[iproute PATCH v3 1/7] ipntable: Avoid memory allocation for filter.name

[Phil Sutter]

The original issue was that filter.name might end up unterminated if
user provided string was too long. But in fact it is not necessary to
copy the commandline parameter at all: just make filter.name point to it
instead.

Signed-off-by: Phil Sutter <p...@nwl.cc>
---
 ip/ipntable.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/ip/ipntable.c b/ip/ipntable.c
index 879626ee4f491..e0bd9b6ebd155 100644
--- a/ip/ipntable.c
+++ b/ip/ipntable.c
@@ -37,7 +37,7 @@ static struct
        int family;
        int index;
 #define NONE_DEV       (-1)
-       char name[1024];
+       const char *name;
 } filter;
 
 static void usage(void) __attribute__((noreturn));
@@ -369,7 +369,7 @@ static int print_ntable(const struct sockaddr_nl *who, 
struct nlmsghdr *n, void
        if (tb[NDTA_NAME]) {
                const char *name = rta_getattr_str(tb[NDTA_NAME]);
 
-               if (strlen(filter.name) > 0 && strcmp(filter.name, name))
+               if (filter.name && strcmp(filter.name, name))
                        return 0;
        }
        if (tb[NDTA_PARMS]) {
@@ -633,7 +633,7 @@ static int ipntable_show(int argc, char **argv)
                } else if (strcmp(*argv, "name") == 0) {
                        NEXT_ARG();
 
-                       strncpy(filter.name, *argv, sizeof(filter.name));
+                       filter.name = *argv;
                } else
                        invarg("unknown", *argv);
 
-- 
2.13.1