[gentoo-user] su hangs

[Nilesh Govindrajan]

I have pam_pgsql and libnss-pgsql installed. On one server su works
perfectly, but on the other one when I try to su (both, with and
without -l) it hangs.

Both are using systemd and the same kernel (they are same config
except # of HDDs).

Here's the strace -

fstat(4, {st_mode=S_IFREG|0644, st_size=10523, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x2afda592000
read(4, "#\n# /etc/login.defs - Configurat"..., 4096) = 4096
read(4, "ogin configuration initializatio"..., 4096) = 4096
read(4, "\n#ENCRYPT_METHOD DES\n\n#\n# Only w"..., 4096) = 2331
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0x2afda592000, 4096)             = 0
access("/var/run/utmpx", F_OK)          = -1 ENOENT (No such file or directory)
open("/var/run/utmp", O_RDONLY|O_CLOEXEC) = 4
lseek(4, 0, SEEK_SET)                   = 0
alarm(0)                                = 0
rt_sigaction(SIGALRM, {0x2afd9cdf070, [], SA_RESTORER, 0x2afd9bf5850},
{SIG_DFL, [], SA_RESTORER, 0x2afd9bf5850}, 8) = 0
alarm(10)                               = 0
fcntl(4, F_SETLKW, {type=F_RDLCK, whence=SEEK_SET, start=0, len=0}) = 0
read(4, "\2\0\0\0\0\0\0\0~\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
384) = 384
read(4, "\6\0\0\0P\n\0\0tty1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
384) = 384
read(4, "\10\0\0\0%\23\0\0pts/0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
384) = 384
read(4, "\10\0\0\0E\23\0\0pts/1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
384) = 384
read(4, "\7\0\0\0I\"\0\0pts/2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
384) = 384
fcntl(4, F_SETLKW, {type=F_UNLCK, whence=SEEK_SET, start=0, len=0}) = 0
alarm(0)                                = 10
rt_sigaction(SIGALRM, {SIG_DFL, [], SA_RESTORER, 0x2afd9bf5850}, NULL, 8) = 0
close(4)                                = 0
getuid()                                = 0
sendto(3, "<86>Aug 11 17:42:30 su[8791]: pa"..., 96, MSG_NOSIGNAL, NULL, 0) = 96
clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x2afda58f9d0) = 8793
rt_sigprocmask(SIG_BLOCK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigaction(SIGTERM, {0x403830, [], SA_RESTORER, 0x2afd9bf5850}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [ALRM TERM], NULL, 8) = 0
wait4(-1,

Any ideas what is it waiting on?