Re: PANIC (pid 48928): Signal 11: Segmentation fault in 4.23.4

On Thu, 26 Mar 2026 06:08:40 +0700
Budi Janto via samba <[email protected]> wrote:

> Hi,
> 
> I need information about this issue:
> 
> Mar 22 13:00:00 SERVER newsyslog[5632]: logfile turned over due to
> size>200K Mar 25 08:42:07 SERVER smbd[48928]: [2026/03/25
> size>08:42:07.450436,  0] 
> ../../lib/util/fault.c:178(smb_panic_log)
> Mar 25 08:42:07 SERVER smbd[48928]: 
> ===============================================================
> Mar 25 08:42:07 SERVER smbd[48928]: [2026/03/25 08:42:07.450560,  0] 
> ../../lib/util/fault.c:185(smb_panic_log)
> Mar 25 08:42:07 SERVER smbd[48928]:   INTERNAL ERROR: Signal 11: 
> Segmentation fault in smbd () (client [192.168.0.208]) pid 48928
> (4.23.4) Mar 25 08:42:07 SERVER smbd[48928]: [2026/03/25
> 08:42:07.450596,  0] ../../lib/util/fault.c:190(smb_panic_log)
> Mar 25 08:42:07 SERVER smbd[48928]:   If you are running a recent
> Samba version, and if you think this problem is not yet fixed in the
> latest versions, please consider reporting this bug, see 
> https://wiki.samba.org/index.php/Bug_Reporting
> Mar 25 08:42:07 SERVER smbd[48928]: [2026/03/25 08:42:07.450604,  0] 
> ../../lib/util/fault.c:191(smb_panic_log)
> Mar 25 08:42:07 SERVER smbd[48928]: 
> ===============================================================
> Mar 25 08:42:07 SERVER smbd[48928]: [2026/03/25 08:42:07.450609,  0] 
> ../../lib/util/fault.c:193(smb_panic_log)
> Mar 25 08:42:07 SERVER smbd[48928]:   PANIC (pid 48928): Signal 11: 
> Segmentation fault in 4.23.4
> Mar 25 08:43:34 SERVER kernel: pid 48963 (smbd), jid 0, uid 65534: 
> exited on signal 11 (no core dump - sugid process denied by 
> kern.sugid_coredump)
> Mar 25 16:23:31 SERVER kernel: pid 53213 (smbd), jid 0, uid 65534: 
> exited on signal 11 (no core dump - sugid process denied by 
> kern.sugid_coredump)
> Mar 25 21:05:42 SERVER kernel: pid 56347 (smbd), jid 0, uid 65534: 
> exited on signal 11 (no core dump - sugid process denied by 
> kern.sugid_coredump)
> 
> # freebsd-version -kru
> 15.0-RELEASE-p4
> 15.0-RELEASE-p4
> 15.0-RELEASE-p4
> 
> # pkg info samba\*
> samba423-4.23.4
> 
> # testparm
> Load smb config files from /usr/local/etc/smb4.conf
> Loaded services file OK.
> Weak crypto is allowed by GnuTLS (e.g. NTLM as a compatibility
> fallback)
> 
> Server role: ROLE_STANDALONE
> 
> Press enter to see a dump of your service definitions
> 
> # Global parameters
> [global]
> 	aio max threads = 200
> 	bind interfaces only = Yes
> 	disable spoolss = Yes
> 	dns proxy = No
> 	interfaces = 127.0.0.1 192.168.0.100 192.168.99.100
> 	load printers = No
> 	log file = /var/log/samba4/log.smbd
> 	map to guest = Bad User
> 	max log size = 500
> 	max open files = 16384
> 	os level = 255
> 	preferred master = Yes
> 	printcap name = /dev/null
> 	security = USER
> 	server role = standalone server
> 	server string = SERVER %v
> 	show add printer wizard = No
> 	socket options = IPTOS_LOWDELAY TCP_NODELAY
> 	usershare allow guests = Yes
> 	workgroup = OFFICE
> 	idmap config * : range = 3000-7999
> 	idmap config * : backend = tdb

First I would remove these two lines:
	os level = 255
	preferred master = Yes

They are used in network browsing and your Samba isn't using network
browsing.

You should also remove these two lines:

 	idmap config * : range = 3000-7999
	idmap config * : backend = tdb

They are not used on a standalone server.

> 
> 
> [data]
> 	ea support = No
> 	force user = nobody
> 	guest ok = Yes
> 	map archive = No
> 	path = /mnt/DATA
> 	store dos attributes = No
> 	use sendfile = Yes
> 	vfs objects = zfsacl

Now the share is interesting, you want it to use NFSv4 ACLs, but you
have also turned off where the ACLs are stored, I suggest you remove
the 'ea support = No' and 'store dos attributes = No' lines.

Rowland


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