Debian Bug report logs - #830912
fakeroot complains about missing acl_* symbols

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Eric Valette <eric.valette@free.fr>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: fakeroot complains about missing acl_* symbols

Date: Wed, 13 Jul 2016 00:02:28 +0200

Package: fakeroot
Version: 1.21-1
Severity: normal

fakeroot
dlsym(acl_get_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_fd
dlsym(acl_get_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_file
dlsym(acl_set_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_fd
dlsym(acl_set_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_file
dlsym(acl_get_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_fd
dlsym(acl_get_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_file
dlsym(acl_set_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_fd
dlsym(acl_set_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_file
dlsym(acl_get_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_fd
dlsym(acl_get_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_file
dlsym(acl_set_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_fd
dlsym(acl_set_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_file

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.4.14 (SMP w/8 CPU cores; PREEMPT)
Locale: LANG=fr_FR.UTF8, LC_CTYPE=fr_FR.UTF8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages fakeroot depends on:
ii  libc6        2.23.90+20160711.c10f90d-1
ii  libfakeroot  1.21-1

fakeroot recommends no packages.

fakeroot suggests no packages.

-- no debconf information

Message #10 received at 830912@bugs.debian.org (full text, mbox, reply):

From: Aurelien Jarno <aurelien@aurel32.net>

To: Eric Valette <eric.valette@free.fr>

Cc: 830912@bugs.debian.org

Subject: Bug#830912: fakeroot complains about missing acl_* symbols

Date: Wed, 27 Jul 2016 00:31:21 +0200

control: affects -1 libc6

On 2016-07-13 00:02, Eric Valette wrote:
> Package: fakeroot
> Version: 1.21-1
> Severity: normal
> 
> fakeroot
> dlsym(acl_get_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_fd
> dlsym(acl_get_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_file
> dlsym(acl_set_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_fd
> dlsym(acl_set_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_file
> dlsym(acl_get_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_fd
> dlsym(acl_get_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_file
> dlsym(acl_set_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_fd
> dlsym(acl_set_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_file
> dlsym(acl_get_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_fd
> dlsym(acl_get_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_file
> dlsym(acl_set_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_fd
> dlsym(acl_set_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_file

[ snip ]

> Versions of packages fakeroot depends on:
> ii  libc6        2.23.90+20160711.c10f90d-1

The reason why these messages have appeared is that you install glibc
from experimental. It includes the following fix:

| commit 7d45c163d00c88d5875a112343c4ea3e61349e6b
| Author: Florian Weimer <fweimer@redhat.com>
| Date:   Thu Mar 31 11:26:55 2016 +0200
| 
|     Report dlsym, dlvsym lookup errors using dlerror [BZ #19509]
|     
|         * elf/dl-lookup.c (_dl_lookup_symbol_x): Report error even if
|         skip_map != NULL.
|         * elf/tst-dlsym-error.c: New file.
|         * elf/Makefile (tests): Add tst-dlsym-error.
|         (tst-dlsym-error): Link against libdl.


Basically now dlerror() correctly returns an error message when dlsym
fails due to a missing symbol. The acl symbols are not in libc, but in
libacl so they are not found.

It looks like this error message should probably be conditioned on
LIBFAKEROOT_DEBUGGING.

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net

Message #17 received at 830912@bugs.debian.org (full text, mbox, reply):

From: Julian Andres Klode <juliank@ubuntu.com>

To: Debian Bug Tracking System <830912@bugs.debian.org>

Subject: [PATCH] Hide errors from dlsym

Date: Fri, 12 Aug 2016 18:17:59 +0200

Package: fakeroot
Version: 1.21-1
Followup-For: Bug #830912
User: ubuntu-devel@lists.ubuntu.com
Usertags: origin-ubuntu yakkety ubuntu-patch



*** /tmp/tmp5iowY_/bug_body

In Ubuntu, the attached patch was applied to achieve the following:

Hide the warnings, at least for now. This should bring us back to glibc 2.23
state, AFAICT.

  * Add hide-dlsym-error.patch to hide the errors from dlsym() unless
    debugging was enabled. This makes builds less noisy and fixes failures
    in APT test suite with glibc 2.24, which started reporting errors for
    dlsym()


Thanks for considering the patch.

