uvm_fault(0xfffffd806c990d70, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81db49d8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff8000347d79c0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81db49d8 Starting stack trace... panic(ffffffff833deb52) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000347d7910) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000161b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003abe47f0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003abe47f0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000347d7ac0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062732de0,81,fffffd80097fd618,ffff80003abe47f0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c794e00,ffff80003abe47f0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c794e00,ffff80003abe47f0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c794e00,ffff80003abe47f0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c794e00,ffff80003abe47f0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003abe47f0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003abe47f0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003abe47f0,ffff8000347d7e30,ffff8000347d7d80) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000347d7e30) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000347d7e30) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75159e969e80, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *232126 54148 0 0 0 1 syz-executor 138547 81370 0 0 0x4000000 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71ad79e9b4e0, count: 14 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{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806c990d70, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71ad79e9b4e0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c41d6a0 rbx 0 rdx 0 rcx 0xffff80003abe4a88 rax 0x2a r8 0xffff80003c41d5d0 r9 0x1 r10 0xfc1554e7094d65d r11 0x26b04d665548ff1b r12 0 r13 0 r14 0 r15 0 rip 0xffffffff820c94c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c41d620 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=232126 pid=54148 tcnt=1 stat=onproc flags process=0 proc=0 runpri=81, usrpri=81, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003abe5250,0xffff80003abe4d30 process=0xffff80003c4161d0 user=0xffff80003c418000, vmspace=0xfffffd806c9907b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *54148 232126 41766 0 7 0 syz-executor 81370 81548 11286 0 3 0x80 fsleep syz-executor 81370 138547 11286 0 7 0x4000000 syz-executor 8929 466415 13714 0 3 0x80 fsleep syz-executor 8929 231888 13714 0 3 0x4000000 biowait syz-executor 63975 153926 23325 0 3 0x80 fsleep syz-executor 63975 446767 23325 0 3 0x4000080 kqsel syz-executor 63975 454691 23325 0 3 0x4000080 fsleep syz-executor 63975 512163 23325 0 3 0x4000080 fsleep syz-executor 63962 49869 25747 0 3 0x80 fsleep syz-executor 63962 46190 25747 0 3 0x4000080 lockf syz-executor 10308 176323 86109 0 3 0x80 fsleep syz-executor 10308 107947 86109 0 3 0x4000080 ttyin syz-executor 10308 123663 86109 0 3 0x4000080 fsleep syz-executor 5616 263327 0 0 3 0x14200 acct acct 26131 210253 0 0 3 0x14280 nfsidl nfsio 84334 121508 0 0 3 0x14280 nfsidl nfsio 71927 451380 0 0 3 0x14280 nfsidl nfsio 75152 415769 0 0 3 0x14280 nfsidl nfsio 23325 326899 45396 0 3 0x82 nanoslp syz-executor 25509 352653 45396 0 3 0x82 nanoslp syz-executor 13714 520635 45396 0 3 0x82 nanoslp syz-executor 25747 396233 45396 0 3 0x82 nanoslp syz-executor 41766 429803 45396 0 3 0x82 nanoslp syz-executor 62876 23937 45396 0 3 0x82 nanoslp syz-executor 11286 477429 45396 0 3 0x82 nanoslp syz-executor 86109 129138 45396 0 3 0x82 nanoslp syz-executor 45396 125614 97434 0 3 0x82 kqread syz-executor 97434 286368 39336 0 3 0x10008a sigsusp ksh 39336 38146 71846 0 3 0x98 kqread sshd-session 71846 142824 78471 0 3 0x92 kqread sshd-session 12642 87915 1 0 3 0x100083 ttyopn getty 78471 318916 1 0 3 0x88 kqread sshd 43309 316111 3256 74 3 