panic: softclock: invalid to_clock: 1073741824 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 379046 46546 0 0x2 0 1 syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82852ba5) at panic+0x17b sys/kern/subr_prf.c:198 softclock(0) at softclock+0x22d sys/kern/kern_timeout.c:759 softintr_dispatch(0) at softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82ca7ff0) at sched_idle+0x41d sys/kern/kern_sched.c:183 end trace frame: 0x0, count: 8 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: softclock: invalid to_clock: 1073741824 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82852ba5) at panic+0x17b sys/kern/subr_prf.c:198 softclock(0) at softclock+0x22d sys/kern/kern_timeout.c:759 softintr_dispatch(0) at softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82ca7ff0) at sched_idle+0x41d sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -7 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a101f00 rbx 0xffffffff82ca8cb7 cpu_info_full_primary+0x2cb7 rdx 0 rcx 0xffff80002a0fbaa0 rax 0xffffffff82ca7ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x87ae9ae570caa2da r11 0x4e404e1fa6fd2099 r12 0xffffffff82ca8ab8 cpu_info_full_primary+0x2ab8 r13 0 r14 0 r15 0x1 rip 0xffffffff81ef391c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002a101ef0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (idle0) tid=93015 pid=25944 tcnt=1 stat=onproc flags process=14000 proc=40000200 runpri=0, usrpri=50, slppri=0, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xfcce8c2e090527bb, list=0xffff80002a0fcd38,0xffff80002a0fb010 process=0xffff8000ffffdf10 user=0xffff80002a0fd000, vmspace=0xffffffff82e7b8e8 estcpu=0, cpticks=63641, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 11014 237453 7644 0 2 0x480 syz-executor.5 11014 171113 7644 0 3 0x4000080 wsevent_read syz-executor.5 11014 418696 7644 0 3 0x4000080 fsleep syz-executor.5 55187 436595 30820 0 2 0x480 syz-executor.7 55187 222018 30820 0 3 0x4000080 ttyin syz-executor.7 55187 90273 30820 0 3 0x4000080 ttyout syz-executor.7 59706 124086 63875 0 3 0x82 piperd syz-executor.1 36459 163225 0 0 3 0x14200 acct acct 46546 379046 63875 0 7 0x2 syz-executor.0 93760 19821 63875 0 3 0x82 piperd syz-executor.3 30820 150640 63875 0 2 0x2 syz-executor.7 21946 136589 63875 0 2 0x482 syz-executor.4 30530 326123 63875 0 3 0x82 nanoslp syz-executor.2 44857 380410 63875 0 3 0x82 piperd syz-executor.6 7644 140990 63875 0 3 0x82 nanoslp syz-executor.5 75451 374368 1 0 3 0x18100083 ttyin getty 94998 483195 1 0 3 0x80 fsleep syz-executor.4 94998 278915 1 0 3 0x4000080 netio syz-executor.4 15214 374926 1 0 3 0x80 fsleep syz-executor.0 15214 90702 1 0 3 0x4000080 netcon syz-executor.0 15214 324405 1 0 3 0x4000080 fsleep syz-executor.0 96425 340159 0 0 3 0x14200 bored sosplice 18231 218434 0 0 3 0x14280 nfsidl nfsio 69265 484838 0 0 3 0x14280 nfsidl nfsio 60122 199028 0 0 3 0x14280 nfsidl nfsio 71333 328783 0 0 3 0x14280 nfsidl nfsio 55828 519967 0 0 3 0x14280 nfsidl nfsio 32589 151650 0 0 3 0x14280 nfsidl nfsio 32455 34043 0 0 3 0x14280 nfsidl nfsio 37826 35258 0 0 3 0x14280 nfsidl nfsio 27329 264429 0 0 3 0x14280 nfsidl nfsio 6513 307819 0 0 3 0x14280 nfsidl nfsio 98403 357275 0 0 3 0x14280 nfsidl nfsio 99971 300875 0 0 3 0x14280 nfsidl nfsio 80187 151039 0 0 3 0x14280 nfsidl nfsio 91293 180434 0 0 3 0x14280 nfsidl nfsio 53034 157634 0 0 3 0x14280 nfsidl nfsio 66061 205557 0 0 3 0x14280 nfsidl nfsio 76940 255093 0 0 3 0x14280 nfsidl nfsio 10450 5356 0 0 3 0x14280 nfsidl nfsio 1076 68304 0 0 3 0x14280 nfsidl nfsio 18281 263970 0 0 3 0x14280 nfsidl nfsio 63875 450545 15320 0 3 0x1a000082 wait syz-fuzzer 63875 278440 15320 0 3 0x1e000082 nanoslp syz-fuzzer 63875 138789 15320 0 3 0x1e000082 thrsleep syz-fuzzer 63875 301072 15320 0 3 0x1e000082 wait syz-fuzzer 63875 449104 15320 0 3 0x1e000082 wait syz-fuzzer 63875 191153 15320 0 3 0x1e000082 kqread syz-fuzzer 63875 21781 15320 0 3 0x1e000082 thrsleep syz-fuzzer 63875 521500 15320 0 3 0x1e000082 wait syz-fuzzer 63875 496293 15320 0 3 0x1e000082 thrsleep syz-fuzzer 63875 84413 15320 0 3 0x1e000082 thrsleep syz-fuzzer 63875 431067 15320 0 3 0x1e000082 thrsleep syz-fuzzer 63875 158084 15320 0 3 0x1e000082 wait syz-fuzzer 63875 15338 15320 0 3 0x1e000082 thrsleep syz-fuzzer 63875 28163 15320 0 3 0x1e000082 wait syz-fuzzer 63875 384697 15320 0 3 0x1e000082 wait syz-fuzzer 63875 112747 15320 0 3 0x1e000082 wait syz-fuzzer 15320 195905 50071 0 3 0x810008a sigsusp ksh 50071 220457 92352 0 3 0x1800009a kqread sshd 92352 504323 1 0 3 0x18000088 kqread sshd 35505 162102 14661 74 3 0x19100092 bpf pflogd 14661 212537 1 0 3 0x18000080 netio pflogd 76661 306635 25091 73 3 0x19100090 kqread syslogd 25091 75998 1 0 3 0x18100082 netio syslogd 71612 467930 1 0 3 0x18100080 kqread resolvd 48773 377262 74991 77 3 0x18100092 kqread dhcpleased 82337 472559 74991 77 3 0x18100092 kqread dhcpleased 74991 193797 1 0 3 0x18000080 kqread dhcpleased 78300 182432 0 0 3 0x14200 bored smr 24270 216972 0 0 3 0x14200 pgzero zerothread 60108 164622 0 0 3 0x14200 aiodoned aiodoned 34608 42568 0 0 3 0x14200 syncer update 64786 234728 0 0 3 0x14200 cleaner cleaner 63278 114490 0 0 3 0x14200 reaper reaper 4864 18129 0 0 3 0x14200 pgdaemon pagedaemon 4842 435452 0 0 3 0x14200 bored viomb 66802 154731 0 0 3 0x40014200 acpi0 acpi0 6450 328938 0 0 3 0x40014200 idle1 64006 336544 0 0 3 0x14200 bored softnet3 42821 421514 0 0 3 0x14200 bored softnet2 25612 126281 0 0 3 0x14200 bored softnet1 3145 299855 0 0 3 0x14200 bored softnet0 76838 67274 0 0 3 0x14200 bored systqmp 5869 25693 0 0 3 0x14200 bored systq 70071 423020 0 0 3 0x14200 tmoslp softclockmp 62241 46879 0 0 3 0x40014200 tmoslp softclock *25944 93015 0 0 7 0x40014200 idle0 1 272609 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff82d29980) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 softclock_process_tick_timeout+0x19d sys/kern/kern_timeout.c:723 #4 softclock+0x139 sys/kern/kern_timeout.c:755 #5 softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90 #6 Xsoftclock+0x27 #7 acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 #8 sched_idle+0x41d sys/kern/kern_sched.c:183 #9 proc_trampoline+0x10 CPU 1: exclusive sched_lock &sched_lock r = 0 (0xffffffff82e02b60) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 single_thread_check+0x41 sys/kern/kern_sig.c:2057 #2 sleep_finish+0x2c5 sleep_signal_check sys/kern/kern_synch.c:458 [inline] #2 sleep_finish+0x2c5 sys/kern/kern_synch.c:439 #3 sys_nanosleep+0x1f8 sys/kern/kern_time.c:297 #4 syscall+0x5b5 mi_syscall sys/sys/syscall_mi.h:183 [inline] #4 syscall+0x5b5 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 11014 (syz-executor.5) thread 0xffff80002a256558 (171113) exclusive rrwlock inode r = 0 (0xfffffd805b1c7c50) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 rw_enter+0x32a sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8e sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 spec_open+0x230 sys/kern/spec_vnops.c:151 #6 VOP_OPEN+0x76 sys/kern/vfs_vops.c:138 #7 vn_open+0x4e4 sys/kern/vfs_vnops.c:177 #8 vndioctl+0x988 sys/dev/vnd.c:457 #9 VOP_IOCTL+0x97 sys/kern/vfs_vops.c:264 #10 vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 #11 sys_ioctl+0x4a9 #12 syscall+0x5b5 mi_syscall sys/sys/syscall_mi.h:183 [inline] #12 syscall+0x5b5 