Trying attachment again.

It failed under iPhone 14.5.
Should succeed with Thunderbird/macOS

# ps auxwww | grep chronyd
_chrony     3597  0.0  0.0  18972  3696 ?        S    11:00   0:00 
/usr/sbin/chronyd -F 1 -L 0
_chrony     3598  0.0  0.0  10780  2984 ?        S    11:00   0:00 
/usr/sbin/chronyd -F 1 -L 0
root        4142  0.0  0.0   6180   716 pts/0    S+   12:10   0:00 grep chronyd

# systemctl restart chronyd

# ps auxwww | grep chronyd
root        4156  0.0  0.0   6180   712 pts/0    S+   12:11   0:00 grep chronyd

# systemctl status chronyd
chrony.service - chrony, an NTP client/server
     Loaded: loaded (/lib/systemd/system/chrony.service; enabled; vendor 
preset: enabled)
     Active: failed (Result: signal) since Tue 2021-09-28 12:11:06 EDT; 13s ago
       Docs: man:chronyd(8)
             man:chronyc(1)
             man:chrony.conf(5)
    Process: 4147 ExecStart=/usr/sbin/chronyd $DAEMON_OPTS (code=exited, 
statusm 0/SUCCESS)
   Main PID: 4149 (code=killed, signal=SYS)
        CPU: 36ms

