[dpdk-stable] [PATCH v2] app/test: fix sprintf with strlcat
Pallantla Poornima
pallantlax.poornima at intel.com
Wed Mar 13 12:07:23 CET 2019
sprintf function is not secure as it doesn't check the length of string.
More secure function strlcat is used.
Fixes: 727909c592 ("app/test: introduce dynamic commands list")
Cc: stable at dpdk.org
Signed-off-by: Pallantla Poornima <pallantlax.poornima at intel.com>
---
v2: Used strlcat to avoid buffer overflow.
---
app/test/commands.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/app/test/commands.c b/app/test/commands.c
index 94fbc310e..8d5a03a95 100644
--- a/app/test/commands.c
+++ b/app/test/commands.c
@@ -44,6 +44,7 @@
#include <cmdline_parse_num.h>
#include <cmdline_parse_string.h>
#include <cmdline.h>
+#include <rte_string_fns.h>
#include "test.h"
@@ -365,23 +366,22 @@ cmdline_parse_ctx_t main_ctx[] = {
int commands_init(void)
{
struct test_command *t;
- char *commands, *ptr;
+ char *commands;
int commands_len = 0;
TAILQ_FOREACH(t, &commands_list, next) {
commands_len += strlen(t->command) + 1;
}
- commands = malloc(commands_len + 1);
+ commands = (char *)calloc(commands_len, sizeof(char));
if (!commands)
return -1;
- ptr = commands;
TAILQ_FOREACH(t, &commands_list, next) {
- ptr += sprintf(ptr, "%s#", t->command);
+ strlcat(commands, t->command, commands_len);
+ if (TAILQ_NEXT(t, next) != NULL)
+ strlcat(commands, "#", commands_len);
}
- ptr--;
- ptr[0] = '\0';
cmd_autotest_autotest.string_data.str = commands;
return 0;
--
2.17.2
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