Patch "net/smc: fix missing byte order conversion in CLC handshake" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    net/smc: fix missing byte order conversion in CLC handshake

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-smc-fix-missing-byte-order-conversion-in-clc-han.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 2538b01379f010ed5d75b6922c06e39e0c7be082
Author: Wen Gu <guwen@xxxxxxxxxxxxxxxxx>
Date:   Thu Dec 7 01:02:37 2023 +0800

    net/smc: fix missing byte order conversion in CLC handshake
    
    [ Upstream commit c5a10397d4571bcfd4bd7ca211ee47bcb6792ec3 ]
    
    The byte order conversions of ISM GID and DMB token are missing in
    process of CLC accept and confirm. So fix it.
    
    Fixes: 3d9725a6a133 ("net/smc: common routine for CLC accept and confirm")
    Signed-off-by: Wen Gu <guwen@xxxxxxxxxxxxxxxxx>
    Reviewed-by: Tony Lu <tonylu@xxxxxxxxxxxxxxxxx>
    Reviewed-by: Alexandra Winter <wintera@xxxxxxxxxxxxx>
    Reviewed-by: Wenjia Zhang <wenjia@xxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/1701882157-87956-1-git-send-email-guwen@xxxxxxxxxxxxxxxxx
    Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 741339ac94833..ef5b5d498ef3e 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -723,7 +723,7 @@ static void smcd_conn_save_peer_info(struct smc_sock *smc,
 	int bufsize = smc_uncompress_bufsize(clc->d0.dmbe_size);
 
 	smc->conn.peer_rmbe_idx = clc->d0.dmbe_idx;
-	smc->conn.peer_token = clc->d0.token;
+	smc->conn.peer_token = ntohll(clc->d0.token);
 	/* msg header takes up space in the buffer */
 	smc->conn.peer_rmbe_size = bufsize - sizeof(struct smcd_cdc_msg);
 	atomic_set(&smc->conn.peer_rmbe_space, smc->conn.peer_rmbe_size);
@@ -1415,7 +1415,7 @@ static int smc_connect_ism(struct smc_sock *smc,
 		if (rc)
 			return rc;
 	}
-	ini->ism_peer_gid[ini->ism_selected] = aclc->d0.gid;
+	ini->ism_peer_gid[ini->ism_selected] = ntohll(aclc->d0.gid);
 
 	/* there is only one lgr role for SMC-D; use server lock */
 	mutex_lock(&smc_server_lgr_pending);
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index 8deb46c28f1d5..72f4d81a3f41f 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -1004,6 +1004,7 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
 {
 	struct smc_connection *conn = &smc->conn;
 	struct smc_clc_first_contact_ext_v2x fce;
+	struct smcd_dev *smcd = conn->lgr->smcd;
 	struct smc_clc_msg_accept_confirm *clc;
 	struct smc_clc_fce_gid_ext gle;
 	struct smc_clc_msg_trail trl;
@@ -1021,17 +1022,15 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
 		memcpy(clc->hdr.eyecatcher, SMCD_EYECATCHER,
 		       sizeof(SMCD_EYECATCHER));
 		clc->hdr.typev1 = SMC_TYPE_D;
-		clc->d0.gid =
-			conn->lgr->smcd->ops->get_local_gid(conn->lgr->smcd);
-		clc->d0.token = conn->rmb_desc->token;
+		clc->d0.gid = htonll(smcd->ops->get_local_gid(smcd));
+		clc->d0.token = htonll(conn->rmb_desc->token);
 		clc->d0.dmbe_size = conn->rmbe_size_comp;
 		clc->d0.dmbe_idx = 0;
 		memcpy(&clc->d0.linkid, conn->lgr->id, SMC_LGR_ID_SIZE);
 		if (version == SMC_V1) {
 			clc->hdr.length = htons(SMCD_CLC_ACCEPT_CONFIRM_LEN);
 		} else {
-			clc_v2->d1.chid =
-				htons(smc_ism_get_chid(conn->lgr->smcd));
+			clc_v2->d1.chid = htons(smc_ism_get_chid(smcd));
 			if (eid && eid[0])
 				memcpy(clc_v2->d1.eid, eid, SMC_MAX_EID_LEN);
 			len = SMCD_CLC_ACCEPT_CONFIRM_LEN_V2;
diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h
index c5c8e7db775a7..08155a96a02a1 100644
--- a/net/smc/smc_clc.h
+++ b/net/smc/smc_clc.h
@@ -204,8 +204,8 @@ struct smcr_clc_msg_accept_confirm {	/* SMCR accept/confirm */
 } __packed;
 
 struct smcd_clc_msg_accept_confirm_common {	/* SMCD accept/confirm */
-	u64 gid;		/* Sender GID */
-	u64 token;		/* DMB token */
+	__be64 gid;		/* Sender GID */
+	__be64 token;		/* DMB token */
 	u8 dmbe_idx;		/* DMBE index */
 #if defined(__BIG_ENDIAN_BITFIELD)
 	u8 dmbe_size : 4,	/* buf size (compressed) */




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