CVE-2022-50844: In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix type of second parameter in odn_edit_dpm_table() callback With clang's…

PriorityP423low2.5

EPSS

0.21%

11.1th percentile

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix type of second parameter in odn_edit_dpm_table() callback With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. A proposed warning in clang aims to catch these at compile time, which reveals: drivers/gpu/drm/amd/amdgpu/../pm/swsmu/amdgpu_smu.c:3008:29: error: incompatible function pointer types initializing 'int (*)(void *, uint32_t, long *, uint32_t)' (aka 'int (*)(void *, unsigned int, long *, unsigned int)') with an expression of type 'int (void *, enum PP_OD_DPM_TABLE_COMMAND, long *, uint32_t)' (aka 'int (void *, enum PP_OD_DPM_TABLE_COMMAND, long *, unsigned int)') [-Werror,-Wincompatible-function-pointer-types-strict] .odn_edit_dpm_table = smu_od_edit_dpm_table, ^~~~~~~~~~~~~~~~~~~~~ 1 error generated. There are only two implementations of ->odn_edit_dpm_table() in 'struct amd_pm_funcs': smu_od_edit_dpm_table() and pp_odn_edit_dpm_table(). One has a second parameter type of 'enum PP_OD_DPM_TABLE_COMMAND' and the other uses 'u32'. Ultimately, smu_od_edit_dpm_table() calls ->od_edit_dpm_table() from 'struct pptable_funcs' and pp_odn_edit_dpm_table() calls ->odn_edit_dpm_table() from 'struct pp_hwmgr_func', which both have a second parameter type of 'enum PP_OD_DPM_TABLE_COMMAND'. Update the type parameter in both the prototype in 'struct amd_pm_funcs' and pp_odn_edit_dpm_table() to 'enum PP_OD_DPM_TABLE_COMMAND', which cleans up the warning.

Affected

13 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.1.4-1 (bookworm)	linux 6.1.4-1 (bookworm)
linux	linux	—	—
linux	linux	>= 8f4828d0a104d961d5eb850d0aef1530fc24e370 < f9084e9930db562bdcd47fa199a66fb45e16dab5	f9084e9930db562bdcd47fa199a66fb45e16dab5
linux	linux	>= 8f4828d0a104d961d5eb850d0aef1530fc24e370 < 24cba9d865157c9e23128fbcf8b86f5da9570edd	24cba9d865157c9e23128fbcf8b86f5da9570edd
linux	linux	>= 8f4828d0a104d961d5eb850d0aef1530fc24e370 < 36217f676b55932a12d6732c95388150015fdee6	36217f676b55932a12d6732c95388150015fdee6
linux	linux	>= 8f4828d0a104d961d5eb850d0aef1530fc24e370 < e4d0ef752081e7aa6ffb7ccac11c499c732a2e05	e4d0ef752081e7aa6ffb7ccac11c499c732a2e05
linux	linux_kernel	>= 0 < 5.10.178-1	5.10.178-1
linux	linux_kernel	>= 0 < 6.1.4-1	6.1.4-1
linux	linux_kernel	>= 0 < 6.1.4-1	6.1.4-1
linux	linux_kernel	>= 0 < 6.1.4-1	6.1.4-1
linux	linux_kernel	>= 5.13.0 < 5.15.86	5.15.86
linux	linux_kernel	>= 5.16.0 < 6.0.16	6.0.16
linux	linux_kernel	>= 6.1.0 < 6.1.2	6.1.2

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