[Bug libc/4067] possible problem in sigaction resulting into segfault

["nico-linux-glibc at schottelius dot org" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From nico-linux-glibc at schottelius dot org  2007-02-17 16:38 -------
same happens on glibc-2.4-7mdv2007.0:

[...]
testC
=> cinit started.
test2 - es scheint zu gehen
[SERVICE] /etc/cinit/svc/init: [ FAILED] Service failed!
Finished CHILD catcher
Segmentation fault

If I init the sa.flags it does not segfault:

[telmich@jonas src]$ diff -u core/set_signals.c.segfault core/set_signals.c    
     
--- core/set_signals.c.segfault	2007-02-17 16:34:39.000000000 +0100
+++ core/set_signals.c	2007-02-17 16:34:46.000000000 +0100
@@ -18,17 +18,17 @@
 
    if(action == ACT_SERV) {
       sa.sa_handler  = sig_child;
-//      sa.sa_flags    = SA_NOCLDSTOP; 
+      sa.sa_flags    = SA_NOCLDSTOP; 
    } else {
       sa.sa_handler=SIG_DFL;
-//      sa.sa_flags    = 0;
+      sa.sa_flags    = 0;
    }
-//   sigemptyset(&sa.sa_mask);
+   sigemptyset(&sa.sa_mask);
 
    sigaction(SIGCHLD,&sa,NULL);     /* what todo when a child exited    */
 
    /* reset flags */
-//   sa.sa_flags    = 0;
+   sa.sa_flags    = 0;
    if(action == ACT_SERV) {
       sa.sa_handler=do_reboot;
    }


The version:

[telmich@jonas src]$ /lib/libc.so.6 
GNU C Library development release version 2.4, by Roland McGrath et al.
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.1.1 20060724 (prerelease) (4.1.1-3mdk).
Compiled on a Linux 2.6.17 system on 2007-01-18.
Available extensions:
	crypt add-on version 2.1 by Michael Glad and others
	GNU libio by Per Bothner
	NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk
	Native POSIX Threads Library by Ulrich Drepper et al
	BIND-8.2.3-T5B
Thread-local storage support included.
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|WORKSFORME                  |
            Version|2.3.6                       |2.4


http://sourceware.org/bugzilla/show_bug.cgi?id=4067

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