uvm_fault(0xfffffd806b987018, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 495972 65111 0 0x1000 0x4080000 0 syz-executor dt_ioctl_record_stop(ffff80000148b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c458028) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c458028) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c46b3f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8060c4c010,81,fffffd80097fb750,ffff80003c458028) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060b9f370,ffff80003c458028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060b9f370,ffff80003c458028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060b9f370,ffff80003c458028) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8060b9f370,ffff80003c458028) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c458028) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c458028,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c458028,ffff80003c46b760,ffff80003c46b6b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c46b760) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c46b760) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77facf32adf0, count: 3 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}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806b987018, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff80000148b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c458028) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c458028) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c46b3f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8060c4c010,81,fffffd80097fb750,ffff80003c458028) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060b9f370,ffff80003c458028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060b9f370,ffff80003c458028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060b9f370,ffff80003c458028) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8060b9f370,ffff80003c458028) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c458028) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c458028,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c458028,ffff80003c46b760,ffff80003c46b6b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c46b760) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c46b760) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77facf32adf0, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c46b320 rbx 0x1 rdx 0 rcx 0xffff80003c458028 rax 0xffffffff837d4f80 dt_prov_static r8 0x7f7fffffc000 r9 0x1 r10 0x505b267010008123 r11 0xc98046ad82a38a2 r12 0 r13 0 r14 0 r15 0xffff80000157ea00 rip 0xffffffff81c007b8 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c46b2f0 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=394369 pid=23937 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c458028 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c4582c0,0xffff80003c458800 process=0xffff80003581e6a0 user=0xffff80003c466000, vmspace=0xfffffd806b987018 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37640 43047 79525 0 2 0 syz-executor 37640 320424 79525 0 2 0x4000000 syz-executor 71305 438902 88613 0 2 0 syz-executor 71305 194939 88613 0 2 0x4000000 syz-executor 49577 351252 54735 0 3 0x80 nanoslp syz-executor 49577 131701 54735 0 3 0x4000080 fsleep syz-executor 49577 163077 54735 0 3 0x4000080 fsleep syz-executor 4381 139197 65743 0 3 0x80 nanoslp syz-executor 4381 165233 65743 0 3 0x4000080 sbwait syz-executor 4381 263701 65743 0 3 0x4000080 fsleep syz-executor 4381 158711 65743 0 3 0x4000080 fsleep syz-executor 11930 49843 85332 0 2 0 syz-executor 11930 283011 85332 0 3 0x4000080 fifor syz-executor 65111 165753 36345 0 3 0x3000 suspend syz-executor 65111 495972 36345 0 7 0x4081000 syz-executor 65111 126449 36345 0 3 0x4081000 inode syz-executor 10547 4618 0 0 3 0x14280 nfsidl nfsio 79525 119341 18673 0 3 0x82 nanoslp syz-executor 88613 448038 18673 0 3 0x82 nanoslp syz-executor 85332 48763 18673 0 3 0x82 nanoslp syz-executor 31859 85854 18673 0 3 0x82 nanoslp syz-executor 73917 302005 18673 0 3 0x82 wait syz-executor 36345 354889 18673 0 3 0x82 wait syz-executor 54735 423093 18673 0 3 0x82 nanoslp syz-executor 65743 266105 18673 0 3 0x82 nanoslp syz-executor 18673 481400 49160 0 3 0x82 kqread syz-executor 49160 496697 1706 0 3 0x10008a sigsusp ksh 1706 475474 60663 0 3 0x98 kqread sshd-session 60663 2407 83146 0 3 0x92 kqread sshd-session 37426 505964 1 0 3 0x100083 ttyin getty 83146 372644 1 0 3 0x88 kqread sshd 57060 324051 55417 74 3 0x1100092 bpf pflogd 55417 467902 1 0 3 0x80 sbwait pflogd 86629 26872 4631 73 3 0x1100090 kqread syslogd 4631 85820 1 0 3 0x100082 sbwait syslogd 87572 102225 1 0 3 0x100080 kqread resolvd 50949 422003 61521 77 3 0x100092 kqread dhcpleased 15969 471227 61521 77 3 0x100092 kqread dhcpleased 61521 335773 1 0 3 0x80 kqread dhcpleased 50071 318227 0 0 3 0x14200 pause smr 22400 138604 0 0 3 0x14200 pgzero zerothread 