Hello,
Our static analysis tool finds some possible null-pointer dereferences
in the amdgpu driver in Linux 5.14.0-rc3:
In dce_v10_0.c:
The variable encoder->crtc is checked in:
1591: if (encoder->crtc)
This indicates that encoder->crtc can be NULL.
Then the function dce_v10_0_audio_set_dto() is called with the argument
encoder:
1600: ce_v10_0_audio_set_dto(encoder, mode->clock);
However, encoder->crtc is dereferenced in this function:
1545: struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(encoder->crtc);
1559: tmp = REG_SET_FIELD(tmp, DCCG_AUDIO_DTO_SOURCE,
DCCG_AUDIO_DTO0_SOURCE_SEL, amdgpu_crtc->crtc_id);
In dce_v11_0.c and dce_v8_0.c, situations are the same.
I am not quite sure whether these possible null-pointer dereferences are
real and how to fix them if they are real.
Any feedback would be appreciated, thanks!
Reported-by: TOTE Robot <oslab@xxxxxxxxxxxxxxx>
Best wishes,
Tuo Li
