NTAC:3NS-20

Christian, thank you. 

I am not familiar with compiling on Intel-like instruction sets so don't
Understand why, if Intel-like processors actually support position
Independent code, why there is a mix in the libraries.

I notice that there is a mix of /lib/x86_64-linux-gnu/ and
/usr/lib/x86_64-linux-gnu in the ldd output below, however nothing in
either of those paths should have been changed as its forbidden.

Is there a way of listing whether -PIE is present in my libraries so
that I can begin to understand how it is that I seemingly have a mix
hence resulting in incompatibility.

I really needs NFS to work and would prefer not to be forced to have
to go to HP and ask forgiveness for unlocking the write filter and
installing the package in its usual place.

Kind regards,

M.

-----Original Message-----
From: <email address hidden> [mailto:<email address hidden>] On Behalf Of
Christian Ehrhardt ?
Sent: 17 August 2020 16:55
Subject: [EXT] [Bug 1891551] Re: (Ubuntu 16.04) automount 5.1.1
hardcoding libraries

This email originated from outside the organization.  Do not click links
or open attachments unless you have verified this email is legitimate.

I really want to help you but I think I can't solve the full issue.

For the sake of being kind I checked what this flag is:

 980 /* Flag value in in the DT_FLAGS_1 .dynamic entry.  */
981 #define DF_1_NOW>***0x00000001
982 #define DF_1_GLOBAL>0x00000002
983 #define DF_1_GROUP>*0x00000004
984 #define DF_1_NODELETE>**0x00000008
985 #define DF_1_LOADFLTR>**0x00000010
986 #define DF_1_INITFIRST>*0x00000020
987 #define DF_1_NOOPEN>0x00000040
988 #define DF_1_ORIGIN>0x00000080
989 #define DF_1_DIRECT>0x00000100
990 #define DF_1_TRANS>*0x00000200
991 #define DF_1_INTERPOSE>*0x00000400
992 #define DF_1_NODEFLIB>**0x00000800
993 #define DF_1_NODUMP>0x00001000
994 #define DF_1_CONFALT>***0x00002000
995 #define DF_1_ENDFILTEE>*0x00004000
996 #define>DF_1_DISPRELDNE>0x00008000
997 #define>DF_1_DISPRELPND>0x00010000
998 #define>DF_1_NODIRECT>**0x00020000
999 #define>DF_1_IGNMULDEF>*0x00040000
1000 #define>DF_1_NOKSYMS>***0x00080000
1001 #define>DF_1_NOHDR>*0x00100000
1002 #define>DF_1_EDITED>0x00200000
1003 #define>DF_1_NORELOC>***0x00400000
1004 #define>DF_1_SYMINTPOSE>0x00800000
1005 #define>DF_1_GLOBAUDIT>*0x01000000
1006 #define>DF_1_SINGLETON>*0x02000000
1007 #define>DF_1_STUB>**0x04000000
1008 #define>DF_1_PIE>***0x08000000 

So the assumption is that one binary is build with and one without PIE.

You'd need to fixup the lib you try to insert to match (much) better.
See also
https://urldefense.com/v3/__https://stackoverflow.com/questions/2463150/
what-is-the-fpie-option-for-position-independent-executables-in-gcc-and-
ld__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0iMMRz7nKecwkZ5kJc3E1R6-BZjEkKEoNL60vubTKn
X9Enuv3cM-GQ$
<https://urldefense.com/v3/__https:/stackoverflow.com/questions/2463150/
what-is-the-fpie-option-for-position-independent-executables-in-gcc-and-
ld__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0iMMRz7nKecwkZ5kJc3E1R6-BZjEkKEoNL60vubTKn
X9Enuv3cM-GQ$> 
https://urldefense.com/v3/__https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-
Options.html__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0iMMRz7nKecwkZ5kJc3E1R6-BZjEkKEo
NL60vubTKnX9EntQ8Z7CrQ$
<https://urldefense.com/v3/__https:/gcc.gnu.org/onlinedocs/gcc/Code-Gen-
Options.html__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0iMMRz7nKecwkZ5kJc3E1R6-BZjEkKEo
NL60vubTKnX9EntQ8Z7CrQ$> 

--
You received this bug notification because you are subscribed to the bug
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https://urldefense.com/v3/__https://bugs.launchpad.net/bugs/1891551__;!!
Oe2TtrU3ZNiRdQ!aVh9voqF0iMMRz7nKecwkZ5kJc3E1R6-BZjEkKEoNL60vubTKnX9EnuII
yKBBg$
<https://urldefense.com/v3/__https:/bugs.launchpad.net/bugs/1891551__;!!
Oe2TtrU3ZNiRdQ!aVh9voqF0iMMRz7nKecwkZ5kJc3E1R6-BZjEkKEoNL60vubTKnX9EnuII
yKBBg$> 

Title:
  (Ubuntu 16.04) automount 5.1.1 hardcoding libraries

Status in autofs package in Ubuntu:
  Confirmed

Bug description:
  Unable to use ld.conf methods (LD_LIBRARY_PATH, LD_PRELOAD) to locate
  modules.

