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drm: Warn if mode to umode conversion overflows the destination types
When converting from a drm_display_mode to drm_mode_modeinfo, print a warning if the the timings values don't fit into the __u16 datatype. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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2fcfc75b11
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e36fae3889
drivers/gpu/drm
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@ -1002,6 +1002,13 @@ EXPORT_SYMBOL(drm_mode_config_cleanup);
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void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
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struct drm_display_mode *in)
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{
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WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
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in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
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in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
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in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
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in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
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"timing values too large for mode info\n");
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out->clock = in->clock;
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out->hdisplay = in->hdisplay;
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out->hsync_start = in->hsync_start;
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