[dpdk-dev] [PATCH] devargs: fix devargs truncation when format string is used

[Andrew Rybchenko]

Space for string terminating NUL character should be provided to
snprintf() to avoid the last symbol truncation.

Fixes: a23bc2c4e01b ("devargs: add non-variadic parsing function")

Reported-by: Ivan Malov <ivan.malov at oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
---
 lib/librte_eal/common/eal_common_devargs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c
index a22a2002e..5ec688aab 100644
--- a/lib/librte_eal/common/eal_common_devargs.c
+++ b/lib/librte_eal/common/eal_common_devargs.c
@@ -285,7 +285,7 @@ rte_devargs_parsef(struct rte_devargs *da, const char *format, ...)
 	}
 
 	va_start(ap, format);
-	vsnprintf(dev, len, format, ap);
+	vsnprintf(dev, len + 1, format, ap);
 	va_end(ap);
 
 	return rte_devargs_parse(da, dev);
-- 
2.17.1