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drm/radeon: fix null pointer dereference in radeon_add_common_modes

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

Cc: stable@vger.kernel.org
Fixes: d50ba256b5 ("drm/kms: start adding command line interface using fb.")
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 21:13:29 +08:00 committed by Alex Deucher
parent a7e8467fbe
commit 7a38efeee6
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/radeon/radeon_connectors.c
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@ -505,6 +505,9 @@ static void radeon_add_common_modes(struct drm_encoder *encoder, struct drm_conn
continue;
mode = drm_cvt_mode(dev, common_modes[i].w, common_modes[i].h, 60, false, false, false);
if (!mode)
continue;
drm_mode_probed_add(connector, mode);
}
}