[PATCH AUTOSEL 4.14 27/28] scsi: libfc: Fix array index out of bound exception

Sasha Levin
2021-07-14T20:02:36Z

From: Javed Hasan <jhasan@marvell.com>

[ Upstream commit b27c4577557045f1ab3cdfeabfc7f3cd24aca1fe ]

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

Link: https://lore.kernel.org/r/20210615165939.24327-1-jhasan@marvell.com
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/libfc/fc_rport.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 669cf3553a77..ef2fa6b10a9c 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1174,6 +1174,7 @@ 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)
@@ -1194,11 +1195,13 @@ 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
--
2.30.2