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drm/amdgpu: fix a possible null pointer dereference

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In amdgpu_connector_add_common_modes(), the return value of drm_cvt_mode()
is assigned to mode, which will lead to a NULL pointer dereference on
failure of drm_cvt_mode(). Add a check to avoid npd.

Cc: stable@vger.kernel.org
Fixes: d38ceaf99e ("drm/amdgpu: add core driver (v4)")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ma Ke 2024-07-18 22:11:41 +08:00 committed by Alex Deucher
parent 666f14cab2
commit 93381e6b61
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
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@ -442,6 +442,9 @@ static void amdgpu_connector_add_common_modes(struct drm_encoder *encoder,
continue;
mode = drm_cvt_mode(dev, common_modes[i].w, common_modes[i].h, 60, false, false, false);
if (!mode)
return;
drm_mode_probed_add(connector, mode);
}
}