uvm_fault(0xfffffd806ee925c0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff831f9a38 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a3d0710 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff831f9a38 Starting stack trace... panic(ffffffff833c6b8d) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a3d0660) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000016a1000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80002a2f2fd8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80002a2f2fd8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a3d0810) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80633fb878,81,fffffd80097fb478,ffff80002a2f2fd8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806313c940,ffff80002a2f2fd8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806313c940,ffff80002a2f2fd8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806313c940,ffff80002a2f2fd8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806313c940,ffff80002a2f2fd8) at closef+0x192 sys/kern/kern_descrip.c:1264 syscall(ffff80002a3d0a70) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3d0a70) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x891e4821310, count: 245 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 519532 42690 0 0 0 0 syz-executor *495066 53929 0 0 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x742a4a46cbe0, 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(0xfffffd806ee925c0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x742a4a46cbe0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3bc230 rbx 0 rdx 0 rcx 0xffff80002a2f2d40 rax 0x2a r8 0xffff80002a3bc160 r9 0x1 r10 0xbf3770e6152ab7b8 r11 0xfedb31ce3faa8e39 r12 0 r13 0xffffffff8327f648 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff818fb4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3bc1b0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=495066 pid=53929 tcnt=4 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe9778,0xffff80002a2f2ab8 process=0xffff8000fffed828 user=0xffff80002a3b7000, vmspace=0xfffffd805fb78028 estcpu=36, cpticks=12, pctcpu=0.5, user=12, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88005 155755 78817 0 2 0 syz-executor 88005 89143 78817 0 3 0x4000080 fsleep syz-executor 42690 519532 1858 0 7 0 syz-executor 42690 98971 1858 0 3 0x4000000 biowait syz-executor 82261 348412 67880 0 3 0 vmmaplk syz-executor 82261 469291 67880 0 3 0x4000080 fsleep syz-executor 82261 57000 67880 0 3 0x4000080 fsleep syz-executor 82261 183298 67880 0 2 0x4000000 syz-executor *53929 495066 56841 0 7 0 syz-executor 53929 486049 56841 0 2 0x4000000 syz-executor 53929 232494 56841 0 3 0x4000080 fsleep syz-executor 53929 122861 56841 0 3 0x4000080 fsleep syz-executor 19696 232915 35213 0 2 0 syz-executor 19696 227633 35213 0 3 0x4000000 sbar syz-executor 19696 173139 35213 0 3 0x4000080 fsleep syz-executor 19696 24902 35213 0 3 0x4000080 fsleep syz-executor 44208 265121 5919 0 2 0x2 syz-executor 84690 296734 0 0 3 0x14200 acct acct 57441 147055 0 0 3 0x14280 nfsidl nfsio 45846 105289 0 0 3 0x14280 nfsidl nfsio 65268 120586 0 0 3 0x14280 nfsidl nfsio 59544 127767 5919 0 3 0x82 nanoslp syz-executor 78817 446518 5919 0 3 0x82 nanoslp syz-executor 53971 434549 5919 0 3 0x2 getblk syz-executor 67880 43747 5919 0 3 0x82 nanoslp syz-executor 56841 316429 5919 0 3 0x82 nanoslp syz-executor 1858 292366 5919 0 3 0x82 nanoslp syz-executor 35213 407015 5919 0 3 0x82 nanoslp syz-executor 5919 324570 91096 0 3 0x82 kqread syz-executor 91096 149809 41579 0 3 0x10008a sigsusp ksh 41579 451262 65995 0 3 0x98 kqread sshd-session 65995 193035 29400 0 3 0x92 kqread sshd-session 39518 242544 1 0 3 0x100083 ttyin getty 29400 252848 1 0 3 0x88 kqread sshd 51388 105163 35033 74 3 0x1100092 bpf pflogd 35033 273700 1 0 3 0x80 sbwait pflogd 52853 262931 52869 73 3 0x1100090 