Sep 28 12:11:06 localhost chronyd[4149]: chronyd version 4.0 starting (+CMDMON 
+NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +NTS +SECHASH +IPV6 
-DEBUG)
Sep 28 12:11:06 localhost systemd[1]: chrony.service: Succeeded.
Sep 28 12:11:06 localhost chronyd[4149]: Frequency -3.305 +/- 0.025 ppm read 
from /v ar/lib/chrony/chrony.drift
Sep 28 12:11:06 localhost systemd[1]: Stopped chrony, an NTP client/server.
Sep 28 12:11:06 localhost chronyd[4149]: Using right/UTC timezone to obtain 
leap second data
Sep 28 12:11:06 localhost systemd[1]: Starting chrony, an NTP client/server...
Sep 28 12:11:06 localhost chronyd[4149]: Loaded seccomp filter
Sep 28 12:11:06 localhost systemd[1]: Started chrony, an NTP client/server.
Sep 28 12:11:06 localhost systemd[1]: 
    chrony.service: Main process exited, code=kill
    lines 1-19, status=31/SYS
    lines 2-19 12:11:06 localhost systemd[1]: mchrony.service: Failed with 
result 'signal'.
    lines 2-20 lines 2-20/20 (END)
    lines 2-20/20 (END)
    lines 2-20/20 (END)
# 
# # maintainer request
# strace -o chronyd_debug.txt chronyd -d -F 1
chronyd version 4.0 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER 
+SIGND +ASYNCDNS +NTS +SECHASH +IPV6 -DEBUG)
2021-09-28T16:12:06Z Frequency -3.305 +/- 0.025 ppm read from 
/var/lib/chrony/chrony.drift
2021-09-28T16:12:06Z Using right/UTC timezone to obtain leap second data
2021-09-28T16:12:06Z Loaded seccomp filter
Bad system call
# cat chronyd_debug.txt
execve("/usr/sbin/chronyd", ["chronyd", "-d", "-F", "1"], 0x7ffecfacd628 /* 18 
vars */) = 0
brk(NULL)                               = 0x55a4c537d000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=45532, ...}) = 0
mmap(NULL, 45532, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f84986a7000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\362\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=1321344, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x7f84986a5000
mmap(NULL, 1323280, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8498561000
mmap(0x7f8498570000, 630784, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0x7f8498570000
mmap(0x7f849860a000, 626688, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0xa9000) = 0x7f849860a000
mmap(0x7f84986a3000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x141000) = 0x7f84986a3000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libnettle.so.8", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\314\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=290416, ...}) = 0
mmap(NULL, 292416, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8498519000
mprotect(0x7f8498525000, 233472, PROT_NONE) = 0
mmap(0x7f8498525000, 139264, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xc000) = 0x7f8498525000
mmap(0x7f8498547000, 90112, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x2e000) = 0x7f8498547000
mmap(0x7f849855e000, 12288, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x44000) = 0x7f849855e000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libgnutls.so.30", O_RDONLY|O_CLOEXEC) = 
3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@y\3\0\0\0\0\0"..., 832) 
= 832
fstat(3, {st_mode=S_IFREG|0644, st_size=2086552, ...}) = 0
mmap(NULL, 2094888, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8498319000
mmap(0x7f849834d000, 1183744, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x34000) = 0x7f849834d000
mmap(0x7f849846e000, 614400, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x155000) = 0x7f849846e000
mmap(0x7f8498504000, 77824, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ea000) = 0x7f8498504000
mmap(0x7f8498517000, 5928, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f8498517000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libcap.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\3203\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=38864, ...}) = 0
mmap(NULL, 41016, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f849830e000
mmap(0x7f8498311000, 16384, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f8498311000
mmap(0x7f8498315000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x7000) = 0x7f8498315000
mmap(0x7f8498317000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0x7f8498317000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libseccomp.so.2", O_RDONLY|O_CLOEXEC) = 
3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360!\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=137536, ...}) = 0
