linux-kernel - [PATCH] drm/radeon: Use kcalloc instead of kzalloc to allocate array

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>] [day] [month] [year] [list]

Message-ID: <1322600880.1534.298.camel@localhost.localdomain>
Date:	Tue, 29 Nov 2011 22:08:00 +0100
From:	Thomas Meyer <thomas@...3r.de>
To:	airlied@...ux.ie, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/radeon: Use kcalloc instead of kzalloc to allocate
 array

The advantage of kcalloc is, that will prevent integer overflows which could
result from the multiplication of number of elements and size and it is also
a bit nicer to read.

The semantic patch that makes this change is available
in https://lkml.org/lkml/2011/11/25/107

Signed-off-by: Thomas Meyer <thomas@...3r.de>
---

diff -u -p a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c
--- a/drivers/gpu/drm/radeon/radeon_gart.c 2011-11-13 11:07:24.266787250 +0100
+++ b/drivers/gpu/drm/radeon/radeon_gart.c 2011-11-28 19:50:09.760213006 +0100
@@ -274,8 +274,8 @@ int radeon_gart_init(struct radeon_devic
 		radeon_gart_fini(rdev);
 		return -ENOMEM;
 	}
-	rdev->gart.ttm_alloced = kzalloc(sizeof(bool) *
-					 rdev->gart.num_cpu_pages, GFP_KERNEL);
+	rdev->gart.ttm_alloced = kcalloc(rdev->gart.num_cpu_pages,
+					 sizeof(bool), GFP_KERNEL);
 	if (rdev->gart.ttm_alloced == NULL) {
 		radeon_gart_fini(rdev);
 		return -ENOMEM;
diff -u -p a/drivers/gpu/drm/radeon/radeon_test.c b/drivers/gpu/drm/radeon/radeon_test.c
--- a/drivers/gpu/drm/radeon/radeon_test.c 2011-11-13 11:07:24.296787724 +0100
+++ b/drivers/gpu/drm/radeon/radeon_test.c 2011-11-28 19:50:16.026995920 +0100
@@ -49,7 +49,7 @@ void radeon_test_moves(struct radeon_dev
 		n -= rdev->ih.ring_size;
 	n /= size;
 
-	gtt_obj = kzalloc(n * sizeof(*gtt_obj), GFP_KERNEL);
+	gtt_obj = kcalloc(n, sizeof(*gtt_obj), GFP_KERNEL);
 	if (!gtt_obj) {
 		DRM_ERROR("Failed to allocate %d pointers\n", n);
 		r = 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/