login: witness: lock order reversal: 1st 0xffffffff8290fe50 netlock (netlock) 2nd 0xfffffd8066b93d20 vmmaplk (&map->lock) lock order "&map->lock"(rwlock) -> "netlock"(rwlock) first seen at: #0 rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 #1 udp_sysctl+0x8a sys/netinet/udp_usrreq.c:1269 #2 sys_sysctl+0x209 sys/kern/kern_sysctl.c:249 #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 lock order "netlock"(rwlock) -> "&map->lock"(rwlock) first seen at: #0 rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 kpageflttrap+0x209 #5 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x53 #8 ifioctl_get+0x2dd #9 soo_ioctl+0x26c #10 fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 #11 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #12 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #13 sys_ioctl+0x4a2 #14 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #15 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(fffffd8066b93d20,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd8066b93d20,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd8066b93d10) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff8000280fc0d0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff8000280fc0d0,ffff8000280fc108,ffff8000280fc130) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd8066b93d08,2000c000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff8000280fc260,2000cf00) at kpageflttrap+0x209 kerntrap(ffff8000280fc260) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 ifioctl_get(c0106924,ffff8000280fc7b0) at ifioctl_get+0x2dd soo_ioctl(ffff8000280fc510,c0106924,ffff8000280fc7b0,ffff8000fffecfd0) at soo_ioctl+0x26c fifo_ioctl(ffff8000280fc5f8) at fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 VOP_IOCTL(fffffd80631a8be8,c0106924,ffff8000280fc7b0,3,fffffd807f7d8120,ffff8000fffecfd0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8066da2ef0,c0106924,ffff8000280fc7b0,ffff8000fffecfd0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000fffecfd0,ffff8000280fc8c8,ffff8000280fc920) at sys_ioctl+0x4a2 syscall(ffff8000280fc990) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000280fc990) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf7cd1079a50, count: -18 ddb{0}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be68 rbp 0xffff8000280fbdc0 rbx 0x3 rdx 0xffff800000bc1bc0 rcx 0 rax 0x3ffff acpi_pdirpa+0x2be67 r8 0xffff8000280fbd30 r9 0x8080808080808080 r10 0xb1a9365131ef946c r11 0xf633c76f4565dc29 r12 0xffffffff82ab0590 w_lodata+0x52c20 r13 0 r14 0xffffffff82aaae40 w_lodata+0x4d4d0 r15 0xfffffd8002f62d80 rip 0xffffffff8138d658 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000280fbdb0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=255285 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffefa48,0xffff8000fffec800 process=0xffff8000fffeadd8 user=0xffff8000280f7000, vmspace=0xfffffd8066b93d08 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 60824 58439 73940 32767 7 0x10 syz-executor.5 60824 255552 73940 32767 3 0x4000090 fsleep syz-executor.5 48756 85746 40893 32767 2 0x10 syz-executor.6 48756 493855 40893 32767 3 0x4000090 semwait syz-executor.6 27093 148139 97048 32767 2 0x10 syz-executor.3 27093 253352 97048 32767 2 0x4000010 syz-executor.3 89620 465505 51248 32767 2 0x10 syz-executor.1 *89620 255285 51248 32767 7 0x4000010 syz-executor.1 38955 479688 31568 32767 3 0x90 nanoslp syz-executor.0 38955 484069 31568 32767 3 0x4000090 msgwait syz-executor.0 38955 130439 31568 32767 3 0x4000090 fsleep syz-executor.0 55325 49027 58216 32767 3 0x90 nanoslp syz-executor.4 73940 521738 50530 32767 3 0x90 nanoslp syz-executor.5 94460 373513 59230 32767 2 0x10 syz-executor.7 40893 271524 90395 32767 3 0x90 nanoslp syz-executor.6 59230 20442 23769 0 3 0x82 wait syz-executor.7 90395 427881 23769 0 3 0x82 wait syz-executor.6 50530 436212 23769 0 3 0x82 wait syz-executor.5 97048 329190 13223 32767 3 0x90 nanoslp syz-executor.3 58216 233507 23769 0 3 0x82 wait syz-executor.4 38845 107719 24097 32767 3 0x90 nanoslp syz-executor.2 13223 302386 