panic: softclock: invalid to_clock: -538976289 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 219728 21932 0 0x1a000002 0x4000000 1 syz-fuzzer *127829 13870 0 0x14000 0x200 0K reaper db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8285200a) 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 Xspllower() at Xspllower+0x1d printf(ffffffff8293f9f1) at printf+0x88 sys/kern/subr_prf.c:532 uvm_fault_unwire_locked(fffffd8066168e18,d9169fde000,d916a1dd000) at uvm_fault_unwire_locked+0x211 uvm_unmap_kill_entry_withlock(fffffd8066168e18,fffffd8073b4d2b8,0) at uvm_unmap_kill_entry_withlock+0x6b sys/uvm/uvm_map.c:1925 uvm_map_teardown(fffffd8066168e18) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8066168e18) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2565 uvmspace_free(fffffd8066168e18) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3497 reaper(ffff80002a1467f0) at reaper+0x19a sys/kern/kern_exit.c:463 end trace frame: 0x0, count: 3 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: -538976289 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8285200a) 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 Xspllower() at Xspllower+0x1d printf(ffffffff8293f9f1) at printf+0x88 sys/kern/subr_prf.c:532 uvm_fault_unwire_locked(fffffd8066168e18,d9169fde000,d916a1dd000) at uvm_fault_unwire_locked+0x211 uvm_unmap_kill_entry_withlock(fffffd8066168e18,fffffd8073b4d2b8,0) at uvm_unmap_kill_entry_withlock+0x6b sys/uvm/uvm_map.c:1925 uvm_map_teardown(fffffd8066168e18) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8066168e18) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2565 uvmspace_free(fffffd8066168e18) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3497 reaper(ffff80002a1467f0) at reaper+0x19a sys/kern/kern_exit.c:463 end trace frame: 0x0, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a152380 rbx 0xffffffff82cc2cb7 cpu_info_full_primary+0x2cb7 rdx 0 rcx 0xffff80002a1467f0 rax 0xffffffff82cc1ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x8769a09682c27af1 r11 0x1745e6ae3b16571d r12 0xffffffff82cc2ab8 cpu_info_full_primary+0x2ab8 r13 0 r14 0 r15 0x1 rip 0xffffffff826c18ec db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002a152370 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) tid=127829 pid=13870 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=86, usrpri=85, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a146a98,0xffff80002a145ab8 process=0xffff8000ffffb9b8 user=0xffff80002a14d000, vmspace=0xffffffff82d63498 estcpu=35, cpticks=17, pctcpu=8.60, user=0, sys=319, intr=3 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 87389 242983 64850 0 2 0 syz-executor.6 54863 393277 4659 0 2 0x4081000 syz-executor.5 54863 315782 4659 0 3 0x4003000 suspend syz-executor.5 99100 432468 21932 0 3 0x82 wait syz-executor.3 32391 307933 21932 0 3 0x82 wait syz-executor.1 21977 71046 21932 0 3 0x82 wait syz-executor.7 4659 162505 21932 0 2 0x482 syz-executor.5 71469 2968 0 0 3 0x14200 acct acct 34425 120275 21932 0 2 0x2 syz-executor.4 70403 95920 21932 0 3 0x82 wait syz-executor.2 64850 155529 21932 0 3 0x82 wait syz-executor.6 36194 80064 1 0 3 0x18100083 ttyin getty 48107 449309 0 0 3 0x14280 nfsidl nfsio 70423 17846 0 0 3 0x14280 nfsidl nfsio 48212 276623 0 0 3 0x14280 nfsidl nfsio 32101 225511 0 0 3 0x14280 nfsidl nfsio 29500 77742 0 0 3 0x14280 nfsidl nfsio 75939 15629 0 0 3 0x14280 nfsidl nfsio 29076 384442 0 0 3 0x14280 nfsidl nfsio 92546 