[Samba] Crash in 4.12.10 in

[Peter Eriksson]

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 :-(

I created a bug in bugzilla for it (14571).

The calls that sids_to_unixids() calls are:

idmap_hash_initialize
wcache_tdc_fetch_list
make_tdc_key
tdb_fetch
unpack_tdc_domains
talloc_zero_array
domain_has_idmap_config
hash_domain_sid
dom_sid_str_buf
talloc
sid_copy
sid_copy
sid_split_rid
hash_domain_sid
hash_rid
combine_hashes

But I don’t see any obvious candidate…

- Peter