23769 0 3 0x82 wait syz-executor.3 51248 57666 49199 32767 3 0x90 nanoslp syz-executor.1 24097 461671 23769 0 3 0x82 wait syz-executor.2 49199 312830 23769 0 3 0x82 wait syz-executor.1 31568 268052 47715 32767 3 0x90 nanoslp syz-executor.0 47715 400243 23769 0 3 0x82 wait syz-executor.0 23769 207240 5026 0 3 0x82 kqread syz-fuzzer 23769 402602 5026 0 3 0x4000082 nanoslp syz-fuzzer 23769 130538 5026 0 3 0x4000082 thrsleep syz-fuzzer 23769 183123 5026 0 3 0x4000082 thrsleep syz-fuzzer 23769 349813 5026 0 3 0x4000082 nanoslp syz-fuzzer 23769 514968 5026 0 3 0x4000082 thrsleep syz-fuzzer 23769 26441 5026 0 3 0x4000082 thrsleep syz-fuzzer 23769 421786 5026 0 3 0x4000082 thrsleep syz-fuzzer 5026 242038 18861 0 3 0x10008a sigsusp ksh 18861 414208 52530 0 3 0x9a kqread sshd 96751 370904 1 0 3 0x100083 ttyin getty 52530 420703 1 0 3 0x88 kqread sshd 66592 165003 84650 73 3 0x1100090 kqread syslogd 84650 419741 1 0 3 0x100082 netio syslogd 17783 366652 1 0 3 0x100080 kqread resolvd 63684 290419 59279 77 3 0x100092 kqread dhcpleased 90420 230981 59279 77 3 0x100092 kqread dhcpleased 59279 330854 1 0 3 0x80 kqread dhcpleased 82161 210048 0 0 3 0x14200 bored smr 56925 198503 0 0 2 0x14200 zerothread 69171 244927 0 0 3 0x14200 aiodoned aiodoned 96020 310119 0 0 3 0x14200 syncer update 2288 483846 0 0 3 0x14200 cleaner cleaner 1022 45446 0 0 3 0x14200 reaper reaper 25182 288366 0 0 3 0x14200 pgdaemon pagedaemon 85780 382693 0 0 3 0x14200 bored viomb 33164 229256 0 0 3 0x40014200 acpi0 acpi0 3793 240529 0 0 3 0x40014200 idle1 12068 696 0 0 3 0x14200 bored softnet 52339 215693 0 0 3 0x14200 bored systqmp 87631 506670 0 0 3 0x14200 bored systq 75038 461683 0 0 3 0x40014200 bored softclock 44398 83039 0 0 3 0x40014200 idle0 1 187141 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 60824 (syz-executor.5) thread 0xffff8000fffefa48 (58439) shared rwlock vmmaplk r = 0 (0xfffffd8066b93bb0) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 Process 89620 (syz-executor.1) thread 0xffff8000fffecfd0 (255285) shared rwlock netlock r = 0 (0xffffffff8290fe50) #0 witness_lock+0x44d #1 ifioctl_get+0x2d5 sys/net/if.c:2319 #2 soo_ioctl+0x26c #3 fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 #4 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x4a2 #7 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #7 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829de988) #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 Process 94460 (syz-executor.7) thread 0xffff8000ffff4000 (373513) exclusive rrwlock inode r = 0 (0xfffffd8066e31818) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807ea1a3d0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10171 6407K 6419K 78643K 11261 0 pcb 13 8K 8K 78643K 13 0 rtable 238 6K 7K 78643K 351 0 ifaddr 81 16K 16K 78643K 82 0 counters 56 35K 35K 78643K 56 0 ioctlops 0 0K 2K 78643K 33 0 iov 0 0K 8K 78643K 8 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1271 79K 79K 78643K 1289 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 12 0K 0K 78643K 21 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 117K 78643K 393 0 proc 56 74K 99K 78643K 460 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 31 0 in_multi 99 6K 6K 78643K 107 0 ether_multi 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 2K 78643K 619 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 308 84K 86K 78643K 6024 0 UVM aobj 10 2K 2K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 3 0 NDP 11 0K 2K 78643K 27 0 temp 90 4694K 4758K 78643K 4701 0 kqueue 12 18K 22K 78643K 36 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 37 0 34 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 136 95 0 80 1 0 1 1 0 8 0 syncache 296 15 0 15 2 1 1 1 0 8 1 tcpqe 32 708 0 708 2 1 1 2 0 8 1 tcpcb 736 101 0 77 3 0 3 3 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 304 183 0 174 2 0 2 2 0 8 1 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 3 0 3 1 0 1 1 0 8 1 nd6 48 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 2 0 1 1 0 1 1 0 8 0 semapl 112 11 0 1 