19193 269121 0 0 3 0x14200 aiodoned aiodoned 28458 22217 0 0 3 0x14200 syncer update 63288 334267 0 0 3 0x14200 cleaner cleaner 43410 248307 0 0 3 0x14200 reaper reaper 74186 476117 0 0 3 0x14200 pgdaemon pagedaemon 53397 256370 0 0 3 0x14200 bored viomb 50905 391066 0 0 3 0x40014200 acpi0 acpi0 63519 34251 0 0 3 0x40014200 idle1 56755 362843 0 0 3 0x14200 bored softnet7 8806 489660 0 0 3 0x14200 bored softnet6 14342 409720 0 0 3 0x14200 bored softnet5 23085 372445 0 0 3 0x14200 bored softnet4 91973 450941 0 0 3 0x14200 bored softnet3 73070 502407 0 0 3 0x14200 bored softnet2 58795 364635 0 0 3 0x14200 bored softnet1 20433 154144 0 0 3 0x14200 bored softnet0 19346 58636 0 0 3 0x14200 smrbar systqmp 43472 485776 0 0 3 0x14200 bored systq 28056 373353 0 0 3 0x14200 tmoslp softclockmp 57729 431862 0 0 3 0x40014200 tmoslp softclock 86269 428213 0 0 3 0x40014200 idle0 1 285575 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 11930 (syz-executor) thread 0xffff800031008d18 (49843) shared rwlock vmmaplk r = 0 (0xfffffd806b987c88) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1924 #3 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 Process 65111 (syz-executor) thread 0xffff800031008a80 (495972) exclusive rrwlock inode r = 0 (0xfffffd80783cbeb8) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 19346 (systqmp) thread 0xffff8000ffffea60 (58636) shared rwlock systqmp r = 0 (0xffffffff837b9f38) #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 10238 11117K 11214K 166960K 11425 0 pcb 20 12K 12K 166960K 43 0 rtable 177 5K 8K 166960K 283 0 pf 34 17K 20K 166960K 67 0 ifaddr 41 7K 7K 166960K 49 0 ifgroup 55 2K 2K 166960K 67 0 sysctl 3 1K 9K 166960K 8 0 counters 68 36K 37K 166960K 76 0 ioctlops 0 0K 4K 166960K 1503 0 iov 0 0K 16K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1343 84K 85K 166960K 1448 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 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 271 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 164K 166960K 542 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 2 0K 0K 166960K 18 0 in_multi 95 7K 7K 166960K 102 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 390 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 269 169K 182K 166960K 4178 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 43 86K 103K 166960K 1371 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 7 0 NDP 12 0K 2K 166960K 31 0 temp 37 8642K 8706K 166960K 11024 0 kqueue 14 22K 28K 166960K 45 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 120 108 0 105 3 0 3 3 0 8 2 rtentry 176 98 0 19 5 0 5 5 0 8 0 unpcb 144 94 0 73 1 0 1 1 0 8 0 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 736 57 0 53 4 0 4 4 0 8 3 arp 128 11 0 2 1 0 1 1 0 8 0 inpcb 328 188 0 177 4 0 4 4 0 8 3 nd6 144 16 0 0 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 2 0 2 1 0 1 1 0 8 1 pppxif 1504 1 0 1 1 0 1 1 0 8 1 pffrag 232 5 0 1 2 1 1 1 0 482 0 pffrnode 88 4 0 1 2 1 1 1 0 8 0 pffrent 40 6 0 2 2 1 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 7 0 7 2 1 1 1 0 8 1 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pfstitem 24 26 0 0 1 0 1 1 0 8 0 pfstkey 128 26 0 0 1 0 1 1 0 8 0 pfstate 384 26 0 0 3 0 3 3 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 444 0 53 28 0 28 28 0 8 1 art_table 40 445 0 53 5 0 5 5 0 8 0 art_node 32 98 0 28 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1787 0 275 96 0 96 96 0 8 0 ffsino 296 1787 0 275 117 0 117 117 0 8 0 nchpl 144 2155 0 461 63 0 63 63 0 8 0 uvmvnodes 80 1920 0 0 40 0 40 40 0 8 0 vnodes 216 1920 0 0 107 0 107 107 0 8 0 namei 1024 6768 0 6767 3 2 1 2 0 8 0 percpumem 16 53 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 kstatmem 264 32 0 6 3 0 3 3 0 8 1 scxspl 216 9012 0 9012 3 2 1 2 1 8 1 plimitpl 152 85 0 65 1 0 1 1 0 8 0 sigapl 424 574 0 519 7 0 7 7 0 8 0 knotepl 120 486 0 0 15 0 15 15 0 8 0 kqueuepl 224 122 0 112 5 0 5 5 0 8 4 pipepl 344 151 0 124 6 0 6 6 0 8 3 fdescpl 528 548 0 516 3 0 3 3 0 8 0 filepl 160 2478 0 2251 14 1 13 13 0 8 2 lockfpl 104 48 0 46 1 0 1 1 0 8 0 lockfspl 48 24 0 22 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 306 0 293 1 0 1 1 0 8 0 zombiepl 144 579 0 576 1 0 1 1 0 8 0 processpl 1232 574 0 519 5 0 5 5 0 8 0 procpl 664 807 0 742 6 0 6 6 0 8 0 sockpl 752 401 0 366 14 3 11 11 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1986 0 0 125 0 125 125 0 8 0 bufpl 280 3907 0 122 271 0 271 271 0 8 0 anonpl 32 8928 0 0 72 0 72 72 0 246 0 amapchunkpl 152 12870 0 12158 38 7 31 31 0 158 3 amappl16 200 2478 0 2251 15 3 12 12 0 8 0 amappl15 192 30 0 30 1 1 0 1 0 8 0 amappl14 184 119 0 107 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1269 0 1237 4 2 2 3 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 285 0 285 1 1 0 1 0 8 0 amappl8 136 26 0 22 1 0 1 1 0 8 0 amappl7 128 108 0 96 1 0 1 1 0 8 0 amappl6 120 182 0 179 1 0 1 1 0 8 0 amappl5 112 125 0 116 1 0 1 1 0 8 0 amappl4 104 311 0 291 1 0 