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| author | truckman <truckman@FreeBSD.org> | 2016-05-15 21:37:36 +0000 |
|---|---|---|
| committer | truckman <truckman@FreeBSD.org> | 2016-05-15 21:37:36 +0000 |
| commit | 4d98e411343d176a82e06154becec55a04fa07ca (patch) | |
| tree | c67e37092d8f1345642bdfbbc7c65b225e00edee | |
| parent | fc8a4ae06d7bd393017f0611999439cb0a5e0c85 (diff) | |
| download | FreeBSD-src-4d98e411343d176a82e06154becec55a04fa07ca.zip FreeBSD-src-4d98e411343d176a82e06154becec55a04fa07ca.tar.gz | |
When handling SIOCSIFNAME ensure that the new interface name is NUL
terminated. Reject the rename attempt if the name is too long.
MFC after: 1 week
| -rw-r--r-- | sys/net/if.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/net/if.c b/sys/net/if.c index e816442..800cb70 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -2375,6 +2375,11 @@ ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) return (error); if (new_name[0] == '\0') return (EINVAL); + if (new_name[IFNAMSIZ-1] != '\0') { + new_name[IFNAMSIZ-1] = '\0'; + if (strlen(new_name) == IFNAMSIZ-1) + return (EINVAL); + } if (ifunit(new_name) != NULL) return (EEXIST); |
