wifi: iwlwifi: fw: fix wgds rev 3 exact size

[ Upstream commit 3ee22f0 ]

Check size of WGDS revision 3 is equal to 8 entries size with some header,
but doesn't depend on the number of used entries. Check that used entries
are between min and max but allow more to be present than are used to fix
operation with some BIOSes that have such data.

Fixes: 97f8a3d ("iwlwifi: ACPI: support revision 3 WGDS tables")
Signed-off-by: Anjaneyulu <[email protected]>
Signed-off-by: Miri Korenblit <[email protected]>
Link: https://patch.msgid.link/20240825191257.cc71dfc67ec3.Ic27ee15ac6128b275c210b6de88f2145bd83ca7b@changeid
[edit commit message]
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

drivers/net/wireless/intel/iwlwifi/fw/acpi.c

@@ -724,22 +724,25 @@ int iwl_acpi_get_wgds_table(struct iwl_fw_runtime *fwrt)
 				entry = &wifi_pkg->package.elements[entry_idx];
 				entry_idx++;
 				if (entry->type != ACPI_TYPE_INTEGER ||
-				    entry->integer.value > num_profiles) {
+				    entry->integer.value > num_profiles ||
+				    entry->integer.value <
+					rev_data[idx].min_profiles) {
 					ret = -EINVAL;
 					goto out_free;
 				}
-				num_profiles = entry->integer.value;
 
 				/*
-				 * this also validates >= min_profiles since we
-				 * otherwise wouldn't have gotten the data when
-				 * looking up in ACPI
+				 * Check to see if we received package count
+				 * same as max # of profiles
 				 */
 				if (wifi_pkg->package.count !=
 				    hdr_size + profile_size * num_profiles) {
 					ret = -EINVAL;
 					goto out_free;
 				}
+
+				/* Number of valid profiles */
+				num_profiles = entry->integer.value;
 			}
 			goto read_table;
 		}