[Pkg-samba-maint] Bug#968036: samba: segfault with aio_pthread
Josep M. Perez
josep.m.perez at gmail.com
Fri Aug 7 09:33:25 BST 2020
Package: samba
Version: 2:4.12.5+dfsg-3
Severity: normal
Tags: upstream
X-Debbugs-Cc: josep.m.perez at gmail.com
Dear Maintainer,
* What led up to the situation?
Enabled aio_pthread.
* What exactly did you do (or not do) that was effective (or
ineffective)?
Access by a Mac OS client seems to crash smbd from time to time.
* What was the outcome of this action?
* What outcome did you expect instead?
A backtrace of the crash follows:
Core was generated by `/usr/sbin/smbd --foreground --no-process-group'.
Program terminated with signal SIGABRT, Aborted.
#0 0x00007fc960969cb1 in __clear_internal_signals (set=<optimized out>) at
../sysdeps/unix/sysv/linux/internal-signals.h:74
74 ../sysdeps/unix/sysv/linux/internal-signals.h: No such file or
directory.
[Current thread is 1 (Thread 0x7fc95f144a40 (LWP 70077))]
(gdb) bt
#0 0x00007fc960969cb1 in __clear_internal_signals (set=<optimized out>) at
../sysdeps/unix/sysv/linux/internal-signals.h:74
#1 __libc_signal_block_app (set=0x7ffedd750e20) at
../sysdeps/unix/sysv/linux/internal-signals.h:75
#2 __GI_raise (sig=0, sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:40
#3 0x00007fc960953537 in __GI_abort () at abort.c:79
#4 0x00007fc9612cd350 in dump_core () at ../../source3/lib/dumpcore.c:338
#5 0x00007fc9612f72f6 in smb_panic_s3 (why=0x7fc961704ce6 "internal error") at
../../source3/lib/util.c:853
#6 0x00007fc9616f2b9f in smb_panic (why=why at entry=0x7fc961704ce6 "internal
error") at ../../lib/util/fault.c:174
#7 0x00007fc9616f2dfd in fault_report (sig=11) at ../../lib/util/fault.c:88
#8 sig_fault (sig=11) at ../../lib/util/fault.c:99
#9 <signal handler called>
#10 0x00007fc9616ef892 in timeval_add (tv=tv at entry=0xb8, secs=20, usecs=0) at
../../lib/util/time.c:651
#11 0x00007fc9616ef8dc in timeval_sum (tv1=tv1 at entry=0xb8,
tv2=tv2 at entry=0x7ffedd751780) at ../../lib/util/time.c:663
#12 0x00007fc96150f5ee in request_timed_out (req=req at entry=0x0, timeout=...) at
../../source3/smbd/open.c:2659
#13 0x00007fc961517f4f in schedule_async_open (req=0x0) at
../../source3/smbd/open.c:3008
#14 open_file_ntcreate (fsp=<optimized out>, pinfo=0x7ffedd7518b0,
private_flags=16, lease=<optimized out>, oplock_request=8,
new_dos_attributes=0, create_options=0,
create_disposition=3, share_access=7, access_mask=<optimized out>, req=0x0,
conn=0x55fc377c0a70) at ../../source3/smbd/open.c:3719
#15 create_file_unixpath (conn=conn at entry=0x55fc377c0a70, req=req at entry=0x0,
smb_fname=smb_fname at entry=0x55fc37980d70, access_mask=access_mask at entry=0,
share_access=share_access at entry=7,
create_disposition=create_disposition at entry=3, create_options=0,
file_attributes=0, oplock_request=8, lease=<optimized out>,
allocation_size=0, private_flags=16, sd=0x0, ea_list=0x0,
result=0x7ffedd751d18, pinfo=0x0) at ../../source3/smbd/open.c:5592
#16 0x00007fc961515bda in create_file_unixpath (conn=conn at entry=0x55fc377c0a70,
