[  50.0469643] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/machdep.c:625:5, pointer expression with base 0 overflowed to 0xfffffffffffffc68

[  50.0469643] cpu0: Begin traceback...
[  50.0692108] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[  50.1137254] isAlreadyReported() at netbsd:isAlreadyReported
[  50.1693684] HandlePointerOverflow() at netbsd:HandlePointerOverflow+0xf7 sys/../common/lib/libc/misc/ubsan.c:693
[  50.2138803] sendsig_siginfo() at netbsd:sendsig_siginfo+0x872 sys/arch/amd64/amd64/machdep.c:625
[  50.2472730] sendsig() at netbsd:sendsig+0x116 sys/kern/kern_sig.c:2163
[  50.2918261] trapsignal() at netbsd:trapsignal+0xb11 sys/kern/kern_sig.c:972
[  50.3362957] trap() at netbsd:trap+0x156e sys/arch/amd64/amd64/trap.c:665
[  50.3474232] --- trap (number 6) ---
[  50.3474232] Skipping crash dump on recursive panic
[  50.3608625] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:153:24, member access within misaligned address 0x2 for type 'struct x86_64_frame' which requires 8 byte alignment

[  50.3844003] Faulted in mid-traceback; aborting...
[  50.3844003] fatal breakpoint trap in supervisor mode
[  50.3932669] trap type 1 code 0 rip 0xffffffff8021e7cd cs 0x8 rflags 0x282 cr2 0x80 ilevel 0 rsp 0xffffb880b2c26690
[  50.4068833] curlwp 0xffff9015a55640e0 pid 667.3 lowest kstack 0xffffb880b2c242c0
Stopped in pid 667.3 (syz-executor.2) at        netbsd:breakpoint+0x5:  leave
?
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0xd1 sys/ddb/db_panic.c:67
vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
isAlreadyReported() at netbsd:isAlreadyReported
HandleTypeMismatch.part.1() at netbsd:HandleTypeMismatch.part.1+0xcc
HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x7b sys/../common/lib/libc/misc/ubsan.c:408
db_nextframe() at netbsd:db_nextframe+0x6f6 sys/arch/amd64/amd64/db_machdep.c:153
db_stack_trace_print() at netbsd:db_stack_trace_print+0x2c4 sys/arch/x86/x86/db_trace.c:277
db_panic() at netbsd:db_panic+0x8b x86_curcpu sys/arch/amd64/compile/obj/GENERIC_SYZKALLER/./machine/cpu.h:56 [inline]
db_panic() at netbsd:db_panic+0x8b sys/ddb/db_panic.c:57
vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
isAlreadyReported() at netbsd:isAlreadyReported
HandlePointerOverflow() at netbsd:HandlePointerOverflow+0xf7 sys/../common/lib/libc/misc/ubsan.c:693
sendsig_siginfo() at netbsd:sendsig_siginfo+0x872 sys/arch/amd64/amd64/machdep.c:625
sendsig() at netbsd:sendsig+0x116 sys/kern/kern_sig.c:2163
trapsignal() at netbsd:trapsignal+0xb11 sys/kern/kern_sig.c:972
trap() at netbsd:trap+0x156e sys/arch/amd64/amd64/trap.c:665
--- trap (number 6) ---
[  50.4151943] Skipping crash dump on recursive panic
[  50.4151943] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:154:14, member access within misaligned address 0x2 for type 'struct x86_64_frame' which requires 8 byte alignment

[  50.4151943] Faulted in mid-traceback; aborting...
[  50.4151943] fatal breakpoint trap in supervisor mode
[  50.4151943] trap type 1 code 0 rip 0xffffffff8021e7cd cs 0x8 rflags 0x282 cr2 0x80 ilevel 0x8 rsp 0xffffb880b2c25390
[  50.4151943] curlwp 0xffff9015a55640e0 pid 667.3 lowest kstack 0xffffb880b2c242c0
Stopped in pid 667.3 (syz-executor.2) at        netbsd:breakpoint+0x5:  leave