[  67.2930315] panic: kernel diagnostic assertion "uvm_page_locked_p(old_pg)" failed: file "/syzkaller/managers/netbsd-kubsan/kernel/sys/arch/x86/x86/pmap.c", line 4351 
[  67.3030328] cpu1: Begin traceback...
[  67.3230499] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[  67.3630847] kern_assert() at netbsd:kern_assert+0x63
[  67.4031147] pmap_enter_ma() at netbsd:pmap_enter_ma+0x1f10 sys/arch/x86/x86/pmap.c:4351
[  67.4431488] pmap_enter_default() at netbsd:pmap_enter_default+0x7a sys/arch/x86/x86/pmap.c:4168
[  67.4931854] uvm_fault_lower_enter() at netbsd:uvm_fault_lower_enter+0x283 sys/uvm/uvm_fault.c:2253
[  67.5332182] uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd uvm_fault_lower_promote sys/uvm/uvm_fault.c:2211 [inline]
[  67.5332182] uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd uvm_fault_lower sys/uvm/uvm_fault.c:1759 [inline]
[  67.5332182] uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd sys/uvm/uvm_fault.c:915
[  67.5732469] trap() at netbsd:trap+0x1195 sys/arch/amd64/amd64/trap.c:534
[  67.5832558] --- trap (number 6) ---
[  67.5932611] Skipping crash dump on recursive panic
[  67.5932611] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:153:24, member access within misaligned address 0x106e1 for type 'struct x86_64_frame' which requires 8 byte alignment

[  67.6132771] Faulted in mid-traceback; aborting...
[  67.6232839] fatal breakpoint trap in supervisor mode
[  67.6232839] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x20001380 ilevel 0 rsp 0xffffd980b2e1fba0
[  67.6332962] curlwp 0xffff8a48c2b0c100 pid 1011.1 lowest kstack 0xffffd980b2e1d2c0
Stopped in pid 1011.1 (syz-executor.2) at       netbsd:breakpoint+0x5:  leave
?
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0x109 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+0xa3 x86_curcpu sys/arch/amd64/compile/obj/GENERIC_SYZKALLER/./machine/cpu.h:67 [inline]
db_panic() at netbsd:db_panic+0xa3 sys/ddb/db_panic.c:57
vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
kern_assert() at netbsd:kern_assert+0x63
pmap_enter_ma() at netbsd:pmap_enter_ma+0x1f10 sys/arch/x86/x86/pmap.c:4351
pmap_enter_default() at netbsd:pmap_enter_default+0x7a sys/arch/x86/x86/pmap.c:4168
uvm_fault_lower_enter() at netbsd:uvm_fault_lower_enter+0x283 sys/uvm/uvm_fault.c:2253
uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd uvm_fault_lower_promote sys/uvm/uvm_fault.c:2211 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd uvm_fault_lower sys/uvm/uvm_fault.c:1759 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd sys/uvm/uvm_fault.c:915
trap() at netbsd:trap+0x1195 sys/arch/amd64/amd64/trap.c:534
--- trap (number 6) ---
[  67.6433022] Skipping crash dump on recursive panic
[  67.6433022] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:154:14, member access within misaligned address 0x106e1 for type 'struct x86_64_frame' which requires 8 byte alignment

[  67.6433022] Faulted in mid-traceback; aborting...
[  67.6433022] fatal breakpoint trap in supervisor mode
[  67.6433022] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x20001380 ilevel 0x8 rsp 0xffffd980b2e1e8a0
[  67.6433022] curlwp 0xffff8a48c2b0c100 pid 1011.1 lowest kstack 0xffffd980b2e1d2c0
Stopped in pid 1011.1 (syz-executor.2) at       netbsd:breakpoint+0x5:  leave