http://qa.mandrakesoft.com/show_bug.cgi?id=5622
Product: shadow-utils
Component: program
Summary: [PATCH] useradd coredumps on 9.1-secure
Product: shadow-utils
Version: 4.0.3-5mdk
Platform: Other
OS/Version: All
Status: UNCONFIRMED
Severity: major
Priority: P2
Component: program
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Attempting to use useradd always coredumps if the -G flag isn't given. The
reason is the the variable user_groups is allocated but the entries are never
initialized (unless the -G flag was specified so that get_groups() is called),
so is_on_list() (called from grp_update()) tests an invalid pointer. The patch
is simple:
-------------------------------------------------------------------------
--- shadow-4.0.3/src/useradd.c.orig 2003-09-12 18:30:30.000000000 -0700
+++ shadow-4.0.3/src/useradd.c 2003-09-12 17:51:26.000000000 -0700
@@ -1969,6 +1969,7 @@
sys_ngroups = sysconf (_SC_NGROUPS_MAX);
user_groups = malloc ((1 + sys_ngroups) * sizeof (char *));
+ user_groups[0] = (char *) 0;
Prog = Basename (argv[0]);
setlocale (LC_ALL, "");
----------------------------------------------------------------------------
The original coredumps every single time on a system with kernel
2.4.21-0.25mdksecure, glibc-2.3.1-10mdk, and using libsafe-2.0.13-2mdk.
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