[ 166.3342696] panic: kernel diagnostic assertion "uvm_page_locked_p(pg)" failed: file "/syzkaller/managers/netbsd-kubsan/kernel/sys/arch/x86/x86/pmap.c", line 3526 
[ 166.3519658] cpu0: Begin traceback...
[ 166.3643247] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[ 166.4044065] kern_assert() at netbsd:kern_assert+0x63
[ 166.4444890] pmap_remove_pte() at netbsd:pmap_remove_pte+0x5a7 pmap_remove_pte sys/arch/x86/x86/pmap.c:3526 [inline]
[ 166.4444890] pmap_remove_pte() at netbsd:pmap_remove_pte+0x5a7 sys/arch/x86/x86/pmap.c:3473
[ 166.4945928] pmap_remove() at netbsd:pmap_remove+0x36d pmap_remove_ptes sys/arch/x86/x86/pmap.c:3432 [inline]
[ 166.4945928] pmap_remove() at netbsd:pmap_remove+0x36d sys/arch/x86/x86/pmap.c:3631
[ 166.5346793] uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x7c1 sys/uvm/uvm_map.c:2317
[ 166.5747617] uvmspace_free() at netbsd:uvmspace_free+0x2e8 sys/uvm/uvm_map.c:4304
[ 166.6148398] uvm_proc_exit() at netbsd:uvm_proc_exit+0xf6 sys/uvm/uvm_glue.c:443
[ 166.6549253] exit1() at netbsd:exit1+0x4cb sys/kern/kern_exit.c:332
[ 166.6849844] sys_exit() at netbsd:sys_exit+0xba sys/kern/kern_exit.c:179
[ 166.7350877] syscall() at netbsd:syscall+0x29a sy_call sys/sys/syscallvar.h:65 [inline]
[ 166.7350877] syscall() at netbsd:syscall+0x29a sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 166.7350877] syscall() at netbsd:syscall+0x29a sys/arch/x86/x86/syscall.c:138
[ 166.7451083] --- syscall (number 1) ---
[ 166.7584765] Skipping crash dump on recursive panic
[ 166.7584765] 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

[ 166.7848561] Faulted in mid-traceback; aborting...
[ 166.7897089] fatal breakpoint trap in supervisor mode
[ 166.7897089] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x60b2a0 ilevel 0 rsp 0xffff8080b408cda0
[ 166.8060172] curlwp 0xffffaf3733fee9a0 pid 3678.1 lowest kstack 0xffff8080b408a2c0
Stopped in pid 3678.1 (syz-executor.4) 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_remove_pte() at netbsd:pmap_remove_pte+0x5a7 pmap_remove_pte sys/arch/x86/x86/pmap.c:3526 [inline]
pmap_remove_pte() at netbsd:pmap_remove_pte+0x5a7 sys/arch/x86/x86/pmap.c:3473
pmap_remove() at netbsd:pmap_remove+0x36d pmap_remove_ptes sys/arch/x86/x86/pmap.c:3432 [inline]
pmap_remove() at netbsd:pmap_remove+0x36d sys/arch/x86/x86/pmap.c:3631
uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x7c1 sys/uvm/uvm_map.c:2317
uvmspace_free() at netbsd:uvmspace_free+0x2e8 sys/uvm/uvm_map.c:4304
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:332
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) ---
[ 166.8060172] Skipping crash dump on recursive panic
[ 166.8060172] 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

[ 166.8060172] Faulted in mid-traceback; aborting...
[ 166.8060172] fatal breakpoint trap in supervisor mode
[ 166.8060172] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x60b2a0 ilevel 0x8 rsp 0xffff8080b408baa0
[ 166.8060172] curlwp 0xffffaf3733fee9a0 pid 3678.1 lowest kstack 0xffff8080b408a2c0
Stopped in pid 3678.1 (syz-executor.4) at       netbsd:breakpoint+0x5:  leave