  Context: HP ThinPro 7.1 Service Pack 8 (latest) is still based on
Ubuntu 16.04 LTS
  Use Case: Thin Client -- HP will not allow Customers to install
anything to OS
  partition, e.g. to /usr.  automount installed from Canonical's
repository but to
  /usr on a flash drive e.g. /media/GenericFlash_sdb1/usr

  the string: /usr/lib/x86_64-linux-gnu/autofs appears in the binary.
automount
  does not search /media/GenericFlash_sdb1/usr defined with
LD_LIBRARY_PATH.

  Source Package:
  *
https://urldefense.com/v3/__http://archive.ubuntu.com/ubuntu/pool/main/a
/autofs/autofs_5.1.1.orig.tar.gz__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0iMMRz7nKecw
kZ5kJc3E1R6-BZjEkKEoNL60vubTKnX9Enup6rAuTA$
<https://urldefense.com/v3/__http:/archive.ubuntu.com/ubuntu/pool/main/a
/autofs/autofs_5.1.1.orig.tar.gz__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0iMMRz7nKecw
kZ5kJc3E1R6-BZjEkKEoNL60vubTKnX9Enup6rAuTA$> 
  *
https://urldefense.com/v3/__http://archive.ubuntu.com/ubuntu/pool/main/a
/autofs/autofs_5.1.1-1ubuntu3.debian.tar.xz__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0
iMMRz7nKecwkZ5kJc3E1R6-BZjEkKEoNL60vubTKnX9EntQ4oReLw$
<https://urldefense.com/v3/__http:/archive.ubuntu.com/ubuntu/pool/main/a
/autofs/autofs_5.1.1-1ubuntu3.debian.tar.xz__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0
iMMRz7nKecwkZ5kJc3E1R6-BZjEkKEoNL60vubTKnX9EntQ4oReLw$> 

  Release:
  Description:    ThinPro 7.1.0
  Release:        7.1.0

  Binary Package:
  Package: autofs (5.1.1-1ubuntu3) autofs_5.1.1-1ubuntu3_amd64.deb
  *
https://urldefense.com/v3/__http://de.archive.ubuntu.com/ubuntu/pool/mai
n/a/autofs/autofs_5.1.1-1ubuntu3_amd64.deb__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0i
MMRz7nKecwkZ5kJc3E1R6-BZjEkKEoNL60vubTKnX9EnujO86jCw$
<https://urldefense.com/v3/__http:/de.archive.ubuntu.com/ubuntu/pool/mai
n/a/autofs/autofs_5.1.1-1ubuntu3_amd64.deb__;!!Oe2TtrU3ZNiRdQ!aVh9voqF0i
MMRz7nKecwkZ5kJc3E1R6-BZjEkKEoNL60vubTKnX9EnujO86jCw$> 

 
  Expected Behaviour:
  Setting
LD_LIBRARY_PATH=/media/GenericFlash_sdb1/usr/lib/x86_64-linux-gnu/autofs
  overriding compiled location of modules so that automount works
correctly.

  Actual Behaviour:
  automount fails to find its modules:

  Code:

  # /media/GenericFlash_sdb1/usr/sbin/automount -V

  Linux automount version 5.1.1

  Directories:
          config dir:     /etc/default
          maps dir:       /etc
          modules dir:    /usr/lib/x86_64-linux-gnu/autofs

  Compile options:
    ENABLE_FORCED_SHUTDOWN ENABLE_IGNORE_BUSY_MOUNTS WITH_HESIOD
    WITH_LDAP WITH_SASL LIBXML2_WORKAROUND

