uvm_fault(0xfffffd806bee0018, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81433e10 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002ebdbb60 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81433e10 Starting stack trace... panic(ffffffff8332b9a5) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002ebdbab0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800000b57000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff8000ffff39b0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff39b0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002ebdbc60) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806616e130,81,fffffd807f7d3680,ffff8000ffff39b0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80678b5cf8,ffff8000ffff39b0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80678b5cf8,ffff8000ffff39b0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80678b5cf8,ffff8000ffff39b0) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd80678b5cf8,ffff8000ffff39b0) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000ffff39b0) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000ffff39b0,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff39b0,ffff80002ebdbfd0,ffff80002ebdbf20) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ebdbfd0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebdbfd0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x748d04014410, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND *473870 62942 0 0 0 1 syz-executor 381577 54664 0 0x14000 0x40000200 0 softclock proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77547d321130, 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}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806bee0018, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77547d321130, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003a400d30 rbx 0 rdx 0 rcx 0xffff80002a3cf4b0 rax 0x2a r8 0xffff80003a400c60 r9 0x1 r10 0xc37d0b9082e90026 r11 0xe35ec87b2cb2033d r12 0 r13 0xffffffff820b0368 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff814404c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003a400cb0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=473870 pid=62942 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=0xffff80002a3ce550,0xffff80002a3ce2d0 process=0xffff8000fffe0970 user=0xffff80003a3fb000, vmspace=0xfffffd806bee0978 estcpu=36, cpticks=8, pctcpu=0.0, user=7, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *62942 473870 8649 0 7 0 syz-executor 62942 414852 8649 0 2 0x4000480 syz-executor 41190 375317 79679 0 2 0x480 syz-executor 41190 258404 79679 0 3 0x4000080 ttyout syz-executor 41190 88339 79679 0 3 0x4000080 fsleep syz-executor 2976 443196 94250 0 4 0x82000 syz-executor 2976 509410 94250 0 3 0x4082000 smrbar syz-executor 2976 414268 94250 0 3 0x4002000 suspend syz-executor 31752 317732 59861 0 2 0x480 syz-executor 31752 440369 59861 0 3 0x4000080 kqpoll syz-executor 31752 272618 59861 0 3 0x4000080 fsleep syz-executor 72994 222303 69404 0 2 0 syz-executor 72994 66437 69404 0 3 0x4000080 fsleep syz-executor 72994 467653 69404 0 3 0x4000080 kqread syz-executor 72994 301772 69404 0 3 0x4000080 kqread syz-executor 72994 276740 69404 0 3 0x4000080 fsleep syz-executor 18455 74106 16296 60929 2 0x490 syz-executor 18455 48590 16296 60929 3 0x4000090 sbwait syz-executor 18455 156442 16296 60929 3 0x4000090 fsleep syz-executor 8941 67729 1 0 3 0x80 nanoslp init 15760 148899 0 0 3 0x14200 bored sosplice 62349 125525 70194 0 2 0x482 syz-executor 59861 278969 70194 0 2 0x482 syz-executor 8649 408103 70194 0 2 0x482 syz-executor 16296 234778 70194 0 2 0x482 syz-executor 79057 7499 70194 0 2 0x482 syz-executor 79679 413136 70194 0 2 0x482 syz-executor 69404 172267 70194 0 2 0x482 syz-executor 94250 144760 70194 0 2 0x482 syz-executor 70194 169745 52477 0 3 0x82 kqread syz-executor 52477 7433 70882 0 3 0x10008a sigsusp ksh 70882 481517 36148 0 3 0x98 kqread sshd-session 36148 498192 85804 0 3 