kqread syslogd 52869 32334 1 0 3 0x100082 sbwait syslogd 22921 174027 1 0 3 0x100080 kqread resolvd 68661 459330 88824 77 3 0x100092 kqread dhcpleased 74775 438993 88824 77 3 0x100092 kqread dhcpleased 88824 32548 1 0 3 0x80 kqread dhcpleased 17847 351160 0 0 3 0x14200 bored smr 1180 190086 0 0 2 0x14200 zerothread 60205 482632 0 0 3 0x14200 aiodoned aiodoned 47297 401795 0 0 3 0x14200 syncer update 80627 299029 0 0 3 0x14200 cleaner cleaner 92614 182113 0 0 3 0x14200 reaper reaper 47141 206042 0 0 3 0x14200 pgdaemon pagedaemon 33638 150765 0 0 3 0x14200 bored viomb 6029 220568 0 0 3 0x40014200 acpi0 acpi0 16135 89132 0 0 3 0x40014200 idle1 73177 214544 0 0 3 0x14200 bored softnet1 73553 467880 0 0 3 0x14200 netlock softnet0 80620 182598 0 0 2 0x40014200 systqmp 91621 59390 0 0 3 0x14200 bored systq 89079 324377 0 0 3 0x14200 tmoslp softclockmp 26544 156266 0 0 3 0x40014200 tmoslp softclock 93466 68305 0 0 3 0x40014200 idle0 1 7595 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 42690 (syz-executor) thread 0xffff80002a271ca0 (98971) Process 82261 (syz-executor) thread 0xffff80002a2f3508 (183298) Process 19696 (syz-executor) thread 0xffff80002a2f2fd8 (227633) Process 44208 (syz-executor) thread 0xffff80002a270018 (265121) Process 53971 (syz-executor) thread 0xffff80002a271240 (434549) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10247 11093K 12481K 166960K 14223 0 pcb 17 16K 18K 166960K 1007 0 rtable 223 14K 14K 166960K 972 0 pf 40 19K 81K 166960K 523 0 ifaddr 43 9K 9K 166960K 288 0 ifgroup 55 2K 3K 166960K 555 0 sysctl 4 1K 9K 166960K 126 0 counters 68 36K 38K 166960K 664 0 ioctlops 0 0K 8K 166960K 2185 0 iov 0 0K 28K 166960K 400 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1483 93K 94K 166960K 4265 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 230 0 dirhash 12 2K 3K 166960K 99 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 3438 0 sigio 0 0K 0K 166960K 69 0 proc 73 115K 164K 166960K 1060 0 subproc 72 4K 4K 166960K 127 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 948 0 in_multi 75 5K 7K 166960K 312 0 ether_multi 1 0K 0K 166960K 43 0 mrt 2 0K 0K 166960K 26 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 1027 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 7 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 259 160K 182K 166960K 34273 0 UVM aobj 131 7K 7K 166960K 136 0 pinsyscall 42 84K 103K 166960K 4709 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 218 0 NDP 14 0K 1K 166960K 202 0 temp 80 8660K 8907K 166960K 195843 0 kqueue 14 22K 34K 166960K 720 0 SYN cache 2 8K 16K 166960K 3 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 120 578 0 574 8 7 1 3 0 8 0 rtentry 176 281 0 203 6 0 6 6 0 8 0 unpcb 144 3067 0 3049 27 24 3 6 0 8 2 syncache 336 16 0 16 7 7 0 1 0 8 0 tcpqe 32 1 11 1 1 1 0 1 0 8 0 tcpcb 736 1111 0 1100 20 13 7 8 0 8 5 arp 136 44 0 27 1 0 1 1 0 8 0 inpcb 328 4082 0 4067 42 34 8 13 0 8 6 nd6 152 44 0 27 1 0 1 1 0 8 0 pkpcb 40 25 0 25 5 5 0 1 0 8 0 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 233 0 233 3 2 1 1 0 8 1 pppxif 1504 38 0 38 5 4 1 1 0 8 1 pfstscr 40 5 0 5 2 2 0 1 0 8 0 pffrag 232 29 0 18 1 0 1 1 0 482 0 pffrnode 88 23 0 13 1 0 1 1 0 8 0 pffrent 40 41 0 30 1 0 1 1 0 8 0 pfosfp 40 1430 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1430 0 714 21 0 21 21 0 8 0 pfrktable 1344 5 0 5 4 4 0 1 0 8 0 pfstitem 24 178 0 100 1 0 1 1 0 8 0 pfstkey 128 186 0 108 3 0 3 3 0 8 0 pfstate 384 183 0 105 8 0 8 8 0 8 0 pfrule 1344 27 0 21 2 1 1 2 0 8 0 rttmr 136 7 0 7 5 4 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1324 0 987 34 12 22 29 0 8 0 art_table 40 1328 0 987 5 0 5 5 0 8 0 art_node 32 273 0 208 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 14 2 1 1 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 223 0 213 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 75 0 58 3 