[PATCH 5.15 16/73] wifi: iwlwifi: mvm: Fix response handling in iwl_mvm_send_recovery_cmd()

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Gabay <daniel.gabay@intel.com>

[ Upstream commit 07a6e3b78a65f4b2796a8d0d4adb1a15a81edead ]

1. The size of the response packet is not validated.
2. The response buffer is not freed.

Resolve these issues by switching to iwl_mvm_send_cmd_status(),
which handles both size validation and frees the buffer.

Fixes: f130bb75d881 ("iwlwifi: add FW recovery flow")
Signed-off-by: Daniel Gabay <daniel.gabay@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20241010140328.76c73185951e.Id3b6ca82ced2081f5ee4f33c997491d0ebda83f7@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
index 62f16966899eb..3009fff9086f5 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -1282,8 +1282,8 @@ static void iwl_mvm_disconnect_iterator(void *data, u8 *mac,
 void iwl_mvm_send_recovery_cmd(struct iwl_mvm *mvm, u32 flags)
 {
 	u32 error_log_size = mvm->fw->ucode_capa.error_log_size;
+	u32 status = 0;
 	int ret;
-	u32 resp;
 
 	struct iwl_fw_error_recovery_cmd recovery_cmd = {
 		.flags = cpu_to_le32(flags),
@@ -1291,7 +1291,6 @@ void iwl_mvm_send_recovery_cmd(struct iwl_mvm *mvm, u32 flags)
 	};
 	struct iwl_host_cmd host_cmd = {
 		.id = WIDE_ID(SYSTEM_GROUP, FW_ERROR_RECOVERY_CMD),
-		.flags = CMD_WANT_SKB,
 		.data = {&recovery_cmd, },
 		.len = {sizeof(recovery_cmd), },
 	};
@@ -1311,7 +1310,7 @@ void iwl_mvm_send_recovery_cmd(struct iwl_mvm *mvm, u32 flags)
 		recovery_cmd.buf_size = cpu_to_le32(error_log_size);
 	}
 
-	ret = iwl_mvm_send_cmd(mvm, &host_cmd);
+	ret = iwl_mvm_send_cmd_status(mvm, &host_cmd, &status);
 	kfree(mvm->error_recovery_buf);
 	mvm->error_recovery_buf = NULL;
 
@@ -1322,11 +1321,10 @@ void iwl_mvm_send_recovery_cmd(struct iwl_mvm *mvm, u32 flags)
 
 	/* skb respond is only relevant in ERROR_RECOVERY_UPDATE_DB */
 	if (flags & ERROR_RECOVERY_UPDATE_DB) {
-		resp = le32_to_cpu(*(__le32 *)host_cmd.resp_pkt->data);
-		if (resp) {
+		if (status) {
 			IWL_ERR(mvm,
 				"Failed to send recovery cmd blob was invalid %d\n",
-				resp);
+				status);
 
 			ieee80211_iterate_interfaces(mvm->hw, 0,
 						     iwl_mvm_disconnect_iterator,
-- 
2.43.0