linux-kernel - [PATCH] slab: Fix slab debug for non alien caches.

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20070601041317.GA8490@linux-sh.org>
Date:	Fri, 1 Jun 2007 13:13:17 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH] slab: Fix slab debug for non alien caches.

Currently when slab debugging is enabled, the WARN_ON() nodeid checks
trigger if we boot with 'noaliencache'. In the noaliencache case the
WARN_ON()'s seem to be superfluous, so only bother doing the nodeid
comparison if use_alien_caches is set.

Signed-off-by: Paul Mundt <lethal@...ux-sh.org>

--

 mm/slab.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index 2e71a32..88db26b 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2663,7 +2663,7 @@ static void *slab_get_obj(struct kmem_cache *cachep, struct slab *slabp,
 	next = slab_bufctl(slabp)[slabp->free];
 #if DEBUG
 	slab_bufctl(slabp)[slabp->free] = BUFCTL_FREE;
-	WARN_ON(slabp->nodeid != nodeid);
+	WARN_ON(use_alien_caches && slabp->nodeid != nodeid);
 #endif
 	slabp->free = next;

@@ -2677,7 +2677,7 @@ static void slab_put_obj(struct kmem_cache *cachep, struct slab *slabp,

 #if DEBUG
 	/* Verify that the slab belongs to the intended node */
-	WARN_ON(slabp->nodeid != nodeid);
+	WARN_ON(use_alien_caches && slabp->nodeid != nodeid);

 	if (slab_bufctl(slabp)[objnr] + 1 <= SLAB_LIMIT + 1) {
 		printk(KERN_ERR "slab: double free detected in cache "
-
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/