*cpu0: uvm_fault(0xfffffd800b027000, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7c4b0733c0c0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3e3320 rbx 0 rdx 0 rcx 0xffff80003c4a39d8 rax 0x3b r8 0xffff80002a3e3250 r9 0 r10 0xd3f6912c8d2ec471 r11 0xad58afbb685ed623 r12 0 r13 0 r14 0xffff80003c4a39d8 r15 0 rip 0xffffffff813873ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3e32a0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=365276 pid=6164 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4a2558,0xffff80003c4a34c8 process=0xffff8000384249e0 user=0xffff80002a3de000, vmspace=0xfffffd805e1b7028 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8906 273432 62398 0 2 0 syz-executor 8906 231871 62398 0 2 0x4000000 syz-executor * 6164 365276 36338 0 7 0 syz-executor 6164 74951 36338 0 3 0x4000080 fsleep syz-executor 5203 510108 83474 0 2 0xc80 syz-executor 5203 225070 83474 0 3 0x4000080 netcon syz-executor 5203 272762 83474 0 3 0x4000080 fsleep syz-executor 24848 352649 61019 0 3 0x80 nanoslp syz-executor 24848 342119 61019 0 3 0x4000080 sbwait syz-executor 32387 115960 0 0 3 0x14200 acct acct 60406 435824 2822 0 2 0xc82 syz-executor 83095 19303 1 0 3 0x100083 ttyin getty 62398 418466 2822 0 2 0xc82 syz-executor 6664 10170 2822 0 3 0x82 nanoslp syz-executor 5992 251667 85693 0 3 0x82 sbwait sshd-session 61019 470363 2822 0 2 0xc82 syz-executor 91082 451622 2822 0 3 0x82 wait syz-executor 83474 341072 2822 0 3 0x82 nanoslp syz-executor 39274 477059 0 0 3 0x14200 bored sosplice 36338 487819 2822 0 3 0x82 nanoslp syz-executor 81626 280659 2822 0 3 0x82 wait syz-executor 2822 154549 88682 0 3 0x82 kqread syz-executor 88682 201857 50875 0 3 0x10008a sigsusp ksh 50875 464321 90215 0 3 0x98 kqread sshd-session 90215 151836 85693 0 3 0x92 kqread sshd-session 85693 385554 1 0 3 0x88 kqread sshd 1341 67976 62677 74 3 0x1100092 bpf pflogd 62677 117227 1 0 3 0x80 sbwait pflogd 35170 333332 78688 73 3 0x1100090 kqread syslogd 78688 347 1 0 3 0x100082 sbwait syslogd 24136 298315 1 0 3 0x100080 kqread resolvd 60567 250329 72832 77 3 0x100092 kqread dhcpleased 11092 269586 72832 77 3 0x100092 kqread dhcpleased 72832 138993 1 0 3 0x80 kqread dhcpleased 90416 344145 0 0 3 0x14200 bored smr 69088 283343 0 0 3 0x14200 pgzero zerothread 90877 143383 0 0 3 0x14200 aiodoned aiodoned 6784 422560 0 0 3 0x14200 syncer update 64151 294903 0 0 3 0x14200 cleaner cleaner 70922 79431 0 0 2 0x14200 reaper 36655 270870 0 0 3 0x14200 pgdaemon pagedaemon 68654 383490 0 0 3 0x14200 bored viomb 82531 89180 0 0 3 0x40014200 acpi0 acpi0 13111 453675 0 0 3 0x40014200 idle1 36313 255169 0 0 3 0x14200 bored softnet7 46229 311165 0 0 3 0x14200 bored softnet6 81424 8486 0 0 3 0x14200 bored softnet5 4006 124688 0 0 3 0x14200 bored softnet4 64707 99895 0 0 3 0x14200 bored softnet3 56307 224428 0 0 3 0x14200 bored softnet2 38368 175948 0 0 3 0x14200 bored softnet1 44 123051 0 0 3 0x14200 bored softnet0 97813 85614 0 0 3 0x14200 smrbar systqmp 90813 387085 0 0 3 0x14200 bored systq 92321 489005 0 0 3 0x14200 tmoslp softclockmp 59519 168470 0 0 2 0x40014200 softclock 89170 28854 0 0 3 0x40014200 idle0 1 6141 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &map->flags_lock r = 0 (0xfffffd805e1b71a0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 vm_map_lock_ln+0x13f sys/uvm/uvm_map.c:5169 #4 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #5 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 8906 (syz-executor) thread 0xffff80003c4a2038 (231871) exclusive rrwlock inode r = 0 (0xfffffd806e0a2348) #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+0xa3 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_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 #9 VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 #10 domknodat+0x469 sys/kern/vfs_syscalls.c:1636 #11 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e0e2cb8) #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+0xa3 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 domknodat+0xb4 sys/kern/vfs_syscalls.c:1588 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 6164 (syz-executor) thread 0xffff80003c4a39d8 (365276) exclusive rwlock vmmaplk r = 0 (0xfffffd805e1b7128) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 exclusive mutex &map->flags_lock r = 0 (0xfffffd805e1b71a0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 vm_map_lock_ln+0x13f sys/uvm/uvm_map.c:5169 #4 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #5 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 97813 (systqmp) thread 0xffff8000ffffe290 (85614) shared rwlock systqmp r = 0 (0xffffffff837ed848) #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 10265 11172K 12394K 166960K 15864 0 pcb 19 16K 18K 166960K 1049 0 rtable 244 14K 14K 166960K 773 0 pf 41 18K 82K 166960K 509 0 ifaddr 47 10K 10K 166960K 257 0 ifgroup 63 2K 3K 166960K 488 0 sysctl 4 1K 9K 166960K 32 0 counters 72 37K 38K 166960K 508 0 ioctlops 0 0K 4K 166960K 2580 0 iov 0 0K 28K 166960K 519 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1517 95K 96K 166960K 5163 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 13K 166960K 59 0 VM map 2 1K 1K 166960K 2 0 sem 23 56K 56K 166960K 198 0 dirhash 12 2K 2K 166960K 75 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 4055 0 sigio 0 0K 0K 166960K 111 0 proc 72 115K 180K 166960K 1188 0 subproc 72 4K 4K 166960K 130 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 683 0 in_multi 87 6K 7K 166960K 307 0 ether_multi 1 0K 0K 166960K 28 0 mrt 2 0K 0K 166960K 21 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 271 1208K 1208K 166960K 271 0 exec 0 0K 1K 166960K 1348 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 2K 166960K 9 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 276 188K 206K 166960K 38343 0 UVM aobj 131 4K 4K 166960K 137 0 pinsyscall 45 90K 108K 166960K 5375 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 316 0 NDP 14 0K 2K 166960K 191 0 temp 79 8648K 8904K 166960K 235057 0 kqueue 13 20K 33K 166960K 770 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 120 428 0 424 5 4 1 3 0 8 0 rtentry 176 255 0 166 5 0 5 5 0 8 0 unpcb 144 3102 0 3081 32 30 2 6 0 8 1 syncache 336 20 0 20 7 7 0 1 0 8 0 tcpqe 32 4 0 4 3 3 0 1 0 8 0 tcpcb 736 1507 0 1497 33 31 2 7 0 8 0 arp 128 34 0 19 1 0 1 1 0 8 0 inpcb 328 4776 0 4759 56 49 7 12 0 8 5 nd6 144 43 0 27 1 0 1 1 0 8 0 pkpcb 40 37 0 37 10 9 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 3 0 1 0 8 0 ppxss 1192 171 0 171 6 5 1 1 0 8 1 pppxif 1504 19 0 19 8 8 0 1 0 8 0 pfstscr 40 8 0 8 3 3 0 1 0 8 0 pffrag 232 52 0 46 1 0 1 1 0 482 0 pffrnode 88 48 0 42 1 0 1 1 0 8 0 pffrent 40 91 0 85 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 5 0 5 4 4 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pfstitem 24 215 0 150 1 0 1 1 0 8 0 pfstkey 128 221 0 156 3 0 3 3 0 8 0 pfstate 384 221 0 156 8 1 7 7 0 8 0 pfrule 1344 27 0 22 2 1 1 2 0 8 0 rttmr 136 3 0 3 3 3 0 1 0 8 0 art_heap8 4096 4 0 1 4 1 3 3 0 8 0 art_heap4 256 1274 0 864 45 18 27 30 0 8 0 art_table 40 1278 0 865 5 0 5 5 0 8 0 art_node 32 253 0 182 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 11 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 192 0 171 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 59 0 42 3 0 3 3 0 8 0 dino2pl 256 9387 0 7880 96 1 95 96 0 8 0 ffsino 296 9387 0 7880 118 1 117 118 0 8 0 nchpl 144 15131 0 14494 64 39 25 64 0 8 0 rtmask 32 33 0 33 9 8 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 56234 0 56233 11 9 2 3 0 8 1 percpumem 16 269 0 218 1 0 1 1 0 8 0 kstatmem 264 328 0 296 4 1 3 3 0 8 0 scsiplug 72 20 0 20 9 8 1 1 0 8 1 scxspl 216 123219 0 123219 15 13 2 8 1 8 2 plimitpl 152 1380 0 1362 1 0 1 1 0 8 0 sigapl 424 4398 0 4341 11 3 8 9 0 8 0 knotepl 120 786 0 0 21 0 21 21 0 8 0 kqueuepl 224 1944 0 1934 23 20 3 5 0 8 2 pipepl 344 737 0 710 15 9 6 9 0 8 3 fdescpl 528 4304 0 4271 3 0 3 3 0 8 0 filepl 160 33951 0 33718 47 32 15 19 0 8 3 lockfpl 104 2303 0 2301 4 3 1 2 0 8 0 lockfspl 48 694 0 692 1 0 1 1 0 8 0 sessionpl 144 49 0 39 1 0 1 1 0 8 0 pgrppl 48 134 0 116 1 0 1 1 0 8 0 ucredpl 104 5878 0 5864 1 0 1 1 0 8 0 zombiepl 144 5406 0 5402 3 2 1 2 0 8 0 processpl 1248 4398 0 4341 8 3 5 7 0 8 0 procpl 656 10960 0 10897 12 4 8 9 0 8 0 sosppl 168 