witness: lock order reversal: 1st 0xffffffff8395a358 pf_lock (pf_lock) 2nd 0xffffffff8391e250 netlock (netlock) lock order [1] pf_lock (pf_lock) -> [2] netlock (netlock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 uvn_io+0x54c sys/uvm/uvm_vnode.c:1243 #2 uvn_get+0x31d sys/uvm/uvm_vnode.c:1075 #3 uvm_fault_lower_io+0x2ce sys/uvm/uvm_fault.c:1612 #4 uvm_fault_lower+0x28d sys/uvm/uvm_fault.c:1381 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #7 kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 #8 alltraps_kern_meltdown+0x7b #9 _copyin+0x5b #10 pfioctl+0x13ff sys/net/pf_ioctl.c:3238 #11 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #12 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537 #13 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #14 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #14 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #15 Xsyscall+0x128 lock order [2] netlock (netlock) -> [1] pf_lock (pf_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 pfi_attach_ifgroup+0x2a sys/net/pf_if.c:357 #2 if_addgroup+0x2f8 if_creategroup sys/net/if.c:3057 [inline] #2 if_addgroup+0x2f8 sys/net/if.c:3095 #3 if_attachsetup+0xcf sys/net/if.c:512 #4 if_attach+0x6d sys/net/if.c:604 #5 vio_attach+0x17f7 sys/dev/pv/if_vio.c:927 #6 config_attach+0x449 sys/kern/subr_autoconf.c:421 #7 virtio_pci_attach+0x52c sys/dev/pci/virtio_pci.c:675 #8 config_attach+0x449 sys/kern/subr_autoconf.c:421 #9 pci_probe_device+0x8e5 sys/dev/pci/pci.c:574 #10 pci_enumerate_bus+0x368 sys/dev/pci/pci.c:877 #11 config_attach+0x449 sys/kern/subr_autoconf.c:421 #12 acpipci_attach_bus+0x37a sys/arch/amd64/pci/acpipci.c:231 #13 acpipci_attach_busses+0x93 sys/arch/amd64/pci/acpipci.c:239 #14 mainbus_attach+0x304 sys/arch/amd64/amd64/mainbus.c:222 #15 config_attach+0x449 sys/kern/subr_autoconf.c:421 #16 cpu_configure+0x47 sys/arch/amd64/amd64/autoconf.c:124 #17 main+0x4c7 sys/kern/init_main.c:345 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffffffff8391e250,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(ffffffff8391e238,0) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 uvn_io(fffffd806c434dd0,ffff800032b9d6e8,1,202,0) at uvn_io+0x54c sys/uvm/uvm_vnode.c:1243 uvn_get(fffffd806c434dd0,0,ffff800032b9d7b8,ffff800032b9d79c,0,1,8a5d2a74b9d67da8,1) at uvn_get+0x31d sys/uvm/uvm_vnode.c:1075 uvm_fault_lower_io(ffff800032b9d9d0,ffff800032b9da08,ffff800032b9d850,ffff800032b9d838) at uvm_fault_lower_io+0x2ce sys/uvm/uvm_fault.c:1612 uvm_fault_lower(ffff800032b9d9d0,ffff800032b9da08,ffff800032b9d950) at uvm_fault_lower+0x28d sys/uvm/uvm_fault.c:1381 uvm_fault(fffffd806c6c43e8,200000000000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 kpageflttrap(ffff800032b9db80,200000000200) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff800032b9db80) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x5b pfioctl(24900,c4504441,ffff800001606000,1,ffff80002a246a78) at pfioctl+0x13ff sys/net/pf_ioctl.c:3238 VOP_IOCTL(fffffd806c510e60,c4504441,ffff800001606000,1,fffffd80097fd750,ffff80002a246a78) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806544f408,c4504441,ffff800001606000,ffff80002a246a78) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537 sys_ioctl(ffff80002a246a78,ffff800032b9e730,ffff800032b9e680) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff800032b9e730) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032b9e730) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd34da672d90, count: -18 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff800032b9d4a0 rbx 0 rdx 0xffff8000015c8b40 rcx 0xffff80002a246a78 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff800032b9d380 r9 0x8080808080808080 r10 0x3f7a51117a378f25 r11 0xaff91379149cd0de r12 0xfffffd80040c02c0 r13 0xfffffd80048afa38 r14 0x3 r15 0xffffffff83529224 substchar+0x7ae3 rip 0xffffffff8320f575 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800032b9d490 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=164573 pid=6311 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a247ca0,0xffff80002a2467f0 process=0xffff8000ffff1828 user=0xffff800032b99000, vmspace=0xfffffd806c6c43e8 estcpu=9, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 689 484723 90614 0 2 0 syz-executor 74346 220434 47516 0 2 0 syz-executor 74346 183684 47516 0 3 0x4000080 fsleep syz-executor 74346 157988 47516 0 3 0x4000080 fsleep syz-executor 74346 511033 47516 0 2 0x4000000 syz-executor 6311 481771 61023 0 2 0 syz-executor * 6311 164573 61023 0 7 0x4000000 syz-executor 17804 170212 50704 0 2 0 syz-executor 17804 462983 50704 0 3 0x4000080 fsleep syz-executor 11105 327644 79137 0 2 0 syz-executor 11105 152392 79137 0 3 0x4000080 fsleep syz-executor 7171 457789 52080 0 2 0 syz-executor 7171 106680 52080 0 3 0x4000080 fsleep syz-executor 66251 239701 60844 0 2 0 syz-executor 66251 32623 60844 0 3 0x4000080 fsleep syz-executor 35174 79972 78682 0 2 0x2 syz-executor 52080 520841 78682 0 3 0x82 nanoslp syz-executor 90614 140982 78682 0 3 0x82 nanoslp syz-executor 60844 347735 78682 0 3 0x82 nanoslp syz-executor 47516 370489 78682 0 7 0x3 syz-executor 50704 445932 78682 0 3 0x82 nanoslp syz-executor 61023 314893 78682 0 3 0x82 nanoslp syz-executor 79137 85841 78682 0 3 0x82 nanoslp syz-executor 78682 91047 1758 0 3 0x82 kqread syz-executor 1758 243572 51676 0 3 0x10008a sigsusp ksh 51676 103183 64513 0 3 0x98 kqread sshd-session 64513 509400 89058 0 3 0x92 kqread sshd-session 63321 39150 1 0 3 0x100083 ttyin getty 89058 491626 1 0 3 0x88 kqread sshd 99500 138769 86649 74 3 0x1100092 bpf pflogd 86649 77042 1 0 3 0x80 sbwait pflogd 70580 381143 68260 73 3 0x1100090 kqread syslogd 68260 483636 1 0 3 0x100082 sbwait syslogd 93496 356191 1 0 3 0x100080 kqread resolvd 14889 321851 58082 77 3 0x100092 kqread dhcpleased 98181 169368 58082 77 3 0x100092 kqread dhcpleased 58082 477946 1 0 3 0x80 kqread dhcpleased 44634 209116 0 0 3 0x14200 bored smr 90222 155478 0 0 2 0x14200 zerothread 10651 289339 0 0 3 0x14200 aiodoned aiodoned 49721 469558 0 0 3 0x14200 syncer update 79940 439096 0 0 3 0x14200 cleaner cleaner 71601 179544 0 0 3 0x14200 reaper reaper 29383 279786 0 0 3 0x14200 pgdaemon pagedaemon 61179 302013 0 0 3 0x14200 bored viomb 82544 325614 0 0 3 0x40014200 acpi0 acpi0 91644 196065 0 0 3 0x40014200 idle1 44595 135930 0 0 3 0x14200 bored softnet1 55514 348188 0 0 3 0x14200 bored softnet0 69388 489774 0 0 3 0x14200 smrbar systqmp 40903 35260 0 0 3 0x14200 syncxs systq 50072 350602 0 0 3 0x14200 tmoslp softclockmp 17143 445115 0 0 3 0x40014200 tmoslp softclock 95432 125545 0 0 3 0x40014200 idle0 1 211847 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 6311 (syz-executor) thread 0xffff80002a246a78 (164573) exclusive rwlock pf_lock r = 0 (0xffffffff8395a358) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 pfioctl+0x13ca sys/net/pf_ioctl.c:3238 #3 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537 #5 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 exclusive rwlock pfioctl_rw r = 0 (0xffffffff8395a3e8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 pfioctl+0x1d4 sys/net/pf_ioctl.c:2075 #3 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537 #5 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839ef040) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:520 #2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #4 Xsyscall+0x128 Process 69388 (systqmp) thread 0xffff8000ffffe7c8 (489774) shared rwlock systqmp r = 0 (0xffffffff8394afb8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 Process 40903 (systq) thread 0xffff8000ffffecf8 (35260) shared rwlock systq r = 0 (0xffffffff8394af18) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11054 12085K 12085K 166960K 12145 0 pcb 17 12K 12K 166960K 18 0 rtable 243 7K 7K 166960K 367 0 pf 34 17K 18K 166960K 45 0 ifaddr 43 7K 7K 166960K 45 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 70 0 ioctlops 1 2K 4K 166960K 1486 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1290 81K 81K 166960K 1362 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 138 0 proc 69 115K 164K 166960K 551 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 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 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 383 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 219 159K 168K 166960K 2941 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 42 84K 106K 166960K 1297 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 28 2K 2K 166960K 28 0 temp 36 9110K 9116K 166960K 3947 0 kqueue 13 20K 20K 166960K 25 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 vscsiccb 40 1 0 0 1 0 1 1 0 8 0 plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 34 0 30 1 0 1 1 0 8 0 rtentry 176 112 0 2 6 0 6 6 0 8 1 unpcb 144 43 0 23 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 8 0 4 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 67 0 60 1 0 1 1 0 8 0 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 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 18 0 0 1 0 1 1 0 8 0 pfstkey 128 18 0 0 1 0 1 1 0 8 0 pfstate 448 18 0 0 2 0 2 2 0 8 0 pfrule 1360 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 256 453 0 0 29 0 29 29 0 8 0 art_table 40 454 0 0 5 0 5 5 0 8 0 art_node 32 111 0 7 1 0 1 1 0 8 0 semapl 72 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1568 0 98 92 0 92 92 0 8 0 ffsino 296 1568 0 98 114 0 114 114 0 8 0 nchpl 144 1763 0 55 64 0 64 64 0 8 0 vnodes 216 1657 0 0 93 0 93 93 0 8 0 namei 1024 5406 0 5406 2 0 2 2 0 8 2 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 27 0 0 2 0 2 2 0 8 0 scxspl 216 6173 0 6172 3 1 2 2 1 8 1 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 456 0 409 7 0 7 7 0 8 1 knotepl 120 56 0 0 2 0 2 2 0 8 0 kqueuepl 224 21 0 12 1 0 1 1 0 8 0 pipepl 344 126 0 99 3 0 3 3 0 8 0 fdescpl 528 440 0 409 3 0 3 3 0 8 0 filepl 160 1564 0 1347 10 0 10 10 0 8 0 lockfpl 104 8 0 4 1 0 1 1 0 8 0 lockfspl 48 6 0 2 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 82 0 69 1 0 1 1 0 8 0 zombiepl 144 409 0 409 1 0 1 1 0 8 1 processpl 1232 456 0 409 5 0 5 5 0 8 1 procpl 664 468 0 413 5 0 5 5 0 8 0 sockpl 752 144 0 113 4 0 4 4 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 121 0 0 8 0 8 8 0 8 0 bufpl 280 2282 0 105 156 0 156 156 0 8 0 anonpl 32 3559 0 0 29 0 29 29 0 246 0 amapchunkpl 152 7861 0 7430 18 0 18 18 0 158 1 amappl16 200 1157 0 1146 4 0 4 4 0 8 3 amappl15 192 3 0 3 2 1 1 1 0 8 1 amappl14 184 495 0 494 1 0 1 1 0 8 0 amappl13 176 120 0 108 1 0 1 1 0 8 0 amappl12 168 688 0 659 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 0 1 1 0 8 1 amappl10 152 82 0 68 1 0 1 1 0 8 0 amappl9 144 282 0 282 1 0 1 1 0 8 1 amappl8 136 98 0 96 1 0 1 1 0 8 0 amappl7 128 143 0 130 1 0 1 1 0 8 0 amappl6 120 154 0 153 1 0 1 1 0 8 0 amappl5 112 96 0 85 1 0 1 1 0 8 0 amappl4 104 301 0 282 1 0 1 1 0 8 0 amappl3 96 1445 0 1343 3 0 3 3 0 8 0 amappl2 88 538 0 478 2 0 2 2 0 8 0 amappl1 80 10407 0 9809 15 0 15 15 0 8 0 amappl 88 2214 0 2067 4 0 4 4 0 92 0 uvmvnodes 80 101 0 0 3 0 3 3 0 8 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 440 0 409 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 440 0 409 1 0 1 1 0 8 0 vmmpekpl 168 5761 0 5734 2 0 2 2 0 8 0 vmmpepl 168 37215 0 35363 87 0 87 87 0 357 4 vmsppl 488 439 0 409 5 0 5 5 0 8 0 rwobjpl 80 13830 0 12845 24 0 24 24 0 8 2 pdppl 4096 887 0 818 97 12 85 85 0 8 16 pvpl 32 8860 0 0 73 1 72 72 0 265 0 pmappl 256 439 0 409 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 263 0 15 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffffffff8391e250,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(ffffffff8391e238,0) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 uvn_io(fffffd806c434dd0,ffff800032b9d6e8,1,202,0) at uvn_io+0x54c sys/uvm/uvm_vnode.c:1243 uvn_get(fffffd806c434dd0,0,ffff800032b9d7b8,ffff800032b9d79c,0,1,8a5d2a74b9d67da8,1) at uvn_get+0x31d sys/uvm/uvm_vnode.c:1075 uvm_fault_lower_io(ffff800032b9d9d0,ffff800032b9da08,ffff800032b9d850,ffff800032b9d838) at uvm_fault_lower_io+0x2ce sys/uvm/uvm_fault.c:1612 uvm_fault_lower(ffff800032b9d9d0,ffff800032b9da08,ffff800032b9d950) at uvm_fault_lower+0x28d sys/uvm/uvm_fault.c:1381 uvm_fault(fffffd806c6c43e8,200000000000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 kpageflttrap(ffff800032b9db80,200000000200) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff800032b9db80) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x5b pfioctl(24900,c4504441,ffff800001606000,1,ffff80002a246a78) at pfioctl+0x13ff sys/net/pf_ioctl.c:3238 VOP_IOCTL(fffffd806c510e60,c4504441,ffff800001606000,1,fffffd80097fd750,ffff80002a246a78) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806544f408,c4504441,ffff800001606000,ffff80002a246a78) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537 sys_ioctl(ffff80002a246a78,ffff800032b9e730,ffff800032b9e680) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff800032b9e730) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032b9e730) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd34da672d90, count: -18 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff839ee840) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839ee840) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 ktrsyscall(ffff80002a223238,5b,10,ffff80002a3081b0) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a223238,5b,10,ffff80002a3081b0) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a3081b0) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a3081b0) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7880d3b29b60, count: -8