uvm_fault(0xfffffd8068909020, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 TID PID UID PRFLAGS PFLAGS CPU COMMAND 81382 29726 0 0x14000 0x200 0 softnet0 dt_ioctl_record_stop(ffff80000158e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c45a7f0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c45a7f0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c430590) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c710db8,81,fffffd80097fb478,ffff80003c45a7f0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805b2e96b0,ffff80003c45a7f0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805b2e96b0,ffff80003c45a7f0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805b2e96b0,ffff80003c45a7f0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805b2e96b0,ffff80003c45a7f0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c45a7f0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c45a7f0,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c45a7f0,ffff80003c430900,ffff80003c430850) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c430900) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c430900) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x720ca4df0f60, 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(0xfffffd8068909020, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff80000158e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c45a7f0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c45a7f0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c430590) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c710db8,81,fffffd80097fb478,ffff80003c45a7f0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805b2e96b0,ffff80003c45a7f0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805b2e96b0,ffff80003c45a7f0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805b2e96b0,ffff80003c45a7f0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805b2e96b0,ffff80003c45a7f0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c45a7f0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c45a7f0,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c45a7f0,ffff80003c430900,ffff80003c430850) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c430900) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c430900) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x720ca4df0f60, count: -12 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4304c0 rbx 0xffffffff81d2b1b0 dtclose rdx 0 rcx 0xffff80003c45a7f0 rax 0xffff8000299ddff0 r8 0x10 r9 0xd6 r10 0 r11 0x61c006d915ef0304 r12 0 r13 0 r14 0 r15 0xffff8000014b3f00 rip 0xffffffff81d2b590 dt_ioctl_record_stop+0xf0 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c430490 ss 0 dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 ddb{1}> show proc PROC (syz-executor) tid=209805 pid=69204 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c45a7f0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c45b9e0,0xffff8000ffff1c68 process=0xffff8000fffec4d0 user=0xffff80003c42b000, vmspace=0xfffffd8068909020 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72643 130174 85651 0 2 0 syz-executor 72643 408423 85651 0 2 0x4000000 syz-executor 21776 253806 44982 0 2 0 syz-executor 21776 333582 44982 0 3 0x4000080 fsleep syz-executor 13657 403328 33771 60929 3 0x90 nanoslp syz-executor 13657 454073 33771 60929 3 0x4000090 netcon syz-executor 13657 71715 33771 60929 3 0x4000090 fsleep syz-executor 20004 260301 39226 0 3 0x80 nanoslp syz-executor 20004 70946 39226 0 3 0x4000080 fsleep syz-executor 20004 188013 39226 0 3 0x4000080 fsleep syz-executor 20004 319366 39226 0 3 0x4000080 