| From: | "Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx> |
| Date: | Mon, 11 Jul 2005 23:10:36 +0200 |
Lately walt <wa1ter@xxxxxxxxxxxxx> said: > Simon 'corecode' Schubert wrote: > > Lately walt <wa1ter@xxxxxxxxxxxxx> said: > > >>smbd: stack overflow in function open_sockets_smbd > >>kernel: pid 907 (smbd), uid 0: exited on signal 6 > > >>That is what I get when any client (like smbtree) tries to > >>connect to my DFly machine running smbd. > > >>Has anyone here been able to get pkgsrc/samba running on DFly? > > > > uhm yea, but i forgot how... :) package should be chlamydia/mirrors > > Yes, your package works, thanks. > > I'm trying to become a debugger, so I'm fiddling with gdb to see > what trouble I can cause ;o) > > After I cause one of those stack overflow errors I can attach gdb > to the running smbd and a bt produces this: > > #0 0x282e6cb4 in select () from /usr/lib/libc.so.5 > #1 0x081a17b2 in sys_select () > #2 0x081ec1f7 in open_sockets_smbd (is_daemon=0, interactive=0, > smb_ports=0x14 <Error reading address 0x14: Bad address>) at > smbd/server.c:343 > #3 0x00000000 in ?? () > > Could a programming genius use this info to figure out what's > going on? okay, next thing is to run smbd in gdb (foreground mode) and then put a breakpoint on open_sockets_smbd. Obviously the return address gets smashed as well, so while stepping through this function, have a look at the stacktrace. As soon as it's broken, you found the bug. Easy, no? :) cheers simon -- Serve - BSD +++ RENT this banner advert +++ ASCII Ribbon /"\ Work - Mac +++ space for low $$$ NOW!1 +++ Campaign \ / Party Enjoy Relax | http://dragonflybsd.org Against HTML \ Dude 2c 2 the max ! http://golden-apple.biz Mail + News / \
Attachment:
pgp00003.pgp
Description: PGP signature