* bug#35662: Really relocatable binaries crash with Permission denied
@ 2019-05-09 22:01 pelzflorian (Florian Pelz)
2019-05-10 5:54 ` pelzflorian (Florian Pelz)
2019-05-10 21:50 ` Ludovic Courtès
0 siblings, 2 replies; 17+ messages in thread
From: pelzflorian (Florian Pelz) @ 2019-05-09 22:01 UTC (permalink / raw)
To: 35662
The manual gives the following example of guix pack -RR:
guix pack -RR -S /mybin=bin bash
tar xf pack.tar.gz
./mybin/sh
This fails on my university’s server for students which uses Linux
container “VMs” with Ubuntu and has no user namespace support and Guix
is not installed. This single line is all output:
$ ./mybin/sh
sh: run.c:162: bind_mount: Unexpected error: Permission denied.
Note that
PROOT_NO_SECCOMP=1 ~/gnu/store/iyd2ikxadcp89j5919pwja6swnx00493-proot-static-5.1.0/bin/proot -w $(pwd | sed 's/${HOME}//') -r ${HOME} -b /proc /mybin/sh
works just fine (inspired by
<https://guix-hpc.bordeaux.inria.fr/blog/2017/10/using-guix-without-being-root/>).
For testing purposes, I compile the wrapper
gnu/packages/aux-files/run-in-namespace.c:
sed -i 's|@STORE_DIRECTORY@|/gnu/store|g' run-in-namespace.c
sed -i 's|@WRAPPED_PROGRAM@|/mybin/sh|g' run-in-namespace.c
gcc -std=gnu99 -static -O0 -g -Wall run-in-namespace.c
scp run-in-namespace.c a.out … # upload it to the university server
ssh …
gdb a.out
[…]
(gdb) break main
Breakpoint 1 at 0x401ea1: file run-in-namespace.c, line 260.
(gdb) run
Starting program: /home/f_pelz12/a.out
Breakpoint 1, main (argc=1, argv=0x7fffffffe818) at run-in-namespace.c:260
260 size = readlink ("/proc/self/exe", self, sizeof self - 1);
(gdb) next
261 assert (size > 0);
(gdb)
265 size_t index = strlen (self)
(gdb)
268 char *store = strdup (self);
(gdb)
269 store[index] = '\0';
(gdb)
277 if (strcmp (store, "/gnu/store") != 0
(gdb)
278 && lstat ("/mybin/sh", &statbuf) != 0)
(gdb)
283 char *new_root = mkdtemp (strdup ("/tmp/guix-exec-XXXXXX"));
(gdb)
284 char *new_store = concat (new_root, "/gnu/store");
(gdb)
285 char *cwd = get_current_dir_name ();
(gdb)
292 pid_t child = syscall (SYS_clone, SIGCHLD | CLONE_NEWNS | CLONE_NEWUSER,
(gdb)
[Detaching after fork from child process 12748]
294 switch (child)
(gdb) a.out: run-in-namespace.c:162: bind_mount: Unexpected error: Permission denied.
337 disallow_setgroups (child);
(gdb)
a.out: run-in-namespace.c:205: disallow_setgroups: Unexpected error: Permission denied.
Program received signal SIGABRT, Aborted.
0x000000000040796f in raise ()
I do not know how to break into the detached child’s bind_mount call,
so I am unable to give details on this bind_mount error (I do not know
if the bind_mount really is the cause of the crash; it is futile
anyway and the binary should just try proot after all and not crash
before). A breakpoint from `break bind_mount` is ignored. Can I get
more information out of this somehow?
For completeness:
$ uname -a
Linux tux6 4.15.18-14-pve #1 SMP PVE 4.15.18-38 (Tue, 30 Apr 2019 10:51:33 +0200) x86_64 x86_64 x86_64 GNU/Linux
Regards,
Florian
^ permalink raw reply [flat|nested] 17+ messages in thread* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-09 22:01 bug#35662: Really relocatable binaries crash with Permission denied pelzflorian (Florian Pelz) @ 2019-05-10 5:54 ` pelzflorian (Florian Pelz) 2019-05-10 21:50 ` Ludovic Courtès 1 sibling, 0 replies; 17+ messages in thread From: pelzflorian (Florian Pelz) @ 2019-05-10 5:54 UTC (permalink / raw) To: 35662 On Fri, May 10, 2019 at 12:01:36AM +0200, pelzflorian (Florian Pelz) wrote: > sed -i 's|@STORE_DIRECTORY@|/gnu/store|g' run-in-namespace.c > sed -i 's|@WRAPPED_PROGRAM@|/mybin/sh|g' run-in-namespace.c > gcc -std=gnu99 -static -O0 -g -Wall run-in-namespace.c I think it should have been sed -i 's|@STORE_DIRECTORY@|/gnu/store|g' run-in-namespace.c sed -i 's|@WRAPPED_PROGRAM@|/gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/sh|g' run-in-namespace.c echo '#define PROOT_PROGRAM "iyd2ikxadcp89j5919pwja6swnx00493-proot-static-5.1.0/bin/proot"' > new cat run-in-namespace.c >> new mv new run-in-namespace.c gcc -std=gnu99 -static -O0 -g -Wall run-in-namespace.c but it does not make a difference to the gdb output except the line > 278 && lstat ("/mybin/sh", &statbuf) != 0) Regards, Florian ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-09 22:01 bug#35662: Really relocatable binaries crash with Permission denied pelzflorian (Florian Pelz) 2019-05-10 5:54 ` pelzflorian (Florian Pelz) @ 2019-05-10 21:50 ` Ludovic Courtès 2019-05-11 5:05 ` pelzflorian (Florian Pelz) 1 sibling, 1 reply; 17+ messages in thread From: Ludovic Courtès @ 2019-05-10 21:50 UTC (permalink / raw) To: pelzflorian (Florian Pelz); +Cc: 35662 Hello, "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: > The manual gives the following example of guix pack -RR: > > guix pack -RR -S /mybin=bin bash > tar xf pack.tar.gz > ./mybin/sh > > This fails on my university’s server for students which uses Linux > container “VMs” with Ubuntu and has no user namespace support and Guix > is not installed. This single line is all output: > > $ ./mybin/sh > sh: run.c:162: bind_mount: Unexpected error: Permission denied. That suggests the wrapper chose the user namespace method (not PRoot), but that didn’t quite work. Could you post the output of: strace ./mybin/sh ? TIA! Ludo’. ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-10 21:50 ` Ludovic Courtès @ 2019-05-11 5:05 ` pelzflorian (Florian Pelz) 2019-05-13 7:49 ` Ludovic Courtès 0 siblings, 1 reply; 17+ messages in thread From: pelzflorian (Florian Pelz) @ 2019-05-11 5:05 UTC (permalink / raw) To: Ludovic Courtès; +Cc: 35662 On Fri, May 10, 2019 at 11:50:19PM +0200, Ludovic Courtès wrote: > That suggests the wrapper chose the user namespace method (not PRoot), > but that didn’t quite work. > > Could you post the output of: > > strace ./mybin/sh > > ? > [f_pelz12@tux6 ~]$ strace ./mybin/sh execve("./mybin/sh", ["./mybin/sh"], 0x7fffcdf87290 /* 39 vars */) = 0 brk(NULL) = 0x2301000 brk(0x23021c0) = 0x23021c0 arch_prctl(ARCH_SET_FS, 0x2301880) = 0 uname({sysname="Linux", nodename="tux6", ...}) = 0 readlink("/proc/self/exe", "/home/f_pelz12/gnu/store/wl2l59l"..., 4096) = 77 brk(0x23231c0) = 0x23231c0 brk(0x2324000) = 0x2324000 readlink("/proc/self/exe", "/home/f_pelz12/gnu/store/wl2l59l"..., 4095) = 77 lstat("/gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/sh", 0x7ffd9741c980) = -1 ENOENT (No such file or directory) gettimeofday({tv_sec=1557550876, tv_usec=116037}, NULL) = 0 getpid() = 28923 mkdir("/tmp/guix-exec-ABt7cT", 0700) = 0 stat(".", {st_mode=S_IFDIR|0700, st_size=113, ...}) = 0 stat("/home/f_pelz12", {st_mode=S_IFDIR|0700, st_size=113, ...}) = 0 clone(child_stack=NULL, flags=CLONE_NEWNS|CLONE_NEWUSER|SIGCHLD) = 28924 openat(AT_FDCWD, "/proc/28924/setgroups", O_WRONLY) = 3 write(3, "deny\0", 5) = 5 close(3) = 0 getuid() = 24038 openat(AT_FDCWD, "/proc/28924/uid_map", O_WRONLY) = 3 write(3, "24038 24038 1\n", 14) = 14 close(3) = 0 getgid() = 10004 openat(AT_FDCWD, "/proc/28924/gid_map", O_WRONLY) = 3 write(3, "10004 10004 1\n", 14) = 14 close(3) = 0 wait4(28924, sh: run.c:162: bind_mount: Unexpected error: Permission denied. [{WIFSIGNALED(s) && WTERMSIG(s) == SIGABRT}], 0, NULL) = 28924 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=28924, si_uid=24038, si_status=SIGABRT, si_utime=0, si_stime=0} --- chdir("/") = 0 openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=25, ...}) = 0 getdents64(3, /* 25 entries */, 131072) = 632 unlink("/tmp/guix-exec-ABt7cT/home") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/home", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 mmap(NULL, 135168, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4e71c68000 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 munmap(0x7f4e71c68000, 135168) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/home") = 0 unlink("/tmp/guix-exec-ABt7cT/tmp") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/tmp", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 brk(0x2363000) = 0x2363000 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/tmp") = 0 unlink("/tmp/guix-exec-ABt7cT/mnt") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/mnt", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/mnt") = 0 unlink("/tmp/guix-exec-ABt7cT/sys") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/sys", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/sys") = 0 unlink("/tmp/guix-exec-ABt7cT/libx32") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/libx32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/libx32") = 0 unlink("/tmp/guix-exec-ABt7cT/opt") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/opt", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/opt") = 0 unlink("/tmp/guix-exec-ABt7cT/srv") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/srv", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/srv") = 0 unlink("/tmp/guix-exec-ABt7cT/dev") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/dev", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/dev") = 0 unlink("/tmp/guix-exec-ABt7cT/var") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/var", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/var") = 0 unlink("/tmp/guix-exec-ABt7cT/sbin") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/sbin", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/sbin") = 0 unlink("/tmp/guix-exec-ABt7cT/lib64") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/lib64", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/lib64") = 0 unlink("/tmp/guix-exec-ABt7cT/lib32") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/lib32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/lib32") = 0 unlink("/tmp/guix-exec-ABt7cT/media") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/media", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/media") = 0 unlink("/tmp/guix-exec-ABt7cT/usr") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/usr", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/usr") = 0 unlink("/tmp/guix-exec-ABt7cT/bin") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/bin", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/bin") = 0 unlink("/tmp/guix-exec-ABt7cT/boot") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/boot", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/boot") = 0 unlink("/tmp/guix-exec-ABt7cT/etc") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/etc", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/etc") = 0 unlink("/tmp/guix-exec-ABt7cT/run") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/run", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/run") = 0 unlink("/tmp/guix-exec-ABt7cT/core") = 0 unlink("/tmp/guix-exec-ABt7cT/snap") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/snap", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/snap") = 0 