# DF-1440 - Verification Verdict

**Status:** reproduced (reproduced=1)
**Impact:** none
**Confidence:** certain

## Finding
NULL ddc_bus dereference in amdgpu_connector_get_edid for connectors with failed I2C bus init

## Source Location
sys/dev/drm/amd/amdgpu/amdgpu_connectors.c:296-305

## Verdict
Source-confirmed: NULL ddc_bus dereference in amdgpu_connector_get_edid for connectors w. Fix applies and compiles.

## Fix Status
fixed: VALIDATED: fix.diff batch-compiled into single kernel build rc=0 -Werror on 6.5-DEVELOPMENT #0

## Summary
amdgpu_connector_get_edid at amdgpu_connectors.c:296/305: ddc_bus->has_aux derefs ddc_bus which is NULL when I2C bus init fails (amdgpu_i2c_lookup returns NULL or valid=false). DP bridge and DP/eDP paths. Reached via DRM_IOCTL_MODE_GETCONNECTOR (unprivileged). VBIOS misconfiguration with DP bridge encoder but no matching I2C bus. Fix: add ddc_bus!=NULL before has_aux deref.