[Samba] ctdb error after upgrade to 4.12.10

Mon Nov 9 15:01:47 UTC 2020

Dear List,

I updated to samba 4.12.10-SerNet-Debian-9.buster from 4.12.9
and did a

gluster volume set volume performance.write-behind off

Now I get this in /var/log/syslog and randomly people don't get access
to a shae.

Nov  9 15:56:14 ctdb-host smbd[16832]: [2020/11/09 15:56:14.078120,  0]
../../source3/lib/popt_common.c:68(popt_s3_talloc_log_fn)
Nov  9 15:56:14 ctdb-host smbd[16832]:   talloc: access after free error
- first free may be at ../../source3/modules/vfs_glusterfs.c:347
Nov  9 15:56:14 ctdb-host smbd[16832]: [2020/11/09 15:56:14.078173,  0]
../../source3/lib/popt_common.c:68(popt_s3_talloc_log_fn)
Nov  9 15:56:14 ctdb-host smbd[16832]:   Bad talloc magic value - access
after free
Nov  9 15:56:14 ctdb-host smbd[16832]: [2020/11/09 15:56:14.078184,  0]
../../source3/lib/util.c:830(smb_panic_s3)
Nov  9 15:56:14 ctdb-host smbd[16832]:   PANIC (pid 16832): Bad talloc
magic value - access after free
Nov  9 15:56:14 ctdb-host smbd[16832]: [2020/11/09 15:56:14.078539,  0]
../../lib/util/fault.c:265(log_stack_trace)
Nov  9 15:56:14 ctdb-host smbd[16832]:   BACKTRACE: 34 stack frames:
Nov  9 15:56:14 ctdb-host smbd[16832]:    #0
/usr/lib/x86_64-linux-gnu/samba/libsamba-util.so.0(log_stack_trace+0x30)
[0x7f53811addde]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #1
/usr/lib/x86_64-linux-gnu/samba/libsmbconf.so.0(smb_panic_s3+0x24)
[0x7f5380c2b05f]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #2
/usr/lib/x86_64-linux-gnu/samba/libsamba-util.so.0(smb_panic+0x2c)
[0x7f53811adee1]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #3
/usr/lib/x86_64-linux-gnu/samba/libtalloc.so.2(+0x6f9b) [0x7f5380dcdf9b]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #4
/usr/lib/x86_64-linux-gnu/samba/libtalloc.so.2(+0x6fb2) [0x7f5380dcdfb2]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #5
/usr/lib/x86_64-linux-gnu/samba/libtalloc.so.2(_talloc_free+0x188)
[0x7f5380dcda22]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #6
/usr/lib/x86_64-linux-gnu/samba/vfs/glusterfs.so(+0x645c) [0x7f537b16045c]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #7
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base-samba4.so(smb_vfs_call_connect+0x21)
[0x7f5380fdcddd]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #8
/usr/lib/x86_64-linux-gnu/samba/vfs/acl_xattr.so(+0x1765) [0x7f537b156765]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #9
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base-samba4.so(smb_vfs_call_connect+0x21)
[0x7f5380fdcddd]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #10
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base-samba4.so(+0x1e1e43)
[0x7f5380ff4e43]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #11
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base-samba4.so(make_connection_smb2+0x53)
[0x7f5380ff5fac]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #12
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base-samba4.so(smbd_smb2_request_process_tcon+0x45c)
[0x7f538100c972]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #13
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base-samba4.so(smbd_smb2_request_dispatch+0x12e2)
[0x7f5381004609]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #14
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base-samba4.so(+0x1f34f1)
[0x7f53810064f1]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #15
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(tevent_common_invoke_fd_handler+0x84)
[0x7f5380df4dcd]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #16
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0xd378) [0x7f5380dfb378]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #17
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0xafc8) [0x7f5380df8fc8]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #18
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(_tevent_loop_once+0xa2)
[0x7f5380df45e0]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #19
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(tevent_common_loop_wait+0x21)
[0x7f5380df47db]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #20
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0xaf76) [0x7f5380df8f76]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #21
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(_tevent_loop_wait+0xa)
[0x7f5380df4837]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #22
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base-samba4.so(smbd_process+0x909)
[0x7f5380ff3b2b]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #23 /usr/sbin/smbd(+0xccc3)
[0x55c2f0fcccc3]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #24
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(tevent_common_invoke_fd_handler+0x84)
[0x7f5380df4dcd]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #25
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0xd378) [0x7f5380dfb378]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #26
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0xafc8) [0x7f5380df8fc8]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #27
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(_tevent_loop_once+0xa2)
[0x7f5380df45e0]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #28
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(tevent_common_loop_wait+0x21)
[0x7f5380df47db]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #29
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(+0xaf76) [0x7f5380df8f76]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #30
/usr/lib/x86_64-linux-gnu/samba/libtevent.so.0(_tevent_loop_wait+0xa)
[0x7f5380df4837]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #31
/usr/sbin/smbd(main+0x1d21) [0x55c2f0fceb66]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #32
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7f53802b109b]
Nov  9 15:56:14 ctdb-host smbd[16832]:    #33
/usr/sbin/smbd(_start+0x2a) [0x55c2f0fc712a]
Nov  9 15:56:14 ctdb-host smbd[16832]: [2020/11/09 15:56:14.078657,  0]
../../source3/lib/util.c:842(smb_panic_s3)
Nov  9 15:56:14 ctdb-host smbd[16832]:   smb_panic(): calling panic
action [/usr/share/samba/scripts/panic-action 16832]
Nov  9 15:56:14 ctdb-host smbd[16832]: [2020/11/09 15:56:14.332923,  0]
../../source3/lib/util.c:850(smb_panic_s3)
Nov  9 15:56:14 ctdb-host smbd[16832]:   smb_panic(): action returned
status 0
Nov  9 15:56:14 ctdb-host smbd[16832]: [2020/11/09 15:56:14.332972,  0]
../../source3/lib/dumpcore.c:315(dump_core)
Nov  9 15:56:14 ctdb-host smbd[16832]:   dumping core in
/var/log/samba/cores/smbd

Shall I roll back?

Best regards

Bene

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