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Message-ID: <20240728154230.2046786-11-sashal@kernel.org>
Date: Sun, 28 Jul 2024 11:40:35 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Jesse Zhang <jesse.zhang@....com>,
Jesse Zhang <Jesse.Zhang@....com>,
Tim Huang <Tim.Huang@....com>,
Alex Deucher <alexander.deucher@....com>,
Sasha Levin <sashal@...nel.org>,
christian.koenig@....com,
Xinhui.Pan@....com,
airlied@...il.com,
daniel@...ll.ch,
Hawking.Zhang@....com,
Stanley.Yang@....com,
amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.10 11/34] drm/admgpu: fix dereferencing null pointer context
From: Jesse Zhang <jesse.zhang@....com>
[ Upstream commit 030ffd4d43b433bc6671d9ec34fc12c59220b95d ]
When user space sets an invalid ta type, the pointer context will be empty.
So it need to check the pointer context before using it
Signed-off-by: Jesse Zhang <Jesse.Zhang@....com>
Suggested-by: Tim Huang <Tim.Huang@....com>
Reviewed-by: Tim Huang <Tim.Huang@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
index ca5c86e5f7cd6..8e8afbd237bcd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
@@ -334,7 +334,7 @@ static ssize_t ta_if_invoke_debugfs_write(struct file *fp, const char *buf, size
set_ta_context_funcs(psp, ta_type, &context);
- if (!context->initialized) {
+ if (!context || !context->initialized) {
dev_err(adev->dev, "TA is not initialized\n");
ret = -EINVAL;
goto err_free_shared_buf;
--
2.43.0
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