witness: lock order reversal: 1st 0xffffffff829628c0 pf_lock (pf_lock) 2nd 0xffffffff82981560 netlock (netlock) lock order "netlock"(rwlock) -> "pf_lock"(rwlock) first seen at: #0 rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 #1 pfioctl+0x3fba sys/net/pf_ioctl.c:2966 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 lock order "pf_lock"(rwlock) -> "netlock"(rwlock) first seen at: #0 rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 #1 uvn_io+0x418 sys/uvm/uvm_vnode.c:1243 #2 uvn_get+0x1df sys/uvm/uvm_vnode.c:1076 #3 uvm_fault_lower+0x36c sys/uvm/uvm_fault.c:1275 #4 uvm_fault+0x248 #5 kpageflttrap+0x209 #6 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #7 alltraps_kern_meltdown+0x7b #8 copyout+0x53 #9 pfioctl+0x47a6 sys/net/pf_ioctl.c:2938 #10 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #11 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #12 sys_ioctl+0x4a2 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 Stopped at db_enter+0x18: 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+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffffffff82981560,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffffffff82981560,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_write(ffffffff82981550) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 uvn_io(fffffd807168e148,ffff80002e4185e8,1,202,0) at uvn_io+0x418 sys/uvm/uvm_vnode.c:1243 uvn_get(fffffd807168e148,1000,ffff80002e4186a8,ffff80002e418678,0,2,79bdfa79e9fd07c7,0) at uvn_get+0x1df sys/uvm/uvm_vnode.c:1076 uvm_fault_lower(ffff80002e418810,ffff80002e418848,ffff80002e418790,0) at uvm_fault_lower+0x36c sys/uvm/uvm_fault.c:1275 uvm_fault(fffffd806c1825d0,20001000,0,2) at uvm_fault+0x248 kpageflttrap(ffff80002e4189a0,20001000) at kpageflttrap+0x209 kerntrap(ffff80002e4189a0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 pfioctl(4900,c0284457,ffff80002e418e00,5,ffff8000ffff57a0) at pfioctl+0x47a6 sys/net/pf_ioctl.c:2938 VOP_IOCTL(fffffd8077752d48,c0284457,ffff80002e418e00,5,fffffd807f7d8720,ffff8000ffff57a0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807742c010,c0284457,ffff80002e418e00,ffff8000ffff57a0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff57a0,ffff80002e418f18,ffff80002e418f70) at sys_ioctl+0x4a2 syscall(ffff80002e418fe0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e418fe0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa22b997a7e0, count: -17 ddb{0}> show registers rdi 0x3 rsi 0xffffffff82924900 __sancov_gen_cov_switch_values.134 rbp 0xffff80002e4183b0 rbx 0x3 rdx 0 rcx 0 rax 0xffff8000ffff57a0 r8 0xffff80002e418320 r9 0x8080808080808080 r10 0x68ada8fd3b8a76e6 r11 0x63db67c6e5c8a8af r12 0xffffffff82a5a310 w_lodata+0x52960 r13 0 r14 0xffffffff82a500d0 w_lodata+0x48720 r15 0xfffffd8002f4b780 rip 0xffffffff81695c68 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e4183a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.3) pid=40440 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002c918010,0xffff80002c919520 process=0xffff80002e3b2dd8 user=0xffff80002e414000, vmspace=0xfffffd806c1825d0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3515 165482 14025 0 2 0 syz-executor.6 3515 177938 14025 0 7 0x4000000 syz-executor.6 35955 122035 43905 0 2 0 syz-executor.1 35955 466965 43905 0 3 0x4000080 fsleep syz-executor.1 80908 349777 18017 0 2 0 syz-executor.5 80908 154739 18017 0 3 0x4000080 fsleep