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drm/amdgpu: Fix potential NULL pointer dereference in atomctrl_get_smc_sclk_range_table

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BugLink: https://bugs.launchpad.net/bugs/2111953

[ Upstream commit 357445e28ff004d7f10967aa93ddb4bffa5c3688 ]

The function atomctrl_get_smc_sclk_range_table() does not check the return
value of smu_atom_get_data_table(). If smu_atom_get_data_table() fails to
retrieve SMU_Info table, it returns NULL which is later dereferenced.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

In practice this should never happen as this code only gets called
on polaris chips and the vbios data table will always be present on
those chips.

Fixes: a23eefa2f4 ("drm/amd/powerplay: enable dpm for baffin.")
Signed-off-by: Ivan Stepchenko <sid@itb.spb.ru>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
CVE-2024-58052
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Ivan Stepchenko
2024-12-02 11:00:43 +03:00
committed by Mehmet Basaran
parent 90fb5c7d7f
commit 6f5ecf7718
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c
+2
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@@ -1420,6 +1420,8 @@ int atomctrl_get_smc_sclk_range_table(struct pp_hwmgr *hwmgr, struct pp_atom_ctr
GetIndexIntoMasterTable(DATA, SMU_Info),
&size, &frev, &crev);
if (!psmu_info)
return -EINVAL;
for (i = 0; i < psmu_info->ucSclkEntryNum; i++) {
table->entry[i].ucVco_setting = psmu_info->asSclkFcwRangeEntry[i].ucVco_setting;