uvm_fault(0xfffffd806b9a59a0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff822ec438 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a3c96b0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff822ec438 Starting stack trace... panic(ffffffff8339fd66) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a3c9600) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015ed000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff800033809a28) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800033809a28) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3c97b0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a601558,81,fffffd80097fb820,ffff800033809a28) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806fbe3000,ffff800033809a28) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806fbe3000,ffff800033809a28) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806fbe3000,ffff800033809a28) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806fbe3000,ffff800033809a28) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800033809a28) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800033809a28,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800033809a28,ffff80002a3c9b20,ffff80002a3c9a70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3c9b20) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3c9b20) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70e9e144bd10, count: 242 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 * 68740 52398 0 0 0 1 syz-executor 120177 54588 0 0 0 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7b1e15e84d10, 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(0xfffffd806b9a59a0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7b1e15e84d10, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3bde00 rbx 0 rdx 0 rcx 0xffff8000370214f0 rax 0x2a r8 0xffff80002a3bdd30 r9 0x1 r10 0xecfd44c14a420a23 r11 0x6a91b74c50744fba r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81acf4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3bdd80 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=68740 pid=52398 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800037020a90,0xffff800037020fd0 process=0xffff800037024020 user=0xffff80002a3b8000, vmspace=0xfffffd805c5403f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25325 129542 56272 0 2 0 syz-executor *52398 68740 71719 0 7 0 syz-executor 54588 120177 94784 0 7 0 syz-executor 54588 311575 94784 0 3 0x4000080 fsleep syz-executor 94784 430607 74921 0 3 0x82 nanoslp syz-executor 16319 32949 74921 0 3 0x82 nanoslp syz-executor 71719 466799 74921 0 3 0x82 nanoslp syz-executor 66428 121636 74921 0 3 0x82 wait syz-executor 33939 98748 74921 0 3 0x82 nanoslp syz-executor 56272 252550 74921 0 3 0x82 nanoslp syz-executor 84167 415603 74921 0 3 0x82 nanoslp syz-executor 53916 462981 74921 0 3 0x82 nanoslp syz-executor 16831 434938 0 0 3 0x14200 bored sosplice 74921 509888 80075 0 3 0x82 kqread syz-executor 80075 145651 28602 0 3 0x10008a sigsusp ksh 28602 450867 39617 0 3 0x98 kqread sshd-session 39617 109447 29196 0 3 0x92 kqread sshd-session 45382 47405 1 0 3 0x100083 ttyin getty 29196 91555 1 0 3 0x88 kqread sshd 55687 469274 75437 74 3 0x1100092 bpf pflogd 75437 424363 1 0 3 0x80 sbwait pflogd 80945 120296 88452 73 3 0x1100090 kqread syslogd 88452 284705 1 0 3 0x100082 sbwait syslogd 12605 411413 1 0 3 0x100080 kqread resolvd 69976 291162 0 0 3 0x14200 bored smr 28322 214977 0 0 3 0x14200 pgzero zerothread 95764 144900 0 0 3 0x14200 aiodoned aiodoned 7071 503206 0 0 3 0x14200 syncer update 84182 84208 0 0 3 0x14200 cleaner cleaner 23837 172269 0 0 3 0x14200 reaper reaper 58156 472639 0 0 3 0x14200 pgdaemon pagedaemon 49586 452682 0 0 3 0x14200 bored viomb 22381 217928 0 0 3 0x40014200 acpi0 acpi0 76501 277660 0 0 3 0x40014200 idle1 67284 331657 0 0 3 0x14200 bored softnet7 13967 30716 0 0 3 0x14200 bored softnet6 37099 385746 