panic: softclock: invalid to_clock: 512 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8291b09d) 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+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82d21ff0) at sched_idle+0x41e 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: 512 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8291b09d) 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+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82d21ff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -7 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a1022c0 rbx 0xffffffff82d22cb7 cpu_info_full_primary+0x2cb7 rdx 0 rcx 0xffff80002a0fc7e8 rax 0xffffffff82d21ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb3f30bde1686f53e r11 0x92e45ddbc9f97ee1 r12 0xffffffff82d22ab8 cpu_info_full_primary+0x2ab8 r13 0 r14 0 r15 0x1 rip 0xffffffff8178926c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002a1022b0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (idle0) tid=145346 pid=8502 tcnt=1 stat=onproc flags process=14000 proc=40000200 runpri=0, usrpri=50, slppri=0, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0x1dcb09983d0208d1, list=0xffff80002a0fca90,0xffff80002a0fc000 process=0xffff8000fffff0d0 user=0xffff80002a0fd000, vmspace=0xffffffff82e114a0 estcpu=0, cpticks=25819, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29251 63672 53224 0 3 0x82 piperd syz-executor.1 42727 98702 53224 0 3 0x82 piperd syz-executor.5 27619 219367 53224 0 3 0x82 piperd syz-executor.6 55031 343419 53224 0 3 0x82 piperd syz-executor.4 25136 516404 53224 0 3 0x82 piperd syz-executor.3 34543 258980 1 0 3 0x100083 ttyin getty 30076 335689 53224 0 3 0x82 piperd syz-executor.2 59383 174407 53224 0 2 0x482 syz-executor.7 19214 373089 53224 0 3 0x82 piperd syz-executor.0 25637 173700 0 0 3 0x14200 acct acct 20176 225713 0 0 3 0x14280 nfsidl nfsio 14913 289095 0 0 3 0x14280 nfsidl nfsio 53147 518802 0 0 3 0x14280 nfsidl nfsio 86910 405372 0 0 3 0x14280 nfsidl nfsio 75540 487858 0 0 3 0x14280 nfsidl nfsio 41870 403648 0 0 3 0x14280 nfsidl nfsio 27921 21943 0 0 3 0x14280 nfsidl nfsio 79325 225052 0 0 3 0x14280 nfsidl nfsio 9139 3043 0 0 3 0x14280 nfsidl nfsio 40550 231248 0 0 3 0x14280 nfsidl nfsio 99492 437624 0 0 3 0x14280 nfsidl nfsio 97292 51642 0 0 3 0x14280 nfsidl nfsio 62977 299727 0 0 3 0x14280 nfsidl nfsio 81576 294594 0 0 3 0x14280 nfsidl nfsio 25219 46808 0 0 3 0x14280 nfsidl nfsio 28629 331200 0 0 3 0x14280 nfsidl nfsio 89122 415298 0 0 3 0x14280 nfsidl nfsio 57290 10278 0 0 3 0x14280 nfsidl nfsio 86810 305516 0 0 3 0x14280 nfsidl nfsio 3434 314766 0 0 3 0x14280 nfsidl nfsio 7312 230117 0 0 3 0x14200 bored sosplice 53224 123193 94346 0 3 0x2000082 thrsleep syz-fuzzer 53224 40919 94346 0 3 0x6000082 thrsleep syz-fuzzer 53224 122910 94346 0 3 0x6000082 thrsleep syz-fuzzer 53224 88776 94346 0 3 0x6000082 kqread syz-fuzzer 53224 129332 94346 0 3 0x6000082 wait syz-fuzzer 53224 325382 94346 0 3 0x6000082 thrsleep syz-fuzzer 53224 433004 94346 0 3 0x6000082 wait syz-fuzzer 53224 242075 94346 0 3 0x6000082 wait syz-fuzzer 53224 458681 94346 0 3 0x6000082 wait syz-fuzzer 53224 120499 94346 0 3 0x6000082 thrsleep syz-fuzzer 53224 398295 94346 0 3 0x6000082 thrsleep syz-fuzzer 53224 325575 94346 0 3 0x6000082 wait syz-fuzzer 53224 39015 94346 0 3 0x6000082 wait syz-fuzzer 53224 99087 94346 0 3 0x6000082 thrsleep syz-fuzzer 53224 406236 94346 0 3 0x6000082 wait syz-fuzzer 53224 136754 94346 0 3 0x6000082 wait syz-fuzzer 94346 454545 31571 0 3 0x10008a sigsusp ksh 31571 233949 20727 0 3 0x9a kqread sshd 20727 115818 1 0 3 0x88 kqread