[   1.4050324] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/kern/subr_disk_mbr.c:574:9, member access within misaligned address 0xfffffafc4ba8c03c for type 'const struct disklabel' which requires 8 byte alignment

[   1.4250502] cpu1: Begin traceback...
[   1.4350646] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[   1.4450759] isAlreadyReported() at netbsd:isAlreadyReported
[   1.4650990] HandleTypeMismatch.part.1() at netbsd:HandleTypeMismatch.part.1+0xcc
[   1.4851227] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x7b sys/../common/lib/libc/misc/ubsan.c:408
[   1.4951345] check_label_magic() at netbsd:check_label_magic+0x9f sys/kern/subr_disk_mbr.c:574
[   1.5151605] validate_label() at netbsd:validate_label+0x1b4 sys/kern/subr_disk_mbr.c:626
[   1.5351827] look_netbsd_part() at netbsd:look_netbsd_part+0x3ce sys/kern/subr_disk_mbr.c:526
[   1.5552083] scan_mbr() at netbsd:scan_mbr+0x24a sys/kern/subr_disk_mbr.c:234
[   1.5652186] readdisklabel() at netbsd:readdisklabel+0x412 sys/kern/subr_disk_mbr.c:448
[   1.5852437] dk_getdisklabel() at netbsd:dk_getdisklabel+0x192 sys/dev/dksubr.c:931
[   1.5952545] dk_open() at netbsd:dk_open+0x456 sys/dev/dksubr.c:177
[   1.6152789] sdopen() at netbsd:sdopen+0x114 sys/dev/scsipi/sd.c:543
[   1.6353040] cdev_open() at netbsd:cdev_open+0xe5 sys/kern/subr_devsw.c:871
[   1.6453137] spec_open() at netbsd:spec_open+0x3ad sys/miscfs/specfs/spec_vnops.c:562
[   1.6653377] VOP_OPEN() at netbsd:VOP_OPEN+0x113 sys/kern/vnode_if.c:298
[   1.6753505] dkwedge_discover() at netbsd:dkwedge_discover+0xcf sys/dev/dkwedge/dk.c:931
[   1.6953771] sdattach() at netbsd:sdattach+0x53f sys/dev/scsipi/sd.c:362
[   1.7154037] config_attach_loc() at netbsd:config_attach_loc+0x432 sys/kern/subr_autoconf.c:1604
[   1.7254112] scsi_probe_bus() at netbsd:scsi_probe_bus+0xad8 scsi_probe_device sys/dev/scsipi/scsiconf.c:1035 [inline]
[   1.7254112] scsi_probe_bus() at netbsd:scsi_probe_bus+0xad8 sys/dev/scsipi/scsiconf.c:413
[   1.7454360] scsibus_discover_thread() at netbsd:scsibus_discover_thread+0xdd scsibus_config sys/dev/scsipi/scsiconf.c:320 [inline]
[   1.7454360] scsibus_discover_thread() at netbsd:scsibus_discover_thread+0xdd sys/dev/scsipi/scsiconf.c:285
[   1.7554473] cpu1: End traceback...
[   1.7554473] fatal breakpoint trap in supervisor mode
[   1.7554473] trap type 1 code 0 rip 0xffffffff8021dddd cs 0x8 rflags 0x282 cr2 0 ilevel 0 rsp 0xffffca00a5c02280
[   1.7654544] curlwp 0xfffffafb398ce9c0 pid 0.28 lowest kstack 0xffffca00a5bff2c0
Stopped in pid 0.28 (system) at netbsd:breakpoint+0x5:  leave
db{1}>