Messages in this thread Patch in this message |  | | From | Ivan Stepchenko <> | | Subject | [PATCH] drm: amd: Fix potential NULL pointer dereference in atomctrl_get_smc_sclk_range_table | | Date | Mon, 2 Dec 2024 11:00:43 +0300 |
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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.
Fixes: a23eefa2f461 ("drm/amd/powerplay: enable dpm for baffin.") Cc: stable@vger.kernel.org Signed-off-by: Ivan Stepchenko <sid@itb.spb.ru> --- drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c index fe24219c3bf4..4bd92fd782be 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c @@ -992,6 +992,8 @@ 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; -- 2.34.1
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