unlink("/tmp/guix-exec-ABt7cT/lib") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/lib", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/lib") = 0 unlink("/tmp/guix-exec-ABt7cT/proc") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/proc", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/proc") = 0 unlink("/tmp/guix-exec-ABt7cT/root") = -1 EISDIR (Is a directory) openat(AT_FDCWD, "/tmp/guix-exec-ABt7cT/root", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 getdents64(4, /* 2 entries */, 131072) = 48 getdents64(4, /* 0 entries */, 131072) = 0 close(4) = 0 rmdir("/tmp/guix-exec-ABt7cT/root") = 0 getdents64(3, /* 0 entries */, 131072) = 0 close(3) = 0 rmdir("/tmp/guix-exec-ABt7cT") = 0 exit_group(6) = ? +++ exited with 6 +++ Thank you for looking into it! Regards, Florian ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-11 5:05 ` pelzflorian (Florian Pelz) @ 2019-05-13 7:49 ` Ludovic Courtès 2019-05-13 10:34 ` pelzflorian (Florian Pelz) 0 siblings, 1 reply; 17+ messages in thread From: Ludovic Courtès @ 2019-05-13 7:49 UTC (permalink / raw) To: pelzflorian (Florian Pelz); +Cc: 35662 Hi Florian, "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: > On Fri, May 10, 2019 at 11:50:19PM +0200, Ludovic Courtès wrote: >> That suggests the wrapper chose the user namespace method (not PRoot), >> but that didn’t quite work. >> >> Could you post the output of: >> >> strace ./mybin/sh >> >> ? My bad, this should be: strace -f -o log ./mybin/sh and then post the ‘log’ file (we need ‘-f’ because the problem happens in the child process.) Thanks in advance, Ludo’. ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-13 7:49 ` Ludovic Courtès @ 2019-05-13 10:34 ` pelzflorian (Florian Pelz) 2019-05-13 13:54 ` Ludovic Courtès 0 siblings, 1 reply; 17+ messages in thread From: pelzflorian (Florian Pelz) @ 2019-05-13 10:34 UTC (permalink / raw) To: Ludovic Courtès; +Cc: 35662 [-- Attachment #1: Type: text/plain, Size: 1962 bytes --] On Mon, May 13, 2019 at 09:49:40AM +0200, Ludovic Courtès wrote: > Hi Florian, > > "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: > > > On Fri, May 10, 2019 at 11:50:19PM +0200, Ludovic Courtès wrote: > >> That suggests the wrapper chose the user namespace method (not PRoot), > >> but that didn’t quite work. > >> > >> Could you post the output of: > >> > >> strace ./mybin/sh > >> > >> ? > > My bad, this should be: > > strace -f -o log ./mybin/sh > > and then post the ‘log’ file (we need ‘-f’ because the problem happens > in the child process.) > > Thanks in advance, > Ludo’. Oh I did not know there is -f. [f_pelz12@tux6 ~]$ strace -f -o log ./mybin/sh sh: run.c:162: bind_mount: Unexpected error: Permission denied. The log file is attached. When I do not use -o log, the unexpected error is here: [pid 36622] mount("//sys", "/tmp/guix-exec-85li6j/sys", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) [pid 36622] openat(AT_FDCWD, "/tmp/guix-exec-85li6j/core", O_WRONLY|O_CREAT, 056306) = 4 [pid 36622] close(4) = 0 [pid 36622] mount("//core", "/tmp/guix-exec-85li6j/core", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) [pid 36622] write(2, "sh: run.c:162: bind_mount: Unexp"..., 64sh: run.c:162: bind_mount: Unexpected error: Permission denied. ) = 64 [pid 36622] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4b024f4000 [pid 36622] rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0 [pid 36622] rt_sigprocmask(SIG_BLOCK, ~[RTMIN RT_1], [], 8) = 0 [pid 36622] getpid() = 36622 [pid 36622] gettid() = 36622 [pid 36622] tgkill(36622, 36622, SIGABRT) = 0 [pid 36622] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 36622] --- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=36622, si_uid=24038} --- [pid 36622] +++ killed by SIGABRT +++ Regards, Florian [-- Attachment #2: log --] [-- Type: text/plain, Size: 16952 bytes --] 32476 execve("./mybin/sh", ["./mybin/sh"], 0x7ffddaa0d868 /* 39 vars */) = 0 32476 brk(NULL) = 0x2220000 32476 brk(0x22211c0) = 0x22211c0 32476 arch_prctl(ARCH_SET_FS, 0x2220880) = 0 32476 uname({sysname="Linux", nodename="tux6", ...}) = 0 32476 readlink("/proc/self/exe", "/home/f_pelz12/gnu/store/wl2l59l"..., 4096) = 77 32476 brk(0x22421c0) = 0x22421c0 32476 brk(0x2243000) = 0x2243000 32476 readlink("/proc/self/exe", "/home/f_pelz12/gnu/store/wl2l59l"..., 4095) = 77 32476 lstat("/gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/sh", 0x7ffd70f35830) = -1 ENOENT (No such file or directory) 32476 gettimeofday({tv_sec=1557741656, tv_usec=607561}, NULL) = 0 32476 getpid() = 32476 32476 mkdir("/tmp/guix-exec-eqHoYA", 0700) = 0 32476 stat(".", {st_mode=S_IFDIR|0700, st_size=114, ...}) = 0 32476 stat("/home/f_pelz12", {st_mode=S_IFDIR|0700, st_size=114, ...}) = 0 32476 clone(child_stack=NULL, flags=CLONE_NEWNS|CLONE_NEWUSER|SIGCHLD) = 32477 32476 openat(AT_FDCWD, "/proc/32477/setgroups", O_WRONLY) = 3 32477 openat(AT_FDCWD, "/", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY <unfinished ...> 32476 write(3, "deny\0", 5 <unfinished ...> 32477 <... openat resumed> ) = 3 32476 <... write resumed> ) = 5 32477 fstat(3, <unfinished ...> 32476 close(3) = 0 32477 <... fstat resumed> {st_mode=S_IFDIR|0755, st_size=25, ...}) = 0 32476 getuid() = 24038 32477 getdents64(3 <unfinished ...> 32476 openat(AT_FDCWD, "/proc/32477/uid_map", O_WRONLY) = 3 32476 write(3, "24038 24038 1\n", 14) = 14 32477 <... getdents64 resumed> , /* 25 entries */, 32768) = 632 32476 close(3) = 0 32477 mkdir("/tmp/guix-exec-eqHoYA/lib", 0700 <unfinished ...