Ceph Version: 14.2.5 Samba Version:4.10.4 OS: Centos 7.6.1810 Procedure: 1，Setup a ceph cluster and create a file system. 2，Setup a samba share with samba vfs ceph plugin. 3，Use 'ceph daemon /var/run/ceph/ceph-client.admin.*****.asok help' to get debug command. 4，It will occurs a segment fault when exec the 3rd command. The call trace list belows: #0 0x00007f35425cb387 in raise () from /lib64/libc.so.6 #1 0x00007f35425cca78 in abort () from /lib64/libc.so.6 #2 0x00007f3545a8fff3 in dump_core () at ../source3/lib/dumpcore.c:338 #3 0x00007f3545a8109b in smb_panic_s3 (why=<optimized out>) at ../source3/lib/util.c:839 #4 0x00007f354627297f in smb_panic (why=why@entry=0x7f35462bb55b "internal error") at ../lib/util/fault.c:174 #5 0x00007f3546272bb6 in fault_report (sig=<optimized out>) at ../lib/util/fault.c:88 #6 sig_fault (sig=<optimized out>) at ../lib/util/fault.c:99 #7 <signal handler called> #8 0x00007f35226d026f in acquire (this=0x564a0a014050) at /usr/src/debug/ceph-14.2.5-1.0.8/build/boost/include/boost/smart_ptr/detail/shared_count.hpp:426 #9 acquire_object_id (this=0x7f350fffe220) at /usr/src/debug/ceph-14.2.5-1.0.8/build/boost/include/boost/spirit/home/classic/core/non_terminal/impl/object_with_id.ipp:157 #10 object_with_id (this=0x7f350fffe220) at /usr/src/debug/ceph-14.2.5-1.0.8/build/boost/include/boost/spirit/home/classic/core/non_terminal/impl/object_with_id.ipp:79 #11 grammar (this=0x7f350fffe220) at /usr/src/debug/ceph-14.2.5-1.0.8/build/boost/include/boost/spirit/home/classic/core/non_terminal/grammar.hpp:51 #12 Json_grammer (semantic_actions=..., this=0x7f350fffe220) at /usr/src/debug/ceph-14.2.5-1.0.8/src/json_spirit/json_spirit_reader_template.h:401 #13 json_spirit::read_range_or_throw<__gnu_cxx::__normal_iterator<char const*, std::string>, json_spirit::Value_impl<json_spirit::Config_map<std::string> > > (begin=123 '{', end=0 '\000', value=...) at /usr/src/debug/ceph-14.2.5-1.0.8/src/json_spirit/json_spirit_reader_template.h:585 #14 0x00007f35226d0c3c in json_spirit::read_range<__gnu_cxx::__normal_iterator<char const*, std::string>, json_spirit::Value_impl<json_spirit::Config_map<std::string> > > ( begin=123 '{', end=..., value=...) at /usr/src/debug/ceph-14.2.5-1.0.8/src/json_spirit/json_spirit_reader_template.h:607 #15 0x00007f35226bb07d in read_string<std::basic_string<char>, json_spirit::Value_impl<json_spirit::Config_map<std::basic_string<char> > > > (value=..., s=<error reading variable: Cannot access memory at address 0x7869666572702263>) at /usr/src/debug/ceph-14.2.5-1.0.8/src/json_spirit/json_spirit_reader.cpp:78 #16 json_spirit::read (s="{\"prefix\": \"get_command_descriptions\"}", value=...) at /usr/src/debug/ceph-14.2.5-1.0.8/src/json_spirit/json_spirit_reader.cpp:78 #17 0x00007f35222953a7 in cmdmap_from_json(std::vector<std::string, std::allocator<std::string> >, std::map<std::string, boost::variant<std::string, bool, long, double, std::vector<std::string, std::allocator<std::string> >, std::vector<long, std::allocator<long> >, std::vector<double, std::allocator<double> > >, std::less<void>, std::allocator<std::pair<std::string const, boost::variant<std::string, bool, long, double, std::vector<std::string, std::allocator<std::string> >, std::vector<long, std::allocator<long> >, std::vector<double, std::allocator<double> > > > > >*, std::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >&) () at /usr/src/debug/ceph-14.2.5-1.0.8/src/common/cmdparse.cc:294 #18 0x00007f3522255492 in AdminSocket::execute_command(std::string const&, ceph::buffer::v14_2_0::list&) () at /opt/rh/devtoolset-8/root/usr/include/c++/8/new:169 #19 0x00007f35222567ef in AdminSocket::do_accept() () at /usr/src/debug/ceph-14.2.5-1.0.8/src/common/admin_socket.cc:341 #20 0x00007f3522258cc8 in AdminSocket::entry (this=0x564a09f3a950) at /usr/src/debug/ceph-14.2.5-1.0.8/src/common/admin_socket.cc:241 #21 0x00007f352270f68f in execute_native_thread_routine () from /usr/lib64/ceph/libceph-common.so.0 #22 0x00007f35466d1ea5 in start_thread () from /lib64/libpthread.so.0 #23 0x00007f35426938dd in clone () from /lib64/libc.so.6