linux-kernel - [PATCH 5.18 722/879] iwlwifi: mei: clear the sap data header before sending

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220607165023.811326528@linuxfoundation.org>
Date:   Tue,  7 Jun 2022 19:04:00 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Avraham Stern <avraham.stern@...el.com>,
        Gregory Greenman <gregory.greenman@...el.com>,
        Johannes Berg <johannes.berg@...el.com>
Subject: [PATCH 5.18 722/879] iwlwifi: mei: clear the sap data header before sending

From: Avraham Stern <avraham.stern@...el.com>

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@...r.kernel.org
Signed-off-by: Avraham Stern <avraham.stern@...el.com>
Signed-off-by: Gregory Greenman <gregory.greenman@...el.com>
Link: https://lore.kernel.org/r/20220517120045.8dd3423cf683.I02976028eaa6aab395cb2e701fa7127212762eb7@changeid
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 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));