[   1.3734241] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/kern/subr_disk_mbr.c:574:9, member access within misaligned address 0xffffaf1ec868c03c for type 'const struct disklabel' which requires 8 byte alignment

[   1.3917220] cpu0: Begin traceback...
[   1.3943295] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[   1.4128432] isAlreadyReported() at netbsd:isAlreadyReported
[   1.4328767] HandleTypeMismatch.part.1() at netbsd:HandleTypeMismatch.part.1+0xcc
[   1.4428946] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x7b sys/../common/lib/libc/misc/ubsan.c:408
[   1.4629295] check_label_magic() at netbsd:check_label_magic+0x9f sys/kern/subr_disk_mbr.c:574
[   1.4729456] validate_label() at netbsd:validate_label+0x1b4 sys/kern/subr_disk_mbr.c:626
[   1.4929801] look_netbsd_part() at netbsd:look_netbsd_part+0x3ce sys/kern/subr_disk_mbr.c:526
[   1.5029968] scan_mbr() at netbsd:scan_mbr+0x24a sys/kern/subr_disk_mbr.c:234
[   1.5230325] readdisklabel() at netbsd:readdisklabel+0x412 sys/kern/subr_disk_mbr.c:448
[   1.5330482] dk_getdisklabel() at netbsd:dk_getdisklabel+0x192 sys/dev/dksubr.c:931
[   1.5530820] dk_open() at netbsd:dk_open+0x456 sys/dev/dksubr.c:177
[   1.5631007] sdopen() at netbsd:sdopen+0x114 sys/dev/scsipi/sd.c:543
[   1.5732398] cdev_open() at netbsd:cdev_open+0xe5 sys/kern/subr_devsw.c:871
[   1.5931517] spec_open() at netbsd:spec_open+0x3ad sys/miscfs/specfs/spec_vnops.c:562
[   1.6031682] VOP_OPEN() at netbsd:VOP_OPEN+0x113 sys/kern/vnode_if.c:298
[   1.6232021] dkwedge_discover() at netbsd:dkwedge_discover+0xcf sys/dev/dkwedge/dk.c:931
[   1.6332206] sdattach() at netbsd:sdattach+0x53f sys/dev/scsipi/sd.c:362
[   1.6532536] config_attach_loc() at netbsd:config_attach_loc+0x432 sys/kern/subr_autoconf.c:1604
[   1.6632703] scsi_probe_bus() at netbsd:scsi_probe_bus+0xad8 scsi_probe_device sys/dev/scsipi/scsiconf.c:1035 [inline]
[   1.6632703] scsi_probe_bus() at netbsd:scsi_probe_bus+0xad8 sys/dev/scsipi/scsiconf.c:413
[   1.6733681] scsibus_discover_thread() at netbsd:scsibus_discover_thread+0xdd scsibus_config sys/dev/scsipi/scsiconf.c:320 [inline]
[   1.6733681] scsibus_discover_thread() at netbsd:scsibus_discover_thread+0xdd sys/dev/scsipi/scsiconf.c:285
[   1.6852734] cpu0: End traceback...
[   1.6852734] fatal breakpoint trap in supervisor mode
[   1.6947021] trap type 1 code 0 rip 0xffffffff8021dddd cs 0x8 rflags 0x282 cr2 0 ilevel 0 rsp 0xffffc000a5c02280
[   1.6947021] curlwp 0xffffaf1db64ce9c0 pid 0.28 lowest kstack 0xffffc000a5bff2c0
Stopped in pid 0.28 (system) at netbsd:breakpoint+0x5:  leave
db{0}>