mmap(NULL, 139648, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f84982eb000
mmap(0x7f84982ed000, 65536, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f84982ed000
mmap(0x7f84982fd000, 61440, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x12000) = 0x7f84982fd000
mmap(0x7f849830c000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x20000) = 0x7f849830c000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 
3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 |\0\0\0\0\0\0"..., 832) 
= 832
fstat(3, {st_mode=S_IFREG|0755, st_size=149520, ...}) = 0
mmap(NULL, 136304, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f84982c9000
mmap(0x7f84982d0000, 65536, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7f84982d0000
mmap(0x7f84982e0000, 20480, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x17000) = 0x7f84982e0000
mmap(0x7f84982e5000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b000) = 0x7f84982e5000
mmap(0x7f84982e7000, 13424, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f84982e7000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@n\2\0\0\0\0\0"..., 832) 
= 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1839792, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x7f84982c7000
mmap(NULL, 1852680, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8498102000
mprotect(0x7f8498127000, 1662976, PROT_NONE) = 0
mmap(0x7f8498127000, 1355776, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x25000) = 0x7f8498127000
mmap(0x7f8498272000, 303104, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x170000) = 0x7f8498272000
mmap(0x7f84982bd000, 24576, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ba000) = 0x7f84982bd000
mmap(0x7f84982c3000, 13576, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f84982c3000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libp11-kit.so.0", O_RDONLY|O_CLOEXEC) = 
3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\270\2\0\0\0\0\0"..., 832) = 
832
fstat(3, {st_mode=S_IFREG|0644, st_size=1257280, ...}) = 0
mmap(NULL, 1260800, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8497fce000
mmap(0x7f8497ff9000, 622592, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2b000) = 0x7f8497ff9000
mmap(0x7f8498091000, 376832, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0xc3000) = 0x7f8498091000
mmap(0x7f84980ed000, 86016, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x11e000) = 0x7f84980ed000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libidn2.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\"\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=128944, ...}) = 0
mmap(NULL, 131096, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8497fad000
mmap(0x7f8497faf000, 16384, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f8497faf000
mmap(0x7f8497fb3000, 102400, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x6000) = 0x7f8497fb3000
mmap(0x7f8497fcc000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e000) = 0x7f8497fcc000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libunistring.so.2", O_RDONLY|O_CLOEXEC) 
= 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300 \1\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=1574952, ...}) = 0
mmap(NULL, 1579272, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8497e2b000
mmap(0x7f8497e3c000, 217088, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x11000) = 0x7f8497e3c000
mmap(0x7f8497e71000, 1273856, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 
3, 0x46000) = 0x7f8497e71000
mmap(0x7f8497fa8000, 20480, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x17c000) = 0x7f8497fa8000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libtasn1.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\2203\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=83968, ...}) = 0
mmap(NULL, 86568, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8497e15000
mprotect(0x7f8497e18000, 69632, PROT_NONE) = 0
mmap(0x7f8497e18000, 49152, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f8497e18000
mmap(0x7f8497e24000, 16384, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0xf000) = 0x7f8497e24000
mmap(0x7f8497e29000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13000) = 0x7f8497e29000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libhogweed.so.6", O_RDONLY|O_CLOEXEC) = 
3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\236\0\0\0\0\0\0"..., 832) = 
832
fstat(3, {st_mode=S_IFREG|0644, st_size=294832, ...}) = 0