sshd 42830 258557 54485 74 3 0x1100092 bpf pflogd 54485 171599 1 0 3 0x80 netio pflogd 74107 184607 64438 73 3 0x1100010 ffs_fsync syslogd 64438 479236 1 0 3 0x100082 netio syslogd 22775 6672 1 0 3 0x100080 kqread resolvd 91266 285292 39362 77 3 0x100092 kqread dhcpleased 23483 518617 39362 77 3 0x100092 kqread dhcpleased 39362 194773 1 0 3 0x80 kqread dhcpleased 570 182354 0 0 3 0x14200 bored smr 19987 188097 0 0 3 0x14200 pgzero zerothread 45571 222950 0 0 3 0x14200 aiodoned aiodoned 69511 385297 0 0 3 0x14200 syncer update 45647 209530 0 0 3 0x14200 cleaner cleaner 68471 21992 0 0 3 0x14200 reaper reaper 96384 327104 0 0 3 0x14200 pgdaemon pagedaemon 3303 62656 0 0 3 0x14200 bored viomb 47097 17313 0 0 3 0x40014200 acpi0 acpi0 48138 75754 0 0 7 0x40014200 idle1 96102 143463 0 0 3 0x14200 bored softnet3 29958 28712 0 0 3 0x14200 bored softnet2 369 180792 0 0 3 0x14200 bored softnet1 31823 191469 0 0 3 0x14200 bored softnet0 97359 74192 0 0 3 0x14200 bored systqmp 86948 247931 0 0 3 0x14200 bored systq 7543 161252 0 0 3 0x14200 tmoslp softclockmp 22688 211757 0 0 3 0x40014200 tmoslp softclock * 8502 145346 0 0 7 0x40014200 idle0 1 237484 0 0 3 0x82 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 (0xffffffff82d2a980) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 softclock_process_tick_timeout+0x1b2 sys/kern/kern_timeout.c:723 #4 softclock+0x13a sys/kern/kern_timeout.c:755 #5 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #6 Xsoftclock+0x27 #7 acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 #8 sched_idle+0x41e sys/kern/kern_sched.c:183 #9 proc_trampoline+0x10 Process 74107 (syslogd) thread 0xffff80002a18ad48 (184607) Process 8502 (idle0) thread 0xffff80002a0fc7e8 (145346) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 6505K 6828K 166960K 13961 0 pcb 15 24K 28K 166960K 854 0 rtable 188 14K 16K 166960K 2181 0 pf 33 9K 10K 166960K 270 0 ifaddr 37 14K 16K 166960K 253 0 ifgroup 56 2K 2K 166960K 434 0 sysctl 3 0K 0K 166960K 7 0 counters 64 36K 37K 166960K 274 0 ioctlops 0 0K 4K 166960K 2054 0 iov 0 0K 32K 166960K 1376 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 1 0 vnodes 1473 92K 92K 166960K 4355 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 129 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 1362 0 dirhash 12 2K 2K 166960K 81 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 11 37K 89K 166960K 11656 0 sigio 0 0K 0K 166960K 794 0 proc 73 91K 128K 166960K 1887 0 subproc 104 6K 8K 166960K 524 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 548 0 in_multi 75 5K 7K 166960K 464 0 ether_multi 1 0K 0K 166960K 13 0 mrt 0 0K 0K 166960K 6 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 2329 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 452 397K 414K 166960K 110878 0 UVM aobj 131 4K 4K 166960K 138 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 331 0 NDP 12 0K 2K 166960K 189 0 temp 74 6772K 7412K 166960K 124391 0 kqueue 12 18K 28K 166960K 864 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 120 770 0 767 11 10 1 3 0 8 0 rtentry 112 571 0 489 5 2 3 4 0 8 0 unpcb 144 8917 0 8902 89 83 6 10 0 8 5 syncache 336 110 0 110 19 19 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 210 0 210 14 14 0 1 0 8 0 tcpcb 808 3930 0 3920 115 107 8 12 0 8 6 arp 120 104 0 93 1 0 1 1 0 8 0 inpcb 392 10544 0 10528 174 165 9 26 0 8 7 nd6 136 113 0 94 1 0 1 1 0 8 0 pkpcb 40 33 0 33 8 8 0 1 0 8 0 kcovpl 48 37 0 29 1 0 1 1 0 8 0 ppxss 1168 29 0 29 9 9 0 1 0 8 0 pffrag 232 39 0 37 6 5 1 1 0 482 0 pffrnode 88 38 0 36 6 5 1 1 0 8 0 pffrent 40 140 0 138 6 5 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 