[dpdk-stable] [PATCH] examples/vhost: fix potential overflow in args process

[Cheng Jiang]

Add args length check to fix potential overflow issue.

Coverity issue: 363741
Fixes: 965b06f0358 ("examples/vhost: enhance getopt_long usage")
Cc: stable at dpdk.org

Signed-off-by: Cheng Jiang <Cheng1.jiang at intel.com>
---
 examples/vhost/main.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 119ba7e01..5df36ad3c 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -669,6 +669,11 @@ us_vhost_parse_args(int argc, char **argv)
 			break;
 
 		case OPT_DMA_TYPE_NUM:
+			if (strlen(optarg) >= MAX_LONG_OPT_SZ) {
+				RTE_LOG(INFO, VHOST_CONFIG, "Wrong DMA type\n");
+				us_vhost_usage(prgname);
+				return -1;
+			}
 			strcpy(dma_type, optarg);
 			break;
 
-- 
2.29.2