mmap(NULL, 296832, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8497dcc000
mprotect(0x7f8497dd5000, 253952, PROT_NONE) = 0
mmap(0x7f8497dd5000, 77824, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x9000) = 0x7f8497dd5000
mmap(0x7f8497de8000, 172032, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x1c000) = 0x7f8497de8000
mmap(0x7f8497e13000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x46000) = 0x7f8497e13000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libgmp.so.10", O_RDONLY|O_CLOEXEC) = 3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\306\0\0\0\0\0\0"..., 832) = 
832
fstat(3, {st_mode=S_IFREG|0644, st_size=525152, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x7f8497dca000
mmap(NULL, 527304, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8497d49000
mprotect(0x7f8497d54000, 475136, PROT_NONE) = 0
mmap(0x7f8497d54000, 376832, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xb000) = 0x7f8497d54000
mmap(0x7f8497db0000, 94208, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x67000) = 0x7f8497db0000
mmap(0x7f8497dc8000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7e000) = 0x7f8497dc8000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libffi.so.7", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\"\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=43496, ...}) = 0
mmap(NULL, 46728, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8497d3d000
mmap(0x7f8497d3f000, 24576, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f8497d3f000
mmap(0x7f8497d45000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x8000) = 0x7f8497d45000
mmap(0x7f8497d47000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x9000) = 0x7f8497d47000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000\21\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=18688, ...}) = 0
mmap(NULL, 20752, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8497d37000
mmap(0x7f8497d38000, 8192, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0x7f8497d38000
mmap(0x7f8497d3a000, 4096, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0x3000) = 0x7f8497d3a000
mmap(0x7f8497d3b000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f8497d3b000
close(3)                                = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x7f8497d35000
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x7f8497d32000
arch_prctl(ARCH_SET_FS, 0x7f8497d32940) = 0
mprotect(0x7f84982bd000, 12288, PROT_READ) = 0
mprotect(0x7f8497d3b000, 4096, PROT_READ) = 0
mprotect(0x7f8497d47000, 4096, PROT_READ) = 0
mprotect(0x7f8497dc8000, 4096, PROT_READ) = 0
mprotect(0x7f849855e000, 8192, PROT_READ) = 0
mprotect(0x7f8497e13000, 4096, PROT_READ) = 0
mprotect(0x7f8497e29000, 4096, PROT_READ) = 0
mprotect(0x7f8497fa8000, 16384, PROT_READ) = 0
mprotect(0x7f8497fcc000, 4096, PROT_READ) = 0
mprotect(0x7f84982e5000, 4096, PROT_READ) = 0
mprotect(0x7f84980ed000, 45056, PROT_READ) = 0
mprotect(0x7f849830c000, 4096, PROT_READ) = 0
mprotect(0x7f8498317000, 4096, PROT_READ) = 0
mprotect(0x7f8498504000, 69632, PROT_READ) = 0
mprotect(0x7f84986a3000, 4096, PROT_READ) = 0
mprotect(0x55a4c44b0000, 4096, PROT_READ) = 0
mprotect(0x7f84986dd000, 4096, PROT_READ) = 0
munmap(0x7f84986a7000, 45532)           = 0
set_tid_address(0x7f8497d32c10)         = 4163
set_robust_list(0x7f8497d32c20, 24)     = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7f84982d0690, sa_mask=[], 
sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f84982dd140}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7f84982d0730, sa_mask=[], 
sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f84982dd140}, NULL, 
8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, 
rlim_max=RLIM64_INFINITY}) = 0
brk(NULL)                               = 0x55a4c537d000
brk(0x55a4c539e000)                     = 0x55a4c539e000
prctl(PR_CAPBSET_READ, CAP_MAC_OVERRIDE) = 1
prctl(PR_CAPBSET_READ, 0x30 /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, CAP_CHECKPOINT_RESTORE) = 1
prctl(PR_CAPBSET_READ, 0x2c /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x2a /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x29 /* CAP_??? */) = -1 EINVAL (Invalid argument)
getrandom("\x78", 1, GRND_NONBLOCK)     = 1
stat("/etc/gnutls/config", 0x7ffe6ce272d0) = -1 ENOENT (No such file or 
directory)
getuid()                                = 0
