解决Samba服务无法访问 网络名不再可用的问题

新建虚拟机，安装ubuntukylin-14.04.2-desktop-amd64系统

配置IP地址为：192.168.0.205

然后apt-get安装samba，编辑 /etc/samba/smb.conf 

[KylinShare] path=/opt/Share available = yes read only = no valid users = root, sean browsable = yes public = yes writable = yes

smbpasswd -a root 添加用户，service smbd restart 重启samba服务

在Win10上打开资源管理器，在地址栏输入：\\192.168.0.205，可以看到KylinShare文件夹，

但是双击访问KylinShare时却提示没有权限访问或者指定的网络名不再可用。

首先怀疑是防火墙的问题，卸载iptables，不行

百度了一下，有说是SELinux的问题，确保SELinux状态是disabled，还是不行

chmod 777 /opt/Share设置目录权限，照样不行

netstat -ntlp 看了下端口号，139和445都在，确定通信是没有问题的

还有说smb.conf配置有问题的，可是同样的配置在Ubuntu14.04上完全正常，见了鬼了

百度来百度去，翻来覆去就是以上几条原因，各种尝试折腾了半天，始终不行。

最后通过查看 /var/log/samba/下的日志文件发现以下内容

[2019/10/10 03:51:11.787782,  0] ../source3/lib/popt_common.c:68(popt_s3_talloc_log_fn)   talloc: access after free error - first free may be at ../source3/smbd/open.c:4026 [2019/10/10 03:51:11.787821,  0] ../source3/lib/popt_common.c:68(popt_s3_talloc_log_fn)   Bad talloc magic value - access after free [2019/10/10 03:51:11.787827,  0] ../source3/lib/util.c:789(smb_panic_s3)   PANIC (pid 3206): Bad talloc magic value - access after free [2019/10/10 03:51:11.799969,  0] ../source3/lib/util.c:900(log_stack_trace)   BACKTRACE: 34 stack frames:    #0 /usr/lib/x86_64-linux-gnu/samba/libsmbregistry.so.0(log_stack_trace+0x1a) [0x7f3f251431da]    #1 /usr/lib/x86_64-linux-gnu/samba/libsmbregistry.so.0(smb_panic_s3+0x20) [0x7f3f251432b0]    #2 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x2f) [0x7f3f25eba8df]    #3 /usr/lib/x86_64-linux-gnu/libtalloc.so.2(+0x1b5f) [0x7f3f22c41b5f]    #4 /usr/lib/x86_64-linux-gnu/libtalloc.so.2(_talloc_steal_loc+0xab) [0x7f3f22c4877b]    #5 /usr/lib/x86_64-linux-gnu/libtalloc.so.2(_talloc_move+0x13) [0x7f3f22c487b3]    #6 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(+0x18b408) [0x7f3f25afc408]    #7 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(+0x18b811) [0x7f3f25afc811]    #8 /usr/lib/x86_64-linux-gnu/samba/libdbwrap.so.0(+0x51ed) [0x7f3f201071ed]    #9 /usr/lib/x86_64-linux-gnu/libtdb.so.1(+0x8745) [0x7f3f1ceb4745]    #10 /usr/lib/x86_64-linux-gnu/libtdb.so.1(tdb_parse_record+0x6c) [0x7f3f1ceafedc]    #11 /usr/lib/x86_64-linux-gnu/samba/libdbwrap.so.0(+0x5559) [0x7f3f20107559]    #12 /usr/lib/x86_64-linux-gnu/samba/libdbwrap.so.0(dbwrap_parse_record+0x1b) [0x7f3f20104dbb]    #13 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(fetch_share_mode_unlocked+0x54) [0x7f3f25afd484]    #14 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(get_file_infos+0x60) [0x7f3f25af6450]    #15 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(smbd_dirptr_get_entry+0x738) [0x7f3f25a1f188]    #16 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(smbd_dirptr_lanman2_entry+0x1c5) [0x7f3f25a53095]    #17 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(+0x140fc0) [0x7f3f25ab1fc0]    #18 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(smbd_smb2_request_process_query_directory+0x2e4) [0x7f3f25ab2634]    #19 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(smbd_smb2_request_dispatch+0xcad) [0x7f3f25a9fe8d]    #20 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(+0x12fab2) [0x7f3f25aa0ab2]    #21 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(run_events_poll+0x16c) [0x7f3f23ddb95c]    #22 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(+0x25bb0) [0x7f3f23ddbbb0]    #23 /usr/lib/x86_64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x8d) [0x7f3f22a34d5d]    #24 /usr/lib/x86_64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x1b) [0x7f3f22a34efb]    #25 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(smbd_process+0x6c9) [0x7f3f25a8f1f9]    #26 smbd(+0x96b6) [0x7f3f265546b6]    #27 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(run_events_poll+0x16c) [0x7f3f23ddb95c]    #28 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(+0x25bb0) [0x7f3f23ddbbb0]    #29 /usr/lib/x86_64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x8d) [0x7f3f22a34d5d]    #30 /usr/lib/x86_64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x1b) [0x7f3f22a34efb]    #31 smbd(main+0x15b4) [0x7f3f265526c4]    #32 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f3f2268cec5]    #33 smbd(+0x7a96) [0x7f3f26552a96]

原来是talloc问题，又百度一通，发现可以通过下面的操作解决 

重新配置samba服务，终于可以访问KylinShare目录了，整个世界清静了