0x92 kqread sshd-session 85804 177052 1 0 3 0x88 kqread sshd 56906 464090 65988 74 2 0x1100092 pflogd 65988 165483 1 0 3 0x80 sbwait pflogd 32094 521825 52634 73 3 0x1100090 kqread syslogd 52634 126062 1 0 3 0x100082 sbwait syslogd 89618 387044 1 0 3 0x100080 kqread resolvd 29128 491384 77275 77 3 0x100092 kqread dhcpleased 28827 5640 77275 77 3 0x100092 kqread dhcpleased 77275 476416 1 0 3 0x80 kqread dhcpleased 1510 117809 0 0 2 0x14200 smr 60954 492020 0 0 3 0x14200 pgzero zerothread 44091 155227 0 0 3 0x14200 aiodoned aiodoned 44613 285363 0 0 2 0x14600 update 24061 263519 0 0 3 0x14200 cleaner cleaner 80073 121756 0 0 3 0x14200 reaper reaper 92333 282265 0 0 3 0x14200 pgdaemon pagedaemon 83202 426562 0 0 3 0x14200 bored viomb 61671 20263 0 0 3 0x40014200 acpi0 acpi0 6546 484444 0 0 3 0x40014200 idle1 11514 399949 0 0 3 0x14200 bored softnet3 68180 116958 0 0 3 0x14200 bored softnet2 98386 320902 0 0 3 0x14200 bored softnet1 80977 49648 0 0 2 0x14200 softnet0 73774 48997 0 0 2 0x14200 systqmp 47315 263841 0 0 3 0x14200 bored systq 20177 175509 0 0 2 0x14200 softclockmp 54664 381577 0 0 7 0x40014200 softclock 79083 441051 0 0 3 0x40014200 idle0 1 3267 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 2976 (syz-executor) thread 0xffff80002a3cf220 (509410) exclusive rwlock clonelk r = 0 (0xffffffff838b3fc8) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 if_clone_destroy+0x67 sys/net/if.c:-1 #3 tun_dev_close+0x1dc sys/net/if_tun.c:529 #4 spec_close+0x412 sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #6 vn_close+0xa3 sys/kern/vfs_vnops.c:292 #7 vndioctl+0xde5 sys/dev/vnd.c:474 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 11064K 11484K 166960K 12835 0 pcb 17 13K 14K 166960K 188 0 rtable 203 9K 10K 166960K 463 0 pf 37 18K 81K 166960K 126 0 ifaddr 38 6K 8K 166960K 90 0 ifgroup 60 2K 3K 166960K 153 0 sysctl 4 1K 2K 166960K 5 0 counters 66 36K 37K 166960K 170 0 ioctlops 0 0K 4K 166960K 1617 0 iov 1 2K 18K 166960K 44 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1458 92K 92K 166960K 2363 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 27 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 109 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 110K 166960K 1136 0 sigio 0 0K 0K 166960K 22 0 proc 66 91K 140K 166960K 660 0 subproc 72 4K 4K 166960K 74 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 117 0 in_multi 75 5K 7K 166960K 138 0 ether_multi 1 0K 0K 166960K 9 0 mrt 2 0K 0K 166960K 7 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 459 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 257 165K 180K 166960K 12086 0 UVM aobj 41 4K 4K 166960K 43 0 pinsyscall 42 84K 105K 166960K 2232 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 53 0 NDP 13 0K 2K 166960K 61 0 temp 65 8688K 8940K 166960K 42275 0 kqueue 14 22K 32K 166960K 189 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 120 127 0 122 2 1 1 2 0 8 0 rtentry 176 142 0 56 6 0 6 6 0 8 0 unpcb 144 679 0 655 5 3 2 4 0 8 1 syncache 336 7 0 7 4 4 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 808 337 0 330 9 7 2 8 0 8 1 arp 128 23 0 5 1 0 1 1 0 8 0 inpcb 384 1116 0 1103 13 10 3 9 0 8 0 nd6 144 30 0 8 2 0 2 2 0 8 0 pkpcb 40 8 0 8 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 40 0 40 1 0 1 1 0 8 1 pppxif 1504 9 0 9 2 2 0 1 0 8 0 pffrag 232 12 0 6 1 0 1 1 0 482 0 pffrnode 88 10 0 5 1 0 1 1 0 8 0 pffrent 40 23 0 17 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 84 0 28 1 0 1 1 0 8 0 pfstkey 128 84 0 28 2 0 2 2 0 8 0 pfstate 384 84 0 28 7 0 7 7 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 539 0 201 30 3 27 29 0 8 3 art_table 32 542 0 201 4 0 4 4 0 8 0 art_node 16 136 0 59 1 0 1 1 0 8 0 sysvmsgpl 40 47 0 9 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 106 0 96 1 0 1 1 0 8 0 shmpl 112 40 0 2 2 0 2 2 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 3459 0 1956 95 0 95 95 0 8 0 ffsino 288 3459 0 1956 109 0 109 109 0 8 0 nchpl 144 5036 0 3344 64 0 64 64 0 8 0 rtmask 32 6 0 6 2 