syz-executor.5 79931 192454 73202 0 2 0x81000 syz-executor.4 79931 215778 73202 0 3 0x4003000 suspend syz-executor.4 37957 363345 44773 0 2 0 syz-executor.3 37957 329942 44773 0 2 0x4000000 syz-executor.3 37957 222123 44773 0 3 0x4000080 fsleep syz-executor.3 *37957 40440 44773 0 7 0x4000000 syz-executor.3 11620 308309 88197 0 2 0 syz-executor.2 11620 433350 88197 0 3 0x4000080 fsleep syz-executor.2 11620 62451 88197 0 3 0x4000080 fsleep syz-executor.2 49856 370398 17287 0 2 0 syz-executor.0 49856 286397 17287 0 2 0x4000000 syz-executor.0 98792 196190 66206 0 2 0 syz-executor.7 98792 247601 66206 0 2 0x4000000 syz-executor.7 73202 104900 59147 0 3 0x82 nanoslp syz-executor.4 32512 206893 0 0 3 0x14200 bored sosplice 34579 249386 0 0 3 0x14280 nfsidl nfsio 18908 469222 0 0 3 0x14280 nfsidl nfsio 96616 407556 0 0 3 0x14280 nfsidl nfsio 19245 207319 0 0 3 0x14280 nfsidl nfsio 10995 196696 0 0 3 0x14280 nfsidl nfsio 97406 382914 0 0 3 0x14280 nfsidl nfsio 52846 56623 0 0 3 0x14280 nfsidl nfsio 88910 138677 0 0 3 0x14280 nfsidl nfsio 37764 155563 0 0 3 0x14280 nfsidl nfsio 68352 141863 0 0 3 0x14280 nfsidl nfsio 53893 6865 0 0 3 0x14280 nfsidl nfsio 89999 218417 0 0 3 0x14280 nfsidl nfsio 64142 426082 0 0 3 0x14280 nfsidl nfsio 12832 341401 0 0 3 0x14280 nfsidl nfsio 22420 86518 0 0 3 0x14280 nfsidl nfsio 63557 75444 0 0 3 0x14280 nfsidl nfsio 55500 351458 0 0 3 0x14280 nfsidl nfsio 3454 69609 0 0 3 0x14280 nfsidl nfsio 70391 484602 0 0 3 0x14280 nfsidl nfsio 96935 467919 0 0 3 0x14280 nfsidl nfsio 66206 494298 59147 0 3 0x82 nanoslp syz-executor.7 14025 8977 59147 0 3 0x82 nanoslp syz-executor.6 18017 420756 59147 0 3 0x82 nanoslp syz-executor.5 44773 328732 59147 0 3 0x82 nanoslp syz-executor.3 88197 386013 59147 0 3 0x82 nanoslp syz-executor.2 43905 130987 59147 0 3 0x82 nanoslp syz-executor.1 17287 338861 59147 0 2 0x2 syz-executor.0 59147 463593 65004 0 3 0x82 thrsleep syz-fuzzer 59147 379440 65004 0 3 0x4000082 thrsleep syz-fuzzer 59147 514655 65004 0 3 0x4000082 thrsleep syz-fuzzer 59147 401999 65004 0 3 0x4000082 thrsleep syz-fuzzer 59147 523527 65004 0 3 0x4000082 thrsleep syz-fuzzer 59147 2017 65004 0 3 0x4000082 thrsleep syz-fuzzer 59147 433058 65004 0 3 0x4000082 kqread syz-fuzzer 59147 82620 65004 0 3 0x4000082 thrsleep syz-fuzzer 65004 65753 47513 0 3 0x10008a sigsusp ksh 47513 278695 22621 0 3 0x9a kqread sshd 53461 105628 1 0 3 0x100083 ttyin getty 22621 467989 1 0 3 0x88 kqread sshd 10187 39698 98265 74 3 0x1100092 bpf pflogd 98265 505825 1 0 3 0x80 netio pflogd 56242 495108 78286 73 3 0x1100090 kqread syslogd 78286 503815 1 0 3 0x100082 netio syslogd 39844 465386 1 0 3 0x100080 kqread resolvd 77577 214430 59194 77 3 0x100092 kqread dhcpleased 6140 374633 59194 77 3 0x100092 kqread dhcpleased 59194 438483 1 0 3 0x80 kqread dhcpleased 10140 178656 0 0 3 0x14200 bored smr 22250 394817 0 0 2 0x14200 zerothread 43057 53581 0 0 3 0x14200 aiodoned aiodoned 45881 487626 0 0 3 0x14200 syncer update 39908 419353 0 0 3 0x14200 cleaner cleaner 16041 78204 0 0 3 0x14200 reaper reaper 83836 401116 0 0 3 0x14200 pgdaemon pagedaemon 7354 104026 0 0 3 0x14200 bored viomb 71532 499354 0 0 3 0x40014200 acpi0 acpi0 37983 272747 0 0 3 0x40014200 idle1 8991 294840 0 0 3 0x14200 bored softnet 4004 398743 0 0 3 0x14200 bored systqmp 77199 37121 0 0 3 0x14200 bored systq 3722 19169 0 0 3 0x40014200 bored softclock 33498 339036 0 0 3 0x40014200 idle0 1 99278 