24 374 0 349 1 0 1 1 0 8 0 pfstkey 128 374 0 349 3 1 2 2 0 8 0 pfstate 376 374 0 349 13 9 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 1939 0 1562 52 25 27 31 0 8 0 art_table 32 1941 0 1563 4 0 4 4 0 8 0 art_node 16 521 0 449 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 26 2 2 0 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 1358 0 1348 1 0 1 1 0 8 0 shmpl 112 135 0 7 4 0 4 4 0 8 0 dirhash 1024 63 0 46 3 0 3 3 0 8 0 dino2pl 256 17013 0 15509 95 0 95 95 0 8 0 ffsino 272 17013 0 15509 101 0 101 101 0 8 0 nchpl 144 33715 0 32068 64 0 64 64 0 8 0 uvmvnodes 80 6619 0 0 136 0 136 136 0 8 0 vnodes 216 6619 0 0 368 0 368 368 0 8 0 namei 1024 114230 0 114230 16 15 1 2 0 8 1 percpumem 16 151 0 105 1 0 1 1 0 8 0 vcpupl 2048 90 0 1 12 0 12 12 0 8 0 vmpool 696 116 0 27 11 2 9 9 0 8 0 kstatmem 264 234 0 210 7 5 2 3 0 8 0 scxspl 216 120688 0 120687 25 24 1 8 1 8 0 plimitpl 152 1869 0 1853 1 0 1 1 0 8 0 sigapl 424 11998 0 11934 14 5 9 9 0 8 0 futexpl 64 102392 0 102392 4 3 1 1 0 8 1 knotepl 120 803 0 0 16 5 11 11 0 8 0 kqueuepl 216 2189 0 2181 34 33 1 8 0 8 0 pipepl 320 2042 0 2014 61 53 8 8 0 8 5 fdescpl 496 11957 0 11933 10 6 4 5 0 8 0 filepl 152 71817 0 71576 128 113 15 24 0 8 2 lockfpl 104 2839 0 2837 7 6 1 3 0 8 0 lockfspl 48 717 0 715 1 0 1 1 0 8 0 sessionpl 144 58 0 41 1 0 1 1 0 8 0 pgrppl 48 241 0 224 1 0 1 1 0 8 0 ucredpl 104 9534 0 9516 1 0 1 1 0 8 0 zombiepl 144 11935 0 11934 3 2 1 1 0 8 0 processpl 1136 11998 0 11934 6 0 6 6 0 8 0 procpl 680 29651 0 29572 11 2 9 10 0 8 0 srpgc 96 50 0 50 17 16 1 1 0 8 1 sosppl 168 181 0 178 10 9 1 1 0 8 0 sockpl 584 20274 0 20243 212 201 11 20 0 8 8 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 344 0 0 33 9 24 33 0 8 0 mtagpl 96 108 0 0 3 0 3 3 0 8 0 mbufpl 256 3945 0 0 214 0 214 214 0 8 0 bufpl 280 25902 0 19279 474 0 474 474 0 8 0 anonpl 24 1236454 0 1222318 353 188 165 165 0 186 53 amapchunkpl 152 355114 0 354326 162 95 67 67 0 158 22 amappl16 200 22699 0 22205 89 61 28 39 0 8 0 amappl15 192 19 0 19 2 2 0 1 0 8 0 amappl14 184 281 0 262 2 1 1 2 0 8 0 amappl13 176 41 0 40 1 0 1 1 0 8 0 amappl12 168 13132 0 13107 3 1 2 2 0 8 0 amappl11 160 59 0 45 1 0 1 1 0 8 0 amappl10 152 68 0 56 1 0 1 1 0 8 0 amappl9 144 245 0 245 22 22 0 1 0 8 0 amappl8 136 644 0 517 6 1 5 5 0 8 0 amappl7 128 316 0 286 2 0 2 2 0 8 0 amappl6 120 818 0 793 1 0 1 1 0 8 0 amappl5 112 344 0 333 1 0 1 1 0 8 0 amappl4 104 843 0 811 2 0 2 2 0 8 0 amappl3 96 69122 0 69054 5 2 3 4 0 8 0 amappl2 88 12960 0 12880 3 1 2 3 0 8 0 amappl1 80 53440 0 52897 23 10 13 23 0 8 0 amappl 88 109684 0 109453 7 0 7 7 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 72 137 0 7 3 0 3 3 0 8 0 uaddrrnd 24 12073 0 11960 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12073 0 11960 1 0 1 1 0 8 0 vmmpekpl 168 83538 0 83467 4 0 4 4 0 8 0 vmmpepl 168 709514 0 707172 391 252 139 146 0 357 11 vmsppl 448 12072 0 11960 17 3 14 14 0 8 0 rwobjpl 56 171518 0 163110 127 7 120 123 0 8 0 pdppl 4096 24153 0 24009 559 401 158 158 0 8 14 pvpl 32 43950 0 0 355 1 354 354 0 265 0 pmappl 248 12072 0 11960 10 2 8 8 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1481 0 794 20 0 20 20 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(ffffffff8291b09d) 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+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82d21ff0) at sched_idle+0x41e 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029cebff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: 10 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029cebff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -5