[15929] in Kerberos-V5-bugs
[krbdev.mit.edu #8661] ksu segfaults when argc == 0
daemon@ATHENA.MIT.EDU (Erik Sjölund via RT)
Sun Apr 1 13:11:36 2018
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From: "Erik Sjölund via RT" <rt-comment@KRBDEV-PROD-APP-1.mit.edu>
In-Reply-To: <rt-8661@krbdev.mit.edu>
Message-ID: <rt-8661-48362.13.3113482740189@krbdev.mit.edu>
To: "'AdminCc of krbdev.mit.edu Ticket #8661'":;
Date: Sun, 1 Apr 2018 13:11:21 -0400 (EDT)
Reply-To: rt-comment@KRBDEV-PROD-APP-1.mit.edu
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Programs are generally started with argc >= 1,
but it is possible to start a program with an
empty argv (i.e. argc == 0).
Current behaviour:
ksu segfaults when started with argc == 0.
Expected behaviour:
I would expect ksu to just exit with an error
instead.
Here is a demonstration of the segmentation fault:
user@laptop:/tmp$ cat /etc/issue
Ubuntu 17.10 \n \l
user@laptop:/tmp$ cat main.cc
#include <unistd.h>
int main() {
char* arr[] = {nullptr};
execv("/usr/bin/ksu", arr);
}
user@laptop:/tmp$ g++ -std=c++11 -o /tmp/start main.cc
user@laptop:/tmp$ /tmp/start
Segmentation fault (core dumped)
user@laptop:/tmp$
Best regards,
Erik Sjölund
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