From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> To: Catalin Marinas <catalin.marinas@arm.com> Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org> Subject: [PATCH] kmemleak: do not leak object after tree insertion error (v3) Date: Wed, 18 Apr 2012 18:44:48 +0300 [thread overview] Message-ID: <20120418154448.GA3617@swordfish.minsk.epam.com> (raw) [PATCH] kmemleak: do not leak object after tree insertion error In case when tree insertion fails due to already existing object error, pointer to allocated object gets lost because of overwrite with lookup_object() return. Free allocated object before object lookup. Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> --- mm/kmemleak.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/kmemleak.c b/mm/kmemleak.c index 45eb621..5f05993 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -578,6 +578,7 @@ static struct kmemleak_object *create_object(unsigned long ptr, size_t size, if (node != &object->tree_node) { kmemleak_stop("Cannot insert 0x%lx into the object search tree " "(already existing)\n", ptr); + kmem_cache_free(object_cache, object); object = lookup_object(ptr, 1); spin_lock(&object->lock); dump_object_info(object);
WARNING: multiple messages have this Message-ID (diff)
From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> To: Catalin Marinas <catalin.marinas@arm.com> Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org> Subject: [PATCH] kmemleak: do not leak object after tree insertion error (v3) Date: Wed, 18 Apr 2012 18:44:48 +0300 [thread overview] Message-ID: <20120418154448.GA3617@swordfish.minsk.epam.com> (raw) [PATCH] kmemleak: do not leak object after tree insertion error In case when tree insertion fails due to already existing object error, pointer to allocated object gets lost because of overwrite with lookup_object() return. Free allocated object before object lookup. Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> --- mm/kmemleak.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/kmemleak.c b/mm/kmemleak.c index 45eb621..5f05993 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -578,6 +578,7 @@ static struct kmemleak_object *create_object(unsigned long ptr, size_t size, if (node != &object->tree_node) { kmemleak_stop("Cannot insert 0x%lx into the object search tree " "(already existing)\n", ptr); + kmem_cache_free(object_cache, object); object = lookup_object(ptr, 1); spin_lock(&object->lock); dump_object_info(object); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2012-04-18 15:45 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-04-18 15:44 Sergey Senozhatsky [this message] 2012-04-18 15:44 ` [PATCH] kmemleak: do not leak object after tree insertion error (v3) Sergey Senozhatsky 2012-04-19 9:19 ` Catalin Marinas 2012-04-19 9:19 ` Catalin Marinas
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