 
  # ldd /media/GenericFlash_sdb1/usr/sbin/automount
         linux-vdso.so.1 =>  (0x00007ffc51113000)
         libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
(0x00007f1729ec8000)
         libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2
(0x00007f1729cc0000)
         libxml2.so.2 => /usr/lib/x86_64-linux-gnu/libxml2.so.2
(0x00007f1729900000)
         libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6
(0x00007f1729530000)
         /lib64/ld-linux-x86-64.so.2 (0x00007f172a330000)
         libicuuc.so.55 => /usr/lib/x86_64-linux-gnu/libicuuc.so.55
(0x00007f1729198000)
         libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1
(0x00007f1728f78000)
         liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5
(0x00007f1728d50000)
         libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6
(0x00007f1728a40000)
         libicudata.so.55 => /usr/lib/x86_64-linux-gnu/libicudata.so.55
(0x00007f1726f88000)
         libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
(0x00007f1726c00000)
         libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1
(0x00007f17269e8000)

  # LD_DEBUG=files
LD_PRELOAD=/media/GenericFlash_sdb1/usr/lib/x86_64-linux-gnu/autofs/look
up_file.so /media/GenericFlash_sdb1/usr/sbin/automount -d -v -f
        9852:     WARNING: Unsupported flag value(s) of 0x8000000 in
DT_FLAGS_1.
        9852:
file=/media/GenericFlash_sdb1/usr/lib/x86_64-linux-gnu/autofs/lookup_fil
e.so [0];  needed by /media/GenericFlash_sdb1/usr/sbin/automount [0]
        9852:
file=/media/GenericFlash_sdb1/usr/lib/x86_64-linux-gnu/autofs/lookup_fil
e.so [0];  generating link map
        9852:       dynamic: 0x00007f1737094d18  base:
0x00007f1736e68000   size: 0x000000000022f870
        9852:         entry: 0x00007f1736e70f00  phdr:
0x00007f1736e68040  phnum:                  7
        9852:
        9852:     file=libpthread.so.0 [0];  needed by
/media/GenericFlash_sdb1/usr/sbin/automount [0]
        9852:     file=libpthread.so.0 [0];  generating link map
        9852:       dynamic: 0x00007f1736e5fd50  base:
0x00007f1736c48000   size: 0x000000000021c428
        9852:         entry: 0x00007f1736c4e0b0  phdr:
0x00007f1736c48040  phnum:                  9
        9852:
        9852:     file=libdl.so.2 [0];  needed by
/media/GenericFlash_sdb1/usr/sbin/automount [0]
        9852:     file=libdl.so.2 [0];  generating link map
        9852:       dynamic: 0x00007f1736c42d88  base:
0x00007f1736a40000   size: 0x00000000002030f0
        9852:         entry: 0x00007f1736a40da0  phdr:
0x00007f1736a40040  phnum:                  7
        9852:
        9852:     file=libxml2.so.2 [0];  needed by
/media/GenericFlash_sdb1/usr/sbin/automount [0]
        9852:     file=libxml2.so.2 [0];  generating link map
        9852:       dynamic: 0x00007f1736a37808  base:
0x00007f1736680000   size: 0x00000000003ba9b8
        9852:         entry: 0x00007f17366ad6f0  phdr:
0x00007f1736680040  phnum:                  7
        9852:
        9852:     file=libc.so.6 [0];  needed by
/media/GenericFlash_sdb1/usr/sbin/automount [0]
        9852:     file=libc.so.6 [0];  generating link map
        9852:       dynamic: 0x00007f1736673ba0  base:
0x00007f17362b0000   size: 0x00000000003c99a0
        9852:         entry: 0x00007f17362d0950  phdr:
0x00007f17362b0040  phnum:                 10
        9852:
        9852:     file=libicuuc.so.55 [0];  needed by
/usr/lib/x86_64-linux-gnu/libxml2.so.2 [0]
        9852:     file=libicuuc.so.55 [0];  generating link map
        9852:       dynamic: 0x00007f17362a6ae0  base:
0x00007f1735f18000   size: 0x0000000000393b20
        9852:         entry: 0x00007f1735f6d4d0  phdr:
0x00007f1735f18040  phnum:                  7
        9852:
        9852:     file=libz.so.1 [0];  needed by
/usr/lib/x86_64-linux-gnu/libxml2.so.2 [0]
        9852:     file=libz.so.1 [0];  generating link map
        9852:       dynamic: 0x00007f1735f10dd0  base:
0x00007f1735cf8000   size: 0x0000000000219128
