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The assertion failure comes from qemu, so I'll move the bug to qemu.
For the sake of the qemu team please ideally attach a backtrace of all threads from the crash of the qemu process and the debug log of libvirtd/virtqemud to see the QMP communication.
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 (Moderate: qemu-kvm security, bug fix, and enhancement update), 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/RHSA-2023:2162
Description of problem: guest with tpm crashed when executing memory dump to kdump-zlib_format Version-Release number of selected component (if applicable): libvirt-8.5.0-5.el9 qemu-kvm-7.0.0-8.el9 How reproducible: 100% Steps to Reproduce: 1. start a vm with tpm device ... <tpm model='tpm-crb'> <backend type='emulator' version='2.0'/> </tpm> ... 2. memory dump # virsh dump rhel9 /var/tmp/vm.core --memory-only --format kdump-zlib Actual results: error: Failed to core dump domain 'rhel9' to /var/tmp/vm.core error: operation failed: domain is not running Expected results: dump success and vm should not crash. Additional info: # virsh domstate rhel9 --reason shut off (crashed) # cat rhel9.log ...... qemu-kvm: ../dump/dump.c:1162: _Bool get_next_page(GuestPhysBlock **, uint64_t *, uint8_t **, DumpState *): Assertion `(block->target_start & ~target_page_mask) == 0' failed. 2022-08-23 03:43:00.237+0000: shutting down, reason=crashed ......