40261 0 0 3 0x14280 nfsidl nfsio 29328 493883 0 0 3 0x14280 nfsidl nfsio 2969 317098 0 0 3 0x14280 nfsidl nfsio 39370 231477 0 0 3 0x14280 nfsidl nfsio 12154 336645 0 0 3 0x14280 nfsidl nfsio 38968 453324 0 0 3 0x14280 nfsidl nfsio 78793 216374 0 0 3 0x14280 nfsidl nfsio 92125 364165 0 0 3 0x14280 nfsidl nfsio 5332 470740 0 0 3 0x14280 nfsidl nfsio 90956 483537 0 0 3 0x14280 nfsidl nfsio 52877 59271 0 0 3 0x14280 nfsidl nfsio 69077 53350 0 0 3 0x14280 nfsidl nfsio 71740 445185 0 0 3 0x14280 nfsidl nfsio 18633 395577 0 0 3 0x14200 bored sosplice 21932 492855 21288 0 3 0x1a000082 wait syz-fuzzer 21932 147131 21288 0 2 0x1e000482 syz-fuzzer 21932 219728 21288 0 7 0x1e000002 syz-fuzzer 21932 252583 21288 0 3 0x1e000082 thrsleep syz-fuzzer 21932 350125 21288 0 3 0x1e000082 thrsleep syz-fuzzer 21932 55785 21288 0 3 0x1e000082 thrsleep syz-fuzzer 21932 318915 21288 0 2 0x1e000002 syz-fuzzer 21932 79670 21288 0 3 0x1e000082 thrsleep syz-fuzzer 21932 265146 21288 0 3 0x1e000082 wait syz-fuzzer 21932 328155 21288 0 3 0x1e000082 wait syz-fuzzer 21932 183983 21288 0 3 0x1e000082 thrsleep syz-fuzzer 21932 265597 21288 0 3 0x1e000082 wait syz-fuzzer 21932 500358 21288 0 3 0x1e000082 thrsleep syz-fuzzer 21932 131131 21288 0 3 0x1e000082 wait syz-fuzzer 21932 78775 21288 0 3 0x1e000082 wait syz-fuzzer 21932 454091 21288 0 3 0x1e000082 wait syz-fuzzer 21288 204124 6469 0 3 0x810008a sigsusp ksh 6469 440425 42653 0 3 0x1800009a kqread sshd 42653 196426 1 0 3 0x18000088 kqread sshd 6573 247027 92217 74 3 0x19100092 bpf pflogd 92217 309969 1 0 3 0x18000080 netio pflogd 50290 225368 97060 73 2 0x19100010 syslogd 97060 166070 1 0 3 0x18100082 netio syslogd 79133 354070 1 0 3 0x18100080 kqread resolvd 5350 208640 89823 77 3 0x18100092 kqread dhcpleased 86977 178092 89823 77 3 0x18100092 kqread dhcpleased 89823 154819 1 0 3 0x18000080 kqread dhcpleased 97215 437707 0 0 3 0x14200 bored smr 29287 62098 0 0 2 0x14200 zerothread 60035 317943 0 0 3 0x14200 aiodoned aiodoned 513 65391 0 0 2 0x14600 update 77649 366960 0 0 3 0x14200 cleaner cleaner *13870 127829 0 0 7 0x14200 reaper 762 117807 0 0 3 0x14200 pgdaemon pagedaemon 27885 45211 0 0 3 0x14200 bored viomb 45909 487677 0 0 3 0x40014200 acpi0 acpi0 65701 153445 0 0 3 0x40014200 idle1 95687 24751 0 0 3 0x14200 bored softnet3 27653 131038 0 0 3 0x14200 bored softnet2 11210 361360 0 0 3 0x14200 bored softnet1 79300 118254 0 0 2 0x14200 softnet0 2507 297472 0 0 2 0x14200 systqmp 96450 387 0 0 3 0x14200 bored systq 75064 172786 0 0 2 0x14200 softclockmp 78092 230914 0 0 2 0x40014200 softclock 67388 212515 0 0 3 0x40014200 idle0 1 334465 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 (0xffffffff82cbd260) #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 Xspllower+0x1d #8 printf+0x88 sys/kern/subr_prf.c:532 #9 uvm_fault_unwire_locked+0x211 #10 uvm_unmap_kill_entry_withlock+0x6b sys/uvm/uvm_map.c:1925 #11 uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #11 uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2565 #12 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3497 #13 reaper+0x19a sys/kern/kern_exit.c:463 #14 proc_trampoline+0x10 Process 34425 (syz-executor.4) thread 0xffff80002a17dd50 (120275) Process 50290 (syslogd) thread 0xffff80002a18a000 (225368) Process 13870 (reaper) thread 0xffff80002a1467f0 (127829) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10230 6520K 7650K 166960K 59933 0 pcb 15 26K 30K 166960K 3331 0 rtable 182 7K 9K 166960K 