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1756 0 327 90 0 90 90 0 8 0 ffsino 272 1756 0 327 96 0 96 96 0 8 0 nchpl 144 2289 0 625 62 0 62 62 0 8 0 uvmvnodes 80 1869 0 0 39 0 39 39 0 8 0 vnodes 224 1869 0 0 110 0 110 110 0 8 0 namei 1024 7062 0 7061 2 1 1 2 0 8 0 percpumem 16 40 0 0 1 0 1 1 0 8 0 scxspl 216 7240 0 7240 9 1 8 8 0 8 8 plimitpl 152 35 0 13 1 0 1 1 0 8 0 sigapl 424 667 0 617 7 0 7 7 0 8 1 futexpl 64 1324 0 1322 1 0 1 1 0 8 0 knotepl 120 114 0 0 4 0 4 4 0 8 0 kqueuepl 216 37 0 29 1 0 1 1 0 8 0 pipepl 336 139 0 111 4 1 3 3 0 8 0 fdescpl 496 653 0 619 7 1 6 6 0 8 1 filepl 152 2120 0 1885 10 0 10 10 0 8 0 lockfpl 104 24 0 22 1 0 1 1 0 8 0 lockfspl 48 11 0 9 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 7 1 0 1 1 0 8 0 ucredpl 96 160 0 142 1 0 1 1 0 8 0 zombiepl 144 619 0 617 1 0 1 1 0 8 0 processpl 1064 667 0 617 5 1 4 4 0 8 0 procpl 672 962 0 899 6 0 6 6 0 8 0 sockpl 480 316 0 289 5 0 5 5 0 8 1 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 215 0 0 26 0 26 26 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 423 0 0 26 0 26 26 0 8 0 bufpl 288 3920 0 138 271 0 271 271 0 8 0 anonpl 24 126283 0 114115 81 3 78 78 0 186 1 amapchunkpl 152 13657 0 12913 33 1 32 32 0 158 1 amappl16 200 946 0 662 17 1 16 16 0 8 0 amappl15 192 150 0 145 1 0 1 1 0 8 0 amappl14 184 112 0 103 1 0 1 1 0 8 0 amappl13 176 79 0 78 1 0 1 1 0 8 0 amappl12 168 91 0 84 2 1 1 1 0 8 0 amappl11 160 72 0 58 1 0 1 1 0 8 0 amappl10 152 95 0 86 1 0 1 1 0 8 0 amappl9 144 449 0 444 1 0 1 1 0 8 0 amappl8 136 577 0 533 2 0 2 2 0 8 0 amappl7 128 153 0 140 1 0 1 1 0 8 0 amappl6 120 234 0 214 2 1 1 2 0 8 0 amappl5 112 489 0 469 1 0 1 1 0 8 0 amappl4 104 883 0 852 1 0 1 1 0 8 0 amappl3 96 247 0 231 1 0 1 1 0 8 0 amappl2 88 543 0 499 3 1 2 3 0 8 0 amappl1 80 14328 0 13705 18 4 14 18 0 8 0 amappl 88 5599 0 5352 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 653 0 619 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 653 0 619 1 0 1 1 0 8 0 vmmpekpl 168 9105 0 9060 3 0 3 3 0 8 0 vmmpepl 168 61308 0 58875 117 0 117 117 0 357 1 vmsppl 368 652 0 619 4 0 4 4 0 8 0 rwobjpl 56 17007 0 13927 44 0 44 44 0 8 0 pdppl 4096 1313 0 1238 109 28 81 91 0 8 6 pvpl 32 350177 0 333040 244 9 235 243 0 265 91 pmappl 248 652 0 619 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 672 0 32 19 0 19 19 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(fffffd8066b93d20,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd8066b93d20,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd8066b93d10) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff8000280fc0d0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff8000280fc0d0,ffff8000280fc108,ffff8000280fc130) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd8066b93d08,2000c000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff8000280fc260,2000cf00) at kpageflttrap+0x209 kerntrap(ffff8000280fc260) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 ifioctl_get(c0106924,ffff8000280fc7b0) at ifioctl_get+0x2dd soo_ioctl(ffff8000280fc510,c0106924,ffff8000280fc7b0,ffff8000fffecfd0) at soo_ioctl+0x26c fifo_ioctl(ffff8000280fc5f8) at fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 VOP_IOCTL(fffffd80631a8be8,c0106924,ffff8000280fc7b0,3,fffffd807f7d8120,ffff8000fffecfd0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8066da2ef0,c0106924,ffff8000280fc7b0,ffff8000fffecfd0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000fffecfd0,ffff8000280fc8c8,ffff8000280fc920) at sys_ioctl+0x4a2 syscall(ffff8000280fc990) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000280fc990) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf7cd1079a50, count: -18 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff829de780) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829de780) at __mp_lock+0x133 sys/kern/kern_lock.c:147 uvm_fault(fffffd8066b93b98,d1c78577000,0,1) at uvm_fault+0x191 sys/uvm/uvm_fault.c:624 upageflttrap(ffff80002e37c740,d1c78577000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002e37c740) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffbe050, count: -9