[ 108.8058953] panic: kernel diagnostic assertion "pg->offset >= nextoff" failed: file "/syzkaller/managers/netbsd-kubsan/kernel/sys/miscfs/genfs/genfs_io.c", line 972 
[ 108.8221599] cpu0: Begin traceback...
[ 108.8459019] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[ 108.8959117] kern_assert() at netbsd:kern_assert+0x63
[ 108.9459101] genfs_do_putpages() at netbsd:genfs_do_putpages+0xbfb sys/miscfs/genfs/genfs_io.c:972
[ 109.0059173] VOP_PUTPAGES() at netbsd:VOP_PUTPAGES+0x112 sys/kern/vnode_if.c:1632
[ 109.0559291] ffs_write() at netbsd:ffs_write+0xd08 sys/ufs/ufs/ufs_readwrite.c:342
[ 109.1059323] VOP_WRITE() at netbsd:VOP_WRITE+0x108 sys/kern/vnode_if.c:506
[ 109.1759440] vn_write() at netbsd:vn_write+0x277 sys/kern/vfs_vnops.c:609
[ 109.2359514] do_filewritev.part.1() at netbsd:do_filewritev.part.1+0x415
[ 109.2859628] sys_writev() at netbsd:sys_writev+0x54 do_filewritev sys/kern/sys_generic.c:381 [inline]
[ 109.2859628] sys_writev() at netbsd:sys_writev+0x54 sys/kern/sys_generic.c:381
[ 109.3359688] sys___syscall() at netbsd:sys___syscall+0x1c8 sy_call sys/sys/syscallvar.h:65 [inline]
[ 109.3359688] sys___syscall() at netbsd:sys___syscall+0x1c8 sys/kern/sys_syscall.c:77
[ 109.3959751] syscall() at netbsd:syscall+0x29a sy_call sys/sys/syscallvar.h:65 [inline]
[ 109.3959751] syscall() at netbsd:syscall+0x29a sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 109.3959751] syscall() at netbsd:syscall+0x29a sys/arch/x86/x86/syscall.c:138
[ 109.4159779] --- syscall (number 198) ---
[ 109.4159779] Skipping crash dump on recursive panic
[ 109.4309336] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:153:24, member access within misaligned address 0x3 for type 'struct x86_64_frame' which requires 8 byte alignment

[ 109.4519420] Faulted in mid-traceback; aborting...
[ 109.4569197] fatal breakpoint trap in supervisor mode
[ 109.4569197] trap type 1 code 0 rip 0xffffffff8021dd9d cs 0x8 rflags 0x286 cr2 0x20000140 ilevel 0 rsp 0xffff9280b2ce6b10
[ 109.4727051] curlwp 0xffff8b46cbb1ea60 pid 623.4 lowest kstack 0xffff9280b2ce42c0
Stopped in pid 623.4 (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
genfs_do_putpages() at netbsd:genfs_do_putpages+0xbfb sys/miscfs/genfs/genfs_io.c:972
VOP_PUTPAGES() at netbsd:VOP_PUTPAGES+0x112 sys/kern/vnode_if.c:1632
ffs_write() at netbsd:ffs_write+0xd08 sys/ufs/ufs/ufs_readwrite.c:342
VOP_WRITE() at netbsd:VOP_WRITE+0x108 sys/kern/vnode_if.c:506
vn_write() at netbsd:vn_write+0x277 sys/kern/vfs_vnops.c:609
do_filewritev.part.1() at netbsd:do_filewritev.part.1+0x415
sys_writev() at netbsd:sys_writev+0x54 do_filewritev sys/kern/sys_generic.c:381 [inline]
sys_writev() at netbsd:sys_writev+0x54 sys/kern/sys_generic.c:381
sys___syscall() at netbsd:sys___syscall+0x1c8 sy_call sys/sys/syscallvar.h:65 [inline]
sys___syscall() at netbsd:sys___syscall+0x1c8 sys/kern/sys_syscall.c:77
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 198) ---
[ 109.4800719] Skipping crash dump on recursive panic
[ 109.4800719] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:154:14, member access within misaligned address 0x3 for type 'struct x86_64_frame' which requires 8 byte alignment

[ 109.4800719] Faulted in mid-traceback; aborting...
[ 109.4800719] fatal breakpoint trap in supervisor mode
[ 109.4800719] trap type 1 code 0 rip 0xffffffff8021dd9d cs 0x8 rflags 0x286 cr2 0x20000140 ilevel 0x8 rsp 0xffff9280b2ce5810
[ 109.4800719] curlwp 0xffff8b46cbb1ea60 pid 623.4 lowest kstack 0xffff9280b2ce42c0
Stopped in pid 623.4 (syz-executor.0) at        netbsd:breakpoint+0x5:  leave