[Pkg-shadow-devel] Bug#113508: marked as done ([TO CLOSE 20050405] login: SEGV at login.c:585 when using rlogin)

Tue, 12 Apr 2005 13:33:26 -0700

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and subject line Closing old unreproducible bugs
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>From branden@progeny.com Tue Sep 25 15:05:39 2001
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From: Branden Robinson <branden@progeny.com>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: login: SEGV at login.c:585 when using rlogin
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Package: login
Version: 20000902-7
Severity: normal

login is running on an ia64 box.  The bug happens regardless of the
architecture connecting host (at least, i386 and ia64 behave the same way).

GNU gdb 5.0.90-cvs (MI_OUT)
Copyright 2001 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "ia64-unknown-linux"...
Core was generated by `login -p -h minerva.progeny.com -f branden'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libcrypt.so.1...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /lib/libpam.so.0...done.
Loaded symbols for /lib/libpam.so.0
Reading symbols from /lib/libpam_misc.so.0...done.
Loaded symbols for /lib/libpam_misc.so.0
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/libc.so.6.1...done.
Loaded symbols for /lib/libc.so.6.1
Reading symbols from /lib/ld-linux-ia64.so.2...done.
Loaded symbols for /lib/ld-linux-ia64.so.2
#0  0x20000000001dec51 in memchr () from /lib/libc.so.6.1
(gdb) bt
#0  0x20000000001dec51 in memchr () from /lib/libc.so.6.1
#1  0x20000000001dc290 in strnlen () from /lib/libc.so.6.1
#2  0x20000000001dc550 in strncpy () from /lib/libc.so.6.1
#3  0x4000000000004f60 in main (argc=6, argv=0x80000fffffffbe88) at login.c:585

Interestingly, the bug goes away if /bin/login is replaced with a shell
wrapper:

#!/bin/sh

exec /bin/login "$@"

Running login with the exact arguments shown on the local machine does not
cause a segfault.

Telnetting into the machine does not cause a segfault.

-- System Information
Debian Release: testing/unstable
Architecture: ia64
Kernel: Linux butthead 2.4.9-itanium-smp #1 SMP Mon Sep 17 20:48:35 MDT 2001 ia64
Locale: LANG=C, LC_CTYPE=C

Versions of packages login depends on:
ii  libc6.1                       2.2.4-1    GNU C Library: Shared libraries an
ii  libpam-modules                0.72-32    Pluggable Authentication Modules f
ii  libpam0g                      0.72-32    Pluggable Authentication Modules l

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From: Christian Perrier <bubulle@debian.org>
To: 113508-done@bugs.debian.org, 122186-done@bugs.debian.org,
	143286-done@bugs.debian.org
Subject: Closing old unreproducible bugs
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As announced one week ago.

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