gnu/67565: SIGPIPE processing in cvs 1.11.5 may lead to SIGSEGV itself

Eugene Grosbein eugen at grosbein.pp.ru
Fri Jun 4 03:40:20 PDT 2004


>Number:         67565
>Category:       gnu
>Synopsis:       SIGPIPE processing in cvs 1.11.5 may lead to SIGSEGV itself
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jun 04 03:40:18 PDT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Eugene Grosbein
>Release:        FreeBSD 4.9-STABLE i386
>Organization:
Svyaz Service JSC
>Environment:
System: FreeBSD www.svzserv.kemerovo.su 4.9-STABLE FreeBSD 4.9-STABLE #9: Wed Apr 7 14:33:34 KRAST 2004 eu at www.svzserv.kemerovo.su:/home4/obj/home/src/sys/WWW i386
	cvs 1.11.5

>Description:
	We run private CVS repository for local projects,
	developers use pserver method for access (they use WinCVS).
	Often our cvs pserver crash with SIGSEGV.

>How-To-Repeat:
	It seems it occures when cvs receives SIGPIPE.

	Here is GDB backtrace:

Script started on Fri Jun  4 16:54:33 2004
GNU gdb 4.18 (FreeBSD)
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
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Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-unknown-freebsd"...Deprecated bfd_read called at /home/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxread.c line 2627 in elfstab_build_psymtabs
Deprecated bfd_read called at /home/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxread.c line 933 in fill_symbuf

Core was generated by `cvs'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/lib/libgnuregex.so.2...done.
Reading symbols from /usr/lib/libmd.so.2...done.
Reading symbols from /usr/lib/libcrypt.so.2...done.
Reading symbols from /usr/lib/libz.so.2...done.
Reading symbols from /usr/lib/libc.so.4...done.
Reading symbols from /usr/libexec/ld-elf.so.1...done.
#0  0x804f71e in buf_shutdown (buf=0x0)
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/buffer.c:1208
1208	    if (buf->shutdown)
(gdb) bt 
#0  0x804f71e in buf_shutdown (buf=0x0)
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/buffer.c:1208
#1  0x8098fb1 in server_cleanup (sig=0)
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/server.c:4930
#2  0x806454f in error_exit ()
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/error.c:71
#3  0x8064921 in error (status=1, errnum=0, 
    message=0x80c3af9 "received %s signal")
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/error.c:212
#4  0x807771a in main_cleanup (sig=13)
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/main.c:395
#5  0x80a677e in SIG_handle (sig=13)
    at /home/src/gnu/usr.bin/cvs/lib/../../../../contrib/cvs/lib/sighandle.c:158
#6  0xbfbfffac in ?? ()
#7  0x804e5ae in buf_send_output (buf=0x80da040)
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/buffer.c:287
#8  0x804e6e8 in buf_flush (buf=0x80da040, block=1)
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/buffer.c:352
#9  0x80990a5 in server_cleanup (sig=0)
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/server.c:5045
#10 0x80996c9 in server (argc=1, argv=0xbfbffccc)
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/server.c:5272
#11 0x8078519 in main (argc=1, argv=0xbfbffccc)
---Type <return> to continue, or q <return> to quit--- 
    at /home/src/gnu/usr.bin/cvs/cvs/../../../../contrib/cvs/src/main.c:1028
(gdb) quit

Script done on Fri Jun  4 16:54:50 2004

>Fix:

	Unknown.

>Release-Note:
>Audit-Trail:
>Unformatted:


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