Commit 7ee78aff authored by Colin Ian King's avatar Colin Ian King Committed by Alex Deucher

drm/radeon: fix array out-of-bounds read and write issues

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: cc8dbbb4 ("drm/radeon: add dpm support for CI dGPUs (v2)")
Signed-off-by: default avatarColin Ian King <colin.king@canonical.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 57f01856
...@@ -4351,7 +4351,7 @@ static int ci_set_mc_special_registers(struct radeon_device *rdev, ...@@ -4351,7 +4351,7 @@ static int ci_set_mc_special_registers(struct radeon_device *rdev,
table->mc_reg_table_entry[k].mc_data[j] |= 0x100; table->mc_reg_table_entry[k].mc_data[j] |= 0x100;
} }
j++; j++;
if (j > SMU7_DISCRETE_MC_REGISTER_ARRAY_SIZE) if (j >= SMU7_DISCRETE_MC_REGISTER_ARRAY_SIZE)
return -EINVAL; return -EINVAL;
if (!pi->mem_gddr5) { if (!pi->mem_gddr5) {
......
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