misc/161667: tcpdump as nonroot user with invalid arg results in Segfault

[Paul Procacci]

>Number:         161667
>Category:       misc
>Synopsis:       tcpdump as nonroot user with invalid arg results in Segfault
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Oct 14 20:20:02 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Paul Procacci
>Release:        8.1-RELEASE and 7.4-RELEASE
>Organization:
Datapipe
>Environment:
FreeBSD nat.myhome 8.1-RELEASE-p2 FreeBSD 8.1-RELEASE-p2 #3: Wed Mar  9 22:21:01 CST 2011     root at nat.myhome:/usr/obj/usr/src/sys/FIREWALL  i386


prod-web02# uname -a
FreeBSD prod-web02.smq.datapipe.com 7.4-RELEASE FreeBSD 7.4-RELEASE #0: Thu Apr 14 18:20:44 EDT 2011     root at prod-web02.smq.datapipe.com:/usr/obj/usr/src/sys/DL_380_G5  amd64

>Description:
tcpdump as nonroot user with invalid arg results in Segfault

(Root User):
nat# tcpdump -ni 127.0.0.1 src host 127.0.0.1
tcpdump: Invalid adapter index

(NonRoot User):
%tcpdump -ni 127.0.0.1 src host 127.0.0.1
Segmentation fault (core dumped)

Understandably the argument to -i is not correct, but tcpdump should handle this gracefully.
>How-To-Repeat:
Run as a nonroot user.

tcpdump -ni 127.0.0.1 src host 127.0.0.1
>Fix:
Unknown

>Release-Note:
>Audit-Trail:
>Unformatted: