Arch Linux

Please provide a backtrace with debug symbols [1]

[1] https://wiki.archlinux.org/title/Debugging/Getting_traces#Debuginfod

I think this is what you have requested. I'm cutting and pasting. Should I be uploading these as files instead?

(gdb) bt full
#0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
tid = <optimized out>
ret = 0
pd = <optimized out>
old_mask = {__val = {0}}
ret = <optimized out>
#1 0x00007fb6c13bc953 in __pthread_kill_internal (signo=6, threadid=<optimized out>) at pthread_kill.c:78
No locals.
#2 0x00007fb6c136dea8 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
ret = <optimized out>
#3 0x00007fb6c135753d in __GI_abort () at abort.c:79
save_stage = 1
act = {__sigaction_handler = {sa_handler = 0x20, sa_sigaction = 0x20}, sa_mask = {__val = {0, 0, 0, 0, 0, 0, 0, 0, 15436654208441386752, 140422901893920, 26, 140422901787667,
140422901768944, 140422901772362, 77, 140422901785640}}, sa_flags = 3, sa_restorer = 0x7fb6c12fa708}
#4 0x00007fb6c12b909c in log_assert_failed (text=text@entry=0x7fb6c12dc5b6 "close_nointr(fd) != -EBADF", file=file@entry=0x7fb6c12db04a "src/basic/fd-util.c", line=line@entry=77,
func=<optimized out>) at ../systemd-stable/src/basic/log.c:853
No locals.
#5 0x00007fb6c12b917f in safe_close (fd=3) at ../systemd-stable/src/basic/fd-util.c:77
_saved_errno_ = 0
__PRETTY_FUNCTION__ = <optimized out>
#6 0x00007fb6c12a2d1d in bus_close_io_fds (b=b@entry=0x55f0334362f0) at ../systemd-stable/src/libsystemd/sd-bus/sd-bus.c:137
__PRETTY_FUNCTION__ = "bus_close_io_fds"
#7 0x00007fb6c12a2eab in bus_free (b=0x55f0334362f0) at ../systemd-stable/src/libsystemd/sd-bus/sd-bus.c:190
s = <optimized out>
__PRETTY_FUNCTION__ = "bus_free"
#8 0x00007fb6c152447c in ?? () from /usr/lib/libpam.so.0
No symbol table info available.
#9 0x00007fb6c1524fe2 in pam_end () from /usr/lib/libpam.so.0
No symbol table info available.
#10 0x000055f031467f43 in main (argc=<optimized out>, argv=<optimized out>) at login-utils/login.c:1537
child_argv = {0x55f033439973 "/bin/bash", 0x55f033442c50 "-bash", 0x0, 0x7ffd42c1bb20 "-bash", 0x7ffd42c1b7f0 "\003\061\344c",
0x7fb6c13af60e <__vsnprintf_internal+126> "H\213\224$\250", 0x7ffd42c1bb20 "-bash", 0x7ffd42c1bb31 "ID3\360U", 0x7ffd42c1bc2a "", 0x0}
child_argc = <optimized out>
pwd = <optimized out>
cxt = {tty_path = 0x55f03341e820 "/dev/tty2", tty_name = 0x55f03341e825 "tty2", tty_number = 0x55f03341e828 "2", tty_mode = 384, username = 0x55f033439950 "fakeuser",
cmd_username = 0x55f03341c5f0 "fakeuser", pwd = 0x55f033439130, pwdbuf = 0x55f033439950 "fakeuser", pamh = 0x55f03341c610, conv = {conv = 0x7fb6c151d930 <misc_conv>,
appdata_ptr = 0x0}, thishost = 0x55f03341ff90 "psycho", thisdomain = 0x0, hostname = 0x0, hostaddress = '\000' <repeats 15 times>, pid = 14066, quiet = 0, remote = 0,
nohost = 0, noauth = 0, keep_env = 1}

Maybe something to do with libpam. Unfortunately pam hasn't been rebuilt since Sep'21 so no debug symbols. Is your pam config modified?

Did this work previously i.e. is it a regression? Possible suspects are glibc and systemd which were updated recently.

This problem occurred while switching from NIS to LDAP for authentication. So I have no historical information.
pam configuration is modified.
files:
passwd
su
system-auth
all have
sufficient pam_ldap.so
added to various sections.

Ok. Bottom line is /usr/bin/login shouldn't crash like that. Please report it upstream.

> Please report it upstream

Ping? I don't see anything in [1].

[1] https://github.com/util-linux/util-linux/issues

Due to other problems with Arch I had to switch to Ubuntu (It's a work desktop) . I experienced similar login problems. I believe some combination of using a login manager and fixing PAM config files allowed me to use LDAP. I have reported the bug upstream.

https://github.com/util-linux/util-linux/issues/2121