panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *304453 34653 0 0x8000000 0x4000000 0 syz-executor.5 275368 11111 0 0x8000002 0 1 syz-executor.1 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828edd2b) at panic+0x17b sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82d8d7c8,9,0) at witness_checkorder+0xd03 witness_debugger sys/kern/subr_witness.c:2524 [inline] witness_checkorder(ffffffff82d8d7c8,9,0) at witness_checkorder+0xd03 sys/kern/subr_witness.c:786 __mp_lock(ffffffff82d8d5c0) at __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82d8d5c0) at __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82d8d5c0) at __mp_lock+0xa2 sys/kern/kern_lock.c:142 intr_handler(ffff80003738d300,ffff80000067b200) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f Xspllower() at Xspllower+0x1d mtx_enter_try(ffffffff82dfa950) at mtx_enter_try+0x103 mtx_enter(ffffffff82dfa950) at mtx_enter+0x4e sys/kern/kern_lock.c:266 pool_get(ffffffff82dfa950,9) at pool_get+0xc4 sys/kern/subr_pool.c:579 uvmspace_alloc(0,411ef000,1,0) at uvmspace_alloc+0x41 sys/uvm/uvm_map.c:3279 vm_impl_init(ffff80002f14f878,ffff80002a216f80) at vm_impl_init+0x92 sys/arch/amd64/amd64/vmm_machdep.c:1244 vm_create(ffff800000e70400,ffff80002a216f80) at vm_create+0x13e sys/dev/vmm/vmm.c:388 vmmioctl(a00,c2585601,ffff800000e70400,1,ffff80002a216f80) at vmmioctl+0x2de end trace frame: 0xffff80003738d7c0, count: 0 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: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828edd2b) at panic+0x17b sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82d8d7c8,9,0) at witness_checkorder+0xd03 witness_debugger sys/kern/subr_witness.c:2524 [inline] witness_checkorder(ffffffff82d8d7c8,9,0) at witness_checkorder+0xd03 sys/kern/subr_witness.c:786 __mp_lock(ffffffff82d8d5c0) at __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82d8d5c0) at __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82d8d5c0) at __mp_lock+0xa2 sys/kern/kern_lock.c:142 intr_handler(ffff80003738d300,ffff80000067b200) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f Xspllower() at Xspllower+0x1d mtx_enter_try(ffffffff82dfa950) at mtx_enter_try+0x103 mtx_enter(ffffffff82dfa950) at mtx_enter+0x4e sys/kern/kern_lock.c:266 pool_get(ffffffff82dfa950,9) at pool_get+0xc4 sys/kern/subr_pool.c:579 uvmspace_alloc(0,411ef000,1,0) at uvmspace_alloc+0x41 sys/uvm/uvm_map.c:3279 vm_impl_init(ffff80002f14f878,ffff80002a216f80) at vm_impl_init+0x92 sys/arch/amd64/amd64/vmm_machdep.c:1244 vm_create(ffff800000e70400,ffff80002a216f80) at vm_create+0x13e sys/dev/vmm/vmm.c:388 vmmioctl(a00,c2585601,ffff800000e70400,1,ffff80002a216f80) at vmmioctl+0x2de VOP_IOCTL(fffffd806e8cabd8,c2585601,ffff800000e70400,1,fffffd807f7d39c0,ffff80002a216f80) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806aeb9448,c2585601,ffff800000e70400,ffff80002a216f80) at vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a216f80,ffff80003738dac0,ffff80003738da10) at sys_ioctl+0x4a9 syscall(ffff80003738dac0) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80003738dac0) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x28d8b85c290, count: -19 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003738d0f0 rbx 0xffffffff82cb5d77 cpu_info_full_primary+0x2d77 rdx 0xffff800000e09340 rcx 0xffff80002a216f80 rax 0xffffffff82cb4ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa8549f75cbcbb500 r11 0x3acd667078222385 r12 0xffffffff82cb5b78 cpu_info_full_primary+0x2b78 r13 0 r14 0 r15 0x1 rip 0xffffffff815bfa7c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80003738d0e0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.5) tid=304453 