linux-kernel - [PATCH] slab: prevent warnings when allocating with __GFP

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:	Mon, 10 Jun 2013 15:18:00 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	penberg@...nel.org, cl@...ux.com
Cc:	linux-mm@...ck.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, Sasha Levin <sasha.levin@...cle.com>
Subject: [PATCH] slab: prevent warnings when allocating with __GFP_NOWARN

slab would still spew a warning when a big allocation happens with the
__GFP_NOWARN fleg is set. Prevent that to conform to __GFP_NOWARN.

Signed-off-by: Sasha Levin <sasha.levin@...cle.com>
---
 mm/slab_common.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/slab_common.c b/mm/slab_common.c
index ff3218a..2d41450 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -373,8 +373,10 @@ struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags)
 {
 	int index;
 
-	if (WARN_ON_ONCE(size > KMALLOC_MAX_SIZE))
+	if (size > KMALLOC_MAX_SIZE) {
+		WARN_ON_ONCE(!(flags & __GFP_NOWARN));
 		return NULL;
+	}
 
 	if (size <= 192) {
 		if (!size)
-- 
1.8.2.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/