From: "Lin.Cao" lincao12@amd.com

[ Upstream commit 406e8845356d18bdf3d3a23b347faf67706472ec ]

In SR-IOV environment, the value of pcie_table->num_of_link_levels will be 0, and num_of_levels - 1 will cause array index out of bounds

Signed-off-by: Lin.Cao lincao12@amd.com Acked-by: Jingwen Chen Jingwen.Chen2@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com [ Resolve minor conflicts to fix CVE-2023-52812 ] Signed-off-by: Bin Lan bin.lan.cn@windriver.com --- drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c index 3aab1caed2ac..e159f715c1c2 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c @@ -2498,6 +2498,9 @@ int smu_v13_0_update_pcie_parameters(struct smu_context *smu, uint32_t smu_pcie_arg; int ret, i;

+ if (!num_of_levels) + return 0; + if (!amdgpu_device_pcie_dynamic_switching_supported()) { if (pcie_table->pcie_gen[num_of_levels - 1] < pcie_gen_cap) pcie_gen_cap = pcie_table->pcie_gen[num_of_levels - 1];