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 Process 25944 (idle0) thread 0xffff80002a0fbaa0 (93015) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82e56290) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 #2 Xsoftclock+0x27 #3 acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 #4 sched_idle+0x41d sys/kern/kern_sched.c:183 #5 proc_trampoline+0x10 exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff82d29980) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 softclock_process_tick_timeout+0x19d sys/kern/kern_timeout.c:723 #4 softclock+0x139 sys/kern/kern_timeout.c:755 #5 softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90 #6 Xsoftclock+0x27 #7 acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 #8 sched_idle+0x41d sys/kern/kern_sched.c:183 #9 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10258 6523K 7119K 166960K 50050 0 pcb 16 26K 30K 166960K 2037 0 rtable 251 8K 8K 166960K 4627 0 pf 43 11K 11K 166960K 537 0 ifaddr 53 18K 18K 166960K 516 0 ifgroup 76 3K 3K 166960K 923 0 sysctl 4 1K 5K 166960K 7 0 counters 74 37K 37K 166960K 486 0 ioctlops 0 0K 4K 166960K 2915 0 iov 0 0K 40K 166960K 2648 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1640 103K 103K 166960K 13704 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 209 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 2998 0 dirhash 12 2K 2K 166960K 156 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 85K 166960K 21410 0 sigio 0 0K 0K 166960K 1062 0 proc 73 91K 128K 166960K 3603 0 subproc 130 8K 8K 166960K 1570 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1618 0 in_multi 101 7K 7K 166960K 1135 0 ether_multi 1 0K 0K 166960K 17 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 355 1579K 1579K 166960K 355 0 exec 0 0K 1K 166960K 4391 0 pfkey data 0 0K 4K 166960K 15 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 549 676K 677K 166960K 206220 0 UVM aobj 131 4K 4K 166960K 136 0 pinsyscall 26 52K 108K 166960K 4013 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 972 0 NDP 17 0K 1K 166960K 402 0 temp 84 6813K 6956K 166960K 319588 0 kqueue 12 18K 29K 166960K 1338 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 1749 0 1746 24 23 1 5 0 8 0 rtentry 112 1296 0 1182 5 1 4 4 0 8 0 unpcb 144 16293 0 16273 190 188 2 9 0 8 1 syncache 336 269 0 269 50 50 0 1 0 8 0 sackhl 24 4 0 4 2 2 0 1 0 8 0 tcpqe 32 260 3987 260 3 2 1 1 0 8 1 tcpcb 808 6908 0 6808 222 205 17 24 0 8 0 arp 120 275 0 255 1 0 1 1 0 8 0 ipq 40 3 0 3 1 1 0 1 0 8 0 ipqe 40 9 0 9 1 1 0 1 0 8 0 inpcb 392 16959 0 16763 365 339 26 33 0 8 0 nd6 136 279 0 253 1 0 1 1 0 8 0 pkpcb 40 215 0 215 20 20 0 1 0 8 0 kcovpl 48 114 0 104 1 0 1 1 0 8 0 ppxss 1168 27 0 27 8 8 0 1 0 8 0 pffrag 232 118 0 114 9 8 1 1 0 482 0 pffrnode 88 118 0 114 9 8 1 1 0 8 0 pffrent 40 833 0 829 12 11 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 733 0 699 1 0 1 1 0 8 0 pfstkey 128 737 0 703 4 2 2 2 0 8 0 pfstate 376 737 0 703 20 16 4 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 4545 0 4066 65 35 30 30 0 8 0 art_table 32 4547 0 4067 4 0 4 4 0 8 0 art_node 16 1290 0 1187 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 2 3 2 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 2996 0 2986 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 113 0 96 3 0 3 3 0 8 0 dino2pl 256 28954 0 27323 103 0 103 103 0 8 0 ffsino 272 28954 0 27323 109 0 109 109 0 8 0 nchpl 144 57316 0 55579 66 0 66 66 0 8 0 uvmvnodes 80 8250 0 0 169 0 169 169 0 8 0 vnodes 216 8250 0 0 459 0 459 459 0 8 0 namei 1024 193942 0 193942 5 4 1 2 0 8 1 percpumem 16 257 0 206 1 0 1 1 0 8 0 vcpupl 2048 276 0 0 35 0 35 35 0 8 0 vmpool 696 