sbwait syz-executor 26086 65079 51773 0 2 0 syz-executor 26086 305354 51773 0 3 0x4000080 kqread syz-executor 26086 426094 51773 0 3 0x4000080 fsleep syz-executor 68022 267385 46697 0 3 0x82 nanoslp syz-executor 41136 505115 0 0 3 0x14200 acct acct 59435 63276 1 0 3 0x100083 ttyin getty 44982 127529 46697 0 3 0x82 nanoslp syz-executor 12939 486973 0 0 3 0x14200 bored sosplice 39226 321681 46697 0 3 0x82 nanoslp syz-executor 85651 69732 46697 0 3 0x82 nanoslp syz-executor 95199 426659 46697 0 2 0x2 syz-executor 51773 18457 46697 0 2 0x2 syz-executor 5964 201538 46697 0 3 0x2 biowait syz-executor 33771 262053 46697 0 3 0x82 nanoslp syz-executor 46697 68941 12598 0 2 0x2 syz-executor 12598 242761 88445 0 3 0x10008a sigsusp ksh 88445 392781 82126 0 3 0x98 kqread sshd-session 82126 400568 87562 0 3 0x92 kqread sshd-session 87562 17104 1 0 3 0x88 kqread sshd 2324 35826 11849 74 3 0x1100092 bpf pflogd 11849 358512 1 0 3 0x80 sbwait pflogd 34218 84872 7628 73 3 0x1100090 kqread syslogd 7628 306612 1 0 3 0x100082 sbwait syslogd 78121 17399 1 0 3 0x100080 kqread resolvd 34803 114909 62240 77 3 0x100092 kqread dhcpleased 95469 254657 62240 77 3 0x100092 kqread dhcpleased 62240 422107 1 0 3 0x80 kqread dhcpleased 42766 382891 0 0 3 0x14200 bored smr 57827 25800 0 0 2 0x14200 zerothread 44925 48729 0 0 3 0x14200 aiodoned aiodoned 50943 442717 0 0 3 0x14200 syncer update 31398 458026 0 0 3 0x14200 cleaner cleaner 27787 27927 0 0 2 0x14200 reaper 94310 69819 0 0 3 0x14200 pgdaemon pagedaemon 11205 262337 0 0 3 0x14200 bored viomb 44296 192495 0 0 3 0x40014200 acpi0 acpi0 81288 490531 0 0 3 0x40014200 idle1 52449 438375 0 0 3 0x14200 bored softnet3 34653 40303 0 0 3 0x14200 bored softnet2 8297 285169 0 0 3 0x14200 bored softnet1 29726 81382 0 0 7 0x14200 softnet0 9704 19292 0 0 3 0x14200 bored systqmp 48660 226110 0 0 3 0x14200 bored systq 77856 208794 0 0 3 0x14200 tmoslp softclockmp 54442 378918 0 0 3 0x40014200 tmoslp softclock 73306 459338 0 0 3 0x40014200 idle0 1 390262 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 72643 (syz-executor) thread 0xffff8000ffff0cf8 (408423) exclusive rwlock vmmaplk r = 0 (0xfffffd8068909e40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1918 #4 uvm_fault_check+0x8a5 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x8a5 sys/uvm/uvm_fault.c:784 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 5964 (syz-executor) thread 0xffff8000ffffd9a8 (201538) exclusive rrwlock inode r = 0 (0xfffffd80605ce9a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 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:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d019790) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10221 11095K 11702K 166960K 12366 0 pcb 19 14K 14K 166960K 189 0 rtable 224 10K 10K 166960K 495 0 pf 37 18K 81K 166960K 105 0 ifaddr 39 6K 8K 166960K 78 0 ifgroup 58 2K 2K 166960K 117 0 sysctl 4 1K 9K 166960K 14 0 counters 68 36K 37K 166960K 130 0 ioctlops 0 0K 4K 166960K 1690 0 iov 0 0K 24K 166960K 56 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1455 92K 92K 166960K 2343 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 66 0 dirhash 15 2K 3K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 102K 166960K 1121 0 sigio 0 0K 0K 166960K 25 0 proc 72 91K 128K 166960K 691 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 246 0 in_multi 84 6K 7K 166960K 155 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 569 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 8 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 238 160K 173K 166960K 11970 0 UVM aobj 29 4K 4K 166960K 29 