panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) solock Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823e5094) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(fffffd806e7ae990,9,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_write(fffffd806e7ae980) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 solock(fffffd806e7ae978) at solock+0x97 sys/kern/uipc_socket2.c:299 rtm_senddesync_timer(fffffd806e7ae978) at rtm_senddesync_timer+0x1a sys/net/rtsock.c:454 timeout_run(fffffd806f5eacc0) at timeout_run+0xcc sys/kern/kern_timeout.c:674 softclock_process_tick_timeout(fffffd806f5eacc0,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff826ceff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 2 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 acquiring blockable sleep lock with spinlock or critical section held (rwlock) solock ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823e5094) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(fffffd806e7ae990,9,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_write(fffffd806e7ae980) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 solock(fffffd806e7ae978) at solock+0x97 sys/kern/uipc_socket2.c:299 rtm_senddesync_timer(fffffd806e7ae978) at rtm_senddesync_timer+0x1a sys/net/rtsock.c:454 timeout_run(fffffd806f5eacc0) at timeout_run+0xcc sys/kern/kern_timeout.c:674 softclock_process_tick_timeout(fffffd806f5eacc0,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff826ceff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002116f2b0 rbx 0xffff80002116f2c0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81c643c5 kprintf+0x145 r9 0x1 r10 0x5cc7123f99afadc3 r11 0xe311def80f1586d1 r12 0x3000000008 r13 0xffff80002116f360 r14 0x100 r15 0x1 rip 0xffffffff81bca908 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002116f2a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (idle0) pid=168646 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=50, nice=20 forw=0xf481e9a34b046c3c, list=0xffff800021168540,0xffff8000211682b0 process=0xffff8000fffff2a0 user=0xffff80002116a000, vmspace=0xffffffff82914f58 estcpu=0, cpticks=3328, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97063 346355 83246 0 3 0x82 msgwait syz-executor3018 83246 188003 56641 0 3 0x10008a sigsusp ksh 56641 309159 44396 0 3 0x92 select sshd 65423 281098 1 0 3 0x100083 ttyin getty 44396 100409 1 0 3 0x80 select sshd 97543 23055 14389 73 3 0x100090 kqread syslogd 14389 4984 1 0 3 0x100082 netio syslogd 94015 37359 1 77 3 0x100090 poll dhclient 52022 128125 1 0 3 0x80 poll dhclient 79434 310923 0 0 3 0x14200 bored smr 78056 149471 0 0 3 0x14200 pgzero zerothread 47499 69030 0 0 3 0x14200 aiodoned aiodoned 34147 9873 0 0 3 0x14200 syncer update 44082 72676 0 0 3 0x14200 cleaner cleaner 66860 234816 0 0 3 0x14200 reaper reaper 58815 72721 0 0 3 0x14200 pgdaemon pagedaemon 17078 193614 0 0 3 0x14200 bored crynlk 5467 348031 0 0 3 0x14200 bored crypto 81361 356728 0 0 3 0x14200 bored viomb 63496 214254 0 0 3 0x40014200 acpi0 acpi0 38275 60738 0 0 7 0x40014200 idle1 72094 351429 0 0 3 0x14200 bored softnet 42911 1261 0 0 3 0x14200 bored systqmp 18340 210093 0 0 3 0x14200 bored systq 87168 133344 0 0 3 0x40014200 bored softclock *60102 168646 0 0 7 0x40014200 idle0 1 289109 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: shared mutex timeout r = 0 (0xffffffff82721dc8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 timeout_run+0xb7 sys/kern/kern_timeout.c:670 #2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #3 softclock+0x11a sys/kern/kern_timeout.c:752 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x1f #6 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 #7 sched_idle+0x417 sys/kern/kern_sched.c:178 #8 proc_trampoline+0x1c Process 60102 (idle0) thread 0xffff800021168000 (168646) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8290dfb0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90 #2 Xsoftclock+0x1f #3 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 #4 sched_idle+0x417 sys/kern/kern_sched.c:178 #5 proc_trampoline+0x1c shared mutex timeout r = 0 (0xffffffff82721dc8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 timeout_run+0xb7 sys/kern/kern_timeout.c:670 #2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #3 softclock+0x11a sys/kern/kern_timeout.c:752 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x1f #6 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 #7 sched_idle+0x417 sys/kern/kern_sched.c:178 #8 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9469 6344K 6345K 78643K 10559 0 pcb 13 8K 8K 78643K 13 0 rtable 61 2K 2K 78643K 113 0 ifaddr 24 7K 7K 78643K 24 0 counters 40 33K 33K 78643K 40 0 ioctlops 0 0K 2K 78643K 13 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 1 0 vnodes 1182 74K 74K 78643K 1187 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 1 0K 0K 78643K 1 0 proc 47 50K 58K 78643K 274 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 259 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 56 2K 4K 78643K 1167 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 3 0 temp 19 3965K 4029K 78643K 1436 0 kqueue 2 2K 2K 78643K 2 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 120 16 0 13 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 27 0 19 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 64 2 0 0 1 0 1 1 0 8 0 inpcb 304 21 0 16 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 95 0 0 6 0 6 6 0 8 0 art_table 32 96 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1391 0 15 86 0 86 86 0 8 0 ffsino 272 1391 0 15 92 0 92 92 0 8 0 nchpl 144 1567 0 31 57 0 57 57 0 8 0 uvmvnodes 72 1400 0 0 26 0 26 26 0 8 0 vnodes 224 1400 0 0 83 0 83 83 0 8 0 namei 1024 3486 0 3486 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 216 3346 0 3346 2 1 1 2 0 8 1 plimitpl 152 13 0 8 1 0 1 1 0 8 0 sigapl 424 192 0 165 4 0 4 4 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 168 1 0 0 1 0 1 1 0 8 0 pipepl 336 57 0 53 2 1 1 1 0 8 0 fdescpl 496 176 0 165 2 0 2 2 0 8 0 filepl 152 822 0 779 2 0 2 2 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 144 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 57 0 50 1 0 1 1 0 8 0 zombiepl 144 165 0 165 2 1 1 1 0 8 1 processpl 1080 192 0 165 3 1 2 3 0 8 0 procpl 672 192 0 165 3 0 3 3 0 8 0 sockpl 480 64 0 48 4 1 3 3 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 80 0 0 10 0 10 10 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 106 0 0 7 0 7 7 0 8 0 bufpl 280 1922 0 80 132 0 132 132 0 8 0 anonpl 24 25328 0 23667 13 2 11 12 0 186 0 amapchunkpl 152 2244 0 2146 5 0 5 5 0 158 0 amappl16 200 25 0 24 2 1 1 1 0 8 0 amappl15 192 44 0 38 1 0 1 1 0 8 0 amappl13 176 12 0 11 2 1 1 1 0 8 0 amappl12 168 22 0 19 1 0 1 1 0 8 0 amappl11 160 42 0 35 1 0 1 1 0 8 0 amappl10 152 8 0 5 1 0 1 1 0 8 0 amappl9 144 232 0 232 2 1 1 1 0 8 1 amappl8 136 203 0 201 1 0 1 1 0 8 0 amappl7 128 30 0 27 1 0 1 1 0 8 0 amappl6 120 74 0 65 1 0 1 1 0 8 0 amappl5 112 130 0 123 1 0 1 1 0 8 0 amappl4 104 406 0 386 1 0 1 1 0 8 0 amappl3 96 37 0 32 1 0 1 1 0 8 0 amappl2 88 306 0 269 1 0 1 1 0 8 0 amappl1 80 5895 0 5576 9 1 8 8 0 8 0 amappl 88 995 0 952 2 0 2 2 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 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 176 0 165 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 176 0 165 1 0 1 1 0 8 0 vmmpekpl 168 5148 0 5134 1 0 1 1 0 8 0 vmmpepl 168 17427 0 16741 41 7 34 35 0 357 3 vmsppl 368 175 0 165 2 0 2 2 0 8 0 rwobjpl 56 5428 0 4993 8 1 7 7 0 8 0 pdppl 4096 359 0 330 45 16 29 35 0 8 0 pvpl 32 85266 0 82022 35 5 30 30 0 265 2 pmappl 232 175 0 165 1 0 1 1 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 261 0 20 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823e5094) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(fffffd806e7ae990,9,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_write(fffffd806e7ae980) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 solock(fffffd806e7ae978) at solock+0x97 sys/kern/uipc_socket2.c:299 rtm_senddesync_timer(fffffd806e7ae978) at rtm_senddesync_timer+0x1a sys/net/rtsock.c:454 timeout_run(fffffd806f5eacc0) at timeout_run+0xcc sys/kern/kern_timeout.c:674 softclock_process_tick_timeout(fffffd806f5eacc0,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff826ceff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d58ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d58ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5 ddb{1}>