ls only on ~/ hangs in state S after wakeup from suspend unless done with strace

[Peter Schüller]

Recently (last 1 month) I encounter the problem that after waking up the computer from sleep mode (suspend to RAM) sometimes the home directory (encrypted) becomes inaccessible to programs.

For example ls ~/ will just hang in S mode.

Attaching an strace to ls from another console does not show anything, not even a started syscall.

Starting ls as root on the problematic home directory also hangs.

The only way I found to undo the hang is a reboot.

dmesg and journalctl does not show anything I could recognize as out-of-the-ordinary.

Starting strace ls as root on the problematic home directory does not hang but return the correct list of files and exits with 0. See the strace below.

/home/ps# strace ls .
execve("/bin/ls", ["ls", "."], 0x7fff47d1b0e8 /* 34 vars */) = 0
brk(NULL) = 0x556ccc4f4000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
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=143444, ...}) = 0
mmap(NULL, 143444, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fed83c38000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libselinux.so.1", 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\20b\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=154832, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fed83c36000
mmap(NULL, 2259152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fed8380d000
mprotect(0x7fed83832000, 2093056, PROT_NONE) = 0
mmap(0x7fed83a31000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x24000) = 0x7fed83a31000
mmap(0x7fed83a33000, 6352, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fed83a33000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
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\260\34\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2030544, ...}) = 0
mmap(NULL, 4131552, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fed8341c000
mprotect(0x7fed83603000, 2097152, PROT_NONE) = 0
mmap(0x7fed83803000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7fed83803000
mmap(0x7fed83809000, 15072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fed83809000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libpcre.so.3", 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 \25\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=464824, ...}) = 0
mmap(NULL, 2560264, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fed831aa000
mprotect(0x7fed8321a000, 2097152, PROT_NONE) = 0
mmap(0x7fed8341a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x70000) = 0x7fed8341a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
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\0P\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14560, ...}) = 0
mmap(NULL, 2109712, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fed82fa6000
mprotect(0x7fed82fa9000, 2093056, PROT_NONE) = 0
mmap(0x7fed831a8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fed831a8000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
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\0000b\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=144976, ...}) = 0
mmap(NULL, 2221184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fed82d87000
mprotect(0x7fed82da1000, 2093056, PROT_NONE) = 0
mmap(0x7fed82fa0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7fed82fa0000
mmap(0x7fed82fa2000, 13440, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fed82fa2000
close(3) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fed83c34000
arch_prctl(ARCH_SET_FS, 0x7fed83c35040) = 0
mprotect(0x7fed83803000, 16384, PROT_READ) = 0
mprotect(0x7fed82fa0000, 4096, PROT_READ) = 0
mprotect(0x7fed831a8000, 4096, PROT_READ) = 0
mprotect(0x7fed8341a000, 4096, PROT_READ) = 0
mprotect(0x7fed83a31000, 4096, PROT_READ) = 0
mprotect(0x556cca737000, 8192, PROT_READ) = 0
mprotect(0x7fed83c5c000, 4096, PROT_READ) = 0
munmap(0x7fed83c38000, 143444) = 0
set_tid_address(0x7fed83c35310) = 14467
set_robust_list(0x7fed83c35320, 24) = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7fed82d8ccb0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7fed82d99890}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7fed82d8cd50, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fed82d99890}, 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
statfs("/sys/fs/selinux", 0x7ffcd3925a20) = -1 ENOENT (No such file or directory)
statfs("/selinux", 0x7ffcd3925a20) = -1 ENOENT (No such file or directory)
brk(NULL) = 0x556ccc4f4000
brk(0x556ccc515000) = 0x556ccc515000
openat(AT_FDCWD, "/proc/filesystems", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tr"..., 1024) = 423
read(3, "", 1024) = 0
close(3) = 0
access("/etc/selinux/config", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=10281936, ...}) = 0
mmap(NULL, 10281936, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fed823b8000
close(3) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TIOCGWINSZ, {ws_row=24, ws_col=80, ws_xpixel=0, ws_ypixel=0}) = 0
stat(".", {st_mode=S_IFDIR|0700, st_size=20480, ...}) = 0
openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=20480, ...}) = 0
getdents(3, /* 99 entries */, 32768) = 3232
getdents(3, /* 0 entries */, 32768) = 0
close(3) = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 2), ...}) = 0
write(1, "_archive.svn Downloads\t\t\t _"..., 49_archive.svn Downloads _oewf _science
) = 49
write(1, "bin\t _epu\t\t\t oewf.code-"..., 50bin _epu oewf.code-workspace _setup
) = 50
write(1, "_xxxxxxx epu-management.cod"..., 65_xxxxxxx epu-management.code-workspace _organisator snap
) = 65
write(1, "Databases.db examples.desktop\t\t"..., 63Databases.db examples.desktop peschue1-s3ql Templates
) = 63
write(1, "debug.txt hex-ai4eu.code-wor"..., 65debug.txt hex-ai4eu.code-workspace pgadmin.log Videos
) = 65
write(1, "Desktop _homepage\t\t\t P"..., 40Desktop _homepage Pictures
) = 40
write(1, "Documents _management\t\t "..., 42Documents _management _xxxxxxxx
) = 42
write(1, "_xxxxxxx Music\t\t\t Publi"..., 34_xxxxxxx Music Public
) = 34
close(1) = 0
close(2) = 0
exit_group(0) = ?
+++ exited with 0 +++

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: coreutils 8.28-1ubuntu1
ProcVersionSignature: Ubuntu 5.0.0-32.34~18.04.2-generic 5.0.21
Uname: Linux 5.0.0-32-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.8
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 31 08:48:09 2019
EcryptfsInUse: Yes
InstallationDate: Installed on 2019-04-06 (207 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
SourcePackage: coreutils
UpgradeStatus: No upgrade log present (probably fresh install)

[Peter Schüller (schueller-p)]

I forgot to mention: when attaching strace to the problematic ls, strace also hangs and cannot be interrupted with CTRL+C - the console is practically dead.