1 1 0 8 0 amappl3 96 2107 0 1976 5 1 4 4 0 8 0 amappl2 88 659 0 597 2 0 2 2 0 8 0 amappl1 80 9094 0 8482 16 2 14 15 0 8 0 amappl 88 3454 0 3261 5 0 5 5 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 549 0 517 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 549 0 517 1 0 1 1 0 8 0 vmmpekpl 168 6329 0 6292 3 0 3 3 0 8 1 vmmpepl 168 42032 0 39767 99 0 99 99 0 357 0 vmsppl 488 548 0 517 6 1 5 5 0 8 1 rwobjpl 80 16603 0 13504 64 0 64 64 0 8 0 pdppl 4096 1106 0 1034 104 32 72 86 0 8 0 pvpl 32 15678 0 0 127 0 127 127 0 265 0 pmappl 256 548 0 517 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 393 0 37 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837e3ff0) 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(ffffffff838d9b80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d9b80) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838d9b80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d9b80) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff838d9b80,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 biowait(fffffd800e7f6380) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd800e7f6380) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ffs2_balloc(fffffd80783cbe18,c64000,4000,fffffd80097fb750,2,ffff80003c482f08) at ffs2_balloc+0x18b4 sys/ufs/ffs/ffs_balloc.c:701 ffs_write(ffff80003c482f90) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 end trace frame: 0xffff80003c483000, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837e3ff0) 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(ffffffff838d9b80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d9b80) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838d9b80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d9b80) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff838d9b80,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 biowait(fffffd800e7f6380) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd800e7f6380) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ffs2_balloc(fffffd80783cbe18,c64000,4000,fffffd80097fb750,2,ffff80003c482f08) at ffs2_balloc+0x18b4 sys/ufs/ffs/ffs_balloc.c:701 ffs_write(ffff80003c482f90) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806700b7c0,ffff80003c483148,7,fffffd80097fb750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd8060b9feb0,ffff80003c483148,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:408 dofilewritev(ffff800031008a80,3,ffff80003c483148,0,ffff80003c483200) at dofilewritev+0x242 sys/kern/sys_generic.c:380 sys_write(ffff800031008a80,ffff80003c4832b0,ffff80003c483200) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80003c4832b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4832b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x21c835cce50, count: -20 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff80000148b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c458028) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c458028) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c46b3f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8060c4c010,81,fffffd80097fb750,ffff80003c458028) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060b9f370,ffff80003c458028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060b9f370,ffff80003c458028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060b9f370,ffff80003c458028) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8060b9f370,ffff80003c458028) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c458028) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c458028,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c458028,ffff80003c46b760,ffff80003c46b6b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c46b760) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c46b760) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77facf32adf0, count: 3 ddb{1}> trace dt_ioctl_record_stop(ffff80000148b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c458028) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c458028) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c46b3f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8060c4c010,81,fffffd80097fb750,ffff80003c458028) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060b9f370,ffff80003c458028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060b9f370,ffff80003c458028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060b9f370,ffff80003c458028) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8060b9f370,ffff80003c458028) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c458028) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c458028,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c458028,ffff80003c46b760,ffff80003c46b6b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c46b760) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c46b760) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77facf32adf0, count: -12