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Re: NULL Pointer Dereference in unsetcmd() at inetutils/telnet/commands.
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From: |
Simon Josefsson |
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Subject: |
Re: NULL Pointer Dereference in unsetcmd() at inetutils/telnet/commands.c:1227 |
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Date: |
Fri, 08 Jul 2022 21:03:08 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) |
Erik Auerswald <auerswal@unix-ag.uni-kl.de> writes:
> It seems to me as if this Netkit project no longer exists. Since I do
> not know the upstream project, I have not report any bugs, and have not
> send any patches.
Yeah, the NetKit telnet project is in a sad state.
> I do not have a BSD system to test, but anyone who does can easily try
> out the above.
I think we should reach out to some BSD contacts...
NetBSD 9.2 (GENERIC) #0: Wed May 12 13:15:55 UTC 2021
gcc300$ telnet
telnet> set ' ' crash
[1] Segmentation fault (core dumped) telnet
gcc300$ telnet
telnet> unset ' '
[1] Segmentation fault (core dumped) telnet
gcc300$ telnet
telnet> help z ! ? z ! ? z ! ? z ! ? z ! ? z ! ? z !
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
telnet> help help
[1] Segmentation fault (core dumped) telnet
gcc300$
OpenBSD 7.1 (GENERIC.MP) #3: Sun May 15 10:27:01 MDT 2022
gcc220$ telnet
telnet> set ' ' crash
Segmentation fault (core dumped)
gcc220$ telnet
telnet> unset ' '
Segmentation fault (core dumped)
gcc220$ telnet
telnet> help z ! ? z ! ? z ! ? z ! ? z ! ? z ! ? z !
too many arguments
telnet> gcc220$ telnet
telnet> help help
(null)
telnet>
FreeBSD 13.0-RELEASE-p3 (GENERIC) #0: Tue Jun 29 19:46:20 UTC 2021
$ telnet
telnet> set ' ' crash
Segmentation fault (core dumped)
$ telnet
telnet> unset ' '
Segmentation fault (core dumped)
$ telnet
telnet> help z ! ? z ! ? z ! ? z ! ? z ! ? z ! ? z !
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
print help information
suspend telnet
invoke a subshell
telnet> $ telnet
telnet> help help
Segmentation fault (core dumped)
$
/Simon
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