0x1100092 bpf pflogd 3256 444711 1 0 3 0x80 sbwait pflogd 50144 442825 10855 73 3 0x1100090 kqread syslogd 10855 210568 1 0 3 0x100082 sbwait syslogd 42059 292308 1 0 3 0x100080 kqread resolvd 55362 107813 41789 77 3 0x100092 kqread dhcpleased 86739 465223 41789 77 3 0x100092 kqread dhcpleased 41789 434237 1 0 3 0x80 kqread dhcpleased 60396 19038 0 0 3 0x14200 bored smr 42101 329996 0 0 3 0x14200 pgzero zerothread 19631 143757 0 0 3 0x14200 aiodoned aiodoned 49830 325821 0 0 3 0x14200 syncer update 63494 284094 0 0 3 0x14200 cleaner cleaner 43886 309743 0 0 3 0x14200 reaper reaper 1208 201967 0 0 3 0x14200 pgdaemon pagedaemon 74235 38683 0 0 3 0x14200 bored viomb 5096 268142 0 0 3 0x40014200 acpi0 acpi0 49533 256396 0 0 3 0x40014200 idle1 75401 114194 0 0 3 0x14200 bored softnet1 39717 161841 0 0 3 0x14200 netlock softnet0 47436 310755 0 0 3 0x14200 smrbar systqmp 41987 449561 0 0 3 0x14200 bored systq 60920 425192 0 0 3 0x14200 tmoslp softclockmp 30239 51125 0 0 3 0x40014200 tmoslp softclock 18741 5948 0 0 3 0x40014200 idle0 1 52314 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 8929 (syz-executor) thread 0xffff80003abe5250 (231888) exclusive rrwlock inode r = 0 (0xfffffd806f7bda20) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e78eef8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 47436 (systqmp) thread 0xffff8000ffffe298 (310755) shared rwlock systqmp r = 0 (0xffffffff838a7d18) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11077 12156K 12352K 166960K 12856 0 pcb 17 13K 14K 166960K 164 0 rtable 218 8K 10K 166960K 433 0 pf 36 18K 19K 166960K 90 0 ifaddr 39 6K 8K 166960K 74 0 ifgroup 53 2K 2K 166960K 118 0 sysctl 4 1K 9K 166960K 10 0 counters 72 37K 38K 166960K 128 0 ioctlops 0 0K 4K 166960K 1537 0 iov 0 0K 20K 166960K 40 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1399 88K 88K 166960K 1807 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 14 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 604 0 sigio 0 0K 0K 166960K 7 0 proc 75 131K 164K 166960K 565 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 119 0 in_multi 85 6K 7K 166960K 118 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 476 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 252 163K 173K 166960K 7198 0 UVM aobj 13 4K 6K 166960K 14 0 pinsyscall 43 86K 106K 166960K 1728 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 52 0 NDP 12 0K 2K 166960K 49 0 temp 62 8675K 8743K 166960K 14034 0 kqueue 13 20K 29K 166960K 122 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 73 0 69 1 0 1 1 0 8 0 rtentry 176 123 0 31 6 0 6 6 0 8 0 unpcb 144 436 0 419 5 3 2 3 0 8 1 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpcb 736 98 0 92 1 0 1 1 0 8 0 arp 136 20 0 2 1 0 1 1 0 8 0 inpcb 328 564 0 554 8 6 2 7 0 8 0 nd6 152 27 0 4 2 0 2 2 0 8 0 pkpcb 40 3 0 3 2 2 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 22 0 20 2 1 1 1 0 8 0 pppxif 1504 3 0 3 2 1 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 1 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 4 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 0 1 0 1 1 0 8 0 pfstate 448 2 0 0 1 0 1 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 522 0 110 30 2 28 30 0 8 0 art_table 40 525 0 110 5 0 5 5 0 8 0 art_node 32 123 0 40 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2523 0 1016 96 1 95 96 0 8 0 ffsino 296 2523 0 1016 117 0 117 117 0 8 0 nchpl 144 3341 0 1638 64 0 64 64 0 8 0 rtmask 32 3 0 3 2 1 1 1 0 8 1 vnodes 216 2805 0 0 156 0 156 156 0 8 0 namei 1024 10481 0 10480 3 2 1 2 0 8 0 percpumem 16 79 0 28 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 848 2 0 1 1 0 1 1 0 8 0 kstatmem 264 68 0 42 4 1 3 3 0 8 1 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 25125 0 25124 10 6 4 8 1 8 3 plimitpl 152 113 0 96 1 0 1 1 0 8 0 sigapl 424 918 0 865 7 0 7 7 0 8 0 knotepl 120 797 0 0 25 0 25 25 0 8 0 kqueuepl 224 201 0 190 4 3 1 3 0 8 0 pipepl 344 207 0 180 9 0 9 9 0 8 6 fdescpl 528 896 0 864 3 0 3 3 0 8 0 filepl 160 4936 0 