pid=34653 tcnt=2 stat=onproc flags process=8000000 proc=4000000 runpri=32, usrpri=79, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002d4b0030,0xffffffff82dfd4a0 process=0xffff80002a2911d8 user=0xffff800037388000, vmspace=0xfffffd806aa936f8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=0, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34653 445715 3144 0 2 0x8000000 syz-executor.5 *34653 304453 3144 0 7 0xc000000 syz-executor.5 79164 93202 71651 0 2 0x8000010 syz-executor.0 79164 246997 71651 0 2 0xc000010 syz-executor.0 92854 448377 1536 0 2 0x8000000 syz-executor.3 92854 102388 1536 0 3 0xc000080 fsleep syz-executor.3 47114 64885 42424 0 2 0x8000000 syz-executor.2 47114 237928 42424 0 3 0xc000080 fsleep syz-executor.2 43288 177350 64754 0 2 0x8000000 syz-executor.6 43288 75842 64754 0 3 0xc000080 fsleep syz-executor.6 43288 302333 64754 0 3 0xc000080 fsleep syz-executor.6 43151 265726 0 0 3 0x14200 acct acct 71651 401996 3437 0 3 0x8000082 nanoslp syz-executor.0 57343 164492 0 0 3 0x14200 bored sosplice 11111 275368 3437 0 7 0x8000002 syz-executor.1 53215 522226 3437 0 3 0x8000082 nanoslp syz-executor.7 3144 466046 3437 0 3 0x8000082 nanoslp syz-executor.5 1536 170977 3437 0 3 0x8000082 nanoslp syz-executor.3 42424 200047 3437 0 3 0x8000082 nanoslp syz-executor.2 66804 490568 3437 0 3 0x8000082 nanoslp syz-executor.4 64754 135491 3437 0 3 0x8000082 nanoslp syz-executor.6 3437 46286 81 0 3 0x1a000082 wait syz-fuzzer 3437 408683 81 0 3 0x1e000082 nanoslp syz-fuzzer 3437 458522 81 0 3 0x1e000082 thrsleep syz-fuzzer 3437 498889 81 0 3 0x1e000082 wait syz-fuzzer 3437 464751 81 0 3 0x1e000082 thrsleep syz-fuzzer 3437 171259 81 0 3 0x1e000082 thrsleep syz-fuzzer 3437 521281 81 0 3 0x1e000082 wait syz-fuzzer 3437 284015 81 0 3 0x1e000082 wait syz-fuzzer 3437 446894 81 0 3 0x1e000082 thrsleep syz-fuzzer 3437 135471 81 0 3 0x1e000082 wait syz-fuzzer 3437 294296 81 0 3 0x1e000082 thrsleep syz-fuzzer 3437 363841 81 0 3 0x1e000082 wait syz-fuzzer 3437 157009 81 0 3 0x1e000082 wait syz-fuzzer 3437 307490 81 0 3 0x1e000082 kqread syz-fuzzer 3437 384302 81 0 3 0x1e000082 wait syz-fuzzer 81 307 98933 0 3 0x810008a sigsusp ksh 98933 332539 70338 0 3 0x1800009a kqread sshd 74458 65361 1 0 3 0x18100083 ttyin getty 70338 110300 1 0 3 0x18000088 kqread sshd 79973 57820 39774 73 3 0x19100090 kqread syslogd 39774 287803 1 0 3 0x18100082 sbwait syslogd 15593 202699 1 0 3 0x18100080 kqread resolvd 87996 202995 73583 77 3 0x18100092 kqread dhcpleased 48961 337896 73583 77 3 0x18100092 kqread dhcpleased 73583 366702 1 0 3 0x18000080 kqread dhcpleased 36135 106594 0 0 3 0x14200 bored smr 26859 221751 0 0 3 0x14200 pgzero zerothread 17834 105769 0 0 3 0x14200 aiodoned aiodoned 62606 202371 0 0 3 0x14200 syncer update 79032 107467 0 0 3 0x14200 cleaner cleaner 54878 263699 0 0 3 0x14200 reaper reaper 8506 242827 0 0 3 0x14200 pgdaemon pagedaemon 33303 482947 0 0 3 0x14200 bored viomb 66262 356794 0 0 3 0x40014200 acpi0 acpi0 21000 450321 0 0 3 0x40014200 idle1 85957 513138 0 0 3 0x14200 bored softnet3 6127 431531 0 0 3 0x14200 bored softnet2 81426 970 0 0 3 0x14200 bored softnet1 22513 395311 0 0 2 0x14200 softnet0 87577 280097 0 0 3 0x14200 bored systqmp 63153 173556 0 0 3 0x14200 bored systq 37124 182985 0 0 3 0x14200 tmoslp softclockmp 23319 242529 0 0 3 0x40014200 tmoslp softclock 20992 190458 0 0 3 0x40014200 idle0 1 335943 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex vmsppl r = 0 (0xffffffff82dfa960) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 pool_get+0xc4 sys/kern/subr_pool.c:579 #4 uvmspace_alloc+0x41 sys/uvm/uvm_map.c:3279 #5 vm_impl_init+0x92 sys/arch/amd64/amd64/vmm_machdep.c:1244 #6 vm_create+0x13e sys/dev/vmm/vmm.c:388 #7 vmmioctl+0x2de #8 VOP_IOCTL+0x9a sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 #10 sys_ioctl+0x4a9 #11 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] #11 syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 6549K 6811K 166960K 11592 0 pcb 17 12K 12K 166960K 93 0 rtable 234 8K 8K 166960K 423 0 pf 31 9K 10K 166960K 53 0 ifaddr 44 15K 15K 166960K 58 0 ifgroup 54 2K 2K 166960K 71 0 sysctl 3 1K 1K 166960K 4 0 counters 66 36K 36K 166960K 76 0 ioctlops 1 1K 4K 166960K 1503 0 iov 0 0K 16K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1380 87K 87K 166960K 1615 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 35 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 89K 166960K 470 0 sigio 0 0K 0K 166960K 41 0 proc 58 79K 115K 166960K 524 0 subproc 104 6K 7K 166960K 119 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 59 0 in_multi 89 6K 7K 166960K 127 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 497 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 267 77K 94K 166960K 6631 0 UVM aobj 22 2K 2K 166960K 23 0 pinsyscall 35 70K 100K 166960K 1631 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 45 0 NDP 12 0K 2K 166960K 35 0 temp 60 6816K 6892K 166960K 18364 0 kqueue 13 20K 24K 166960K 87 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 76 0 73 1 0 1 1 0 8 0 rtentry 112 131 0 24 4 0 4 4 0 8 0 unpcb 144 330 0 313 3 1 2 2 0 8 1 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 30 0 30 1 1 0 1 0 8 0 tcpcb 808 233 0 226 8 7 1 8 0 8 0 arp 120 21 0 3 1 0 1 1 0 8 0 inpcb 384 602 0 592 8 6 2 8 0 8 0 nd6 136 30 0 6 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 2 0 2 1 1 0 1 0 8 0 pffrag 232 5 0 1 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 49 0 45 1 0 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 43 0 11 1 0 1 1 0 8 0 pfstkey 128 43 0 11 2 0 2 2 0 8 0 pfstate 376 43 0 11 4 0 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 509 0 86 29 2 27 29 0 8 0 art_table 32 510 0 86 4 0 4 4 0 8 0 art_node 16 128 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 5 1 0 1 1 0 8 0 semapl 112 31 0 21 1 0 1 1 0 8 0 shmpl 112 20 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2169 0 649 96 0 96 96 0 8 0 ffsino 272 2169 0 649 102 0 102 102 0 8 0 nchpl 144 2938 0 1194 67 0 67 67 0 8 0 uvmvnodes 80 2417 0 0 50 0 50 50 0 8 0 vnodes 216 2417 0 0 135 0 135 135 0 8 0 namei 1024 10353 0 10353 4 3 1 3 0 8 1 percpumem 16 52 0 5 1 0 1 1 0 8 0 vmpool 696 3 0 2 1 0 1 1 0 8 0 kstatmem 264 34 0 10 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 10502 0 10502 10 9 1 8 1 8 1 plimitpl 152 93 0 76 1 0 1 1 0 8 0 sigapl 424 776 0 728 7 0 7 7 0 8 0 futexpl 64 6134 0 6130 1 0 1 1 0 8 0 knotepl 120 365 0 0 12 0 12 12 0 8 0 kqueuepl 216 146 0 137 1 0 1 1 0 8 0 pipepl 320 180 0 152 3 0 3 3 0 8 0 fdescpl 496 756 0 730 6 2 4 5 0 8 0 filepl 152 4501 0 4250 14 3 11 14 0 8 0 lockfpl 104 92 0 90 1 0 1 1 0 8 0 lockfspl 48 45 0 43 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 26 0 10 1 0 1 1 0 8 0 ucredpl 104 571 0 559 1 0 1 1 0 8 0 zombiepl 144 730 0 728 2 1 1 1 0 8 0 processpl 1136 776 0 728 4 0 4 4 0 8 0 procpl 656 1239 0 1171 7 0 7 7 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 10 0 10 2 1 1 1 0 8 1 sockpl 664 1016 0 986 10 6 4 9 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 416 0 0 52 0 52 52 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 994 0 0 62 0 62 62 0 8 0 bufpl 280 5079 0 181 350 0 350 350 0 8 0 anonpl 24 244983 0 239210 107 21 86 86 0 186 44 amapchunkpl 152 21921 0 21291 32 1 