openat(AT_FDCWD, "/etc/localtime", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=3536, ...}) = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=3536, ...}) = 0
read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\5\0\0\0\5\0\0\0\0"..., 4096) 
= 3536
lseek(3, -2252, SEEK_CUR)               = 1284
read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\5\0\0\0\5\0\0\0\0"..., 4096) 
= 2252
close(3)                                = 0
fstat(2, {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0), ...}) = 0
write(2, "2021-09-28T16:12:06Z chronyd ver"..., 144) = 144
openat(AT_FDCWD, "/etc/chrony/chrony.conf", O_RDONLY) = 3
fcntl(3, F_GETFD)                       = 0
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
fcntl(3, F_GETFL)                       = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fstat(3, {st_mode=S_IFREG|0644, st_size=1419, ...}) = 0
read(3, "# Welcome to the chrony configur"..., 4096) = 1419
openat(AT_FDCWD, "/etc/chrony/conf.d", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
brk(0x55a4c53c4000)                     = 0x55a4c53c4000
getdents64(4, 0x55a4c539bcf0 /* 5 entries */, 32768) = 160
getdents64(4, 0x55a4c539bcf0 /* 0 entries */, 32768) = 0
brk(0x55a4c53bc000)                     = 0x55a4c53bc000
close(4)                                = 0
openat(AT_FDCWD, "/etc/chrony/conf.d/05-bindacqaddress.conf", O_RDONLY) = 4
fcntl(4, F_GETFD)                       = 0
fcntl(4, F_SETFD, FD_CLOEXEC)           = 0
fcntl(4, F_GETFL)                       = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fstat(4, {st_mode=S_IFREG|0644, st_size=23, ...}) = 0
read(4, "\n\nbindacqdevice enp5s0\n", 4096) = 23
read(4, "", 4096)                       = 0
close(4)                                = 0
read(3, "", 4096)                       = 0
close(3)                                = 0
brk(0x55a4c53bb000)                     = 0x55a4c53bb000
openat(AT_FDCWD, "/run/chrony/chronyd.pid", O_RDONLY) = -1 ENOENT (No such file 
or directory)
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 
ENOENT (No such file or directory)
close(3)                                = 0
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 
ENOENT (No such file or directory)
close(3)                                = 0
openat(AT_FDCWD, "/etc/nsswitch.conf", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=510, ...}) = 0
read(3, "# /etc/nsswitch.conf\n#\n# Example"..., 4096) = 510
read(3, "", 4096)                       = 0
close(3)                                = 0
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=45532, ...}) = 0
mmap(NULL, 45532, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f84986a7000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libnss_files.so.2", O_RDONLY|O_CLOEXEC) 
= 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0003\0\0\0\0\0\0"..., 
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=51696, ...}) = 0
mmap(NULL, 79672, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8497d1e000
mmap(0x7f8497d21000, 28672, PROT_READ|PROT_EXEC, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f8497d21000
mmap(0x7f8497d28000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 
0xa000) = 0x7f8497d28000
mmap(0x7f8497d2a000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xb000) = 0x7f8497d2a000
mmap(0x7f8497d2c000, 22328, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f8497d2c000
close(3)                                = 0
mprotect(0x7f8497d2a000, 4096, PROT_READ) = 0
munmap(0x7f84986a7000, 45532)           = 0
openat(AT_FDCWD, "/etc/passwd", O_RDONLY|O_CLOEXEC) = 3
lseek(3, 0, SEEK_CUR)                   = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=1669, ...}) = 0
read(3, "root:x:0:0:root:/root:/bin/bash\n"..., 4096) = 1669
close(3)                                = 0
stat("/run", {st_mode=S_IFDIR|0755, st_size=840, ...}) = 0
stat("/run/chrony", {st_mode=S_IFDIR|0750, st_size=60, ...}) = 0
stat("/run/chrony", {st_mode=S_IFDIR|0750, st_size=60, ...}) = 0
stat("/var", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/var/lib", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/var/lib/chrony", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
openat(AT_FDCWD, "/run/chrony/chronyd.pid", O_WRONLY|O_CREAT|O_EXCL, 0644) = 3
fcntl(3, F_GETFD)                       = 0
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
fcntl(3, F_GETFL)                       = 0x8001 (flags O_WRONLY|O_LARGEFILE)
getpid()                                = 4163
fstat(3, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
