Created attachment 1603264 [details]
boot log

1. Please describe the problem:
After upgrading from kernel kernel-5.1.20-300.fc30.armv7hl to kernel-5.2.7-200.fc30.armv7hl on a BeagleBone Black ( https://beagleboard.org/black/ ), I started getting kernel oops that starts with:

[   40.332718] Unable to handle kernel NULL pointer dereference at virtual address 0000001b
[   40.340986] pgd = 8a643b40
[   40.343793] [0000001b] *pgd=00000000
[   40.347443] Internal error: Oops: 5 [#1] SMP ARM

The full log (retrieved using serial console) is attached.

2. What is the Version-Release number of the kernel:
5.2.7-200.fc30.armv7hl

3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :
Yes, it worked previously.
The problem does not occur with 5.1.20-300.fc30.armv7hl.
The problem first occurs with 5.2.1-200.fc30.armv7hl.

4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:
Yes, the issue happens on every boot.

5. Does this problem occur with the latest Rawhide kernel? To install the
   Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
   ``sudo dnf update --enablerepo=rawhide kernel``:
Yes. The problem also occurs with 5.3.0-0.rc3.git1.1.fc31.armv7hl.

6. Are you running any modules that not shipped with directly Fedora's kernel?:
No.

7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.
The system does not boot with the affected kernel, so the only log available is the boot log (attached).