31 31 0 158 2 amappl16 200 6296 0 6170 36 19 17 33 0 8 8 amappl15 192 33 0 31 1 0 1 1 0 8 0 amappl14 184 197 0 185 2 1 1 2 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 1440 0 1410 2 0 2 2 0 8 0 amappl11 160 57 0 47 1 0 1 1 0 8 0 amappl10 152 49 0 41 2 1 1 1 0 8 0 amappl9 144 174 0 173 1 0 1 1 0 8 0 amappl8 136 135 0 101 2 0 2 2 0 8 0 amappl7 128 64 0 53 1 0 1 1 0 8 0 amappl6 120 338 0 325 2 1 1 2 0 8 0 amappl5 112 191 0 178 1 0 1 1 0 8 0 amappl4 104 544 0 513 2 0 2 2 0 8 0 amappl3 96 4741 0 4670 3 0 3 3 0 8 0 amappl2 88 1157 0 1090 4 2 2 4 0 8 0 amappl1 80 10612 0 10126 23 11 12 22 0 8 1 amappl 88 6057 0 5877 6 0 6 6 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 22 0 1 1 0 1 1 0 8 0 uaddrrnd 24 758 0 732 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 758 0 732 1 0 1 1 0 8 0 vmmpekpl 168 10115 0 10059 3 0 3 3 0 8 0 vmmpepl 168 68247 0 66477 140 34 106 117 0 357 22 vmsppl 440 757 0 732 4 0 4 4 0 8 0 rwobjpl 56 26581 0 23097 57 2 55 55 0 8 3 pdppl 4096 1523 0 1464 119 54 65 79 0 8 6 pvpl 32 49181 0 0 397 0 397 397 0 265 0 pmappl 248 757 0 732 4 2 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 484 0 70 13 0 13 13 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(ffffffff828edd2b) at panic+0x17b sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82d8d7c8,9,0) at witness_checkorder+0xd03 witness_debugger sys/kern/subr_witness.c:2524 [inline] witness_checkorder(ffffffff82d8d7c8,9,0) at witness_checkorder+0xd03 sys/kern/subr_witness.c:786 __mp_lock(ffffffff82d8d5c0) at __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82d8d5c0) at __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82d8d5c0) at __mp_lock+0xa2 sys/kern/kern_lock.c:142 intr_handler(ffff80003738d300,ffff80000067b200) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f Xspllower() at Xspllower+0x1d mtx_enter_try(ffffffff82dfa950) at mtx_enter_try+0x103 mtx_enter(ffffffff82dfa950) at mtx_enter+0x4e sys/kern/kern_lock.c:266 pool_get(ffffffff82dfa950,9) at pool_get+0xc4 sys/kern/subr_pool.c:579 uvmspace_alloc(0,411ef000,1,0) at uvmspace_alloc+0x41 sys/uvm/uvm_map.c:3279 vm_impl_init(ffff80002f14f878,ffff80002a216f80) at vm_impl_init+0x92 sys/arch/amd64/amd64/vmm_machdep.c:1244 vm_create(ffff800000e70400,ffff80002a216f80) at vm_create+0x13e sys/dev/vmm/vmm.c:388 vmmioctl(a00,c2585601,ffff800000e70400,1,ffff80002a216f80) at vmmioctl+0x2de VOP_IOCTL(fffffd806e8cabd8,c2585601,ffff800000e70400,1,fffffd807f7d39c0,ffff80002a216f80) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806aeb9448,c2585601,ffff800000e70400,ffff80002a216f80) at vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a216f80,ffff80003738dac0,ffff80003738da10) at sys_ioctl+0x4a9 syscall(ffff80003738dac0) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80003738dac0) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x28d8b85c290, count: -19 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 __mp_lock(ffffffff82d8d5c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8d5c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80003256d080) at syscall+0x221 mi_syscall sys/sys/syscall_mi.h:157 [inline] syscall(ffff80003256d080) at syscall+0x221 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70c263635080, count: 9 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 __mp_lock(ffffffff82d8d5c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8d5c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80003256d080) at syscall+0x221 mi_syscall sys/sys/syscall_mi.h:157 [inline] syscall(ffff80003256d080) at syscall+0x221 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70c263635080, count: -6