write(3, "4163\n", 5)                   = 5
close(3)                                = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC, IPPROTO_IP) = 3
fcntl(3, F_GETFD)                       = 0x1 (flags FD_CLOEXEC)
fcntl(3, F_GETFL)                       = 0x2 (flags O_RDWR)
close(3)                                = 0
socket(AF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 3
fcntl(3, F_GETFD)                       = 0
fcntl(3, F_GETFL)                       = 0x802 (flags O_RDWR|O_NONBLOCK)
close(3)                                = 0
uname({sysname="Linux", nodename="localhost", ...}) = 0
prctl(PR_CAPBSET_READ, CAP_SYS_TIME)    = 1
prctl(PR_CAPBSET_READ, CAP_SYS_TIME)    = 1
clock_adjtime(CLOCK_REALTIME, {modes=ADJ_OFFSET_SINGLESHOT, offset=0, 
freq=216566, maxerror=16000000, esterror=16000000, status=STA_UNSYNC, 
constant=2, precision=1, tolerance=32768000, time={tv_sec=1632845526, 
tv_usec=403202}, tick=10000, ppsfreq=0, jitter=0, shift=0, stabil=0, jitcnt=0, 
calcnt=0, errcnt=0, stbcnt=0, tai=37}) = 5 (TIME_ERROR)
clock_adjtime(CLOCK_REALTIME, {modes=ADJ_MAXERROR, offset=0, freq=216566, 
maxerror=0, esterror=16000000, status=STA_UNSYNC, constant=2, precision=1, 
tolerance=32768000, time={tv_sec=1632845526, tv_usec=403246}, tick=10000, 
ppsfreq=0, jitter=0, shift=0, stabil=0, jitcnt=0, calcnt=0, errcnt=0, stbcnt=0, 
tai=37}) = 5 (TIME_ERROR)
clock_adjtime(CLOCK_REALTIME, {modes=ADJ_SETOFFSET|ADJ_NANO, offset=0, 
freq=216566, maxerror=16000000, esterror=16000000, status=STA_UNSYNC|STA_NANO, 
constant=2, precision=1, tolerance=32768000, time={tv_sec=1632845526, 
tv_usec=403311208}, tick=10000, ppsfreq=0, jitter=0, shift=0, stabil=0, 
jitcnt=0, calcnt=0, errcnt=0, stbcnt=0, tai=37}) = 5 (TIME_ERROR)
clock_adjtime(CLOCK_REALTIME, {modes=ADJ_OFFSET|ADJ_STATUS, offset=0, 
freq=216566, maxerror=16000000, esterror=16000000, 
status=STA_PLL|STA_UNSYNC|STA_NANO, constant=2, precision=1, 
tolerance=32768000, time={tv_sec=1632845526, tv_usec=403376715}, tick=10000, 
ppsfreq=0, jitter=0, shift=0, stabil=0, jitcnt=0, calcnt=0, errcnt=0, stbcnt=0, 
tai=37}) = 5 (TIME_ERROR)
clock_adjtime(CLOCK_REALTIME, {modes=ADJ_STATUS, offset=0, freq=216566, 
maxerror=16000000, esterror=16000000, status=STA_UNSYNC, constant=2, 
precision=1, tolerance=32768000, time={tv_sec=1632845526, tv_usec=403434}, 
tick=10000, ppsfreq=0, jitter=0, shift=0, stabil=0, jitcnt=0, calcnt=0, 
errcnt=0, stbcnt=0, tai=37}) = 5 (TIME_ERROR)
clock_adjtime(CLOCK_REALTIME, {modes=0, offset=0, freq=216566, 
maxerror=16000000, esterror=16000000, status=STA_UNSYNC, constant=2, 
precision=1, tolerance=32768000, time={tv_sec=1632845526, tv_usec=403474}, 
tick=10000, ppsfreq=0, jitter=0, shift=0, stabil=0, jitcnt=0, calcnt=0, 
errcnt=0, stbcnt=0, tai=37}) = 5 (TIME_ERROR)
openat(AT_FDCWD, "/etc/chrony/chrony.keys", O_RDONLY) = 3
fcntl(3, F_GETFD)                       = 0
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
fcntl(3, F_GETFL)                       = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fstat(3, {st_mode=S_IFREG|0640, st_size=481, ...}) = 0
read(3, "# This file is solely used for N"..., 4096) = 481
read(3, "", 4096)                       = 0
close(3)                                = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 3
setsockopt(3, SOL_IP, IP_PKTINFO, [1], 4) = 0
setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
setsockopt(3, SOL_SOCKET, SO_REUSEPORT, [1], 4) = 0
setsockopt(3, SOL_IP, IP_FREEBIND, [1], 4) = 0
bind(3, {sa_family=AF_INET, sin_port=htons(323), 
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 4
setsockopt(4, SOL_IPV6, IPV6_V6ONLY, [1], 4) = 0
setsockopt(4, SOL_IPV6, IPV6_RECVPKTINFO, [1], 4) = 0
setsockopt(4, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
setsockopt(4, SOL_SOCKET, SO_REUSEPORT, [1], 4) = 0
setsockopt(4, SOL_IP, IP_FREEBIND, [1], 4) = 0
bind(4, {sa_family=AF_INET6, sin6_port=htons(323), sin6_flowinfo=htonl(0), 
inet_pton(AF_INET6, "::1", &sin6_addr), sin6_scope_id=0}, 28) = 0
uname({sysname="Linux", nodename="localhost", ...}) = 0
geteuid()                               = 0
prctl(PR_SET_KEEPCAPS, 1)               = 0
setgroups(0, NULL)                      = 0
setgid(115)                             = 0
setuid(107)                             = 0
uname({sysname="Linux", nodename="localhost", ...}) = 0
capget({version=_LINUX_CAPABILITY_VERSION_3, pid=0}, NULL) = 0
capset({version=_LINUX_CAPABILITY_VERSION_3, pid=0}, 