*** /tmp/tmp5iowY_/fakeroot_1.21-1ubuntu2.debdiff
diff -Nru fakeroot-1.21/debian/patches/hide-dlsym-error.patch fakeroot-1.21/debian/patches/hide-dlsym-error.patch
--- fakeroot-1.21/debian/patches/hide-dlsym-error.patch	1970-01-01 01:00:00.000000000 +0100
+++ fakeroot-1.21/debian/patches/hide-dlsym-error.patch	2016-08-12 15:40:08.000000000 +0200
@@ -0,0 +1,32 @@
+Description: Hide error from dlsym()
+ dlsym(), starting in glibc 2.24 actually reports errors. In our case,
+ we try to get ACL functions which are not in the glibc. This causes
+ failures in test suites, so hide those messages for non-debugging
+ purposes for now. It also makes the build logs annoying to read.
+Author: Julian Andres Klode <juliank@ubuntu.com>
+Origin: vendor
+Bug-Debian: https://bugs.debian.org/830912
+Forwarded: no
+Last-Update: 2016-08-12
+
+--- a/libfakeroot.c
++++ b/libfakeroot.c
+@@ -256,10 +256,16 @@ void load_library_symbols(void){
+  /* clear dlerror() just in case dlsym() legitimately returns NULL */
+     msg = dlerror();
+     *(next_wrap[i].doit)=dlsym(get_libc(), next_wrap[i].name);
++
+     if ( (msg = dlerror()) != NULL){
+-      fprintf (stderr, "dlsym(%s): %s\n", next_wrap[i].name, msg);
+-/*    abort ();*/
++#ifdef LIBFAKEROOT_DEBUGGING
++      if (fakeroot_debug) {
++        fprintf (stderr, "dlsym(%s): %s\n", next_wrap[i].name, msg);
++/*      abort ();*/
++      }
++#endif
+     }
++
+   }
+ }
+ 
diff -Nru fakeroot-1.21/debian/patches/series fakeroot-1.21/debian/patches/series
--- fakeroot-1.21/debian/patches/series	2016-08-12 13:01:28.000000000 +0200
+++ fakeroot-1.21/debian/patches/series	2016-08-12 14:48:31.000000000 +0200
@@ -1,3 +1,4 @@
 eglibc-fts-without-LFS
 #glibc-xattr-types
 getopt-gnu-test.patch
+hide-dlsym-error.patch


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (900, 'unstable'), (500, 'unstable-debug'), (500, 'testing'), (500, 'stable'), (100, 'experimental'), (1, 'experimental-debug')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.6.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

-- 
Debian Developer - deb.li/jak | jak-linux.org - free software dev

When replying, only quote what is necessary, and write each reply
directly below the part(s) it pertains to (`inline'). Thank you.

Message #22 received at 830912@bugs.debian.org (full text, mbox, reply):

From: Michael Biebl <biebl@debian.org>

To: 830912@bugs.debian.org

Subject: Re: Bug#830912: fakeroot complains about missing acl_* symbols

Date: Thu, 1 Sep 2016 12:04:28 +0200

[Message part 1 (text/plain, inline)]

Control: severity -1 important

On Wed, 27 Jul 2016 00:31:21 +0200 Aurelien Jarno <aurelien@aurel32.net>
wrote:
> control: affects -1 libc6
> 
> On 2016-07-13 00:02, Eric Valette wrote:
> > Package: fakeroot
> > Version: 1.21-1
> > Severity: normal
> > 
> > fakeroot
> > dlsym(acl_get_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_fd
> > dlsym(acl_get_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_file
> > dlsym(acl_set_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_fd
> > dlsym(acl_set_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_file
> > dlsym(acl_get_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_fd
> > dlsym(acl_get_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_file
> > dlsym(acl_set_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_fd
> > dlsym(acl_set_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_file
> > dlsym(acl_get_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_fd
> > dlsym(acl_get_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_get_file
> > dlsym(acl_set_fd): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_fd
> > dlsym(acl_set_file): /usr/lib/x86_64-linux-gnu/libfakeroot/libfakeroot-sysv.so: undefined symbol: acl_set_file
> 
> [ snip ]
> 
> > Versions of packages fakeroot depends on:
> > ii  libc6        2.23.90+20160711.c10f90d-1
> 
> The reason why these messages have appeared is that you install glibc
> from experimental. It includes the following fix:
> 

Since glibc 2.24 has entered unstable, I think it's justified to bump
the severity slightly.

Would be great to have a fix for fakeroot soon. Atm, building deb
packages (which usually use fakeroot) is severely hampered by those log
messages being spewed all over the terminal.

Regards,
Michael


-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

[signature.asc (application/pgp-signature, attachment)]

Message #29 received at 830912-close@bugs.debian.org (full text, mbox, reply):

From: Clint Adams <clint@debian.org>

To: 830912-close@bugs.debian.org

Subject: Bug#830912: fixed in fakeroot 1.21-2

Date: Thu, 01 Sep 2016 16:21:18 +0000

Source: fakeroot
Source-Version: 1.21-2

We believe that the bug you reported is fixed in the latest version of
fakeroot, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 830912@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Clint Adams <clint@debian.org> (supplier of updated fakeroot package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 1.8
Date: Thu, 01 Sep 2016 10:50:06 -0400
Source: fakeroot
Binary: fakeroot libfakeroot
Architecture: source
Version: 1.21-2
Distribution: unstable
Urgency: medium
Maintainer: Clint Adams <clint@debian.org>
Changed-By: Clint Adams <clint@debian.org>
Description:
 fakeroot   - tool for simulating superuser privileges
 libfakeroot - tool for simulating superuser privileges - shared libraries
Closes: 830912
Changes:
 fakeroot (1.21-2) unstable; urgency=medium
 .
   * Patch from Julian Andres Klode (hide-dlsym-error.patch) to hide the
     errors from dlsym() unless debugging was enabled. This makes builds
     less noisy and fixes failures in APT test suite with glibc 2.24,
     which started reporting errors for dlsym().  closes: #830912.
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 7f09b96b495f3502ff8d805376eb74cd98ee188f 22308 fakeroot_1.21-2.debian.tar.xz
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 dcda0518dc586bcc67ce90b7a1e3f34624cd0b672237fa4e31342849ee2739e6 2066 fakeroot_1.21-2.dsc
 2d6ff6900ebc553b0b66d910b5a7ad4889dd738cd757629afe4bc4e80be484e3 22308 fakeroot_1.21-2.debian.tar.xz
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