	rientjes@...gle.com,
	rppt@...nel.org,
	souravpanda@...gle.com,
	vbabka@...e.cz,
	willy@...radead.org
Subject: [PATCH v2 2/3] mm: don't account memmap on failure

When in alloc_vmemmap_page_list() memmap is failed to allocate, do
not account, the memory is going to be release at the function exit.

Fixes: 15995a352474 ("mm: report per-page metadata information")
Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>
---
 mm/hugetlb_vmemmap.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index fa83a7b38199..70027869d844 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -392,13 +392,10 @@ static int alloc_vmemmap_page_list(unsigned long start, unsigned long end,
 
 	for (i = 0; i < nr_pages; i++) {
 		page = alloc_pages_node(nid, gfp_mask, 0);
-		if (!page) {
-			mod_node_page_state(NODE_DATA(nid), NR_MEMMAP, i);
+		if (!page)
 			goto out;
-		}
 		list_add(&page->lru, list);
 	}
-
 	mod_node_page_state(NODE_DATA(nid), NR_MEMMAP, nr_pages);
 
 	return 0;
-- 
2.46.0.76.ge559c4bf1a-goog