Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/amdgpu/mmhub4.2.0: add bounds checking for cid
The value should never exceed the array size as those
are the only values the hardware is expected to return,
but add checks anyway.
Reviewed-by: Benjamin Cheng <benjamin.cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit dea5f235baf3786bfd4fd920b03c19285fdc3d9f)
Cc: stable@vger.kernel.org
+2
-1
+2
-1
drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c
+2
-1
drivers/gpu/drm/amd/amdgpu/mmhub_v4_2_0.c
···
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688
status);
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switch (amdgpu_ip_version(adev, MMHUB_HWIP, 0)) {
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case IP_VERSION(4, 2, 0):
691
-
mmhub_cid = mmhub_client_ids_v4_2_0[cid][rw];
691
+
mmhub_cid = cid < ARRAY_SIZE(mmhub_client_ids_v4_2_0) ?
692
+
mmhub_client_ids_v4_2_0[cid][rw] : NULL;
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break;
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default:
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mmhub_cid = NULL;