When I boot a system based on 13.1-RELEASE with a debug kernel, it instapanics while probing PCI devices. The panic happens early in the boot, before any RC scripts are run. So it's independent of my system configuration, and also I can't get a core dump. Here is the stack trace printed to the serial console panic: general protection fault cpuid = 0 time = 1 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xffffffff82f3b580 vpanic() at vpanic+0x17f/frame 0xffffffff82f3b5d0 panic() at panic+0x43/frame 0xffffffff82f3b630 trap_fatal() at trap_fatal+0x385/frame 0xffffffff82f3b690 calltrap() at calltrap+0x8/frame 0xffffffff82f3b690 --- trap 0x9, rip = 0xffffffff80c757e0, rsp = 0xffffffff82f3b760, rbp = 0xffffffff82f3b7b0 --- taskqgroup_attach() at taskqgroup_attach+0x150/frame 0xffffffff82f3b7b0 bnxt_attach_pre() at bnxt_attach_pre+0x78c/frame 0xffffffff82f3b820 iflib_device_register() at iflib_device_register+0x134/frame 0xffffffff82f3b8b0 iflib_device_attach() at iflib_device_attach+0xb5/frame 0xffffffff82f3b8e0 device_attach() at device_attach+0x3c1/frame 0xffffffff82f3b920 device_probe_and_attach() at device_probe_and_attach+0x70/frame 0xffffffff82f3b950 bus_generic_attach() at bus_generic_attach+0x18/frame 0xffffffff82f3b970 pci_attach() at pci_attach+0xe0/frame 0xffffffff82f3b9b0 acpi_pci_attach() at acpi_pci_attach+0x19/frame 0xffffffff82f3ba00 device_attach() at device_attach+0x3c1/frame 0xffffffff82f3ba40 device_probe_and_attach() at device_probe_and_attach+0x70/frame 0xffffffff82f3ba70 bus_generic_attach() at bus_generic_attach+0x18/frame 0xffffffff82f3ba90 acpi_pcib_pci_attach() at acpi_pcib_pci_attach+0xa0/frame 0xffffffff82f3bad0 device_attach() at device_attach+0x3c1/frame 0xffffffff82f3bb10 device_probe_and_attach() at device_probe_and_attach+0x70/frame 0xffffffff82f3bb40 bus_generic_attach() at bus_generic_attach+0x18/frame 0xffffffff82f3bb60 pci_attach() at pci_attach+0xe0/frame 0xffffffff82f3bba0 acpi_pci_attach() at acpi_pci_attach+0x19/frame 0xffffffff82f3bbf0 device_attach() at device_attach+0x3c1/frame 0xffffffff82f3bc30 device_probe_and_attach() at device_probe_and_attach+0x70/frame 0xffffffff82f3bc60 bus_generic_attach() at bus_generic_attach+0x18/frame 0xffffffff82f3bc80 acpi_pcib_acpi_attach() at acpi_pcib_acpi_attach+0x42d/frame 0xffffffff82f3bce0 device_attach() at device_attach+0x3c1/frame 0xffffffff82f3bd20 device_probe_and_attach() at device_probe_and_attach+0x70/frame 0xffffffff82f3bd50 bus_generic_attach() at bus_generic_attach+0x18/frame 0xffffffff82f3bd70 acpi_probe_children() at acpi_probe_children+0x207/frame 0xffffffff82f3bdd0 acpi_attach() at acpi_attach+0x9a6/frame 0xffffffff82f3be60 device_attach() at device_attach+0x3c1/frame 0xffffffff82f3bea0 device_probe_and_attach() at device_probe_and_attach+0x70/frame 0xffffffff82f3bed0 bus_generic_attach() at bus_generic_attach+0x18/frame 0xffffffff82f3bef0 device_attach() at device_attach+0x3c1/frame 0xffffffff82f3bf30 device_probe_and_attach() at device_probe_and_attach+0x70/frame 0xffffffff82f3bf60 bus_generic_new_pass() at bus_generic_new_pass+0xed/frame 0xffffffff82f3bf90 bus_set_pass() at bus_set_pass+0x46/frame 0xffffffff82f3bfc0 configure() at configure+0x9/frame 0xffffffff82f3bfd0 mi_startup() at mi_startup+0xdc/frame 0xffffffff82f3bff0 btext() at btext+0x22
13.1 is going EoL soon. but: what's the chance any of that code has been touched between 13.1 and 13.2 (or, now)
dumpdev works if set via loader.conf or loader prompt, e.g.: dumpdev=/dev/ada0s1b