0 0 3 0x14200 bored softnet5 61601 286577 0 0 3 0x14200 bored softnet4 17397 233032 0 0 3 0x14200 bored softnet3 37642 2085 0 0 3 0x14200 bored softnet2 69535 429104 0 0 3 0x14200 bored softnet1 80587 318033 0 0 3 0x14200 netlock softnet0 1115 49144 0 0 2 0x40014200 systqmp 38871 206941 0 0 3 0x14200 bored systq 62860 172775 0 0 3 0x14200 tmoslp softclockmp 1329 401211 0 0 3 0x40014200 tmoslp softclock 94576 98276 0 0 3 0x40014200 idle0 1 345823 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 54588 (syz-executor) thread 0xffff800037021258 (120177) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10266 11098K 12433K 166960K 16600 0 pcb 17 18K 34K 166960K 1824 0 rtable 161 14K 15K 166960K 1515 0 pf 42 19K 131090K 166960K 709 0 ifaddr 29 5K 8K 166960K 364 0 ifgroup 63 2K 3K 166960K 724 0 sysctl 4 1K 9K 166960K 189 0 counters 72 37K 38K 166960K 748 0 ioctlops 0 0K 5K 166960K 3166 0 iov 0 0K 28K 166960K 671 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1454 91K 92K 166960K 6635 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 83 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 403 0 dirhash 12 2K 2K 166960K 114 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 6514 0 sigio 0 0K 0K 166960K 186 0 proc 68 99K 164K 166960K 1549 0 subproc 72 4K 4K 166960K 185 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 919 0 in_multi 28 2K 7K 166960K 506 0 ether_multi 1 0K 0K 166960K 80 0 mrt 1 0K 0K 166960K 32 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 289 1288K 1288K 166960K 289 0 exec 0 0K 1K 166960K 1990 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 15 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 145K 185K 166960K 59954 0 UVM aobj 129 10K 10K 166960K 141 0 pinsyscall 37 74K 104K 166960K 7934 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 440 0 NDP 14 0K 2K 166960K 272 0 temp 87 8652K 8781K 166960K 325635 0 kqueue 7 12K 33K 166960K 1524 0 SYN cache 2 0K 16K 166960K 4 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 120 956 0 955 9 7 2 3 0 8 1 rtentry 176 497 0 455 5 1 4 5 0 8 0 unpcb 144 4629 0 4618 28 27 1 6 0 8 0 syncache 336 23 0 23 9 9 0 1 0 8 0 tcpqe 32 5 0 5 5 5 0 1 0 8 0 tcpcb 736 2585 0 2580 36 29 7 7 0 8 6 arp 136 89 0 80 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 7867 0 7859 58 51 7 12 0 8 4 nd6 144 71 0 65 1 0 1 1 0 8 0 pkpcb 40 139 0 139 6 6 0 1 0 8 0 kcovpl 48 20 0 12 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 2 0 1 0 8 0 ppxss 1192 250 0 250 5 4 1 1 0 8 1 pppxif 1504 41 0 41 10 9 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 66 0 51 1 0 1 1 0 482 0 pffrnode 88 47 0 38 1 0 1 1 0 8 0 pffrent 40 107 0 92 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 28 0 28 8 8 0 1 0 8 0 pfanchor 1288 7 0 7 2 2 0 1 0 8 0 pftag 88 4 0 4 2 2 0 1 0 8 0 pfstitem 24 380 0 247 1 0 1 1 0 8 0 pfstkey 128 386 0 253 5 0 5 5 0 8 0 pfstate 384 382 0 250 14 0 14 14 0 8 0 pfrule 1344 28 0 23 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 8 0 3 8 2 6 6 0 8 1 art_heap4 256 1672 0 1516 36 15 21 30 0 8 2 art_table 40 1680 0 1519 5 0 5 5 0 8 0 art_node 32 488 0 455 2 0 2 2 0 8 0 sysvmsgpl 40 21 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 383 0 373 1 0 1 1 0 8 0 shmpl 112 138 0 12 4 0 4 4 0 8 0 dirhash 1024 86 0 69 3 0 3 3 0 8 0 dino2pl 256 14487 0 12947 97 0 97 97 0 8 0 ffsino 296 14487 0 12947 120 0 120 120 0 8 0 nchpl 144 24087 0 23458 64 38 26 64 0 8 0 rtmask 32 51 0 51 8 7 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 85841 0 85841 4 3 1 2 0 8 1 percpumem 16 389 0 338 1 0 1 1 0 8 0 pfiaddrpl 120 5 0 5 2 2 0 1 0 8 0 kstatmem 264 462 0 428 7 4 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 36 0 36 10 9 1 1 0 8 1 scxspl 216 170211 0 170211 22 20 2 8 1 8 2 plimitpl 152 2025 0 2008 1 0 1 1 0 8 0 sigapl 424 6768 0 6716 7 0 7 7 0 8 0 knotepl 120 827 0 0 24 0 24 24 0 8 0 kqueuepl 224 3302 0 3296 33 28 5 5 0 8 4 pipepl 344 1042 0 1014 29 