From: Avraham Stern <avraham.stern@xxxxxxxxx> commit 55cf10488d7a9fa1b1b473a5e44a80666932e094 upstream. The SAP data header has some fields that are marked as reserved but are actually in use by CSME. Clear those fields before sending the data to avoid having random values in those fields. Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Avraham Stern <avraham.stern@xxxxxxxxx> Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx> Link: https://lore.kernel.org/r/20220517120045.8dd3423cf683.I02976028eaa6aab395cb2e701fa7127212762eb7@changeid Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/wireless/intel/iwlwifi/mei/main.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/wireless/intel/iwlwifi/mei/main.c +++ b/drivers/net/wireless/intel/iwlwifi/mei/main.c @@ -493,6 +493,7 @@ void iwl_mei_add_data_to_ring(struct sk_ if (cb_tx) { struct iwl_sap_cb_data *cb_hdr = skb_push(skb, sizeof(*cb_hdr)); + memset(cb_hdr, 0, sizeof(*cb_hdr)); cb_hdr->hdr.type = cpu_to_le16(SAP_MSG_CB_DATA_PACKET); cb_hdr->hdr.len = cpu_to_le16(skb->len - sizeof(cb_hdr->hdr)); cb_hdr->hdr.seq_num = cpu_to_le32(atomic_inc_return(&mei->sap_seq_no));