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 37957 (syz-executor.3) thread 0xffff8000ffff57a0 (40440) exclusive rwlock pf_lock r = 0 (0xffffffff829628c0) #0 witness_lock+0x44d #1 pfioctl+0x4794 sys/net/pf_ioctl.c:2937 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829b6998) #0 witness_lock+0x44d #1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x4a2 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10188 6475K 6671K 78643K 12352 0 pcb 13 12K 13K 78643K 79 0 rtable 227 8K 10K 78643K 466 0 ifaddr 92 19K 19K 78643K 370 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 76 0 ioctlops 0 0K 8K 78643K 1667 0 iov 0 0K 28K 78643K 1313 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1333 83K 84K 78643K 1783 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 19 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 446 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 18 65K 89K 78643K 1308 0 sigio 0 0K 0K 78643K 22 0 proc 71 87K 123K 78643K 547 0 subproc 104 6K 6K 78643K 117 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 154 0 in_multi 102 6K 6K 78643K 122 0 ether_multi 1 0K 0K 78643K 1 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 109 493K 493K 78643K 109 0 exec 0 0K 2K 78643K 696 0 tdb 3 0K 0K 78643K 3 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 359 132K 145K 78643K 18351 0 UVM aobj 62 2K 2K 78643K 64 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 47 0 NDP 12 0K 2K 78643K 40 0 temp 129 4704K 8800K 78643K 7695 0 kqueue 12 18K 24K 78643K 78 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 22 0 0 1 0 1 1 0 8 0 rtpcb 120 44 0 41 1 0 1 1 0 8 0 rtentry 112 131 0 30 4 0 4 4 0 8 0 unpcb 136 830 0 815 11 6 5 6 0 8 4 syncache 296 8 0 8 3 3 0 1 0 8 0 tcpqe 32 293 0 293 1 1 0 1 0 8 0 tcpcb 736 403 0 360 20 16 4 13 0 8 0 arp 120 21 0 2 1 0 1 1 0 8 0 inpcb 304 1742 0 1633 22 13 9 9 0 8 0 nd6 48 28 0 4 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1248 3 0 3 1 1 0 1 0 8 0 pffrent 40 4 0 4 1 1 0 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 pfrktable 1344 27 0 24 2 1 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 264 3 0 3 1 1 0 1 0 8 0 pfstitem 24 36 0 15 1 0 1 1 0 8 0 pfstkey 112 38 0 17 1 0 1 1 0 8 0 pfstate 320 36 0 15 3 0 3 3 0 8 0 pfrule 1360 107 0 90 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 576 0 153 29 0 29 29 0 8 2 art_table 32 577 0 153 4 0 4 4 0 8 0 art_node 16 130 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 2 1 1 1 0 8 0 semapl 112 444 0 434 1 0 1 1 0 8 0 shmpl 112 61 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3124 0 1688 90 0 90 90 0 8 0 ffsino 272 3124 0 1688 96 0 96 96 0 8 0 nchpl 144 4997 0 3362 63 0 63 63 0 8 0 uvmvnodes 80 3603 0 0 74 0 74 74 0 8 0 vnodes 224 3603 0 0 212 0 212 212 0 8 0 namei 1024 17242 0 17242 3 2 1 2 0 8 1 percpumem 16 50 0 10 1 0 1 1 0 8 0 vcpupl 2048 4 0 0 1 0 1 1 0 8 0 vmpool 560 7 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 11 0 9 2 1 1 1 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 13904 0 13904 9 8 1 8 0 8 1 plimitpl 152 146 0 131 1 0 1 1 0 8 0 sigapl 424 1631 0 1565 8 0 8 8 0 8 0 futexpl 64 12356 0 12351 2 1 1 1 0 8 0 knotepl 120 115 0 0 4 0 4 4 0 8 0 kqueuepl 216 168 0 160 3 2 1 3 0 8 0 pipepl 336 423 0 395 14 11 3 9 0 8 0 fdescpl 496 1596 0 1565 5 0 5 5 0 8 0 filepl 152 10798 0 10421 29 13 16 18 0 8 1 lockfpl 104 1326 0 1321 2 1 1 2 0 8 0 lockfspl 48 382 0 378 1 0 1 1 0 8 0 