On Fri, 2004-09-17 at 20:41, Mike Williams wrote:

--- Balazs Scheidler <bazsi@balabit.hu> wrote:

...

I find your backtrace strange, it seems to indicate, that:

1) you seem to have an unknown priority code in your configuration 2) while printing this fact it segfaults

could you enter the following commands to gdb, once you loaded the core file:

(gdb) frame 3 (gdb) p yyvsp[0].cptr

And, please enable debug information for libol as well (e.g. pass the -g argument in CFLAGS to the libol configure script as well)

root@loghost# gdb -c syslog-ng.core /usr/local/sbin/syslog-ng 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 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 "i386-unknown-freebsd"...Deprecated bfd_read called at /usr/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxread.c line 2627 in elfstab_build_psymtabs Deprecated bfd_read called at /usr/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxread.c line 933 in fill_symbuf

Core was generated by `syslog-ng'. Program terminated with signal 11, Segmentation fault. Reading symbols from /usr/lib/libc.so.4...done. Reading symbols from /usr/libexec/ld-elf.so.1...done. #0 0x80580b7 in c_vformat_length (f=0x805fc46 "S\n", args=0x805cb40 "p:dvhyVC:u:g:") at format.c:161 161 length += s ? s->length : 6; (gdb) bt #0 0x80580b7 in c_vformat_length (f=0x805fc46 "S\n", args=0x805cb40 "p:dvhyVC:u:g:") at format.c:161 #1 0x805af1d in msg_vformat (level=3, f=0x805fc20 "Changing permissions on special file %S\n", args=0xbfbff82c "@q\006\b\004") at werror.c:132 #2 0x805afdb in werror (format=0x805fc20 "Changing permissions on special file %S\n") at werror.c:152 #3 0x8052038 in do_open_file (name=0x8067140, flags=32772, uid=-1, gid=-1, mode=-1, dir_uid=-1, dir_gid=-1, dir_mode=-1, create_dirs=0, fd=0xbfbff8f8) at affile.c:101 #4 0x8052278 in do_init_affile_source (c=0x8068100, cfg=0x8069000, persistent=0x0) at affile.c:159 #5 0x804b2eb in do_init_group (c=0x8074100, cfg=0x8069000, persistent=0x0) at sources.c:303 #6 0x804d84f in do_init_config (self=0x8069000, p=0x0) at cfgfile.c:232 #7 0x804a6db in main (argc=1, argv=0xbfbffae8) at main.c:491 (gdb) frame 3 #3 0x8052038 in do_open_file (name=0x8067140, flags=32772, uid=-1, gid=-1, mode=-1, dir_uid=-1, dir_gid=-1, dir_mode=-1, create_dirs=0, fd=0xbfbff8f8) at affile.c:101 101 werror("Changing permissions on special file %S\n", name); (gdb) p yyvsp[0].cptr No symbol "yyvsp" in current context. (gdb) quit

It appears I may have done something wrong. Can you help?

Something is completely strange, do_open_file still has name=0x8067140 as argument, which is passed to werror() without _any_ changes. werror passes this value to msg_vformat(), and it still seems to be ok, '@' == 0x40, 'q' == 0x71, and the other two bytes matches as well. in msg_vformat the argument list is copied using va_copy and the copied value is passed to c_vformat_length. Looking at the backtrace you sent, that value is completely bogus. Either the va_copy implementation on FreeBSD is broken, or I'm doing something wrong with that macro in syslog-ng. I read the man page for va_* macros on Linux, and my use seem to be conforming to the spec. Can you show your stdarg.h file? It is either in /usr/lib/gcc-lib/<arch>/<gccversion>/include/stdarg.h or in /usr/include/stdarg.h. It might also be useful to check which file your compiler uses, if you are running gcc, please specify the -E option to gcc while compiling werror.c and please post the resulting output. (the postprocessed file) -- Bazsi