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drm/amdgpu: Use kvfree instead of kfree in amdgpu_gmc_get_nps_memranges()

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amdgpu_discovery_get_nps_info() internally allocates memory for ranges
using kvcalloc(), which may use vmalloc() for large allocation. Using
kfree() to release vmalloc memory will lead to a memory corruption.

Use kvfree() to safely handle both kmalloc and vmalloc allocations.

Compile tested only. Issue found using a prototype static analysis tool
and code review.

Fixes: b194d21b9b ("drm/amdgpu: Use NPS ranges from discovery table")
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Zilin Guan <zilin@seu.edu.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Zilin Guan 2026-01-29 09:05:42 +00:00 committed by Alex Deucher
parent c9be63d565
commit 0c44d61945
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
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@ -1436,7 +1436,7 @@ int amdgpu_gmc_get_nps_memranges(struct amdgpu_device *adev,
if (!*exp_ranges)
*exp_ranges = range_cnt;
err:
kfree(ranges);
kvfree(ranges);
return ret;
}