6481 0 pf 39 10K 11K 166960K 808 0 ifaddr 51 20K 22K 166960K 737 0 ifgroup 68 2K 3K 166960K 1304 0 sysctl 4 1K 3K 166960K 87 0 counters 70 37K 37K 166960K 808 0 ioctlops 0 0K 4K 166960K 3478 0 iov 0 0K 36K 166960K 4378 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1686 106K 106K 166960K 18990 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 353 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 3578 0 dirhash 12 2K 3K 166960K 270 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 11 37K 86K 166960K 37879 0 sigio 0 0K 0K 166960K 1023 0 proc 80 92K 128K 166960K 4809 0 subproc 91 5K 7K 166960K 1242 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 3645 0 in_multi 66 4K 7K 166960K 1897 0 ether_multi 1 0K 0K 166960K 42 0 mrt 1 0K 0K 166960K 28 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 5370 0 pfkey data 0 0K 0K 166960K 63 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 631 1078K 1090K 166960K 371313 0 UVM aobj 131 4K 4K 166960K 139 0 pinsyscall 26 52K 108K 166960K 4183 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 1486 0 NDP 15 0K 1K 166960K 576 0 temp 70 6811K 6940K 166960K 291871 0 kqueue 12 18K 30K 166960K 3086 0 SYN cache 2 760K 768K 166960K 3 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 2500 0 2497 27 26 1 4 0 8 0 rtentry 112 2063 0 1985 8 5 3 4 0 8 0 unpcb 144 32083 0 32068 271 265 6 12 0 8 5 syncache 336 250 0 250 51 51 0 1 0 8 0 tcpqe 32 314 0 314 36 36 0 1 0 8 0 tcpcb 808 11433 0 11423 247 243 4 16 0 8 0 arp 120 454 0 443 1 0 1 1 0 8 0 inpcb 392 28865 0 28852 431 424 7 22 0 8 3 nd6 136 298 0 281 1 0 1 1 0 8 0 pkpcb 40 186 0 186 28 28 0 1 0 8 0 kcovpl 48 94 0 87 1 0 1 1 0 8 0 ppxss 1168 132 0 132 34 34 0 1 0 8 0 pffrag 232 214 0 210 7 6 1 1 0 482 0 pffrnode 88 210 0 206 7 6 1 1 0 8 0 pffrent 40 629 0 625 8 7 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 1075 0 1051 1 0 1 1 0 8 0 pfstkey 128 1117 0 1093 5 3 2 3 0 8 0 pfstate 376 1117 0 1093 20 14 6 7 0 8 1 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 6 0 5 4 3 1 3 0 8 0 art_heap4 256 5716 0 5382 73 49 24 31 0 8 0 art_table 32 5722 0 5387 5 1 4 4 0 8 0 art_node 16 1898 0 1828 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 7 1 0 1 1 0 8 0 semapl 112 3576 0 3566 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 189 0 172 3 0 3 3 0 8 0 dino2pl 256 51121 0 49452 105 0 105 105 0 8 0 ffsino 272 51121 0 49452 113 1 112 112 0 8 0 nchpl 144 101628 0 99883 67 0 67 67 0 8 0 uvmvnodes 80 8706 0 0 178 0 178 178 0 8 0 vnodes 216 8706 0 0 484 0 484 484 0 8 0 namei 1024 334896 0 334895 11 10 1 2 0 8 0 percpumem 16 418 0 369 1 0 1 1 0 8 0 vcpupl 2048 514 0 2 64 0 64 64 0 8 0 vmpool 696 555 0 43 48 1 47 47 0 8 0 kstatmem 264 768 0 738 5 2 3 3 0 8 0 scxspl 216 321139 0 321139 108 104 4 8 1 8 4 plimitpl 152 4914 0 4898 1 0 1 1 0 8 0 sigapl 424 38096 0 38028 23 14 9 9 0 8 0 futexpl 64 290208 0 290208 10 9 1 1 0 8 1 knotepl 120 1887 0 0 25 7 18 19 0 8 0 kqueuepl 216 7482 0 7474 119 118 1 8 0 8 0 pipepl 320 4765 0 4740 118 114 4 10 0 8 1 fdescpl 496 38011 0 37987 30 26 4 5 0 8 0 filepl 152 219594 0 219375 280 264 16 21 0 8 4 lockfpl 104 10595 0 10593 19 18 1 4 0 8 0 lockfspl 48 3381 0 3379 1 0 1 1 0 8 0 sessionpl 144 116 0 100 1 0 1 1 0 8 0 pgrppl 48 965 0 949 1 0 1 1 0 8 0 ucredpl 104 28766 0 28754 2 1 1 2 0 8 0 zombiepl 144 38033 0 38028 2 1 1 1 0 8 0 processpl 1136 38096 0 38028 7 1 6 6 0 8 0 procpl 680 105075 0 104985 15 6 9 10 0 8 0 srpgc 96 135 0 135 41 41 0 1 0 8 0 sosppl 168 479 0 