[  50.6993888] panic: kernel diagnostic assertion "uvm_page_locked_p(old_pg)" failed: file "/syzkaller/managers/netbsd-kubsan/kernel/sys/arch/x86/x86/pmap.c", line 4377 
[  50.7194139] cpu1: Begin traceback...
[  50.7394547] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[  50.7795314] kern_assert() at netbsd:kern_assert+0x63
[  50.8095832] pmap_enter_ma() at netbsd:pmap_enter_ma+0x1ddb sys/arch/x86/x86/pmap.c:4377
[  50.8496596] pmap_enter_default() at netbsd:pmap_enter_default+0x7a sys/arch/x86/x86/pmap.c:4189
[  50.8997558] uvm_fault_lower_enter() at netbsd:uvm_fault_lower_enter+0x283 sys/uvm/uvm_fault.c:2232
[  50.9398366] uvm_fault_internal() at netbsd:uvm_fault_internal+0x2966 uvm_fault_lower_promote sys/uvm/uvm_fault.c:2190 [inline]
[  50.9398366] uvm_fault_internal() at netbsd:uvm_fault_internal+0x2966 uvm_fault_lower sys/uvm/uvm_fault.c:1742 [inline]
[  50.9398366] uvm_fault_internal() at netbsd:uvm_fault_internal+0x2966 sys/uvm/uvm_fault.c:904
[  50.9799108] trap() at netbsd:trap+0x1215 sys/arch/amd64/amd64/trap.c:534
[  50.9899187] --- trap (number 6) ---
[  50.9899187] Skipping crash dump on recursive panic
[  50.9999362] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:153:24, member access within misaligned address 0xc615 for type 'struct x86_64_frame' which requires 8 byte alignment

[  51.0199762] Faulted in mid-traceback; aborting...
[  51.0299926] fatal breakpoint trap in supervisor mode
[  51.0299926] trap type 1 code 0 rip 0xffffffff8021e7cd cs 0x8 rflags 0x282 cr2 0x20001900 ilevel 0 rsp 0xffffc300b2ca6b80
[  51.0400160] curlwp 0xffffe32ac4e7fa00 pid 688.1 lowest kstack 0xffffc300b2ca42c0
Stopped in pid 688.1 (syz-executor.3) 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
kern_assert() at netbsd:kern_assert+0x63
pmap_enter_ma() at netbsd:pmap_enter_ma+0x1ddb sys/arch/x86/x86/pmap.c:4377
pmap_enter_default() at netbsd:pmap_enter_default+0x7a sys/arch/x86/x86/pmap.c:4189
uvm_fault_lower_enter() at netbsd:uvm_fault_lower_enter+0x283 sys/uvm/uvm_fault.c:2232
uvm_fault_internal() at netbsd:uvm_fault_internal+0x2966 uvm_fault_lower_promote sys/uvm/uvm_fault.c:2190 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x2966 uvm_fault_lower sys/uvm/uvm_fault.c:1742 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x2966 sys/uvm/uvm_fault.c:904
trap() at netbsd:trap+0x1215 sys/arch/amd64/amd64/trap.c:534
--- trap (number 6) ---
[  51.0500292] Skipping crash dump on recursive panic
[  51.0500292] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:154:14, member access within misaligned address 0xc615 for type 'struct x86_64_frame' which requires 8 byte alignment

[  51.0500292] Faulted in mid-traceback; aborting...
[  51.0500292] fatal breakpoint trap in supervisor mode
[  51.0500292] trap type 1 code 0 rip 0xffffffff8021e7cd cs 0x8 rflags 0x282 cr2 0x20001900 ilevel 0x8 rsp 0xffffc300b2ca5880
[  51.0500292] curlwp 0xffffe32ac4e7fa00 pid 688.1 lowest kstack 0xffffc300b2ca42c0
Stopped in pid 688.1 (syz-executor.3) at        netbsd:breakpoint+0x5:  leave