sessionpl 144 25 0 8 1 0 1 1 0 8 0 pgrppl 48 28 0 11 1 0 1 1 0 8 0 ucredpl 96 912 0 900 1 0 1 1 0 8 0 zombiepl 144 1566 0 1565 1 0 1 1 0 8 0 processpl 1064 1631 0 1565 5 0 5 5 0 8 0 procpl 672 3750 0 3666 9 1 8 9 0 8 0 sosppl 168 3 0 3 1 1 0 1 0 8 0 sockpl 480 2616 0 2492 65 49 16 20 0 8 0 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 11 0 0 2 0 2 2 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 187 0 0 23 0 23 23 0 8 0 mtagpl 96 138 0 0 4 0 4 4 0 8 0 mbufpl 256 380 0 0 24 1 23 23 0 8 0 bufpl 288 5056 0 149 351 0 351 351 0 8 0 anonpl 24 410613 0 393172 146 23 123 142 0 186 5 amapchunkpl 152 42902 0 42002 41 1 40 40 0 158 5 amappl16 200 4537 0 3959 56 16 40 43 0 8 9 amappl15 192 381 0 376 1 0 1 1 0 8 0 amappl14 184 318 0 308 1 0 1 1 0 8 0 amappl13 176 87 0 86 1 0 1 1 0 8 0 amappl12 168 35 0 27 1 0 1 1 0 8 0 amappl11 160 228 0 210 1 0 1 1 0 8 0 amappl10 152 178 0 173 1 0 1 1 0 8 0 amappl9 144 898 0 889 1 0 1 1 0 8 0 amappl8 136 740 0 690 2 0 2 2 0 8 0 amappl7 128 261 0 249 1 0 1 1 0 8 0 amappl6 120 652 0 630 2 1 1 2 0 8 0 amappl5 112 1086 0 1067 1 0 1 1 0 8 0 amappl4 104 1491 0 1458 2 1 1 2 0 8 0 amappl3 96 264 0 252 1 0 1 1 0 8 0 amappl2 88 597 0 552 3 1 2 3 0 8 0 amappl1 80 32251 0 31626 19 5 14 19 0 8 0 amappl 88 17645 0 17357 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 63 0 2 2 0 2 2 0 8 0 uaddrrnd 24 1603 0 1568 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1603 0 1568 1 0 1 1 0 8 0 vmmpekpl 168 16450 0 16399 3 0 3 3 0 8 0 vmmpepl 168 148751 0 146041 150 25 125 141 0 357 7 vmsppl 368 1602 0 1568 4 0 4 4 0 8 0 rwobjpl 56 41178 0 35906 79 2 77 77 0 8 0 pdppl 4096 3213 0 3140 134 61 73 81 0 8 0 pvpl 32 792721 0 770726 252 47 205 247 0 265 10 pmappl 248 1602 0 1568 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 806 0 94 21 0 21 21 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:440 witness_checkorder(ffffffff82981560,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffffffff82981560,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_write(ffffffff82981550) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 uvn_io(fffffd807168e148,ffff80002e4185e8,1,202,0) at uvn_io+0x418 sys/uvm/uvm_vnode.c:1243 uvn_get(fffffd807168e148,1000,ffff80002e4186a8,ffff80002e418678,0,2,79bdfa79e9fd07c7,0) at uvn_get+0x1df sys/uvm/uvm_vnode.c:1076 uvm_fault_lower(ffff80002e418810,ffff80002e418848,ffff80002e418790,0) at uvm_fault_lower+0x36c sys/uvm/uvm_fault.c:1275 uvm_fault(fffffd806c1825d0,20001000,0,2) at uvm_fault+0x248 kpageflttrap(ffff80002e4189a0,20001000) at kpageflttrap+0x209 kerntrap(ffff80002e4189a0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 pfioctl(4900,c0284457,ffff80002e418e00,5,ffff8000ffff57a0) at pfioctl+0x47a6 sys/net/pf_ioctl.c:2938 VOP_IOCTL(fffffd8077752d48,c0284457,ffff80002e418e00,5,fffffd807f7d8720,ffff8000ffff57a0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807742c010,c0284457,ffff80002e418e00,ffff8000ffff57a0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff57a0,ffff80002e418f18,ffff80002e418f70) at sys_ioctl+0x4a2 syscall(ffff80002e418fe0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e418fe0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa22b997a7e0, count: -17 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff829b6790) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829b6790) at __mp_lock+0x12e sys/kern/kern_lock.c:147 end trace frame: 0x0, count: -4