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Bug 1884147 - dracut generates broken initramfs images when /etc/ld.so.preload contains a non-existing library
Summary: dracut generates broken initramfs images when /etc/ld.so.preload contains a n...
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: dracut
Version: 7.9
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Lukáš Nykrýn
QA Contact: qe-baseos-daemons
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-10-01 07:53 UTC by Renaud Métrich
Modified: 2023-12-15 19:37 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-12-15 14:31:39 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Renaud Métrich 2020-10-01 07:53:15 UTC 
Description of problem:

When specifying a non-existing library in /etc/ld.so.preload, dracut generates a broken initramfs image, containing everything except a few binaries which are symlinks to other binaries, e.g.:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
lrwxrwxrwx   1 root     root            4 Feb 28  2020 usr/bin/awk -> gawk
lrwxrwxrwx   1 root     root           16 Feb 28  2020 usr/sbin/halt -> ../bin/systemctl
lrwxrwxrwx   1 root     root           11 Feb 28  2020 usr/sbin/ping -> ../bin/ping
lrwxrwxrwx   1 root     root           14 Feb 28  2020 usr/sbin/udevadm -> ../bin/udevadm
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

This prevents the system from booting.


Version-Release number of selected component (if applicable):

dracut from RHEL 7 and RHEL 8


How reproducible:

Always


Steps to Reproduce:
1. Create /etc/ld.so.preload with a non-existing library

  # echo "/lib64/libfoo.so" > /etc/ld.so.preload

2. Build the initramfs

  # dracut /tmp/initramfs.img $(uname -r)

3. Compare with the good one in /boot

  # diff -u /tmp/initramfs.img $(uname -r).img /boot/initramfs-$(uname -r).img

Actual results:

-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
+lrwxrwxrwx   1 root     root            4 Feb 28  2020 usr/bin/awk -> gawk
+lrwxrwxrwx   1 root     root           16 Feb 28  2020 usr/sbin/halt -> ../bin/systemctl
+lrwxrwxrwx   1 root     root           11 Feb 28  2020 usr/sbin/ping -> ../bin/ping
+lrwxrwxrwx   1 root     root           14 Feb 28  2020 usr/sbin/udevadm -> ../bin/udevadm
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

Output may vary.


Expected results:

All files included and symlinks created

Additional info:

Running dracut in debug shows "dracut-install" is failing but reporting success anyway:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
dracut-install: Handle 'ping'
dracut-install: find_binary(ping) == /usr/sbin/ping
dracut-install: find_binary(ping) == /usr/bin/ping
dracut-install: dracut_install '/usr/sbin/ping'
dracut-install: dracut_install('/usr/sbin/ping', '/usr/sbin/ping')
dracut-install: dracut_install('/usr/bin/ping', '/usr/bin/ping')
ERROR: ld.so: object '/lib64/libfoo.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.
dracut-install: ldd: 'ERROR: ld.so: object '/lib64/libfoo.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.
dracut-install: '
dracut-install: dracut_install('/lib64/libfoo.so'', '/lib64/libfoo.so'')
...
dracut-install: cp '/usr/bin/ping' '/var/tmp/dracut.yEP3o0/initramfs/usr/bin/ping'
dracut-install: dracut_install ret = 2
dracut-install: '/usr/bin/ping' install error
dracut-install: dracut_install '/usr/bin/ping'
dracut-install: dracut_install('/usr/bin/ping', '/usr/bin/ping')
dracut-install: hash hit items for '/usr/bin/ping'
dracut-install: dracut_install '/usr/bin/ping' OK
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
Comment 6 RHEL Program Management 2021-12-15 14:31:39 UTC 
Development Management has reviewed and declined this request. You may appeal this decision by reopening this request.
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