479 34 34 0 1 0 8 0 sockpl 584 63773 0 63742 497 486 11 23 0 8 6 mcl64k 65536 42 0 0 4 1 3 3 0 8 0 mcl16k 16384 41 0 0 3 0 3 3 0 8 0 mcl12k 12288 49 0 0 3 1 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 50 0 0 5 2 3 3 0 8 0 mcl4k 4096 73 0 0 7 4 3 3 0 8 0 mcl2k2 2112 18 0 0 2 0 2 2 0 8 0 mcl2k 2048 569 0 0 33 21 12 32 0 8 0 mtagpl 96 909 0 0 10 5 5 9 0 8 0 mbufpl 256 7065 0 0 421 0 421 421 0 8 0 bufpl 280 70275 0 61568 623 0 623 623 0 8 0 anonpl 24 4023116 0 3995811 414 234 180 180 0 186 0 amapchunkpl 152 1181888 0 1180185 235 166 69 71 0 158 1 amappl16 200 84212 0 83662 351 315 36 45 0 8 0 amappl15 192 137 0 136 2 1 1 1 0 8 0 amappl14 184 406 0 386 7 5 2 2 0 8 0 amappl13 176 37 0 36 3 2 1 1 0 8 0 amappl12 168 40107 0 40063 8 5 3 3 0 8 0 amappl11 160 79 0 65 1 0 1 1 0 8 0 amappl10 152 301 0 277 2 0 2 2 0 8 0 amappl9 144 704 0 703 1 0 1 1 0 8 0 amappl8 136 1727 0 1528 8 0 8 8 0 8 0 amappl7 128 231 0 217 1 0 1 1 0 8 0 amappl6 120 1777 0 1751 2 1 1 2 0 8 0 amappl5 112 1277 0 1262 1 0 1 1 0 8 0 amappl4 104 1984 0 1928 3 1 2 3 0 8 0 amappl3 96 227931 0 227841 4 1 3 3 0 8 0 amappl2 88 40194 0 40100 7 4 3 4 0 8 0 amappl1 80 146522 0 145981 24 11 13 23 0 8 0 amappl 88 368986 0 368666 11 2 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 72 138 0 8 3 0 3 3 0 8 0 uaddrrnd 24 38566 0 38027 4 0 4 4 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 38566 0 38027 4 0 4 4 0 8 0 vmmpekpl 168 246532 0 246398 7 0 7 7 0 8 0 vmmpepl 168 2266702 0 2263558 686 520 166 188 0 357 0 vmsppl 448 38565 0 38026 67 6 61 61 0 8 0 rwobjpl 56 546631 0 535895 176 22 154 154 0 8 0 pdppl 4096 77139 0 76564 1461 880 581 585 0 8 6 pvpl 32 48849 0 0 396 2 394 394 0 265 0 pmappl 248 38565 0 38026 38 4 34 35 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3221 0 1799 42 0 42 42 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(ffffffff8285200a) 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 Xspllower() at Xspllower+0x1d printf(ffffffff8293f9f1) at printf+0x88 sys/kern/subr_prf.c:532 uvm_fault_unwire_locked(fffffd8066168e18,d9169fde000,d916a1dd000) at uvm_fault_unwire_locked+0x211 uvm_unmap_kill_entry_withlock(fffffd8066168e18,fffffd8073b4d2b8,0) at uvm_unmap_kill_entry_withlock+0x6b sys/uvm/uvm_map.c:1925 uvm_map_teardown(fffffd8066168e18) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8066168e18) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2565 uvmspace_free(fffffd8066168e18) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3497 reaper(ffff80002a1467f0) at reaper+0x19a sys/kern/kern_exit.c:463 end trace frame: 0x0, count: -12 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+0x29 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:158 __mp_lock(ffffffff82d60af0) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d60af0) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff80002a1f2c60) at syscall+0x522 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002a1f2c60) at syscall+0x522 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x230036760, 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+0x29 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:158 __mp_lock(ffffffff82d60af0) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d60af0) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff80002a1f2c60) at syscall+0x522 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002a1f2c60) at syscall+0x522 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x230036760, count: -7