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iptunnel: sanitize copying tunnel name 

Since p->name is only IFNAMSIZ bytes, do not copy more than IFNAMSIZ - 1
bytes into it so there remains at least a single null byte in the end.

Signed-off-by: Phil Sutter <phil@nwl.cc>
This commit is contained in:
Phil Sutter 2015-11-13 18:09:04 +01:00 committed by Stephen Hemminger
parent c957821b18
commit f53ecee818
1 changed files with 1 additions and 1 deletions
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2
ip/iptunnel.c
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@ -175,7 +175,7 @@ static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
usage();
if (p->name[0])
duparg2("name", *argv);
strncpy(p->name, *argv, IFNAMSIZ);
strncpy(p->name, *argv, IFNAMSIZ - 1);
if (cmd == SIOCCHGTUNNEL && count == 0) {
struct ip_tunnel_parm old_p;
memset(&old_p, 0, sizeof(old_p));