23 0 23 10 9 1 1 0 8 1 sockpl 752 8636 0 8594 95 84 11 20 0 8 6 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 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 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 66 0 0 6 0 6 6 0 8 0 mtagpl 96 17 0 0 1 0 1 1 0 8 0 mbufpl 256 1324 0 0 74 0 74 74 0 8 0 bufpl 280 52386 0 46243 442 2 440 440 0 8 0 anonpl 32 19615 0 0 158 0 158 158 0 246 0 amapchunkpl 152 135350 0 134701 94 62 32 38 0 158 4 amappl16 200 17333 0 17060 163 127 36 41 0 8 14 amappl15 192 4 0 4 2 2 0 1 0 8 0 amappl14 184 163 0 150 1 0 1 1 0 8 0 amappl13 176 6 0 6 2 1 1 1 0 8 1 amappl12 168 5078 0 5045 4 2 2 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 10 0 10 2 2 0 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 142 0 128 1 0 1 1 0 8 0 amappl6 120 262 0 257 1 0 1 1 0 8 0 amappl5 112 169 0 159 1 0 1 1 0 8 0 amappl4 104 395 0 373 1 0 1 1 0 8 0 amappl3 96 27730 0 27605 5 1 4 4 0 8 0 amappl2 88 942 0 869 2 0 2 2 0 8 0 amappl1 80 27796 0 27101 17 2 15 16 0 8 0 amappl 88 36761 0 36569 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 10 0 10 3 3 0 1 0 8 0 dma128 128 260 0 260 6 6 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 22 0 21 1 0 1 1 0 8 0 aobjpl 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 4304 0 4271 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4304 0 4271 1 0 1 1 0 8 0 vmmpekpl 168 34874 0 34814 5 1 4 4 0 8 0 vmmpepl 168 278739 0 276272 189 62 127 130 0 357 7 vmsppl 488 4303 0 4271 7 2 5 5 0 8 0 rwobjpl 80 78837 0 71468 168 8 160 161 0 8 3 pdppl 4096 8616 0 8542 153 79 74 88 0 8 0 pvpl 32 29083 0 0 233 0 233 233 0 265 0 pmappl 256 4303 0 4271 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 463 0 154 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837dcff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,61) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(61) at cnputc+0x67 sys/dev/cons.c:218 kputchar(61,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 printf(ffffffff8341a2c9) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003c43f400,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:626 kerntrap(ffff80003c43f400) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:487 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000016bf000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 end trace frame: 0xffff80003c43f530, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837dcff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,61) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(61) at cnputc+0x67 sys/dev/cons.c:218 kputchar(61,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 printf(ffffffff8341a2c9) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003c43f400,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:626 kerntrap(ffff80003c43f400) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:487 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000016bf000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,41,2000,ffff80003c4a2d08) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,41,2000,ffff80003c4a2d08) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c43f5b0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806930ebf0,41,fffffd80097fb410,ffff80003c4a2d08) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c0fc8e8,ffff80003c4a2d08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c0fc8e8,ffff80003c4a2d08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c0fc8e8,ffff80003c4a2d08) at fdrop+0x121 sys/kern/kern_descrip.c:1267 closef(fffffd806c0fc8e8,ffff80003c4a2d08) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4a2d08) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4a2d08,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4a2d08,ffff80003c43f920,ffff80003c43f870) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c43f920) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43f920) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c9aec241d10, count: -25 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7c4b0733c0c0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7c4b0733c0c0, count: -1