0 3 3 0 8 0 dino2pl 256 8440 0 6917 96 0 96 96 0 8 0 ffsino 296 8440 0 6917 119 1 118 118 0 8 0 nchpl 144 13104 0 11384 65 0 65 65 0 8 0 rtmask 32 34 0 34 8 7 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 46489 0 46487 5 4 1 3 0 8 0 percpumem 16 347 0 298 1 0 1 1 0 8 0 kstatmem 264 352 0 324 8 5 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 10 0 10 6 6 0 1 0 8 0 scxspl 216 63382 0 63381 16 15 1 4 1 8 0 plimitpl 152 857 0 839 1 0 1 1 0 8 0 sigapl 424 3753 0 3702 10 2 8 8 0 8 0 knotepl 120 653 0 0 18 0 18 18 0 8 0 kqueuepl 224 1598 0 1588 19 17 2 5 0 8 1 pipepl 344 597 0 570 6 3 3 6 0 8 0 fdescpl 528 3686 0 3655 3 0 3 3 0 8 0 filepl 160 28264 0 28039 45 30 15 23 0 8 4 lockfpl 104 1640 0 1638 2 1 1 2 0 8 0 lockfspl 48 618 0 616 1 0 1 1 0 8 0 sessionpl 144 35 0 26 1 0 1 1 0 8 0 pgrppl 48 95 0 78 1 0 1 1 0 8 0 ucredpl 104 5839 0 5825 1 0 1 1 0 8 0 zombiepl 144 4837 0 4836 2 1 1 1 0 8 0 processpl 1232 3753 0 3702 8 2 6 6 0 8 0 procpl 664 9645 0 9583 10 4 6 8 0 8 0 sosppl 176 20 0 20 7 6 1 1 0 8 1 sockpl 752 7873 0 7836 64 52 12 18 0 8 7 mcl64k 65536 31 0 0 4 0 4 4 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 15 0 15 15 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 41 0 0 5 0 5 5 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1535 0 0 89 0 89 89 0 8 0 bufpl 280 22616 0 16479 439 0 439 439 0 8 0 anonpl 32 14836 0 0 120 1 119 119 0 246 0 amapchunkpl 152 118502 0 117885 76 36 40 40 0 158 9 amappl16 200 10304 0 10218 80 66 14 33 0 8 4 amappl15 192 8 0 6 2 1 1 1 0 8 0 amappl14 184 56 0 55 3 2 1 1 0 8 0 amappl13 176 500 0 499 1 0 1 1 0 8 0 amappl12 168 4109 0 4068 3 0 3 3 0 8 0 amappl11 160 30 0 29 2 1 1 1 0 8 0 amappl10 152 52 0 37 1 0 1 1 0 8 0 amappl9 144 254 0 253 2 1 1 1 0 8 0 amappl8 136 44 0 41 1 0 1 1 0 8 0 amappl7 128 101 0 100 1 0 1 1 0 8 0 amappl6 120 354 0 340 1 0 1 1 0 8 0 amappl5 112 86 0 74 1 0 1 1 0 8 0 amappl4 104 481 0 450 1 0 1 1 0 8 0 amappl3 96 20670 0 20573 4 1 3 3 0 8 0 amappl2 88 3841 0 3765 2 0 2 2 0 8 0 amappl1 80 24525 0 23926 19 5 14 15 0 8 0 amappl 88 32817 0 32635 5 0 5 5 0 92 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 dma65536 65536 2 0 2 2 2 0 1 0 8 0 dma32768 32768 3 0 3 2 2 0 1 0 8 0 dma4096 4096 3 0 3 3 2 1 1 0 8 1 dma2048 2048 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 128 258 0 258 6 6 0 1 0 8 0 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 3685 0 3655 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3685 0 3655 1 0 1 1 0 8 0 vmmpekpl 168 31301 0 31249 3 0 3 3 0 8 0 vmmpepl 168 235913 0 233923 145 47 98 114 0 357 0 vmsppl 488 3685 0 3655 6 1 5 5 0 8 0 rwobjpl 80 65521 0 58441 161 10 151 156 0 8 0 pdppl 4096 7378 0 7310 124 50 74 84 0 8 6 pvpl 32 21588 0 0 174 1 173 173 0 265 0 pmappl 256 3685 0 3655 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 424 0 97 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83877ff0) 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(ffffffff8389d020) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8389d020) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff8389d020) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8389d020) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3886b0,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7958757d1770, count: 5 ddb{0}> trace x86_ipi_db(ffffffff83877ff0) 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(ffffffff8389d020) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8389d020) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff8389d020) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8389d020) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3886b0,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7958757d1770, count: -10 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: 0x742a4a46cbe0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x742a4a46cbe0, count: -1