From: Johannes Berg Date: Sun, 28 Jan 2024 06:53:55 +0000 (+0200) Subject: wifi: iwlwifi: acpi: fix WPFC reading X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=296f3e926716ded8dc29e349d2b042b362f96515;p=linux.git wifi: iwlwifi: acpi: fix WPFC reading The code reading the WPFC table needs to take into account the domain type (first element in the package), shouldn't leak the memory if it fails, and has a bad comment. Fix all these issues. Fixes: c4c954547755 ("wifi: iwlwifi: implement WPFC ACPI table loading") Reported-by: Miri Korenblit Signed-off-by: Johannes Berg Reviewed-by: Gregory Greenman Gregory Link: https://msgid.link/20240128084842.2afeb476b62d.I200568dc42a277e21c12be99d5aaa39b009d45da@changeid Signed-off-by: Johannes Berg --- diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c index b96f30d11644e..72a0a9565371f 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c @@ -1293,7 +1293,6 @@ void iwl_acpi_get_phy_filters(struct iwl_fw_runtime *fwrt, if (IS_ERR(data)) return; - /* try to read wtas table revision 1 or revision 0*/ wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, ACPI_WPFC_WIFI_DATA_SIZE, &tbl_rev); @@ -1303,13 +1302,14 @@ void iwl_acpi_get_phy_filters(struct iwl_fw_runtime *fwrt, if (tbl_rev != 0) goto out_free; - BUILD_BUG_ON(ARRAY_SIZE(filters->filter_cfg_chains) != ACPI_WPFC_WIFI_DATA_SIZE); + BUILD_BUG_ON(ARRAY_SIZE(filters->filter_cfg_chains) != + ACPI_WPFC_WIFI_DATA_SIZE - 1); for (i = 0; i < ARRAY_SIZE(filters->filter_cfg_chains); i++) { - if (wifi_pkg->package.elements[i].type != ACPI_TYPE_INTEGER) - return; + if (wifi_pkg->package.elements[i + 1].type != ACPI_TYPE_INTEGER) + goto out_free; tmp.filter_cfg_chains[i] = - cpu_to_le32(wifi_pkg->package.elements[i].integer.value); + cpu_to_le32(wifi_pkg->package.elements[i + 1].integer.value); } IWL_DEBUG_RADIO(fwrt, "Loaded WPFC filter config from ACPI\n"); diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h index e9277f6f35821..39106ccb4b9b6 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h @@ -56,7 +56,7 @@ #define ACPI_EWRD_WIFI_DATA_SIZE_REV2 ((ACPI_SAR_PROFILE_NUM - 1) * \ ACPI_SAR_NUM_CHAINS_REV2 * \ ACPI_SAR_NUM_SUB_BANDS_REV2 + 3) -#define ACPI_WPFC_WIFI_DATA_SIZE 4 /* 4 filter config words */ +#define ACPI_WPFC_WIFI_DATA_SIZE 5 /* domain and 4 filter config words */ /* revision 0 and 1 are identical, except for the semantics in the FW */ #define ACPI_GEO_NUM_BANDS_REV0 2