        9852:         entry: 0x00007f1735cf9db0  phdr:
0x00007f1735cf8040  phnum:                  7
        9852:
        9852:     file=liblzma.so.5 [0];  needed by
/usr/lib/x86_64-linux-gnu/libxml2.so.2 [0]
        9852:     file=liblzma.so.5 [0];  generating link map
        9852:       dynamic: 0x00007f1735cf1dc0  base:
0x00007f1735ad0000   size: 0x0000000000222078
        9852:         entry: 0x00007f1735ad2090  phdr:
0x00007f1735ad0040  phnum:                  7
        9852:
        9852:     file=libm.so.6 [0];  needed by
/usr/lib/x86_64-linux-gnu/libxml2.so.2 [0]
        9852:     file=libm.so.6 [0];  generating link map
        9852:       dynamic: 0x00007f1735ac7d88  base:
0x00007f17357c0000   size: 0x00000000003080f8
        9852:         entry: 0x00007f17357c5600  phdr:
0x00007f17357c0040  phnum:                  7
        9852:
        9852:     file=libicudata.so.55 [0];  needed by
/usr/lib/x86_64-linux-gnu/libicuuc.so.55 [0]
        9852:     file=libicudata.so.55 [0];  generating link map
        9852:       dynamic: 0x00007f17357bddf0  base:
0x00007f1733d08000   size: 0x0000000001ab6010
        9852:         entry: 0x00007f1733d08530  phdr:
0x00007f1733d08040  phnum:                  6
        9852:
        9852:     file=libstdc++.so.6 [0];  needed by
/usr/lib/x86_64-linux-gnu/libicuuc.so.55 [0]
        9852:     file=libstdc++.so.6 [0];  generating link map
        9852:       dynamic: 0x00007f1733cfad50  base:
0x00007f1733980000   size: 0x0000000000381400
        9852:         entry: 0x00007f1733a09d20  phdr:
0x00007f1733980040  phnum:                  8
        9852:
        9852:     file=libgcc_s.so.1 [0];  needed by
/usr/lib/x86_64-linux-gnu/libicuuc.so.55 [0]
        9852:     file=libgcc_s.so.1 [0];  generating link map
        9852:       dynamic: 0x00007f173397d2b0  base:
0x00007f1733768000   size: 0x0000000000215910
        9852:         entry: 0x00007f173376aa70  phdr:
0x00007f1733768040  phnum:                  6
        9852:
        9852:     calling init: /lib/x86_64-linux-gnu/libpthread.so.0
        9852:     calling init: /lib/x86_64-linux-gnu/libc.so.6
        9852:     calling init: /lib/x86_64-linux-gnu/libgcc_s.so.1
        9852:     calling init: /lib/x86_64-linux-gnu/libm.so.6
        9852:     calling init: /usr/lib/x86_64-linux-gnu/libstdc++.so.6
        9852:     calling init:
/usr/lib/x86_64-linux-gnu/libicudata.so.55
        9852:     calling init: /lib/x86_64-linux-gnu/libdl.so.2
        9852:     calling init: /lib/x86_64-linux-gnu/liblzma.so.5
        9852:     calling init: /lib/x86_64-linux-gnu/libz.so.1
        9852:     calling init: /usr/lib/x86_64-linux-gnu/libicuuc.so.55
        9852:     calling init: /usr/lib/x86_64-linux-gnu/libxml2.so.2
        9852:     calling init:
/media/GenericFlash_sdb1/usr/lib/x86_64-linux-gnu/autofs/lookup_file.so
        9852:     initialize program:
/media/GenericFlash_sdb1/usr/sbin/automount
        9852:     transferring control:
/media/GenericFlash_sdb1/usr/sbin/automount
  Starting automounter version 5.1.1, master map /etc/auto.master
  using kernel protocol version 5.05
        9852:     file=libxml2.so [0];  dynamically loaded by
/media/GenericFlash_sdb1/usr/sbin/automount [0]
        9852:     opening file=/usr/lib/x86_64-linux-gnu/libxml2.so.2
[0]; direct_opencount=1
  lookup_nss_read_master: reading master file /etc/auto.master
        9852:     file=/usr/lib/x86_64-linux-gnu/autofs/lookup_file.so
[0];  dynamically loaded by /media/GenericFlash_sdb1/usr/sbin/automount
[0]
  open_lookup:93: cannot open lookup module file
(/usr/lib/x86_64-linux-gnu/autofs/lookup_file.so:
  cannot open shared object file: No such file or directory)
  no mounts in table

  Resolution Requested:
  If this cannot be accepted as a bug, pointers to a work around given
restrictions placed by HP and that all Linux machines here are thin
clients and not development environments.

  Thank you.

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