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From:   hackyzh002 <hackyzh002@gmail.com>
To:     alexander.deucher@amd.com
Cc:     christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com,
        daniel@ffwll.ch, sumit.semwal@linaro.org,
        amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
        linaro-mm-sig@lists.linaro.org, hackyzh002 <hackyzh002@gmail.com>
Subject: [PATCH v2 1/2] drm/radeon: Fix integer overflow in radeon_cs_parser_init
Date:   Wed, 19 Apr 2023 16:57:47 +0800
Message-Id: <20230419085747.4720-1-hackyzh002@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

The type of size is unsigned, if size is 0x40000000, there will be an
integer overflow, size will be zero after size *= sizeof(uint32_t),
will cause uninitialized memory to be referenced later

Signed-off-by: hackyzh002 <hackyzh002@gmail.com>
---
 drivers/gpu/drm/radeon/radeon_cs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index 46a27ebf4..8e12b406e 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -270,7 +270,7 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
 {
 	struct drm_radeon_cs *cs = data;
 	uint64_t *chunk_array_ptr;
-	unsigned size, i;
+	u64 size, i;
 	u32 ring = RADEON_CS_RING_GFX;
 	s32 priority = 0;
 
-- 
2.34.1