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24.5. Troubleshooting systemd failure to load the IMA policy

If systemd does not load /etc/ima/ima-policy, the system hangs and displays the error systemd[1]: Freezing execution. 

[    5.829882] ima: policy update failed
[    5.830094] ima: signed policy file (specified as an absolute pathname) required
[!!!!!!] Failed to load IMA policy.
…
[    5.859994] systemd[1]: Freezing execution.

There are three methods that you can use to recover your system.

24.5.1. Turn off Secure Boot
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If the policy cannot be loaded because it is not signed, you might see errors similar to the following examples. 

[    5.661906] ima: policy update failed
[    5.662290] ima: signed policy file (specified as an absolute pathname) required
[    5.662496] systemd[1]: Failed to load the IMA custom policy file /etc/ima/ima-policy1: Permission denied
[    5.662663] ima: policy update failed
[    5.662856] audit: type=1800 audit(1744968172.925:7): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 op=appraise_data cause=IMA-signature-required comm="systemd" name="/etc/ima/ima-policy" dev="vda3" ino=25679834 res=0 errno=0
[    5.663205] audit: type=1802 audit(1744968172.925:8): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 op=policy_update cause=failed comm="systemd" res=0 errno=0
[!!!!!!] Failed to load IMA policy.

As a workaround, you can turn off Secure Boot temporarily and follow Deploying a custom signed IMA policy for UEFI systems to fix the issue.

To boot the system with the init=/bin/bash kernel parameter, you can use the following steps.

  1. Modify the bootloader entry and add the init=/bin/bash kernel parameter.

  2. After you access the shell, remount the system with write permissions: 

    # mount -o remount,rw /

  3. Rename /etc/ima/ima-policy to /etc/ima/ima-policy.bak: 

    # mv /etc/ima/ima-policy /etc/ima/ima-policy.bak

  4. Reboot the system: 

    # echo 1 > /proc/sys/kernel/sysrq
# printf "s\nb" > /proc/sysrq-trigger

  5. Resolve any issues in /etc/ima/ima-policy.bak and verify that the policy can be loaded: 

    # echo /etc/ima/ima-policy.bak >> /sys/kernel/security/integrity/ima/policy

  6. Rename /etc/ima/ima-policy.bak to /etc/ima/ima-policy: 

    # mv /etc/ima/ima-policy.bak /etc/ima/ima-policy

If the system hangs with the error systemd[1]: Freezing execution, you can boot the system with the initcall_blacklist=init_ima kernel parameter to disable the IMA policy.

  1. Modify the boot loader entry and add the initcall_blacklist=init_ima kernel parameter.

  2. Rename /etc/ima/ima-policy to /etc/ima/ima-policy.bak: 

    # mv /etc/ima/ima-policy /etc/ima/ima-policy.bak

  3. Reboot the system: 

    # systemctl reboot

  4. Resolve any issues in /etc/ima/ima-policy.bak and verify that the policy can be loaded: 

    # echo /etc/ima/ima-policy.bak >> /sys/kernel/security/integrity/ima/policy

  5. Rename /etc/ima/ima-policy.bak to /etc/ima/ima-policy: 

    # mv /etc/ima/ima-policy.bak /etc/ima/ima-policy
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