[  49.1029017] panic: kernel diagnostic assertion "uvm_page_locked_p(pg)" failed: file "/syzkaller/managers/netbsd-kubsan/kernel/sys/arch/x86/x86/pmap.c", line 3521 
[  49.1208087] cpu0: Begin traceback...
[  49.1319566] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[  49.1766061] kern_assert() at netbsd:kern_assert+0x63
[  49.2212468] pmap_remove_pte() at netbsd:pmap_remove_pte+0x5cf pmap_remove_pte sys/arch/x86/x86/pmap.c:3521 [inline]
[  49.2212468] pmap_remove_pte() at netbsd:pmap_remove_pte+0x5cf sys/arch/x86/x86/pmap.c:3468
[  49.2658940] pmap_remove() at netbsd:pmap_remove+0x31d pmap_remove_ptes sys/arch/x86/x86/pmap.c:3427 [inline]
[  49.2658940] pmap_remove() at netbsd:pmap_remove+0x31d sys/arch/x86/x86/pmap.c:3626
[  49.2993817] uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x7be sys/uvm/uvm_map.c:2317
[  49.3440282] uvmspace_free() at netbsd:uvmspace_free+0x2e8 sys/uvm/uvm_map.c:4301
[  49.3775140] uvm_proc_exit() at netbsd:uvm_proc_exit+0xf6 sys/uvm/uvm_glue.c:443
[  49.4221624] exit1() at netbsd:exit1+0x4cb sys/kern/kern_exit.c:333
[  49.4556444] sys_exit() at netbsd:sys_exit+0xba sys/kern/kern_exit.c:179
[  49.5002936] syscall() at netbsd:syscall+0x29a sy_call sys/sys/syscallvar.h:65 [inline]
[  49.5002936] syscall() at netbsd:syscall+0x29a sy_invoke sys/sys/syscallvar.h:94 [inline]
[  49.5002936] syscall() at netbsd:syscall+0x29a sys/arch/x86/x86/syscall.c:138
[  49.5232686] --- syscall (number 1) ---
[  49.5232686] Skipping crash dump on recursive panic
[  49.5343902] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:153:24, member access within misaligned address 0xffffffff for type 'struct x86_64_frame' which requires 8 byte alignment

[  49.5606433] Faulted in mid-traceback; aborting...
[  49.5606433] fatal breakpoint trap in supervisor mode
[  49.5698087] trap type 1 code 0 rip 0xffffffff8021dd9d cs 0x8 rflags 0x286 cr2 0x60b2a0 ilevel 0 rsp 0xffffc380af80bda0
[  49.5837853] curlwp 0xffffc006b96f54c0 pid 587.1 lowest kstack 0xffffc380af8092c0
Stopped in pid 587.1 (syz-executor.0) 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_remove_pte() at netbsd:pmap_remove_pte+0x5cf pmap_remove_pte sys/arch/x86/x86/pmap.c:3521 [inline]
pmap_remove_pte() at netbsd:pmap_remove_pte+0x5cf sys/arch/x86/x86/pmap.c:3468
pmap_remove() at netbsd:pmap_remove+0x31d pmap_remove_ptes sys/arch/x86/x86/pmap.c:3427 [inline]
pmap_remove() at netbsd:pmap_remove+0x31d sys/arch/x86/x86/pmap.c:3626
uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x7be sys/uvm/uvm_map.c:2317
uvmspace_free() at netbsd:uvmspace_free+0x2e8 sys/uvm/uvm_map.c:4301
uvm_proc_exit() at netbsd:uvm_proc_exit+0xf6 sys/uvm/uvm_glue.c:443
exit1() at netbsd:exit1+0x4cb sys/kern/kern_exit.c:333
sys_exit() at netbsd:sys_exit+0xba sys/kern/kern_exit.c:179
syscall() at netbsd:syscall+0x29a sy_call sys/sys/syscallvar.h:65 [inline]
syscall() at netbsd:syscall+0x29a sy_invoke sys/sys/syscallvar.h:94 [inline]
syscall() at netbsd:syscall+0x29a sys/arch/x86/x86/syscall.c:138
--- syscall (number 1) ---
[  49.5919850] Skipping crash dump on recursive panic
[  49.5919850] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:154:14, member access within misaligned address 0xffffffff for type 'struct x86_64_frame' which requires 8 byte alignment

[  49.5919850] Faulted in mid-traceback; aborting...
[  49.5919850] fatal breakpoint trap in supervisor mode
[  49.5919850] trap type 1 code 0 rip 0xffffffff8021dd9d cs 0x8 rflags 0x286 cr2 0x60b2a0 ilevel 0x8 rsp 0xffffc380af80aaa0
[  49.5919850] curlwp 0xffffc006b96f54c0 pid 587.1 lowest kstack 0xffffc380af8092c0
Stopped in pid 587.1 (syz-executor.0) at        netbsd:breakpoint+0x5:  leave