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Description of problem:
When booting a system with / and /boot on iSCSI, mounting /boot early in the initramfs ("x-initrd.mount") and enabling FIPS, the system cannot boot because fips.sh doesn't find the .hmac file for the kernel.
Additionally, 20 seconds are lost during boot because pre-trigger "01-fips-boot.sh" tries to mount "/boot" but at this step, there is no network and no iscsi yet.
Version-Release number of selected component (if applicable):
dracut-fips-033-535.el7_5.1.x86_64
How reproducible:
Always
Steps to Reproduce:
1. Install a VM with disk on iSCSI
2. Configure "x-initrd.mount" for "/boot"
3. Enable fips
Actual results:
...
[ OK ] Mounted /sysroot/boot.
...
[ 28.860906] dracut-pre-pivot[801]: mount: /dev/sdb is already mounted or /boot busy
[ 28.864732] dracut-pre-pivot[801]: /dev/sdb is already mounted on /sysroot/boot
...
[ 30.399698] dracut: FATAL: FIPS integrity test failed
[ 29.706306] dracut-pre-pivot[801]: Warning: /boot/.vmlinuz-3.10.0-862.14.4.el7.x86_64.hmac does not exist
[ 30.403843] dracut: Refusing to continue
The root cause is 01-fips-noboot.sh runs in "pre-pivot", which happens after "systemd-mount.service" was executed.
Due to having "x-initrd.mount" for "/boot", systemd mounts the partition to "/sysroot/boot".
Then in pre-pivot, 01-fips-noboot.sh mounts the partition to "/boot" which fails since it is already mounted on "/sysroot/boot".
The 20 seconds delay booting is also problematic. This is due to running 01-fips-boot.sh in "pre-trigger".
I don't understand why FIPS check runs at this step, I do not see any reason for that.
Moving the check to "pre-mount" instead fixes all the issues:
- no delay anymore since devices are now present
- mount of "/boot" happens before systemd does the mounts under /sysroot/ hierarchy
Proposed patch:
# diff -u $PWD/module-setup.sh $PWD/module-setup.sh.new
--- /lib/dracut/modules.d/01fips/module-setup.sh 2018-06-13 10:15:23.000000000 +0200
+++ /lib/dracut/modules.d/01fips/module-setup.sh.new 2018-10-19 12:22:21.887000000 +0200
@@ -40,7 +40,7 @@
install() {
local _dir
- inst_hook pre-trigger 01 "$moddir/fips-boot.sh"
+ inst_hook pre-mount 01 "$moddir/fips-boot.sh"
inst_hook pre-pivot 01 "$moddir/fips-noboot.sh"
inst_script "$moddir/fips.sh" /sbin/fips.sh
Same needs to be done Upstream.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2019:2289
Description of problem: When booting a system with / and /boot on iSCSI, mounting /boot early in the initramfs ("x-initrd.mount") and enabling FIPS, the system cannot boot because fips.sh doesn't find the .hmac file for the kernel. Additionally, 20 seconds are lost during boot because pre-trigger "01-fips-boot.sh" tries to mount "/boot" but at this step, there is no network and no iscsi yet. Version-Release number of selected component (if applicable): dracut-fips-033-535.el7_5.1.x86_64 How reproducible: Always Steps to Reproduce: 1. Install a VM with disk on iSCSI 2. Configure "x-initrd.mount" for "/boot" 3. Enable fips Actual results: ... [ OK ] Mounted /sysroot/boot. ... [ 28.860906] dracut-pre-pivot[801]: mount: /dev/sdb is already mounted or /boot busy [ 28.864732] dracut-pre-pivot[801]: /dev/sdb is already mounted on /sysroot/boot ... [ 30.399698] dracut: FATAL: FIPS integrity test failed [ 29.706306] dracut-pre-pivot[801]: Warning: /boot/.vmlinuz-3.10.0-862.14.4.el7.x86_64.hmac does not exist [ 30.403843] dracut: Refusing to continue