304 0 28 27 1 26 26 0 8 0 kstatmem 264 446 0 412 6 3 3 3 0 8 0 scxspl 216 179129 0 179129 45 42 3 8 1 8 3 plimitpl 152 2147 0 2129 1 0 1 1 0 8 0 sigapl 424 21549 0 21479 12 3 9 9 0 8 0 futexpl 64 193212 0 193208 2 1 1 1 0 8 0 knotepl 120 1119 0 0 11 0 11 11 0 8 0 kqueuepl 216 3440 0 3432 62 61 1 6 0 8 0 pipepl 320 4521 0 4491 122 119 3 14 0 8 0 fdescpl 496 21506 0 21478 6 1 5 5 0 8 0 filepl 152 125246 0 124900 236 221 15 23 0 8 0 lockfpl 104 7349 0 7347 14 13 1 2 0 8 0 lockfspl 48 2547 0 2545 1 0 1 1 0 8 0 sessionpl 144 105 0 86 1 0 1 1 0 8 0 pgrppl 48 635 0 616 1 0 1 1 0 8 0 ucredpl 104 16536 0 16517 1 0 1 1 0 8 0 zombiepl 144 21482 0 21479 3 2 1 1 0 8 0 processpl 1136 21549 0 21479 6 0 6 6 0 8 0 procpl 680 56726 0 56634 34 24 10 11 0 8 0 srpgc 96 112 0 112 39 39 0 1 0 8 0 sosppl 168 226 0 203 7 5 2 2 0 8 0 sockpl 584 35313 0 35091 340 319 21 28 0 8 0 mcl64k 65536 42 0 0 4 1 3 3 0 8 1 mcl16k 16384 42 0 0 5 2 3 3 0 8 0 mcl12k 12288 49 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 4 1 3 3 0 8 0 mcl4k 4096 41 0 0 4 1 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 616 0 0 36 15 21 36 0 8 1 mtagpl 96 973 0 0 15 0 15 15 0 8 0 mbufpl 256 7468 0 0 430 1 429 429 0 8 0 bufpl 280 38307 0 30056 590 0 590 590 0 8 0 anonpl 24 2519969 0 2505306 316 179 137 164 0 186 0 amapchunkpl 152 673112 0 672172 158 111 47 67 0 158 0 amappl16 200 54553 0 53788 290 245 45 56 0 8 0 amappl15 192 151 0 149 1 0 1 1 0 8 0 amappl14 184 509 0 486 3 1 2 2 0 8 0 amappl13 176 26 0 26 4 4 0 1 0 8 0 amappl12 168 23407 0 23374 3 1 2 2 0 8 0 amappl11 160 91 0 75 1 0 1 1 0 8 0 amappl10 152 174 0 158 1 0 1 1 0 8 0 amappl9 144 444 0 443 1 0 1 1 0 8 0 amappl8 136 1115 0 945 7 0 7 7 0 8 0 amappl7 128 166 0 150 1 0 1 1 0 8 0 amappl6 120 1602 0 1572 3 2 1 2 0 8 0 amappl5 112 962 0 947 1 0 1 1 0 8 0 amappl4 104 1592 0 1535 4 2 2 4 0 8 0 amappl3 96 126153 0 126058 10 6 4 4 0 8 0 amappl2 88 23109 0 23014 6 3 3 4 0 8 0 amappl1 80 89468 0 88919 23 10 13 23 0 8 0 amappl 88 204509 0 204200 9 0 9 9 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 21810 0 21506 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 21810 0 21506 2 0 2 2 0 8 0 vmmpekpl 168 154455 0 154346 6 0 6 6 0 8 0 vmmpepl 168 1345118 0 1342021 903 715 188 200 0 357 24 vmsppl 448 21809 0 21506 36 1 35 35 0 8 0 rwobjpl 56 321844 0 311346 176 25 151 152 0 8 0 pdppl 4096 43627 0 43288 1542 1192 350 350 0 8 11 pvpl 32 46612 0 0 377 1 376 376 0 265 0 pmappl 248 21809 0 21506 22 2 20 20 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3040 0 1862 34 0 34 34 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82852ba5) at panic+0x17b sys/kern/subr_prf.c:198 softclock(0) at softclock+0x22d sys/kern/kern_timeout.c:759 softintr_dispatch(0) at softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82ca7ff0) at sched_idle+0x41d sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x35 sys/dev/kcov.c:164 __mp_lock(ffffffff82e56088) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e56088) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff80002e98bd20) at syscall+0x522 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002e98bd20) at syscall+0x522 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fee044897c0, count: 8 ddb{1}> trace x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x35 sys/dev/kcov.c:164 __mp_lock(ffffffff82e56088) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e56088) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff80002e98bd20) at syscall+0x522 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002e98bd20) at syscall+0x522 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fee044897c0, count: -7