Bug#963508: /lib/ld-linux.so.2: LD_PRELOAD breaks with plain filename
Package: libc6
Version: 2.28-10
Severity: normal
File: /lib/ld-linux.so.2
Hi. I found this behaviour:
$ eatmydata man ls >/dev/null
ERROR: ld.so: object 'libeatmydata.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libeatmydata.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libeatmydata.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libeatmydata.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
$
Experimenting shows that the problem is triggered by having LD_PRELOAD
containing only the library name:
$ faketime yesterday printenv | grep PREL
LD_PRELOAD=libgtk3-nocsd.so.0:/usr/$LIB/faketime/libfaketime.so.1
$ faketime yesterday env LD_PRELOAD=libfaketime.so.1 man ls >/dev/null
ERROR: ld.so: object 'libfaketime.so.1' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libfaketime.so.1' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libfaketime.so.1' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libfaketime.so.1' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libfaketime.so.1' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libfaketime.so.1' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libfaketime.so.1' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libfaketime.so.1' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
$
The problem is not limited to man:
$ faketime yesterday env LD_PRELOAD=libfaketime.so.1 dash -c true
ERROR: ld.so: object 'libfaketime.so.1' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
$
This message on debian-user seems related:
https://lists.debian.org/debian-user/2017/03/msg00335.html
Colin Watson (CC'd) reports that sid works.
Thanks for your attention.
Ian.
-- System Information:
Debian Release: 10.4
APT prefers stable-debug
APT policy: (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armhf
Kernel: Linux 5.6.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
LSM: AppArmor: enabled
Versions of packages libc6:i386 depends on:
ii libgcc1 1:8.3.0-6
Versions of packages libc6:i386 recommends:
ii libidn2-0 2.0.5-1+deb10u1
Versions of packages libc6:i386 suggests:
ii debconf [debconf-2.0] 1.5.71
ii glibc-doc 2.28-10
ii libc-l10n 2.28-10
ii locales 2.28-10
-- debconf information excluded
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