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* [dpdk-dev] [PATCH] eal: copy optarg when parsing mempool ops name
@ 2018-05-04 10:31 Andrew Rybchenko
  2018-05-07  5:42 ` santosh
  0 siblings, 1 reply; 3+ messages in thread
From: Andrew Rybchenko @ 2018-05-04 10:31 UTC (permalink / raw)
  To: dev; +Cc: Ivan Malov, Santosh Shukla, stable

From: Ivan Malov <ivan.malov@oktetlabs.ru>

The code aimed to pick and remember the value of
mempool ops name from EAL command line arguments does not
copy the string and remembers the pointer provided
by getopt_long() directly. The latter could be clobbered
later and result in reading wrong mbuf pool ops name
by rte_mempool library.

Typically, this flaw could be avoided by using strdup()
to remember the string value of the option.

Fixes: a103a97e7191 ("eal: allow user to override default mempool driver")
Cc: Santosh Shukla <santosh.shukla@caviumnetworks.com>
Cc: stable@dpdk.org

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 lib/librte_eal/bsdapp/eal/eal.c   | 3 ++-
 lib/librte_eal/linuxapp/eal/eal.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
index a63f11f31..3ba328ad6 100644
--- a/lib/librte_eal/bsdapp/eal/eal.c
+++ b/lib/librte_eal/bsdapp/eal/eal.c
@@ -380,7 +380,8 @@ eal_parse_args(int argc, char **argv)
 
 		switch (opt) {
 		case OPT_MBUF_POOL_OPS_NAME_NUM:
-			internal_config.user_mbuf_pool_ops_name = optarg;
+			internal_config.user_mbuf_pool_ops_name =
+			    strdup(optarg);
 			break;
 		case 'h':
 			eal_usage(prgname);
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index e2c0bd649..34d94121a 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -593,7 +593,8 @@ eal_parse_args(int argc, char **argv)
 			break;
 
 		case OPT_MBUF_POOL_OPS_NAME_NUM:
-			internal_config.user_mbuf_pool_ops_name = optarg;
+			internal_config.user_mbuf_pool_ops_name =
+			    strdup(optarg);
 			break;
 
 		default:
-- 
2.14.1

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2018-05-13 23:07 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2018-05-04 10:31 [dpdk-dev] [PATCH] eal: copy optarg when parsing mempool ops name Andrew Rybchenko
2018-05-07  5:42 ` santosh
2018-05-13 23:07   ` Thomas Monjalon

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