Potential NULL pointer deference in drm/amdgpu

From: Yizhuo Zhai
Date: Thu Oct 10 2019 - 01:10:22 EST


Hi All:
drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:
The function to_amdgpu_fence() could return NULL, but callers
in this file does not check the return value but directly dereference it,
which seems potentially unsafe.
Such callers include amdgpu_fence_get_timeline_name(),
amdgpu_fence_enable_signaling() and amdgpu_fence_free().


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Kind Regards,

Yizhuo Zhai

Computer Science, Graduate Student
University of California, Riverside