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When handling SIOCSIFNAME ensure that the new interface name is NUL

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terminated.  Reject the rename attempt if the name is too long.

MFC after:	1 week
This commit is contained in:
truckman 2016-05-15 21:37:36 +00:00
parent fc8a4ae06d
commit 4d98e41134
1 changed files with 5 additions and 0 deletions
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5
sys/net/if.c
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@ -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);