[ 55.0032251] panic: cpu0: softints stuck for 16 seconds [ 55.0032251] cpu0: Begin traceback... [ 55.0032251] __sanitizer_cov_trace_pc() at netbsd:__sanitizer_cov_trace_pc+0x88 sys/kern/subr_kcov.c:596 [ 55.0032251] vpanic() at netbsd:vpanic+0x2f0 sys/kern/subr_prf.c:288 [ 55.0032251] ttwrite() at netbsd:ttwrite+0xad1 ttstart sys/kern/tty.c:1854 [inline] [ 55.0032251] ttwrite() at netbsd:ttwrite+0xad1 sys/kern/tty.c:2368 [ 55.0032251] panic() at comwrite() at netbsd:panic+0x49 sys/kern/subr_prf.c:1116 [ 55.0032251] netbsd:comwrite+0x135 [ 55.0032251] heartbeat() at cdev_write() at netbsd:heartbeat+0x7c3 select_patient sys/kern/kern_heartbeat.c:549 [inline] [ 55.0032251] heartbeat() at cdev_write() at netbsd:heartbeat+0x7c3 sys/kern/kern_heartbeat.c:706 [ 55.0032251] netbsd:cdev_write+0x14c [ 55.0032251] hardclock() at cnwrite() at netbsd:hardclock+0x1d9 sys/kern/kern_clock.c:348 [ 55.0032251] netbsd:cnwrite+0xcb [ 55.0032251] Xresume_lapic_ltimer() at cdev_write() at netbsd:Xresume_lapic_ltimer+0x1e [ 55.0032251] --- interrupt --- [ 55.0032251] netbsd:cdev_write+0x14c [ 55.0032251] ipi_wait() at spec_write() at netbsd:ipi_wait+0x10b sys/kern/subr_ipi.c:451 [ 55.0032251] netbsd:spec_write+0x278 [ 55.0032251] _kernel_lock() at VOP_WRITE() at netbsd:_kernel_lock+0x53b sys/kern/kern_lock.c:278 [ 55.0032251] netbsd:VOP_WRITE+0x2ab [ 55.0032251] intr_biglock_wrapper() at vn_write() at netbsd:intr_biglock_wrapper+0x23 x86_curcpu sys/arch/amd64/compile/obj/GENERIC_SYZKALLER/./machine/cpu.h:64 [inline] [ 55.0032251] intr_biglock_wrapper() at vn_write() at netbsd:intr_biglock_wrapper+0x23 sys/arch/x86/x86/intr.c:676 [ 55.0032251] netbsd:vn_write+0x309 [ 55.0032251] Xhandle_ioapic_edge19() at netbsd:Xhandle_ioapic_edge19+0x75 [ 55.0032251] --- interrupt --- [ 55.0032251] do_filewritev.part.0() at netbsd:do_filewritev.part.0+0x56d [ 55.0032251] __sanitizer_cov_trace_pc() at netbsd:__sanitizer_cov_trace_pc+0x16 sys/kern/subr_kcov.c:581 [ 55.0032251] sys_writev() at netbsd:sys_writev+0x5e do_filewritev sys/kern/sys_generic.c:383 [inline] [ 55.0032251] sys_writev() at netbsd:sys_writev+0x5e sys/kern/sys_generic.c:383 [ 55.0032251] _kernel_lock() at netbsd:_kernel_lock+0x491 sys/kern/kern_lock.c:270 [ 55.0032251] sys___syscall() at netbsd:sys___syscall+0x1e4 sy_call sys/sys/syscallvar.h:65 [inline] [ 55.0032251] sys___syscall() at netbsd:sys___syscall+0x1e4 sys/kern/sys_syscall.c:90 [ 55.0032251] softint_dispatch() at netbsd:softint_dispatch+0xada softint_execute sys/kern/kern_softint.c:602 [inline] [ 55.0032251] softint_dispatch() at netbsd:softint_dispatch+0xada sys/kern/kern_softint.c:848 [ 55.0032251] Skipping crash dump on recursive panic [ 55.0032251] panic: UBSan: Undefined Behavior in /syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:125:24, member access within misaligned address 0x98fe for type 'struct x86_64_frame' which requires 8 byte alignment [ 55.0032251] Faulted in mid-traceback; aborting... [ 55.0032251] syscall() at fatal breakpoint trap in supervisor mode [ 55.0032251] trap type 1 code 0 rip 0xffffffff80235475 cs 0x8 rflags 0x202 cr2 0x7e0ee12f6f68 ilevel 0x7 rsp 0xffffa4022fa37c30 [ 55.0032251] curlwp 0xffffd7caacfc24c0 pid 0.6 lowest kstack 0xffffa4022fa342c0 Stopped in pid 0.6 (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 Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352 HandleTypeMismatch() at netbsd:HandleTypeMismatch+0xfc sys/../common/lib/libc/misc/ubsan.c:432 db_nextframe() at netbsd:db_nextframe+0x790 sys/arch/amd64/amd64/db_machdep.c:125 db_stack_trace_print() at netbsd:db_stack_trace_print+0x281 sys/arch/x86/x86/db_trace.c:278 db_panic() at netbsd:db_panic+0x9d x86_curcpu sys/arch/amd64/compile/obj/GENERIC_SYZKALLER/./machine/cpu.h:64 [inline] db_panic() at netbsd:db_panic+0x9d sys/ddb/db_panic.c:61 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 --- ipi_wait() at netbsd:ipi_wait+0x10b sys/kern/subr_ipi.c:451 _kernel_lock() at netbsd:_kernel_lock+0x53b sys/kern/kern_lock.c:278 intr_biglock_wrapper() at netbsd:intr_biglock_wrapper+0x23 x86_curcpu sys/arch/amd64/compile/obj/GENERIC_SYZKALLER/./machine/cpu.h:64 [inline] intr_biglock_wrapper() at netbsd:intr_biglock_wrapper+0x23 sys/arch/x86/x86/intr.c:676 Xhandle_ioapic_edge19() at netbsd:Xhandle_ioapic_edge19+0x75 --- interrupt --- __sanitizer_cov_trace_pc() at netbsd:__sanitizer_cov_trace_pc+0x16 sys/kern/subr_kcov.c:581 _kernel_lock() at netbsd:_kernel_lock+0x491 sys/kern/kern_lock.c:270 softint_dispatch() at netbsd:softint_dispatch+0xada softint_execute sys/kern/kern_softint.c:602 [inline] softint_dispatch() at netbsd:softint_dispatch+0xada sys/kern/kern_softint.c:848