From: Colin Ian King colin.king@canonical.com
[ Upstream commit 7ee78aff9de13d5dccba133f4a0de5367194b243 ]
There is an off-by-one bounds check on the index into arrays table->mc_reg_address and table->mc_reg_table_entry[k].mc_data[j] that can lead to reads and writes outside of arrays. Fix the bound checking off-by-one error.
Addresses-Coverity: ("Out-of-bounds read/write") Fixes: cc8dbbb4f62a ("drm/radeon: add dpm support for CI dGPUs (v2)") Signed-off-by: Colin Ian King colin.king@canonical.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/radeon/ci_dpm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c index be43582811dfc..50bad42527b1c 100644 --- a/drivers/gpu/drm/radeon/ci_dpm.c +++ b/drivers/gpu/drm/radeon/ci_dpm.c @@ -4348,7 +4348,7 @@ static int ci_set_mc_special_registers(struct radeon_device *rdev, table->mc_reg_table_entry[k].mc_data[j] |= 0x100; } j++; - if (j > SMU7_DISCRETE_MC_REGISTER_ARRAY_SIZE) + if (j >= SMU7_DISCRETE_MC_REGISTER_ARRAY_SIZE) return -EINVAL;
if (!pi->mem_gddr5) {