table: fix out of bounds write

Fix out of bounds write. The allocated string size was incorrect.

Coverity issue: 369670
Fixes: 66440b7b22f2 ("table: add wildcard match table type")

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>

diff --git a/lib/librte_table/rte_swx_table_wm.c b/lib/librte_table/rte_swx_table_wm.c
index 9924231..e260be1 100644 (file)
--- a/lib/librte_table/rte_swx_table_wm.c
+++ b/lib/librte_table/rte_swx_table_wm.c
@@ -53,15 +53,14 @@ env_free(void *start, size_t size)
 
 static char *get_unique_name(void)
 {
-       char *name;
-       uint64_t *tsc;
+       uint64_t tsc = rte_get_tsc_cycles();
+       size_t size = sizeof(uint64_t) * 2 + 1;
+       char *name = calloc(1, size);
 
-       name = calloc(7, 1);
        if (!name)
                return NULL;
 
-       tsc = (uint64_t *) name;
-       *tsc = rte_get_tsc_cycles();
+       snprintf(name, size, "%016" PRIx64, tsc);
        return name;
 }