req=req at entry=0x55fc377fcf80, smb_fname=smb_fname at entry=0x55fc3791b3d0,
access_mask=access_mask at entry=386, share_access=share_access at entry=7,
create_disposition=create_disposition at entry=5, create_options=0,
file_attributes=128, oplock_request=0,
lease=<optimized out>, allocation_size=0, private_flags=0, sd=0x0,
ea_list=0x0, result=0x7ffedd7520e8, pinfo=0x7ffedd7520e4) at
../../source3/smbd/open.c:5512
#17 0x00007fc961518ff8 in create_file_default (conn=0x55fc377c0a70,
req=0x55fc377fcf80, root_dir_fid=<optimized out>, smb_fname=0x55fc3791b3d0,
access_mask=386, share_access=7,
create_disposition=5, create_options=0, file_attributes=128,
oplock_request=0, lease=0x0, allocation_size=0, private_flags=0, sd=0x0,
ea_list=0x0, result=0x55fc378e23d8,
pinfo=0x55fc378e23ec, in_context_blobs=0x7ffedd752390,
out_context_blobs=0x55fc378e25f0) at ../../source3/smbd/open.c:6010
#18 0x00007fc95ea43f47 in fruit_create_file (handle=0x55fc377c09d0,
req=0x55fc377fcf80, root_dir_fid=<optimized out>, smb_fname=0x55fc3791b3d0,
access_mask=386, share_access=7,
create_disposition=5, create_options=0, file_attributes=128,
oplock_request=0, lease=0x0, allocation_size=0, private_flags=0, sd=0x0,
ea_list=0x0, result=0x55fc378e23d8,
pinfo=0x55fc378e23ec, in_context_blobs=0x7ffedd752390,
out_context_blobs=0x55fc378e25f0) at ../../source3/modules/vfs_fruit.c:4035
#19 0x00007fc96154de75 in smbd_smb2_create_send (in_context_blobs=...,
in_name=<optimized out>, in_create_options=<optimized out>,
in_create_disposition=<optimized out>,
in_share_access=<optimized out>, in_file_attributes=<optimized out>,
in_desired_access=<optimized out>, in_impersonation_level=<optimized out>,
in_oplock_level=<optimized out>,
smb2req=0x55fc37904230, ev=<optimized out>, mem_ctx=0x55fc37904230) at
../../source3/smbd/smb2_create.c:983
#20 smbd_smb2_request_process_create (smb2req=smb2req at entry=0x55fc37904230) at
../../source3/smbd/smb2_create.c:268
#21 0x00007fc96154557e in smbd_smb2_request_dispatch
(req=req at entry=0x55fc37904230) at ../../source3/smbd/smb2_server.c:2709
#22 0x00007fc961546290 in smbd_smb2_io_handler (fde_flags=<optimized out>,
xconn=0x55fc377a7be0) at ../../source3/smbd/smb2_server.c:4060
#23 smbd_smb2_connection_handler (ev=<optimized out>, fde=<optimized out>,
flags=<optimized out>, private_data=<optimized out>) at
../../source3/smbd/smb2_server.c:4098
#24 0x00007fc960afa70d in tevent_common_invoke_fd_handler
(fde=fde at entry=0x55fc377afaa0, flags=1, removed=removed at entry=0x0) at
../../tevent_fd.c:138
#25 0x00007fc960b00a77 in epoll_event_loop (tvalp=0x7ffedd752540,
epoll_ev=0x55fc37786ca0) at ../../tevent_epoll.c:736
#26 epoll_event_loop_once (ev=<optimized out>, location=<optimized out>) at
../../tevent_epoll.c:937
#27 0x00007fc960afec07 in std_event_loop_once (ev=0x55fc3776f380,
location=0x7fc961645c40 "../../source3/smbd/process.c:4170") at
../../tevent_standard.c:110
#28 0x00007fc960af9df4 in _tevent_loop_once (ev=ev at entry=0x55fc3776f380,
location=location at entry=0x7fc961645c40 "../../source3/smbd/process.c:4170") at
../../tevent.c:772