{effective=1<<CAP_NET_BIND_SERVICE|1<<CAP_SYS_TIME, 
permitted=1<<CAP_NET_BIND_SERVICE|1<<CAP_SYS_TIME, inheritable=0}) = 0
openat(AT_FDCWD, "/var/lib/chrony/chrony.drift", O_RDONLY) = 5
fcntl(5, F_GETFD)                       = 0
fcntl(5, F_SETFD, FD_CLOEXEC)           = 0
fcntl(5, F_GETFL)                       = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fstat(5, {st_mode=S_IFREG|0644, st_size=42, ...}) = 0
read(5, "           -3.304549            "..., 4096) = 42
write(2, "2021-09-28T16:12:06Z Frequency -"..., 91) = 91
clock_adjtime(CLOCK_REALTIME, {modes=ADJ_FREQUENCY|ADJ_TICK, offset=0, 
freq=216566, maxerror=16000000, esterror=16000000, status=STA_UNSYNC, 
constant=2, precision=1, tolerance=32768000, time={tv_sec=1632845526, 
tv_usec=405269}, tick=10000, ppsfreq=0, jitter=0, shift=0, stabil=0, jitcnt=0, 
calcnt=0, errcnt=0, stbcnt=0, tai=37}) = 5 (TIME_ERROR)
close(5)                                = 0
stat("/usr/share/zoneinfo/right/UTC", {st_mode=S_IFREG|0644, st_size=658, ...}) 
= 0
openat(AT_FDCWD, "/usr/share/zoneinfo/right/UTC", O_RDONLY|O_CLOEXEC) = 5
fstat(5, {st_mode=S_IFREG|0644, st_size=658, ...}) = 0
fstat(5, {st_mode=S_IFREG|0644, st_size=658, ...}) = 0
read(5, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\33"..., 
4096) = 658
lseek(5, -386, SEEK_CUR)                = 272
read(5, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\33"..., 
4096) = 386
close(5)                                = 0
stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=3536, ...}) = 0
openat(AT_FDCWD, "/etc/localtime", O_RDONLY|O_CLOEXEC) = 5
fstat(5, {st_mode=S_IFREG|0644, st_size=3536, ...}) = 0
fstat(5, {st_mode=S_IFREG|0644, st_size=3536, ...}) = 0
read(5, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\5\0\0\0\5\0\0\0\0"..., 4096) 
= 3536
lseek(5, -2252, SEEK_CUR)               = 1284
read(5, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\5\0\0\0\5\0\0\0\0"..., 4096) 
= 2252
close(5)                                = 0
stat("/usr/share/zoneinfo/right/UTC", {st_mode=S_IFREG|0644, st_size=658, ...}) 
= 0
openat(AT_FDCWD, "/usr/share/zoneinfo/right/UTC", O_RDONLY|O_CLOEXEC) = 5
fstat(5, {st_mode=S_IFREG|0644, st_size=658, ...}) = 0
fstat(5, {st_mode=S_IFREG|0644, st_size=658, ...}) = 0
read(5, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\33"..., 
4096) = 658
lseek(5, -386, SEEK_CUR)                = 272
read(5, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\33"..., 
4096) = 386
close(5)                                = 0
stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=3536, ...}) = 0
openat(AT_FDCWD, "/etc/localtime", O_RDONLY|O_CLOEXEC) = 5
fstat(5, {st_mode=S_IFREG|0644, st_size=3536, ...}) = 0
fstat(5, {st_mode=S_IFREG|0644, st_size=3536, ...}) = 0
read(5, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\5\0\0\0\5\0\0\0\0"..., 4096) 
= 3536
lseek(5, -2252, SEEK_CUR)               = 1284
read(5, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\5\0\0\0\5\0\0\0\0"..., 4096) 
= 2252
close(5)                                = 0
write(2, "2021-09-28T16:12:06Z Using right"..., 73) = 73
clock_adjtime(CLOCK_REALTIME, {modes=ADJ_MAXERROR|ADJ_ESTERROR|ADJ_STATUS, 
offset=0, freq=216566, maxerror=16000000, esterror=16000000, status=STA_UNSYNC, 
constant=2, precision=1, tolerance=32768000, time={tv_sec=1632845526, 
tv_usec=407252}, tick=10000, ppsfreq=0, jitter=0, shift=0, stabil=0, jitcnt=0, 
calcnt=0, errcnt=0, stbcnt=0, tai=37}) = 5 (TIME_ERROR)
getrandom("\x1b\x5e\xea\x26\xa2\x76\xc8\x39\x9b\xe8\x09\x93\x8e\xe8\x63\xff\xbd\x7e\x96\xba\x45\xbf\xc7\x06\x6c\xbe\x51\x08\x4f\xc9\xd7\x59"...,
 256, GRND_NONBLOCK) = 256
rt_sigaction(SIGINT, {sa_handler=0x55a4c4475c60, sa_mask=[], 
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f84982dd140}, NULL, 8) = 0
rt_sigaction(SIGTERM, {sa_handler=0x55a4c4475c60, sa_mask=[], 
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f84982dd140}, NULL, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=0x55a4c4475c60, sa_mask=[], 
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f84982dd140}, NULL, 8) = 0
rt_sigaction(SIGHUP, {sa_handler=0x55a4c4475c60, sa_mask=[], 
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f84982dd140}, NULL, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], 
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f84982dd140}, NULL, 8) = 0
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 5
unlink("/run/chrony/chronyd.sock")      = 0