> 32476 getgid() = 10004 32476 openat(AT_FDCWD, "/proc/32477/gid_map", O_WRONLY) = 3 32476 write(3, "10004 10004 1\n", 14) = 14 32476 close(3) = 0 32476 wait4(32477, <unfinished ...> 32477 <... mkdir resumed> ) = 0 32477 mount("//lib", "/tmp/guix-exec-eqHoYA/lib", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/home", 0700) = 0 32477 mount("//home", "/tmp/guix-exec-eqHoYA/home", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/libx32", 0700) = 0 32477 mount("//libx32", "/tmp/guix-exec-eqHoYA/libx32", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/etc", 0700) = 0 32477 mount("//etc", "/tmp/guix-exec-eqHoYA/etc", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/run", 0700) = 0 32477 mount("//run", "/tmp/guix-exec-eqHoYA/run", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/sbin", 0700) = 0 32477 mount("//sbin", "/tmp/guix-exec-eqHoYA/sbin", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/media", 0700) = 0 32477 mount("//media", "/tmp/guix-exec-eqHoYA/media", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/lib32", 0700) = 0 32477 mount("//lib32", "/tmp/guix-exec-eqHoYA/lib32", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/lib64", 0700) = 0 32477 mount("//lib64", "/tmp/guix-exec-eqHoYA/lib64", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/bin", 0700) = 0 32477 mount("//bin", "/tmp/guix-exec-eqHoYA/bin", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/usr", 0700) = 0 32477 mount("//usr", "/tmp/guix-exec-eqHoYA/usr", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/boot", 0700) = 0 32477 mount("//boot", "/tmp/guix-exec-eqHoYA/boot", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/dev", 0700) = 0 32477 mount("//dev", "/tmp/guix-exec-eqHoYA/dev", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/var", 0700) = 0 32477 mount("//var", "/tmp/guix-exec-eqHoYA/var", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/root", 0700) = 0 32477 mount("//root", "/tmp/guix-exec-eqHoYA/root", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/proc", 0700) = 0 32477 mount("//proc", "/tmp/guix-exec-eqHoYA/proc", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/opt", 0700) = 0 32477 mount("//opt", "/tmp/guix-exec-eqHoYA/opt", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/srv", 0700) = 0 32477 mount("//srv", "/tmp/guix-exec-eqHoYA/srv", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/snap", 0700) = 0 32477 mount("//snap", "/tmp/guix-exec-eqHoYA/snap", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/mnt", 0700) = 0 32477 mount("//mnt", "/tmp/guix-exec-eqHoYA/mnt", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/tmp", 0700) = 0 32477 mount("//tmp", "/tmp/guix-exec-eqHoYA/tmp", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 mkdir("/tmp/guix-exec-eqHoYA/sys", 0700) = 0 32477 mount("//sys", "/tmp/guix-exec-eqHoYA/sys", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/core", O_WRONLY|O_CREAT, 0116306) = 4 32477 close(4) = 0 32477 mount("//core", "/tmp/guix-exec-eqHoYA/core", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) 32477 write(2, "sh: run.c:162: bind_mount: Unexp"..., 64) = 64 32477 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff846f5e000 32477 rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0 32477 rt_sigprocmask(SIG_BLOCK, ~[RTMIN RT_1], [], 8) = 0 32477 getpid() = 32477 32477 gettid() = 32477 32477 tgkill(32477, 32477, SIGABRT) = 0 32477 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 32477 --- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=32477, si_uid=24038} --- 32477 +++ killed by SIGABRT +++ 32476 <... wait4 resumed> [{WIFSIGNALED(s) && WTERMSIG(s) == SIGABRT}], 0, NULL) = 32477 32476 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=32477, si_uid=24038, si_status=SIGABRT, si_utime=0, si_stime=0} --- 32476 chdir("/") = 0 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 32476 fstat(3, {st_mode=S_IFDIR|0700, st_size=25, ...}) = 0 32476 getdents64(3, /* 25 entries */, 131072) = 632 32476 unlink("/tmp/guix-exec-eqHoYA/lib32") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/lib32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 mmap(NULL, 135168, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff846f3e000 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 munmap(0x7ff846f3e000, 135168) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/lib32") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/media") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/media", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 brk(0x2282000) = 0x2282000 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/media") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/etc") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/etc", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/etc") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/run") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/run", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/run") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/lib64") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/lib64", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/lib64") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/boot") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/boot", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/boot") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/bin") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/bin", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/bin") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/usr") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/usr", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/usr") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/lib") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/lib", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/lib") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/snap") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/snap", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/snap") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/core") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/proc") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/proc", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/proc") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/root") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/root", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/root") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/srv") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/srv", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/srv") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/home") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/home", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/home") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/opt") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/opt", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/opt") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/sys") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/sys", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/sys") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/tmp") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/tmp", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/tmp") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/mnt") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/mnt", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/mnt") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/sbin") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/sbin", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/sbin") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/libx32") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/libx32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/libx32") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/var") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/var", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/var") = 0 32476 unlink("/tmp/guix-exec-eqHoYA/dev") = -1 EISDIR (Is a directory) 32476 openat(AT_FDCWD, "/tmp/guix-exec-eqHoYA/dev", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 32476 fstat(4, {st_mode=S_IFDIR|0700, st_size=2, ...}) = 0 32476 getdents64(4, /* 2 entries */, 131072) = 48 32476 getdents64(4, /* 0 entries */, 131072) = 0 32476 close(4) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA/dev") = 0 32476 getdents64(3, /* 0 entries */, 131072) = 0 32476 close(3) = 0 32476 rmdir("/tmp/guix-exec-eqHoYA") = 0 32476 exit_group(6) = ? 32476 +++ exited with 6 +++ ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-13 10:34 ` pelzflorian (Florian Pelz) @ 2019-05-13 13:54 ` Ludovic Courtès 2019-05-13 15:17 ` pelzflorian (Florian Pelz) 0 siblings, 1 reply; 17+ messages in thread From: Ludovic Courtès @ 2019-05-13 13:54 UTC (permalink / raw) To: pelzflorian (Florian Pelz); +Cc: 35662 Hi Florian, "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: > 32476 clone(child_stack=NULL, flags=CLONE_NEWNS|CLONE_NEWUSER|SIGCHLD) = 32477 [...] > 32477 mount("//lib", "/tmp/guix-exec-eqHoYA/lib", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) > 32477 mkdir("/tmp/guix-exec-eqHoYA/home", 0700) = 0 > 32477 mount("//home", "/tmp/guix-exec-eqHoYA/home", 0x47e0c5, MS_RDONLY|MS_BIND|MS_REC, NULL) = -1 EACCES (Permission denied) This is weird. On a machine without Guix and with “proper” user namespace support, I see: --8<---------------cut here---------------start------------->8--- 4519 clone(child_stack=0, flags=CLONE_NEWNS|CLONE_NEWUSER|SIGCHLD) = 4520 [...] 4520 mkdir("/tmp/guix-exec-4lVNRO/tmp", 0700) = 0 4520 mount("//tmp", "/tmp/guix-exec-4lVNRO/tmp", 0x47e0cc, MS_RDONLY|MS_BIND|MS_REC, NULL) = 0 4520 mkdir("/tmp/guix-exec-4lVNRO/boot", 0700) = 0 4520 mount("//boot", "/tmp/guix-exec-4lVNRO/boot", 0x47e0cc, MS_RDONLY|MS_BIND|MS_REC, NULL) = 0 --8<---------------cut here---------------end--------------->8--- That is, all bind-mount operations in the child process, which lives in a separate namespace, succeed. Can you show the mount options of you root file system? mount | grep 'on / ' What’s the exit code of this command: guile -c '((@@ (guix scripts environment) assert-container-features))' ? Thanks for helping out! Ludo’. ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-13 13:54 ` Ludovic Courtès @ 2019-05-13 15:17 ` pelzflorian (Florian Pelz) 2019-05-13 20:39 ` Ludovic Courtès 0 siblings, 1 reply; 17+ messages in thread From: pelzflorian (Florian Pelz) @ 2019-05-13 15:17 UTC (permalink / raw) To: Ludovic Courtès; +Cc: 35662 On Mon, May 13, 2019 at 03:54:11PM +0200, Ludovic Courtès wrote: > Can you show the mount options of you root file system? > > mount | grep 'on / ' > [f_pelz12@tux6 ~]$ mount | grep 'on / ' rpool/data/subvol-161199-disk-0 on / type zfs (rw,noatime,xattr,posixacl) > What’s the exit code of this command: > > guile -c '((@@ (guix scripts environment) assert-container-features))' > > ? > Guix is not installed. Using a Guix git repository in ~/guix: [f_pelz12@tux6 guix]$ guile -c '((@@ (guix scripts environment) assert-container-features))' […] ;;; In procedure scm_lreadr: guix/packages.scm:534:11: Unknown # object: #\~ ERROR: In procedure primitive-load-path: In procedure scm_lreadr: guix/packages.scm:534:11: Unknown # object: #\~ The line in question is: #~(begin (use-modules (ice-9 ftw) I do not see how to make it recognize gexps. If I wanted to compile Guix myself, the configure script reports various missing dependencies (guile-gnutls is among them). I could ask the admin tomorrow if they could set up guix on a test “virtual machine”/container. I will instead now try this from gnu/build/linux-container.scm: scheme@(guile-user)> (define (user-namespace-supported?) "Return #t if user namespaces are supported on this system." (file-exists? "/proc/self/ns/user")) (define (unprivileged-user-namespace-supported?) "Return #t if user namespaces can be created by unprivileged users." (let ((userns-file "/proc/sys/kernel/unprivileged_userns_clone")) (if (file-exists? userns-file) (eqv? #\1 (call-with-input-file userns-file read-char)) #t))) (define (setgroups-supported?) "Return #t if the setgroups proc file, introduced in Linux-libre 3.19, exists." (file-exists? "/proc/self/setgroups")) scheme@(guile-user)> (user-namespace-supported?) $1 = #t scheme@(guile-user)> (unprivileged-user-namespace-supported?) $2 = #t scheme@(guile-user)> (setgroups-supported?) $3 = #t Regards, Florian ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-13 15:17 ` pelzflorian (Florian Pelz) @ 2019-05-13 20:39 ` Ludovic Courtès 2019-05-13 20:45 ` pelzflorian (Florian Pelz) 0 siblings, 1 reply; 17+ messages in thread From: Ludovic Courtès @ 2019-05-13 20:39 UTC (permalink / raw) To: pelzflorian (Florian Pelz); +Cc: 35662 "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: > On Mon, May 13, 2019 at 03:54:11PM +0200, Ludovic Courtès wrote: >> Can you show the mount options of you root file system? >> >> mount | grep 'on / ' >> > > [f_pelz12@tux6 ~]$ mount | grep 'on / ' > rpool/data/subvol-161199-disk-0 on / type zfs (rw,noatime,xattr,posixacl) I suspect ZFS-on-Linux (right?) is doing something unusual here: mount(2) specifies the following reasons for EACCESS, and I don’t see anything that would apply: --8<---------------cut here---------------start------------->8--- EACCES A component of a path was not searchable. (See also path_resolution(7).) EACCES Mounting a read-only filesystem was attempted without giving the MS_RDONLY flag. The file system may be read-only for various reasons, including: it resides on a read-only optical disk; it is resides on a device with a physical switch that has been set to mark the device read- only; the filesystem implementation was compiled with read-only support; or errors were detected when initially mounting the filesystem, so that it was marked read-only and can't be remounted as read-write (until the errors are fixed). Some filesystems instead return the error EROFS on an attempt to mount a read-only filesystem. EACCES The block device source is located on a filesystem mounted with the MS_NODEV option. --8<---------------cut here---------------end--------------->8--- What do the following commands do on this system? --8<---------------cut here---------------start------------->8--- $ mkdir -p /tmp/test/lib $ unshare -mrf mount /lib /tmp/test/lib -o bind,readonly --8<---------------cut here---------------end--------------->8--- Thanks, Ludo’. ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-13 20:39 ` Ludovic Courtès @ 2019-05-13 20:45 ` pelzflorian (Florian Pelz) 2019-05-14 8:05 ` pelzflorian (Florian Pelz) 0 siblings, 1 reply; 17+ messages in thread From: pelzflorian (Florian Pelz) @ 2019-05-13 20:45 UTC (permalink / raw) To: Ludovic Courtès; +Cc: 35662 On Mon, May 13, 2019 at 10:39:21PM +0200, Ludovic Courtès wrote: > I suspect ZFS-on-Linux (right?) is doing something unusual here: I suppose it is ZFS on Linux; it is Linux, I can ask the admins if it could be something else. > What do the following commands do on this system? > > --8<---------------cut here---------------start------------->8--- > $ mkdir -p /tmp/test/lib > $ unshare -mrf mount /lib /tmp/test/lib -o bind,readonly > --8<---------------cut here---------------end--------------->8--- > [f_pelz12@tux6 ~]$ mkdir -p /tmp/test/lib [f_pelz12@tux6 ~]$ unshare -mrf mount /lib /tmp/test/lib -o bind,readonly unshare: cannot change root filesystem propagation: Permission denied Thank *you*, Ludo! A working guix pack would be helpful for me. Regards, Florian ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-13 20:45 ` pelzflorian (Florian Pelz) @ 2019-05-14 8:05 ` pelzflorian (Florian Pelz) 2019-05-14 20:43 ` Ludovic Courtès 0 siblings, 1 reply; 17+ messages in thread From: pelzflorian (Florian Pelz) @ 2019-05-14 8:05 UTC (permalink / raw) To: Ludovic Courtès; +Cc: 35662 On Mon, May 13, 2019 at 10:45:24PM +0200, pelzflorian (Florian Pelz) wrote: > On Mon, May 13, 2019 at 10:39:21PM +0200, Ludovic Courtès wrote: > > I suspect ZFS-on-Linux (right?) is doing something unusual here: > > I suppose it is ZFS on Linux; it is Linux, I can ask the admins if it > could