[Samba] Crash in 4.12.10 in

[Andrew Walker]

On Tue, Nov 10, 2020 at 5:01 PM Peter Eriksson via samba <
samba at lists.samba.org> wrote:

> I just got an INTERNAL ERROR: Signal 11 in smbd (4.12.10) in something
> that sids_to_unixids() in source3/winbindd/idmap_hash/idmap_has.c calls and
> 3 levels down - unfortunately the stack trace doesn’t say what it is -
> probably optimised into inline code or something.
>
> Recently upgraded from Samba 4.12.5 to 4.12.10 (self-compiled). FreeBSD
> 12.2
>
> It happened right after 10 hours since that smbd processes started so the
> 10 hours Kerberos ticket lifetime is probably involved somehow…
>
> Nov 10 21:39:11 runur01 smbd_audit[23768]:    #3 sig_fault + 0x6c
> [ip=0x80129a7a9] [sp=0x7fffffffcbb0]
> Nov 10 21:39:11 runur01 smbd_audit[23768]:    #4 <unknown symbol>
> [ip=0x801517b70] [sp=0x7fffffffcbc0]
> Nov 10 21:39:12 runur01 smbd_audit[23768]:    #5 <unknown symbol>
> [ip=0x80151713f] [sp=0x7fffffffcf80]
> Nov 10 21:39:12 runur01 smbd_audit[23768]:    #6 <unknown symbol>
> [ip=0x7ffffffff003] [sp=0x7fffffffcff0]
> Nov 10 21:39:12 runur01 smbd_audit[23768]:    #7 sids_to_unixids + 0x25d
>
> Unfortunately no core dump :-(
>
You may need to run the command "sysctl kern.sugid_coredump=1" and also set
kern.corefile to an appropriate path (for example /tmp/%N_%P.core -- this
ensures program name and pid are in corefile name).  If possible compile
without optimizations and with debugging symbols (this will improve
visibility of error).