#29 0x00007fc960afa09b in tevent_common_loop_wait (ev=0x55fc3776f380,
location=0x7fc961645c40 "../../source3/smbd/process.c:4170") at
../../tevent.c:895
#30 0x00007fc960afeba7 in std_event_loop_wait (ev=0x55fc3776f380,
location=0x7fc961645c40 "../../source3/smbd/process.c:4170") at
../../tevent_standard.c:141
#31 0x00007fc961535687 in smbd_process (ev_ctx=0x55fc3776f380,
msg_ctx=<optimized out>, sock_fd=<optimized out>, interactive=<optimized out>)
at ../../source3/smbd/process.c:4170
#32 0x000055fc367ecd51 in smbd_accept_connection (ev=0x55fc3776f380,
fde=<optimized out>, flags=<optimized out>, private_data=<optimized out>) at
../../source3/smbd/server.c:1012
#33 0x00007fc960afa70d in tevent_common_invoke_fd_handler
(fde=fde at entry=0x55fc377b0180, flags=1, removed=removed at entry=0x0) at
../../tevent_fd.c:138
#34 0x00007fc960b00a77 in epoll_event_loop (tvalp=0x7ffedd7527c0,
epoll_ev=0x55fc37786b00) at ../../tevent_epoll.c:736
#35 epoll_event_loop_once (ev=<optimized out>, location=<optimized out>) at
../../tevent_epoll.c:937
#36 0x00007fc960afec07 in std_event_loop_once (ev=0x55fc3776f380,
location=0x55fc367f2f18 "../../source3/smbd/server.c:1359") at
../../tevent_standard.c:110
#37 0x00007fc960af9df4 in _tevent_loop_once (ev=ev at entry=0x55fc3776f380,
location=location at entry=0x55fc367f2f18 "../../source3/smbd/server.c:1359") at
../../tevent.c:772
#38 0x00007fc960afa09b in tevent_common_loop_wait (ev=0x55fc3776f380,
location=0x55fc367f2f18 "../../source3/smbd/server.c:1359") at
../../tevent.c:895
#39 0x00007fc960afeba7 in std_event_loop_wait (ev=0x55fc3776f380,
location=0x55fc367f2f18 "../../source3/smbd/server.c:1359") at
../../tevent_standard.c:141
#40 0x000055fc367e8aff in smbd_parent_loop (parent=0x55fc377896c0,
ev_ctx=0x55fc3776f380) at ../../source3/smbd/server.c:1359
#41 main (argc=<optimized out>, argv=<optimized out>) at
../../source3/smbd/server.c:2197
Thanks in advance!
Cheers,
Josep M. Perez
-- Package-specific info:
* /etc/samba/smb.conf present, and attached
* /var/lib/samba/dhcp.conf present, and attached
-- System Information:
Debian Release: bullseye/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.7.0-2-amd64 (SMP w/12 CPU threads)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages samba depends on:
ii adduser 3.118
ii dpkg 1.20.5
ii init-system-helpers 1.58
ii libbsd0 0.10.0-1
ii libc6 2.31-3
ii libgnutls30 3.6.14-2+b1
ii libldb2 2:2.1.4-2
ii libpam-modules 1.3.1-5
ii libpam-runtime 1.3.1-5
ii libpopt0 1.18-1
ii libpython3.8 3.8.5-2
ii libtalloc2 2.3.1-1
ii libtasn1-6 4.16.0-2
ii libtdb1 1.4.3-1
ii libtevent0 0.10.2-1
ii libwbclient0 2:4.12.5+dfsg-3
ii lsb-base 11.1.0
ii procps 2:3.3.16-5
ii python3 3.8.2-3
ii python3-dnspython 1.16.0-2
ii python3-samba 2:4.12.5+dfsg-3
ii samba-common 2:4.12.5+dfsg-3
ii samba-common-bin 2:4.12.5+dfsg-3
ii samba-libs 2:4.12.5+dfsg-3
ii tdb-tools 1.4.3-1
Versions of packages samba recommends:
ii attr 1:2.4.48-5
ii logrotate 3.16.0-3
ii python3-markdown 3.2.2-2
ii samba-dsdb-modules 2:4.12.5+dfsg-3
ii samba-vfs-modules 2:4.12.5+dfsg-3
Versions of packages samba suggests:
ii bind9 1:9.16.4-1+b1
ii bind9-utils [bind9utils] 1:9.16.4-1+b1
ii bind9utils 1:9.16.4-1
pn ctdb <none>
pn ldb-tools <none>
pn ntp | chrony <none>
ii smbldap-tools 0.9.11-1
pn ufw <none>
pn winbind <none>
-- no debconf information
-------------- next part --------------
#
# Sample configuration file for the Samba suite for Debian GNU/Linux.
#
#
# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options most of which
# are not shown in this example
#
# Some options that are often worth tuning have been included as
# commented-out examples in this file.
# - When such options are commented with ";", the proposed setting
# differs from the default Samba behaviour
# - When commented with "#", the proposed setting is the default
# behaviour of Samba but the option is considered important
# enough to be mentioned here
#
# NOTE: Whenever you modify this file you should run the command
# "testparm" to check that you have not made any basic syntactic
# errors.
#======================= Global Settings =======================
[global]
strict allocate = yes
## Browsing/Identification ###
# Change this to the workgroup/NT-domain name your Samba server will part of
# workgroup = WORKGROUP
workgroup = LOCAL
# Windows Internet Name Serving Support Section:
# WINS Support - Tells the NMBD component of Samba to enable its WINS Server
# wins support = no
# WINS Server - Tells the NMBD components of Samba to be a WINS Client
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
; wins server = w.x.y.z
# If we receive WINS server info from DHCP, override the options above.
include = /var/lib/samba/dhcp.conf
# This will prevent nmbd to search for NetBIOS names through DNS.
dns proxy = no
#### Networking ####
# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
; interfaces = 127.0.0.0/8 eth0
; interfaces = 127.0.0.0/8 enp2s0
; interfaces = 127.0.0.0/8 bond0
interfaces = 127.0.0.0/8 enp1s0 enp2s0
# Only bind to the named interfaces and/or networks; you must use the
# 'interfaces' option above to use this.
# It is recommended that you enable this feature if your Samba machine is
# not protected by a firewall or is a firewall itself. However, this
# option cannot handle dynamic or non-broadcast interfaces correctly.
; bind interfaces only = yes
#### Debugging/Accounting ####
# This tells Samba to use a separate log file for each machine
# that connects
log file = /var/log/samba/log.%m
# Cap the size of the individual log files (in KiB).
max log size = 1000
# If you want Samba to only log through syslog then set the following
# parameter to 'yes'.
# syslog only = no
# We want Samba to log a minimum amount of information to syslog. Everything
# should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log
# through syslog you should set the following parameter to something higher.
# syslog = 0
# Do something sensible when Samba crashes: mail the admin a backtrace
panic action = /usr/share/samba/panic-action %d
logging = file systemd
log level = 1 auth_audit:2
####### Authentication #######
# Server role. Defines in which mode Samba will operate. Possible
# values are "standalone server", "member server", "classic primary
# domain controller", "classic backup domain controller", "active
# directory domain controller".
#
# Most people will want "standalone server" or "member server".
# Running as "active directory domain controller" will require first
# running "samba-tool domain provision" to wipe databases and create a
# new domain.
server role = standalone server
# If you are using encrypted passwords, Samba will need to know what
# password database type you are using.
passdb backend = tdbsam
obey pam restrictions = yes
# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
unix password sync = yes
# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Ian Kahan <<kahan at informatik.tu-muenchen.de> for
# sending the correct chat script for the passwd program in Debian Sarge).
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# 'passwd program'. The default is 'no'.
pam password change = yes
# This option controls how unsuccessful authentication attempts are mapped
# to anonymous connections
map to guest = bad user
########## Domains ###########
#
# The following settings only takes effect if 'server role = primary
# classic domain controller', 'server role = backup domain controller'
# or 'domain logons' is set
#
# It specifies the location of the user's
# profile directory from the client point of view) The following
# required a [profiles] share to be setup on the samba server (see
# below)
; logon path = \\%N\profiles\%U
# Another common choice is storing the profile in the user's home directory
# (this is Samba's default)
# logon path = \\%N\%U\profile
# The following setting only takes effect if 'domain logons' is set
# It specifies the location of a user's home directory (from the client
# point of view)
; logon drive = H:
# logon home = \\%N\%U
# The following setting only takes effect if 'domain logons' is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in 'DOS' file format convention
; logon script = logon.cmd
# This allows Unix users to be created on the domain controller via the SAMR
# RPC pipe. The example command creates a user account with a disabled Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u
# This allows machine accounts to be created on the domain controller via the
# SAMR RPC pipe.
# The following assumes a "machines" group exists on the system
; add machine script = /usr/sbin/useradd -g machines -c "%u machine account" -d /var/lib/samba -s /bin/false %u