1 1 1 0 8 1 uvmvnodes 80 3014 0 0 62 0 62 62 0 8 0 vnodes 216 3014 0 0 168 0 168 168 0 8 0 namei 1024 16482 0 16482 2 1 1 1 0 8 1 percpumem 16 100 0 52 1 0 1 1 0 8 0 kstatmem 264 88 0 62 3 1 2 3 0 8 0 scsiplug 72 6 0 6 3 2 1 1 0 8 1 scxspl 216 15528 0 15528 12 10 2 8 1 8 2 plimitpl 152 152 0 133 1 0 1 1 0 8 0 sigapl 424 1437 0 1386 7 1 6 7 0 8 0 futexpl 64 15287 0 15282 1 0 1 1 0 8 0 knotepl 120 568 0 0 17 0 17 17 0 8 0 kqueuepl 224 436 0 424 10 8 2 5 0 8 1 pipepl 336 181 0 154 3 0 3 3 0 8 0 fdescpl 520 1415 0 1383 3 0 3 3 0 8 0 filepl 160 7977 0 7739 19 7 12 15 0 8 1 lockfpl 104 316 0 314 1 0 1 1 0 8 0 lockfspl 48 108 0 106 1 0 1 1 0 8 0 sessionpl 144 27 0 19 1 0 1 1 0 8 0 pgrppl 48 46 0 30 1 0 1 1 0 8 0 ucredpl 104 1175 0 1161 1 0 1 1 0 8 0 zombiepl 144 1388 0 1386 1 0 1 1 0 8 0 processpl 1192 1437 0 1386 5 0 5 5 0 8 0 procpl 656 3114 0 3050 7 1 6 7 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 728 1972 0 1931 14 9 5 13 0 8 0 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 36 0 0 5 0 5 5 0 8 0 mtagpl 96 48 0 0 2 0 2 2 0 8 0 mbufpl 256 782 0 0 49 0 49 49 0 8 0 bufpl 280 4444 0 132 308 0 308 308 0 8 0 anonpl 32 7564 0 0 61 0 61 61 0 246 0 amapchunkpl 152 38616 0 38057 36 13 23 28 0 158 1 amappl16 200 3339 0 3302 21 18 3 15 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 173 0 162 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 2059 0 2028 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 255 0 255 1 1 0 1 0 8 0 amappl8 136 21 0 18 1 0 1 1 0 8 0 amappl7 128 114 0 102 1 0 1 1 0 8 0 amappl6 120 176 0 171 1 0 1 1 0 8 0 amappl5 112 123 0 112 1 0 1 1 0 8 0 amappl4 104 326 0 308 1 0 1 1 0 8 0 amappl3 96 7957 0 7830 5 1 4 4 0 8 0 amappl2 88 674 0 612 2 0 2 2 0 8 0 amappl1 80 13039 0 12468 14 0 14 14 0 8 0 amappl 88 11153 0 10967 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 2 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 1 1 1 0 8 1 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 42 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1415 0 1383 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1415 0 1383 1 0 1 1 0 8 0 vmmpekpl 168 12855 0 12825 2 0 2 2 0 8 0 vmmpepl 168 93106 0 91076 102 12 90 97 0 357 1 vmsppl 480 1414 0 1383 5 0 5 5 0 8 0 rwobjpl 72 27710 0 23728 75 1 74 74 0 8 0 pdppl 4096 2838 0 2766 110 38 72 86 0 8 0 pvpl 32 14889 0 0 122 2 120 120 0 265 0 pmappl 256 1414 0 1383 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 448 0 56 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8388bff0) 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(ffffffff838be940) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838be940) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838be940) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838be940) at __mp_lock+0x192 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff838be940,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x24f sys/kern/kern_synch.c:412 msleep(ffffffff8390dc80,ffffffff83818740,0,ffffffff83455dcd,0) at msleep+0x13b sys/kern/kern_synch.c:247 softclock_thread(ffff8000ffffecd0) at softclock_thread+0x11f sys/kern/kern_timeout.c:806 end trace frame: 0x0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff8388bff0) 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(ffffffff838be940) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838be940) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838be940) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838be940) at __mp_lock+0x192 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff838be940,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x24f sys/kern/kern_synch.c:412 msleep(ffffffff8390dc80,ffffffff83818740,0,ffffffff83455dcd,0) at msleep+0x13b sys/kern/kern_synch.c:247 softclock_thread(ffff8000ffffecd0) at softclock_thread+0x11f sys/kern/kern_timeout.c:806 end trace frame: 0x0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77547d321130, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77547d321130, count: -1