Systemd SEGV when reloading – Ubuntu 24.04

Systemd SEGV when reloading – Ubuntu 24.04(ubuntuforums.org)

3 points by mhkool 1 year ago | 5 comments

mhkool 1 year ago |

any ideas on how to resolve this?

is_taken 1 year ago | |

Are you sure the memory in this system is ok?

As it dumped core, could be interesting to "gdb it" and get a stackframe.

mhkool 1 year ago | | |

The systemd config is default and it should dump core and logs a message that it dumped core but I have not been able to find it. Usually core dumps are in /var/lib/systemd/coredump but the directory is empty.

The server has ECC memory and there are no messages in the syslog about ECC failures. The SEGV occurred on two consecutive days when systemd was reloading so for the moment I find it unlikely that memory may be the root cause but looking at a core dump would certainly help. Where is it?

(gdb) bt full #0 0x00007fec4596675b in kill () at ../sysdeps/unix/syscall-template.S:120 No locals. #1 0x000055d907cfab1c in crash (sig=11) at ../src/core/main.c:257 sa = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {0 <repeats 16 times>}}, sa_flags = 0, sa_restorer = 0x0} pid = <optimized out> __func__ = "crash" __PRETTY_FUNCTION__ = "crash" #2 <signal handler called> No locals. #3 0x000055d907d74d73 in unit_active_state (u=<optimized out>) at ../src/core/unit.c:830 __PRETTY_FUNCTION__ = "unit_active_state" #4 0x000055d907d84d86 in unit_may_gc (u=0x55d908ddfa00) at ../src/core/unit.c:392 state = <optimized out> r = <optimized out> __PRETTY_FUNCTION__ = <optimized out> __func__ = <optimized out> #5 0x000055d907d739fe in unit_may_gc (u=0x55d908ddfa00) at ../src/core/unit.c:389 state = <optimized out> r = <optimized out> __PRETTY_FUNCTION__ = <optimized out> __func__ = <optimized out> _found = <optimized out> __assert_in_set = <optimized out> _error = <optimized out> _u = <optimized out> _l = <optimized out> #6 unit_add_to_gc_queue (u=0x55d908ddfa00) at ../src/core/unit.c:468 __PRETTY_FUNCTION__ = "unit_add_to_gc_queue" #7 0x000055d907d85ab1 in unit_clear_dependencies (u=0x55d908da3000) at ../src/core/unit.c:555 other_deps = 0x0 other = 0x55d908ddfa00 deps = 0x55d908dc4878 __PRETTY_FUNCTION__ = <optimized out> #8 unit_free (u=0x55d908da3000) at ../src/core/unit.c:698 slice = 0x55d908cb92a0 t = 0x0 __PRETTY_FUNCTION__ = <optimized out> #9 0x000055d907d45d05 in unit_free (u=<optimized out>) at ../src/core/unit.c:654 slice = <optimized out> t = <optimized out> __PRETTY_FUNCTION__ = <optimized out> __unique_prefix_i15 = <optimized out> j = <optimized out> j = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> #10 manager_clear_jobs_and_units (m=m@entry=0x55d908cb78f0) at ../src/core/manager.c:1421 u = <optimized out> __PRETTY_FUNCTION__ = <optimized out> #11 0x000055d907d4b01a in manager_clear_jobs_and_units (m=0x55d908cb78f0) at ../src/core/manager.c:1418 u = <optimized out> __PRETTY_FUNCTION__ = <optimized out> #12 manager_reload (m=0x55d908cb78f0) at ../src/core/manager.c:3826 reloading = 0x0 fds = 0x7fec45112ba8 f = 0x55d908f6c940 r = <optimized out> __PRETTY_FUNCTION__ = "manager_reload" __func__ = "manager_reload" #13 0x000055d907cf9a7b in invoke_main_loop (ret_error_message=0x7ffd4b3057f0, ret_switch_root_init=<synthetic pointer>, ret_switch_root_dir=<synthetic pointer>, ret_fds=0x7ffd4b3057e0, ret_shutdown_verb=<synthetic pointer>, ret_retval=<synthetic pointer>, ret_reexecute=<synthetic pointer>, saved_rlimit_memlock=0x7ffd4b305820, saved_rlimit_nofile=0x7ffd4b305830, m=0x55d908cb78f0) at ../src/core/main.c:1934 saved_log_target = <optimized out> saved_log_level = <optimized out> r = <optimized out> r = <optimized out> __PRETTY_FUNCTION__ = <optimized out> __func__ = <optimized out> _error = <optimized out> _level = <optimized out> _e = <optimized out> saved_log_target = <optimized out> saved_log_level = <optimized out> _level = <optimized out> _e = <optimized out> _level = <optimized out> _e = <optimized out> _level = <optimized out> _e = <optimized out> _ptr_ = <optimized out> _ptr_ = <optimized out> _level = <optimized out> _e = <optimized out> table = <optimized out> _level = <optimized out> _e = <optimized out> #14 main (argc=1, argv=0x7ffd4b305ab8) at ../src/core/main.c:2910 initrd_timestamp = {realtime = 0, monotonic = 0} userspace_timestamp = {realtime = 1726568591653978, monotonic = 37908672} kernel_timestamp = {realtime = 1726568553745306, monotonic = 0} security_start_timestamp = {realtime = 1726568591655330, monotonic = 37910024} security_finish_timestamp = {realtime = 1726568591655914, monotonic = 37910609} saved_rlimit_nofile = {rlim_cur = 1024, rlim_max = 4096} saved_rlimit_memlock = {rlim_cur = 65536, rlim_max = 65536} skip_setup = <optimized out> loaded_policy = false queue_default_job = <optimized out> first_boot = <optimized out> reexecute = false switch_root_dir = 0x0 switch_root_init = 0x0 before_startup = <optimized out> after_startup = <optimized out> timespan = "\000\000\000\000\000\000\000\000\000\303t\255\211[\367\r\000\000\000\000\000\000\000\000\310\375\377\377\377\377\377\377\002", '\000' <repeats 15 times>, "\002\000\000\000\000\000\000\000\006\000\000\000\000\000\000\200" shutdown_verb = 0x0 error_message = 0x0 r = <optimized out> retval = 1 m = 0x55d908cb78f0 fds = 0x0 finish = <optimized out> systemd = "systemd" __func__ = "main" __PRETTY_FUNCTION__ = "main" _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> _head = <optimized out> _item = <optimized out> #10 manager_clear_jobs_and_units (m=m@entry=0x55d908cb78f0) at ../src/core/manager.c:1421 u = <optimized out> __PRETTY_FUNCTION__ = <optimized out> #11 0x000055d907d4b01a in manager_clear_jobs_and_units (m=0x55d908cb78f0) at ../src/core/manager.c:1418 u = <optimized out> __PRETTY_FUNCTION__ = <optimized out> #12 manager_reload (m=0x55d908cb78f0) at ../src/core/manager.c:3826 reloading = 0x0 fds = 0x7fec45112ba8 f = 0x55d908f6c940 r = <optimized out> __PRETTY_FUNCTION__ = "manager_reload" __func__ = "manager_reload" #13 0x000055d907cf9a7b in invoke_main_loop (ret_error_message=0x7ffd4b3057f0, ret_switch_root_init=<synthetic pointer>, ret_switch_root_dir=<synthetic pointer>, ret_fds=0x7ffd4b3057e0, ret_shutdown_verb=<synthetic pointer>, ret_retval=<synthetic pointer>, ret_reexecute=<synthetic pointer>, saved_rlimit_memlock=0x7ffd4b305820, saved_rlimit_nofile=0x7ffd4b305830, m=0x55d908cb78f0) at ../src/core/main.c:1934 saved_log_target = <optimized out> saved_log_level = <optimized out> r = <optimized out> r = <optimized out> __PRETTY_FUNCTION__ = <optimized out> __func__ = <optimized out> _error = <optimized out> _level = <optimized out> _e = <optimized out> saved_log_target = <optimized out> saved_log_level = <optimized out> _level = <optimized out> _e = <optimized out> _level = <optimized out> _e = <optimized out> _level = <optimized out> _e = <optimized out> _ptr_ = <optimized out> _ptr_ = <optimized out> _level = <optimized out> _e = <optimized out> table = <optimized out> _level = <optimized out> _e = <optimized out> #14 main (argc=1, argv=0x7ffd4b305ab8) at ../src/core/main.c:2910 initrd_timestamp = {realtime = 0, monotonic = 0} userspace_timestamp = {realtime = 1726568591653978, monotonic = 37908672} kernel_timestamp = {realtime = 1726568553745306, monotonic = 0} security_start_timestamp = {realtime = 1726568591655330, monotonic = 37910024} security_finish_timestamp = {realtime = 1726568591655914, monotonic = 37910609} saved_rlimit_nofile = {rlim_cur = 1024, rlim_max = 4096} saved_rlimit_memlock = {rlim_cur = 65536, rlim_max = 65536} skip_setup = <optimized out> loaded_policy = false queue_default_job = <optimized out> first_boot = <optimized out> reexecute = false switch_root_dir = 0x0 switch_root_init = 0x0 before_startup = <optimized out> after_startup = <optimized out> timespan = "\000\000\000\000\000\000\000\000\000\303t\255\211[\367\r\000\000\000\000\000\000\000\000\310\375\377\377\377\377\377\377\002", '\000' <repeats 15 times>, "\002\000\000\000\000\000\000\000\006\000\000\000\000\000\000\200" shutdown_verb = 0x0 error_message = 0x0 r = <optimized out> retval = 1 m = 0x55d908cb78f0 fds = 0x0 finish = <optimized out> systemd = "systemd" __func__ = "main" __PRETTY_FUNCTION__ = "main"