[  38.0787099] panic: kernel diagnostic assertion "uvm_page_locked_p(old_pg)" failed: file "/syzkaller/managers/netbsd-kubsan/kernel/sys/arch/x86/x86/pmap.c", line 4349 
[  38.0950963] cpu1: Begin traceback...
[  38.1138413] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[  38.1513341] bootinfo_add.cold.1() at netbsd:bootinfo_add.cold.1
[  38.1888267] pmap_enter_ma() at netbsd:pmap_enter_ma+0x212e sys/arch/x86/x86/pmap.c:4349
[  38.2263163] pmap_enter_default() at netbsd:pmap_enter_default+0x7a sys/arch/x86/x86/pmap.c:4163
[  38.2708358] uvm_fault_lower_enter() at netbsd:uvm_fault_lower_enter+0x283 sys/uvm/uvm_fault.c:2271
[  38.3153597] uvm_fault_internal() at netbsd:uvm_fault_internal+0x2a32 uvm_fault_lower_promote sys/uvm/uvm_fault.c:2229 [inline]
[  38.3153597] uvm_fault_internal() at netbsd:uvm_fault_internal+0x2a32 uvm_fault_lower sys/uvm/uvm_fault.c:1771 [inline]
[  38.3153597] uvm_fault_internal() at netbsd:uvm_fault_internal+0x2a32 sys/uvm/uvm_fault.c:923
[  38.3528492] trap() at netbsd:trap+0x1215 sys/arch/amd64/amd64/trap.c:534
[  38.3622194] --- trap (number 6) ---
[  38.3669068] Skipping crash dump on recursive panic
[  38.3715949] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:153:24, member access within misaligned address 0x94bf for type 'struct x86_64_frame' which requires 8 byte alignment

[  38.3997140] Faulted in mid-traceback; aborting...
[  38.4044024] fatal breakpoint trap in supervisor mode
[  38.4090836] trap type 1 code 0 rip 0xffffffff80221a9d cs 0x8 rflags 0x286 cr2 0x20001f00 ilevel 0 rsp 0xffffbb00b3aa5b50
[  38.4231457] curlwp 0xffffe7a7721cb9e0 pid 747.1 lowest kstack 0xffffbb00b3aa32c0
Stopped in pid 747.1 (syz-executor.4) 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
bootinfo_add.cold.1() at netbsd:bootinfo_add.cold.1
pmap_enter_ma() at netbsd:pmap_enter_ma+0x212e sys/arch/x86/x86/pmap.c:4349
pmap_enter_default() at netbsd:pmap_enter_default+0x7a sys/arch/x86/x86/pmap.c:4163
uvm_fault_lower_enter() at netbsd:uvm_fault_lower_enter+0x283 sys/uvm/uvm_fault.c:2271
uvm_fault_internal() at netbsd:uvm_fault_internal+0x2a32 uvm_fault_lower_promote sys/uvm/uvm_fault.c:2229 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x2a32 uvm_fault_lower sys/uvm/uvm_fault.c:1771 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x2a32 sys/uvm/uvm_fault.c:923
trap() at netbsd:trap+0x1215 sys/arch/amd64/amd64/trap.c:534
--- trap (number 6) ---
[  38.4348598] Skipping crash dump on recursive panic
[  38.4348598] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:154:14, member access within misaligned address 0x94bf for type 'struct x86_64_frame' which requires 8 byte alignment

[  38.4348598] Faulted in mid-traceback; aborting...
[  38.4348598] fatal breakpoint trap in supervisor mode
[  38.4348598] trap type 1 code 0 rip 0xffffffff80221a9d cs 0x8 rflags 0x286 cr2 0x20001f00 ilevel 0x8 rsp 0xffffbb00b3aa4850
[  38.4348598] curlwp 0xffffe7a7721cb9e0 pid 747.1 lowest kstack 0xffffbb00b3aa32c0
Stopped in pid 747.1 (syz-executor.4) at        netbsd:breakpoint+0x5:  leave