[Bug 1891551] Re: (Ubuntu 16.04) automount 5.1.1 hardcoding libraries
Christian Ehrhardt
1891551 at bugs.launchpad.net
Mon Aug 17 15:55:10 UTC 2020
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://stackoverflow.com/questions/2463150/what-is-the-fpie-option-for-position-independent-executables-in-gcc-and-ld
https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html
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https://bugs.launchpad.net/bugs/1891551
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:
* http://archive.ubuntu.com/ubuntu/pool/main/a/autofs/autofs_5.1.1.orig.tar.gz
* http://archive.ubuntu.com/ubuntu/pool/main/a/autofs/autofs_5.1.1-1ubuntu3.debian.tar.xz
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
* http://de.archive.ubuntu.com/ubuntu/pool/main/a/autofs/autofs_5.1.1-1ubuntu3_amd64.deb
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/lookup_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_file.so [0]; needed by /media/GenericFlash_sdb1/usr/sbin/automount [0]
9852: file=/media/GenericFlash_sdb1/usr/lib/x86_64-linux-gnu/autofs/lookup_file.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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