bind(5, {sa_family=AF_UNIX, sun_path="/run/chrony/chronyd.sock"}, 110) = 0
socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, [6, 7]) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, 
child_tidptr=0x7f8497d32c10) = 4164
close(7)                                = 0
seccomp(SECCOMP_SET_MODE_STRICT, 1, NULL) = -1 EINVAL (Invalid argument)
seccomp(SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_TSYNC, NULL) = -1 EFAULT 
(Bad address)
seccomp(SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_LOG, NULL) = -1 EFAULT 
(Bad address)
seccomp(SECCOMP_GET_ACTION_AVAIL, 0, [SECCOMP_RET_LOG]) = 0
seccomp(SECCOMP_GET_ACTION_AVAIL, 0, [SECCOMP_RET_KILL_PROCESS]) = 0
seccomp(SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_SPEC_ALLOW, NULL) = -1 
EFAULT (Bad address)
seccomp(SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_NEW_LISTENER, NULL) = -1 
EFAULT (Bad address)
seccomp(SECCOMP_GET_NOTIF_SIZES, 0, 0x7ffe6ce27062) = 0
seccomp(SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_TSYNC_ESRCH, NULL) = -1 
EFAULT (Bad address)
brk(0x55a4c53dc000)                     = 0x55a4c53dc000
prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0)  = 0
seccomp(SECCOMP_SET_MODE_FILTER, 0, {len=219, filter=0x55a4c53c8ed0}) = 0
write(2, "2021-09-28T16:12:06Z Loaded secc"..., 43) = 43
openat(AT_FDCWD, "/run/chrony-dhcp", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) 
= 7
fstat(7, {st_mode=S_IFDIR|0755, st_size=60, ...}) = 0
getdents64(7, 0x55a4c53a4a30 /* 3 entries */, 32768) = 88
getdents64(7, 0x55a4c53a4a30 /* 0 entries */, 32768) = 0
close(7)                                = 0
openat(AT_FDCWD, "/run/chrony-dhcp/enp5s0.sources", O_RDONLY) = 7
fcntl(7, F_GETFD)                       = 0
fcntl(7, F_SETFD, FD_CLOEXEC)           = 0
fcntl(7, F_GETFL)                       = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fstat(7, {st_mode=S_IFREG|0644, st_size=27, ...}) = 0
read(7, "server 172.28.130.1 iburst\n", 4096) = 27
read(7, "", 4096)                       = 0
close(7)                                = 0
openat(AT_FDCWD, "/etc/chrony/sources.d", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 7
fstat(7, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
getdents64(7, 0x55a4c53a4a30 /* 3 entries */, 32768) = 80
getdents64(7, 0x55a4c53a4a30 /* 0 entries */, 32768) = 0
close(7)                                = 0
sendmsg(6, {msg_name=NULL, msg_namelen=0, 
msg_iov=[{iov_base="\5\4\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"...,
 iov_len=264}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 264
recvfrom(6, 
"\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\0\0"..., 336, 0, 
NULL, NULL) = 336
pipe([7, 8])                            = 0
fcntl(7, F_GETFD)                       = 0
fcntl(7, F_SETFD, FD_CLOEXEC)           = 0
fcntl(8, F_GETFD)                       = 0
fcntl(8, F_SETFD, FD_CLOEXEC)           = 0
mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 
0x7f849751d000
mprotect(0x7f849751e000, 8388608, PROT_READ|PROT_WRITE) = 0
clone(child_stack=0x7f8497d1cdb0, 
flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID,
 parent_tid=[4165], tls=0x7f8497d1d700, child_tidptr=0x7f8497d1d9d0) = 4165
select(8, [3 4 5 7], NULL, NULL, {tv_sec=9999, tv_usec=992985}) = 1 (in [7], 
left {tv_sec=9999, tv_usec=990742})
close(7)                                = 0
close(8)                                = 0
socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 7
setsockopt(7, SOL_IP, IP_PKTINFO, [1], 4) = 0
setsockopt(7, SOL_SOCKET, SO_BINDTODEVICE, "enp5s0\0", 7) = ?
+++ killed by SIGSYS +++

# exit  # 'script' terminal capture command

Summary:

I noticed it opened my lone drop-in config containing the 'bindacqdevice 
enp5s0' statement:

    openat(AT_FDCWD, "/etc/chrony/conf.d/05-bindacqaddress.conf", O_RDONLY) = 4

and read the directive:

    read(4, "\n\nbindacqdevice enp5s0\n", 4096) = 23

then it failed at the socket binding time:

    socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 7
    setsockopt(7, SOL_IP, IP_PKTINFO, [1], 4) = 0
    setsockopt(7, SOL_SOCKET, SO_BINDTODEVICE, "enp5s0\0", 7) = ?


------------------
On a unrelated note (Debian #995260 bug), it opened a UNIX socket without a PID 
value in its filename:

    socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 5
    unlink("/run/chrony/chronyd.sock")      = 0
    bind(5, {sa_family=AF_UNIX, sun_path="/run/chrony/chronyd.sock"}, 110) = 0

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