linux-kernel - [PATCH] drm/amdgpu: use kmalloc

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Message-ID: <20250616025559.2766331-1-jiangyunshui@kylinos.cn>
Date: Mon, 16 Jun 2025 10:55:59 +0800
From: Yunshui Jiang <jiangyunshui@...inos.cn>
To: alexander.deucher@....com,
	chriistian.koenig@....com
Cc: linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Yunshui Jiang <jiangyunshui@...inos.cn>
Subject: [PATCH] drm/amdgpu: use kmalloc_array() instead of kmalloc()

Use kmalloc_array() instead of kmalloc() with multiplication.
kmalloc_array() is a safer way because of its multiply overflow check.

Signed-off-by: Yunshui Jiang <jiangyunshui@...inos.cn>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index de0944947eaf..ab02011842e4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -2563,7 +2563,7 @@ static int amdgpu_ras_badpages_read(struct amdgpu_device *adev,
 		goto out;
 	}
 
-	*bps = kmalloc(sizeof(struct ras_badpage) * data->count, GFP_KERNEL);
+	*bps = kmalloc_array(data->count, sizeof(struct ras_badpage), GFP_KERNEL);
 	if (!*bps) {
 		ret = -ENOMEM;
 		goto out;
@@ -2719,7 +2719,7 @@ static int amdgpu_ras_realloc_eh_data_space(struct amdgpu_device *adev,
 	unsigned int old_space = data->count + data->space_left;
 	unsigned int new_space = old_space + pages;
 	unsigned int align_space = ALIGN(new_space, 512);
-	void *bps = kmalloc(align_space * sizeof(*data->bps), GFP_KERNEL);
+	void *bps = kmalloc(align_space, sizeof(*data->bps), GFP_KERNEL);
 
 	if (!bps) {
 		return -ENOMEM;
-- 
2.47.1