scsi: libfc: Fix array index out of bound exception

stable inclusion
from stable-5.10.53
commit a4a54c54af2516caa9c145015844543cfc84316a
bugzilla: 175574 https://gitee.com/openeuler/kernel/issues/I4DTUX

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=a4a54c54af2516caa9c145015844543cfc84316a

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

[ Upstream commit b27c4577 ]

Fix array index out of bound exception in fc_rport_prli_resp().

Link: https://lore.kernel.org/r/20210615165939.24327-1-jhasan@marvell.comSigned-off-by: NJaved Hasan <jhasan@marvell.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/scsi/libfc/fc_rport.c

@@ -1162,6 +1162,7 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
 		resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK);
 		FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x spp_type 0x%x\n",
 			     pp->spp.spp_flags, pp->spp.spp_type);
+
 		rdata->spp_type = pp->spp.spp_type;
 		if (resp_code != FC_SPP_RESP_ACK) {
 			if (resp_code == FC_SPP_RESP_CONF)
@@ -1184,11 +1185,13 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
 		/*
 		 * Call prli provider if we should act as a target
 		 */
-		prov = fc_passive_prov[rdata->spp_type];
-		if (prov) {
-			memset(&temp_spp, 0, sizeof(temp_spp));
-			prov->prli(rdata, pp->prli.prli_spp_len,
-				   &pp->spp, &temp_spp);
+		if (rdata->spp_type < FC_FC4_PROV_SIZE) {
+			prov = fc_passive_prov[rdata->spp_type];
+			if (prov) {
+				memset(&temp_spp, 0, sizeof(temp_spp));
+				prov->prli(rdata, pp->prli.prli_spp_len,
+					   &pp->spp, &temp_spp);
+			}
 		}
 		/*
 		 * Check if the image pair could be established