21 8 9 0 8 5 fdescpl 528 6725 0 6696 3 0 3 3 0 8 0 filepl 160 51042 0 50837 50 35 15 22 0 8 1 lockfpl 104 2898 0 2897 4 2 2 2 0 8 1 lockfspl 48 833 0 832 1 0 1 1 0 8 0 sessionpl 144 51 0 43 1 0 1 1 0 8 0 pgrppl 48 150 0 134 1 0 1 1 0 8 0 ucredpl 104 9795 0 9785 1 0 1 1 0 8 0 zombiepl 144 9269 0 9264 1 0 1 1 0 8 0 processpl 1232 6768 0 6716 5 0 5 5 0 8 0 procpl 664 17841 0 17788 8 1 7 7 0 8 0 sosppl 168 54 0 54 8 7 1 1 0 8 1 sockpl 752 14019 0 13999 97 87 10 22 0 8 6 mcl64k 65536 27 0 0 4 0 4 4 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 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 84 0 0 7 0 7 7 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 6605 0 0 411 0 411 411 0 8 0 bufpl 280 71803 0 65660 441 1 440 440 0 8 0 anonpl 32 16405 0 0 132 0 132 132 0 246 0 amapchunkpl 152 210629 0 210024 91 58 33 42 0 158 5 amappl16 200 25364 0 25198 194 170 24 36 0 8 6 amappl15 192 9 0 9 2 2 0 1 0 8 0 amappl14 184 174 0 165 1 0 1 1 0 8 0 amappl13 176 8 0 8 2 2 0 1 0 8 0 amappl12 168 7662 0 7635 3 1 2 2 0 8 0 amappl11 160 53 0 45 1 0 1 1 0 8 0 amappl10 152 12 0 10 1 0 1 1 0 8 0 amappl9 144 248 0 247 2 1 1 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 146 0 137 1 0 1 1 0 8 0 amappl6 120 318 0 313 1 0 1 1 0 8 0 amappl5 112 172 0 165 1 0 1 1 0 8 0 amappl4 104 421 0 402 1 0 1 1 0 8 0 amappl3 96 38411 0 38325 4 1 3 3 0 8 0 amappl2 88 7116 0 7054 2 0 2 2 0 8 0 amappl1 80 39177 0 38666 17 3 14 16 0 8 0 amappl 88 57836 0 57664 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 2 0 2 2 2 0 1 0 8 0 dma8192 8192 3 0 3 3 2 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 11 0 11 5 4 1 1 0 8 1 dma128 128 263 0 263 7 6 1 1 0 8 1 dma64 64 9 0 9 2 1 1 1 0 8 1 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 23 0 22 1 0 1 1 0 8 0 aobjpl 72 140 0 12 3 0 3 3 0 8 0 uaddrrnd 24 6725 0 6696 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6725 0 6696 1 0 1 1 0 8 0 vmmpekpl 168 47806 0 47745 4 0 4 4 0 8 0 vmmpepl 168 427445 0 425560 174 67 107 112 0 357 12 vmsppl 488 6724 0 6696 6 1 5 5 0 8 0 rwobjpl 80 114529 0 107522 164 9 155 155 0 8 4 pdppl 4096 13458 0 13392 152 86 66 86 0 8 0 pvpl 32 26665 0 0 213 0 213 213 0 265 0 pmappl 256 6724 0 6696 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 803 0 157 19 0 19 19 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83787ff0) 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(ffffffff838e5538) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e5538) 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(ffffffff838e5538) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e5538) at __mp_lock+0x199 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(ffffffff838e5538) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e5538) at __mp_lock+0x199 sys/kern/kern_lock.c:165 uvm_fault(fffffd805c540210,50cb11ca000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80002a2c9d30,50cb11ca000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 end trace frame: 0xffff80002a2c9d20, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83787ff0) 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(ffffffff838e5538) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e5538) 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(ffffffff838e5538) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e5538) at __mp_lock+0x199 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(ffffffff838e5538) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e5538) at __mp_lock+0x199 sys/kern/kern_lock.c:165 uvm_fault(fffffd805c540210,50cb11ca000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80002a2c9d30,50cb11ca000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a2c9d30) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x795ee9550ac0, count: -16 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: 0x7b1e15e84d10, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7b1e15e84d10, count: -1