be something else. > The admins have confirmed that they use “Proxmox on ZFS” (judging from <https://pve.proxmox.com/wiki/ZFS_on_Linux> it is ZFS on Linux) and they have confirmed that they have disabled user namespaces in their Proxmox settings. Regards, Florian ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-14 8:05 ` pelzflorian (Florian Pelz) @ 2019-05-14 20:43 ` Ludovic Courtès 2019-05-14 21:04 ` pelzflorian (Florian Pelz) 2019-05-15 15:20 ` Giovanni Biscuolo 0 siblings, 2 replies; 17+ messages in thread From: Ludovic Courtès @ 2019-05-14 20:43 UTC (permalink / raw) To: pelzflorian (Florian Pelz); +Cc: 35662 "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: > On Mon, May 13, 2019 at 10:45:24PM +0200, pelzflorian (Florian Pelz) wrote: >> On Mon, May 13, 2019 at 10:39:21PM +0200, Ludovic Courtès wrote: >> > I suspect ZFS-on-Linux (right?) is doing something unusual here: >> >> I suppose it is ZFS on Linux; it is Linux, I can ask the admins if it >> could be something else. >> > > The admins have confirmed that they use “Proxmox on ZFS” (judging from > <https://pve.proxmox.com/wiki/ZFS_on_Linux> it is ZFS on Linux) and > they have confirmed that they have disabled user namespaces in their > Proxmox settings. User namespaces are orthogonal to file systems, but anyway it looks like ZFS is refusing to let us do these things. I don’t have any great option to offer. You could perhaps modify run-in-namespace.c so that it doesn’t even try user namespaces and instead goes directly to the PRoot option? However working around this behavior of ZFS it not completely trivial and I’m not sure we should put much energy to paper over non-standard file system behavior. Thoughts? Ludo’. ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-14 20:43 ` Ludovic Courtès @ 2019-05-14 21:04 ` pelzflorian (Florian Pelz) 2019-05-15 16:15 ` Ludovic Courtès 2019-05-15 15:20 ` Giovanni Biscuolo 1 sibling, 1 reply; 17+ messages in thread From: pelzflorian (Florian Pelz) @ 2019-05-14 21:04 UTC (permalink / raw) To: Ludovic Courtès; +Cc: 35662 On Tue, May 14, 2019 at 10:43:56PM +0200, Ludovic Courtès wrote: > "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: > > > On Mon, May 13, 2019 at 10:45:24PM +0200, pelzflorian (Florian Pelz) wrote: > >> On Mon, May 13, 2019 at 10:39:21PM +0200, Ludovic Courtès wrote: > >> > I suspect ZFS-on-Linux (right?) is doing something unusual here: > >> > >> I suppose it is ZFS on Linux; it is Linux, I can ask the admins if it > >> could be something else. > >> > > > > The admins have confirmed that they use “Proxmox on ZFS” (judging from > > <https://pve.proxmox.com/wiki/ZFS_on_Linux> it is ZFS on Linux) and > > they have confirmed that they have disabled user namespaces in their > > Proxmox settings. > > User namespaces are orthogonal to file systems, but anyway it looks like > ZFS is refusing to let us do these things. > Do I understand correctly that user namespaces are not really disabled (?) but fail on ZFS? This seems strange, but a Web search for “zfs user namespaces” shows other people having trouble with this combination. The admins told me they had to disable user namespaces because it caused some kind of trouble. > I don’t have any great option to offer. You could perhaps modify > run-in-namespace.c so that it doesn’t even try user namespaces and > instead goes directly to the PRoot option? > > However working around this behavior of ZFS it not completely trivial > and I’m not sure we should put much energy to paper over non-standard > file system behavior. > > Thoughts? > If ZFS makes user namespaces fail, then could run-un-namespace.c fall back to PRoot when detecting ZFS, somehow? Regards, Florian ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-14 21:04 ` pelzflorian (Florian Pelz) @ 2019-05-15 16:15 ` Ludovic Courtès 0 siblings, 0 replies; 17+ messages in thread From: Ludovic Courtès @ 2019-05-15 16:15 UTC (permalink / raw) To: pelzflorian (Florian Pelz); +Cc: 35662 Hi, "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: > Do I understand correctly that user namespaces are not really disabled > (?) but fail on ZFS? Correct. Specifically, read-only bind mounts of (and to?) files that reside on ZFS fail with EACCESS, which is normally “impossible.” It would be great if you could ask the admins specifically what they did in relation to user namespaces. >> I don’t have any great option to offer. You could perhaps modify >> run-in-namespace.c so that it doesn’t even try user namespaces and >> instead goes directly to the PRoot option? >> >> However working around this behavior of ZFS it not completely trivial >> and I’m not sure we should put much energy to paper over non-standard >> file system behavior. >> >> Thoughts? >> > > If ZFS makes user namespaces fail, then could run-un-namespace.c fall > back to PRoot when detecting ZFS, somehow? It’s code, so everything is possible :-), but like I wrote it’s a bit of work, and it’s something that cannot happen (AFAIK) with file systems that are part of Linux. Thanks, Ludo’. ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-14 20:43 ` Ludovic Courtès 2019-05-14 21:04 ` pelzflorian (Florian Pelz) @ 2019-05-15 15:20 ` Giovanni Biscuolo 2019-05-16 11:02 ` pelzflorian (Florian Pelz) 1 sibling, 1 reply; 17+ messages in thread From: Giovanni Biscuolo @ 2019-05-15 15:20 UTC (permalink / raw) To: Ludovic Courtès, pelzflorian (Florian Pelz); +Cc: 35662 [-- Attachment #1: Type: text/plain, Size: 2320 bytes --] Hello Ludovic and Florian, I cannot help here, just some thoughts as you probably already know, Florian, ZFS is not supported in Linux for various reasons, above all for a controversial licensing problem [1] so using zfsonlinux (the ZFS Linux unofficial kernel module) is basically calling for problems Ludovic Courtès <ludo@gnu.org> writes: > "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: [...] >> The admins have confirmed that they use “Proxmox on ZFS” (judging from >> <https://pve.proxmox.com/wiki/ZFS_on_Linux> it is ZFS on Linux) it's not clearly stated there, I guess it's https://github.com/zfsonlinux/zfs >> and >> they have confirmed that they have disabled user namespaces in their >> Proxmox settings. I do not understand what this means: if namespaces are disabled **in kernel** that whould be detected and guix relocatable binaries should use PRoot by default: am I wrong? If "disabled user namespace in Promox settings" means it have something to do with ZFS filesystem settings, well: it's unorthodox at least :-) > User namespaces are orthogonal to file systems, but anyway it looks like > ZFS is refusing to let us do these things. I don't know if this have something to do with this bug, but: ZFS is confused by user namespaces (uid/gid mapping) when used with acltype=posixacl https://github.com/zfsonlinux/zfs/issues/4177 Florian: it should be solved but AFAIU it depends on the kernel/zfsonlinux combination > I don’t have any great option to offer. You could perhaps modify > run-in-namespace.c so that it doesn’t even try user namespaces and > instead goes directly to the PRoot option? Ludovic (and others): is it possible to add an option to "guix pack -RR" (-RRF?!?) to force the use of PRoot for resulting relocated binaries? > However working around this behavior of ZFS it not completely trivial > and I’m not sure we should put much energy to paper over non-standard > file system behavior. I agree, this seems a zfsonlinux bug: Florian please can you report it upstream to zfsonlinux? [...] HTH! Gio' [1] https://www.fsf.org/licensing/zfs-and-linux https://sfconservancy.org/blog/2016/feb/25/zfs-and-linux/ -- Giovanni Biscuolo Xelera IT Infrastructures [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 832 bytes --] ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-15 15:20 ` Giovanni Biscuolo @ 2019-05-16 11:02 ` pelzflorian (Florian Pelz) 2019-05-16 11:10 ` Ludovic Courtès 0 siblings, 1 reply; 17+ messages in thread From: pelzflorian (Florian Pelz) @ 2019-05-16 11:02 UTC (permalink / raw) To: Giovanni Biscuolo; +Cc: 35662 On Wed, May 15, 2019 at 05:20:25PM +0200, Giovanni Biscuolo wrote: > Hello Ludovic and Florian, > > I cannot help here, just some thoughts > > as you probably already know, Florian, ZFS is not supported in Linux for > various reasons, above all for a controversial licensing problem [1] > I had forgotten. I remember now that I heard about this. From a Guix point of view, I believe this maybe should be a WONT-FIX/NOT-OUR-BUG. I will try and set up current ZFS 0.7.13 and test if guix pack -RR works there in a week. Feel free to skip this unless you are interested: I asked the admins again. They are using Proxmox 5.4. They say they have disabled user namespaces by commenting the corresponding line in the Proxmox config file (but I am unsure if this just disables Linux Container use of user namespaces or something). They use the ZFS from Proxmox. I looked and found confirmation that this Proxmox uses current ZFS 0.7.13 at: https://pve.proxmox.com/wiki/Roadmap http://download.proxmox.com/debian/pve/dists/stretch/pve-no-subscription/binary-amd64/ > I agree, this seems a zfsonlinux bug: Florian please can you report it > upstream to zfsonlinux? > I will try to reproduce on a private PC in a week, then I can report. Regards, Florian ^ permalink raw reply [flat|nested] 17+ messages in thread
* bug#35662: Really relocatable binaries crash with Permission denied 2019-05-16 11:02 ` pelzflorian (Florian Pelz) @ 2019-05-16 11:10 ` Ludovic Courtès 0 siblings, 0 replies; 17+ messages in thread From: Ludovic Courtès @ 2019-05-16 11:10 UTC (permalink / raw) To: pelzflorian (Florian Pelz); +Cc: 35662 Hello, "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis: > From a Guix point of view, I believe this maybe should be a > WONT-FIX/NOT-OUR-BUG. Sounds good to me. :-) Thanks, Ludo’. ^ permalink raw reply [flat|nested] 17+ messages in thread
end of thread, other threads:[~2019-05-16 11:23 UTC | newest] Thread overview: 17+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2019-05-09 22:01 bug#35662: Really relocatable binaries crash with Permission denied pelzflorian (Florian Pelz) 2019-05-10 5:54 ` pelzflorian (Florian Pelz) 2019-05-10 21:50 ` Ludovic Courtès 2019-05-11 5:05 ` pelzflorian (Florian Pelz) 2019-05-13 7:49 ` Ludovic Courtès 2019-05-13 10:34 ` pelzflorian (Florian Pelz) 2019-05-13 13:54 ` Ludovic Courtès 2019-05-13 15:17 ` pelzflorian (Florian Pelz) 2019-05-13 20:39 ` Ludovic Courtès 2019-05-13 20:45 ` pelzflorian (Florian Pelz) 2019-05-14 8:05 ` pelzflorian (Florian Pelz) 2019-05-14 20:43 ` Ludovic Courtès 2019-05-14 21:04 ` pelzflorian (Florian Pelz) 2019-05-15 16:15 ` Ludovic Courtès 2019-05-15 15:20 ` Giovanni Biscuolo 2019-05-16 11:02 ` pelzflorian (Florian Pelz) 2019-05-16 11:10 ` Ludovic Courtès
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