[  85.0066883] panic: cpu0: softints stuck for 16 seconds
[  85.0066883] cpu1: found cpu0 heart stopped beating after 16 seconds
[  85.0066883] cpu0: Begin traceback...
[  85.0066883] vpanic() at netbsd:vpanic+0x2f0 sys/kern/subr_prf.c:288
[  85.0066883] usb4 at vhci4: USB revision 2.0
[  85.0066883] uhub4 at usb4: NetBSD (0x0000) VHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
[  85.0066883] panic() at netbsd:panic+0x49 sys/kern/subr_prf.c:1116
[  85.0066883] heartbeat() at netbsd:heartbeat+0x7c3 select_patient sys/kern/kern_heartbeat.c:549 [inline]
[  85.0066883] heartbeat() at netbsd:heartbeat+0x7c3 sys/kern/kern_heartbeat.c:706
[  85.0066883] hardclock() at netbsd:hardclock+0x1d9 sys/kern/kern_clock.c:348
[  85.0066883] Xresume_lapic_ltimer() at netbsd:Xresume_lapic_ltimer+0x1e
[  85.0066883] --- interrupt ---
[  85.0066883] _kernel_lock() at netbsd:_kernel_lock+0x46d __SIMPLELOCK_LOCKED_P sys/arch/amd64/compile/obj/GENERIC_SYZKALLER/./x86/lock.h:44 [inline]
[  85.0066883] _kernel_lock() at netbsd:_kernel_lock+0x46d sys/kern/kern_lock.c:268
[  85.0066883] frag6_fasttimo() at netbsd:frag6_fasttimo+0x24 sys/netinet6/frag6.c:662
[  85.0066883] pffasttimo() at netbsd:pffasttimo+0xc6 sys/kern/uipc_domain.c:770
[  85.0066883] callout_softclock() at netbsd:callout_softclock+0x2ab sys/kern/kern_timeout.c:873
[  85.0066883] softint_dispatch() at netbsd:softint_dispatch+0x40a softint_execute sys/kern/kern_softint.c:605 [inline]
[  85.0066883] softint_dispatch() at netbsd:softint_dispatch+0x40a sys/kern/kern_softint.c:848
[  85.0066883] DDB lost frame for netbsd:Xsoftintr+0x4c, trying 0xffff9d022fa320f0
[  85.0066883] Xsoftintr() at netbsd:Xsoftintr+0x4c
[  85.0066883] --- interrupt ---
[  85.0066883] 0:
[  85.0066883] cpu0: End traceback...
[  85.0066883] usb5 at vhci5fatal breakpoint trap: USB revision 2.0 in supervisor mode
[  85.0066883] trap type 1 code 0 rip 0xffffffff80235475 cs 0x8 rflags 0x246 cr2 0 ilevel 0x7 rsp 0xffff9d022fa31c08
[  85.0066883] curlwp 0xffff84ab181c2080 pid 0.5 lowest kstack 0xffff9d022fa2d2c0
Stopped in pid 0.5 (system) at  netbsd:breakpoint+0x5:  leave
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0xec sys/ddb/db_panic.c:71
vpanic() at netbsd:vpanic+0x2f0 sys/kern/subr_prf.c:288
panic() at netbsd:panic+0x49 sys/kern/subr_prf.c:1116
heartbeat() at netbsd:heartbeat+0x7c3 select_patient sys/kern/kern_heartbeat.c:549 [inline]
heartbeat() at netbsd:heartbeat+0x7c3 sys/kern/kern_heartbeat.c:706
hardclock() at netbsd:hardclock+0x1d9 sys/kern/kern_clock.c:348
Xresume_lapic_ltimer() at netbsd:Xresume_lapic_ltimer+0x1e
--- interrupt ---
_kernel_lock() at netbsd:_kernel_lock+0x46d __SIMPLELOCK_LOCKED_P sys/arch/amd64/compile/obj/GENERIC_SYZKALLER/./x86/lock.h:44 [inline]
_kernel_lock() at netbsd:_kernel_lock+0x46d sys/kern/kern_lock.c:268
frag6_fasttimo() at netbsd:frag6_fasttimo+0x24 sys/netinet6/frag6.c:662
pffasttimo() at netbsd:pffasttimo+0xc6 sys/kern/uipc_domain.c:770
callout_softclock() at netbsd:callout_softclock+0x2ab sys/kern/kern_timeout.c:873
softint_dispatch() at netbsd:softint_dispatch+0x40a softint_execute sys/kern/kern_softint.c:605 [inline]
softint_dispatch() at netbsd:softint_dispatch+0x40a sys/kern/kern_softint.c:848
DDB lost frame for netbsd:Xsoftintr+0x4c, trying 0xffff9d022fa320f0
Xsoftintr() at netbsd:Xsoftintr+0x4c
--- interrupt ---
0:
ds          1bc8
es          1c18
fs          10
gs          7
rdi         0
--db_more--