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-next>] [day] [month] [year] [list]
Date: Fri,  9 Feb 2024 12:20:36 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-mm@...ck.org
Cc: Anshuman Khandual <anshuman.khandual@....com>,
	Muchun Song <muchun.song@...ux.dev>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mm/hugetlb: Ensure adequate CMA areas available for hugetlb_cma[]

HugeTLB CMA area array is being created for possible MAX_NUMNODES without
ensuring corresponding MAX_CMA_AREAS support in CMA. Let's just warn for
such scenarios indicating need for CONFIG_CMA_AREAS adjustment.

Cc: Muchun Song <muchun.song@...ux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
This applies on v6.8-rc3

 mm/hugetlb.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index a188b7c60f4f..fda8ced69832 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -7750,6 +7750,13 @@ void __init hugetlb_cma_reserve(int order)
 	}
 
 	reserved = 0;
+
+	/*
+	 * There needs to be enough MAX_CMA_AREAS to accommodate
+	 * MAX_NUMNODES heap areas being created here. Otherwise
+	 * adjust CONFIG_CMA_AREAS as required.
+	 */
+	VM_WARN_ON(MAX_CMA_AREAS < MAX_NUMNODES);
 	for_each_online_node(nid) {
 		int res;
 		char name[CMA_MAX_NAME];
-- 
2.25.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