From: Cheng Jiang <cheng1.jiang@intel.com>
Date: Fri, 6 Nov 2020 03:24:01 +0000 (+0000)
Subject: examples/vhost: check argument length
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=2b7126f5fce80014853a086e12b83b78b6bca6fe;p=dpdk.git

examples/vhost: check argument length

Add args length check before copying to fix the coverity issue.

Coverity issue: 363741
Fixes: 3a04ecb21420 ("examples/vhost: add async vhost args parsing")

Signed-off-by: Cheng Jiang <cheng1.jiang@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 59a1aff07c..ec88874d16 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -634,6 +634,12 @@ us_vhost_parse_args(int argc, char **argv)
 
 			if (!strncmp(long_option[option_index].name,
 						"dma-type", MAX_LONG_OPT_SZ)) {
+				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);
 			}