# This allows Unix groups to be created on the domain controller via the SAMR
# RPC pipe.
; add group script = /usr/sbin/addgroup --force-badname %g
############ Misc ############
# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
; include = /home/samba/etc/smb.conf.%m
# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
; idmap uid = 10000-20000
; idmap gid = 10000-20000
; template shell = /bin/bash
# Setup usershare options to enable non-root users to share folders
# with the net usershare command.
# Maximum number of usershare. 0 (default) means that usershare is disabled.
; usershare max shares = 100
# Allow users who've been granted usershare privileges to create
# public shares, not just authenticated ones
# usershare allow guests = yes
usershare allow guests = no
# fruit:aapl = yes
# fruit:time machine = yes
durable handles = yes
# durable handles = no
kernel oplocks = no
kernel share modes = no
posix locking = no
# oplocks = no
oplocks = yes
# level2 oplocks = no
#vfs objects = fruit streams_xattr recycle
# vfs objects = fruit streams_xattr acl_xattr
# vfs objects = catia fruit streams_xattr acl_xattr aio_pthread
vfs objects = fruit streams_xattr acl_xattr readahead aio_pthread
map acl inherit = yes
store dos attributes = yes
aio_pthread:aio open = yes
# aio read size = 1
# aio write size = 1
# recycle:repository = .recycle
# recycle:keeptree = yes
# recycle:versions = yes
# recycle:touch = yes
# recycle:touch_mtime = yes
sync always = no
strict sync = no
server multi channel support = yes
load printers = no
disable spoolss = yes
show add printer wizard = no
disable netbios = yes
dns proxy = no
deadtime = 1800
# smb encrypt = off
# socket options = TCP_NODELAY IPTOS_LOWDELAY IPTOS_THROUGHPUT SO_RCVBUF=131072 SO_SNDBUF=131072 SO_KEEPALIVE
# min receivefile size = 16384
# use sendfile = yes
# write cache size = 262144
# strict locking = no
# aio read size = 16384
# aio write size = 16384
allow insecure wide links = yes
#======================= Share Definitions =======================
[homes]
comment = Home Directories
browseable = no
# By default, the home directories are exported read-only. Change the
# next parameter to 'no' if you want to be able to write to them.
# read only = yes
read only = no
# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
create mask = 0700
# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
directory mask = 0700
# By default, \\server\username shares can be connected to by anyone
# with access to the samba server.
# The following parameter makes sure that only "username" can connect
# to \\server\username
# This might need tweaking when using external authentication schemes
valid users = %S
follow symlinks = yes
wide links = yes
[TimeMachine]
comment = Time Machine
path = /home/mini2-timemachine/TimeMachine
browseable = yes
read only = no
create mask = 0700
directory mask = 0700
valid users = mini2-timemachine
spotlight = yes
# vfs objects = fruit streams_xattr acl_xattr catia
vfs objects = fruit streams_xattr acl_xattr catia aio_pthread
fruit:aapl = yes
fruit:time machine = yes
# Un-comment the following and create the netlogon directory for Domain Logons
# (you need to configure Samba to act as a domain controller too.)
;[netlogon]
; comment = Network Logon Service
; path = /home/samba/netlogon
; guest ok = yes
; read only = yes
# Un-comment the following and create the profiles directory to store
# users profiles (see the "logon path" option above)
# (you need to configure Samba to act as a domain controller too.)
# The path below should be writable by all users so that their
# profile directory may be created the first time they log on
;[profiles]
; comment = Users profiles
; path = /home/samba/profiles
; guest ok = no
; browseable = no
; create mask = 0600
; directory mask = 0700
[printers]
comment = All Printers
# browseable = no
browseable = yes
path = /var/spool/samba
printable = yes
guest ok = no
read only = yes
create mask = 0700
# Windows clients look for this share name as a source of downloadable
# printer drivers
[print$]
comment = Printer Drivers
path = /var/lib/samba/printers
browseable = yes
read only = yes
guest ok = no
# Uncomment to allow remote administration of Windows print drivers.
# You may need to replace 'lpadmin' with the name of the group your
# admin users are members of.
# Please note that you also need to set appropriate Unix permissions
# to the drivers directory for these users to have write rights in it
; write list = root, @lpadmin
-------------- next part --------------
wins server =enp2s0:192.168.2.1
More information about the Pkg-samba-maint
mailing list