0 pinsyscall 42 84K 104K 166960K 2317 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 185 0 NDP 14 0K 1K 166960K 53 0 temp 65 8685K 8939K 166960K 46157 0 kqueue 14 22K 30K 166960K 197 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 88 0 85 1 0 1 1 0 8 0 rtentry 176 145 0 49 7 1 6 6 0 8 0 unpcb 144 636 0 618 2 1 1 2 0 8 0 syncache 336 8 0 8 6 5 1 1 0 8 1 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 808 294 0 287 9 7 2 7 0 8 1 arp 128 24 0 8 1 0 1 1 0 8 0 inpcb 384 905 0 891 12 10 2 8 0 8 0 nd6 144 33 0 13 1 0 1 1 0 8 0 pkpcb 40 25 0 25 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 24 0 24 3 2 1 1 0 8 1 pppxif 1504 2 0 2 2 2 0 1 0 8 0 pffrag 232 12 0 5 1 0 1 1 0 482 0 pffrnode 88 7 0 2 1 0 1 1 0 8 0 pffrent 40 22 0 15 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 80 0 27 1 0 1 1 0 8 0 pfstkey 128 84 0 31 2 0 2 2 0 8 0 pfstate 384 81 0 29 6 0 6 6 0 8 0 pfrule 1344 25 0 17 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 565 0 169 30 5 25 29 0 8 0 art_table 32 566 0 169 4 0 4 4 0 8 0 art_node 16 142 0 54 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 63 0 53 1 0 1 1 0 8 0 shmpl 112 26 0 0 1 0 1 1 0 8 0 dirhash 1024 34 0 15 3 0 3 3 0 8 0 dino2pl 256 3527 0 2018 95 0 95 95 0 8 0 ffsino 288 3527 0 2018 109 0 109 109 0 8 0 nchpl 144 5048 0 3352 64 0 64 64 0 8 0 rtmask 32 5 0 5 2 2 0 1 0 8 0 uvmvnodes 80 4118 0 0 85 0 85 85 0 8 0 vnodes 216 4118 0 0 229 0 229 229 0 8 0 namei 1024 17565 0 17564 2 1 1 2 0 8 0 percpumem 16 80 0 31 1 0 1 1 0 8 0 kstatmem 264 70 0 42 4 1 3 3 0 8 1 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 19450 0 19449 12 11 1 8 1 8 0 plimitpl 152 230 0 212 1 0 1 1 0 8 0 sigapl 424 1451 0 1400 11 2 9 9 0 8 2 knotepl 120 783 0 0 24 0 24 24 0 8 0 kqueuepl 224 394 0 384 7 5 2 5 0 8 1 pipepl 336 201 0 174 3 0 3 3 0 8 0 fdescpl 520 1409 0 1378 3 0 3 3 0 8 0 filepl 160 8222 0 7999 16 5 11 14 0 8 0 lockfpl 104 319 0 316 1 0 1 1 0 8 0 lockfspl 48 140 0 137 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 48 0 31 1 0 1 1 0 8 0 ucredpl 104 1196 0 1181 1 0 1 1 0 8 0 zombiepl 144 1623 0 1622 1 0 1 1 0 8 0 processpl 1208 1451 0 1400 6 0 6 6 0 8 0 procpl 656 3159 0 3098 9 1 8 8 0 8 1 srpgc 96 4 0 4 2 2 0 1 0 8 0 sosppl 168 6 0 6 3 2 1 1 0 8 1 sockpl 728 1669 0 1634 13 9 4 11 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 236 0 0 15 0 15 15 0 8 0 bufpl 280 6511 0 369 439 0 439 439 0 8 0 anonpl 32 10952 0 0 89 0 89 89 0 246 0 amapchunkpl 152 39801 0 39313 38 10 28 30 0 158 3 amappl16 200 3299 0 3267 19 12 7 15 0 8 0 amappl15 192 10 0 10 3 2 1 1 0 8 1 amappl14 184 128 0 116 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 2105 0 2075 3 1 2 2 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 120 0 107 1 0 1 1 0 8 0 amappl6 120 205 0 201 1 0 1 1 0 8 0 amappl5 112 145 0 135 1 0 1 1 0 8 0 amappl4 104 367 0 347 1 0 1 1 0 8 0 amappl3 96 7851 0 7745 5 1 4 4 0 8 0 amappl2 88 728 0 663 2 0 2 2 0 8 0 amappl1 80 13806 0 13209 17 3 14 15 0 8 0 amappl 88 11009 0 10845 5 0 5 5 0 92 0 dma65536 65536 3 0 3 3 3 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 28 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1408 0 1378 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1408 0 1378 1 0 1 1 0 8 0 vmmpekpl 168 12913 0 12863 3 0 3 3 0 8 0 vmmpepl 168 93315 0 91365 106 12 94 104 0 357 0 vmsppl 480 1407 0 1378 5 0 5 5 0 8 0 rwobjpl 72 29598 0 24514 95 1 94 94 0 8 1 pdppl 4096 2824 0 2756 116 42 74 86 0 8 6 pvpl 32 18022 0 0 147 1 146 146 0 265 0 pmappl 256 1407 0 1378 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 421 0 66 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0