4678 16 1 15 15 0 8 3 lockfpl 104 177 0 173 1 0 1 1 0 8 0 lockfspl 48 75 0 72 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 70 0 53 1 0 1 1 0 8 0 ucredpl 104 793 0 780 1 0 1 1 0 8 0 zombiepl 144 867 0 865 1 0 1 1 0 8 0 processpl 1232 918 0 865 5 0 5 5 0 8 0 procpl 664 1690 0 1629 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 1084 0 1053 13 6 7 11 0 8 3 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 1 14 15 0 8 0 mcl2k 2048 39 0 0 5 0 5 5 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 317 0 0 20 0 20 20 0 8 0 bufpl 280 10548 0 4412 439 0 439 439 0 8 0 anonpl 32 12609 0 0 102 0 102 102 0 246 0 amapchunkpl 152 23267 0 22748 38 5 33 33 0 158 12 amappl16 200 4381 0 4350 41 28 13 25 0 8 8 amappl15 192 17 0 16 1 0 1 1 0 8 0 amappl14 184 2 0 2 1 1 0 1 0 8 0 amappl13 176 443 0 441 1 0 1 1 0 8 0 amappl12 168 1256 0 1214 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 51 0 36 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 44 0 41 1 0 1 1 0 8 0 amappl7 128 82 0 81 1 0 1 1 0 8 0 amappl6 120 279 0 266 1 0 1 1 0 8 0 amappl5 112 76 0 66 1 0 1 1 0 8 0 amappl4 104 415 0 385 1 0 1 1 0 8 0 amappl3 96 4065 0 3968 4 1 3 3 0 8 0 amappl2 88 1002 0 926 2 0 2 2 0 8 0 amappl1 80 10904 0 10312 15 2 13 15 0 8 0 amappl 88 6412 0 6239 5 0 5 5 0 92 0 uvmvnodes 80 116 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 7 0 7 2 2 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 7 0 7 2 2 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 13 0 1 1 0 1 1 0 8 0 uaddrrnd 24 896 0 864 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 896 0 864 1 0 1 1 0 8 0 vmmpekpl 168 8926 0 8886 3 0 3 3 0 8 0 vmmpepl 168 64085 0 62113 113 8 105 105 0 357 18 vmsppl 488 895 0 864 5 1 4 5 0 8 0 rwobjpl 80 20669 0 19605 31 0 31 31 0 8 3 pdppl 4096 1803 0 1731 101 29 72 85 0 8 0 pvpl 32 18649 0 0 152 1 151 151 0 265 0 pmappl 256 897 0 865 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 290 0 40 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83860ff0) 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 __mp_lock(ffffffff8394d980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff8394d980) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff8394d980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff8394d980) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003c485290,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8394d980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff8394d980) at __mp_lock+0x192 sys/kern/kern_lock.c:173 vn_ioctl(fffffd806d26e0c8,80044b02,ffff80003c4854a0,ffff80003abe4d20) at vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 sys_ioctl(ffff80003abe4d20,ffff80003c485680,ffff80003c4855d0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c485680) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c485680) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 end trace frame: 0xffff80003c485700, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83860ff0) 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 __mp_lock(ffffffff8394d980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff8394d980) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff8394d980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff8394d980) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003c485290,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8394d980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff8394d980) at __mp_lock+0x192 sys/kern/kern_lock.c:173 vn_ioctl(fffffd806d26e0c8,80044b02,ffff80003c4854a0,ffff80003abe4d20) at vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 sys_ioctl(ffff80003abe4d20,ffff80003c485680,ffff80003c4855d0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c485680) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c485680) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd38d924dab0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71ad79e9b4e0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71ad79e9b4e0, count: -1