uvm_fault(0xfffffd806c1d1b88, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff832d2c88 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff80002a355df0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff832d2c88 Starting stack trace... panic(ffffffff833b8594) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a355d40) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001660000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003ac11250) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003ac11250) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a355ef0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805e026470,81,fffffd80097fb618,ffff80003ac11250) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806a1f65d8,ffff80003ac11250) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806a1f65d8,ffff80003ac11250) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806a1f65d8,ffff80003ac11250) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806a1f65d8,ffff80003ac11250) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003ac11250) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003ac11250,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003ac11250,ffff80002a356260,ffff80002a3561b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a356260) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a356260) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70a71f3b7110, 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 * 47479 75279 0 0 0 1 syz-executor 431331 17304 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6f9f5b9bace0, 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(0xfffffd806c1d1b88, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6f9f5b9bace0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2ea150 rbx 0 rdx 0 rcx 0xffff80003ac10fb8 rax 0x2a r8 0xffff80002a2ea080 r9 0x1 r10 0x49ce32d70ca4509c r11 0x9d2c205d6476a569 r12 0 r13 0xffffffff8110e5b8 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff812764c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a2ea0d0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=47479 pid=75279 tcnt=3 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003ac11250,0xffff80003ac11790 process=0xffff80003c461848 user=0xffff80002a2e5000, vmspace=0xfffffd806d4277b0 estcpu=36, cpticks=6, pctcpu=0.0, user=5, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 5344 10668 42917 0 2 0 syz-executor 5344 480913 42917 0 3 0x4000080 fsleep syz-executor 33033 232736 79062 0 2 0 syz-executor 33033 346652 79062 0 3 0x4000080 fsleep syz-executor 16724 154640 33534 0 2 0 syz-executor 16724 106395 33534 0 3 0x4000080 fsleep syz-executor *75279 47479 94199 0 7 0 syz-executor 75279 18031 94199 0 3 0x4000080 bell syz-executor 75279 197318 94199 0 3 0x4000080 fsleep syz-executor 79062 237061 22365 0 3 0x82 nanoslp syz-executor 33534 288954 22365 0 3 0x82 nanoslp syz-executor 71942 200542 70451 0 3 0x82 sbwait sshd-session 15944 60011 22365 0 3 0x82 nanoslp syz-executor 94199 136132 22365 0 3 0x82 nanoslp syz-executor 54057 351018 22365 0 3 0x82 nanoslp syz-executor 92381 287000 22365 0 3 0x82 wait syz-executor 10538 386240 0 0 3 0x14200 bored sosplice 42917 290871 22365 0 2 0x2 syz-executor 40136 447080 22365 0 3 0x2 biowait syz-executor 22365 412885 59885 0 3 0x82 kqread syz-executor 59885 472900 64178 0 3 0x10008a sigsusp ksh 64178 94788 95596 0 3 0x98 kqread sshd-session 95596 298202 70451 0 3 0x92 kqread sshd-session 23633 385132 1 0 3 0x100083 ttyin getty 70451 16737 1 0 3 0x88 kqread sshd 5511 254210 23451 74 3 0x1100092 bpf pflogd 23451 409425 1 0 3 0x80 sbwait pflogd 73047 70231 39133 73 3 0x1100090 kqread syslogd 39133 187224 1 0 3 0x100082 sbwait syslogd 92410 455130 1 0 3 0x100080 kqread resolvd 56811 137746 10037 77 3 0x100092 kqread dhcpleased 64201 384625 10037 77 3 0x100092 kqread dhcpleased 10037 374243 1 0 3 0x80 kqread dhcpleased 38523 351645 0 0 3 0x14200 bored smr 58088 97855 0 0 2 0x14200 zerothread 64620 37312 0 0 3 0x14200 aiodoned aiodoned 95892 295680 0 0 3 0x14200 syncer update 65044 457338 0 0 3 0x14200 cleaner cleaner 17304 431331 0 0 7 0x14200 reaper 4632 494501 0 0 3 0x14200 pgdaemon pagedaemon 15542 367086 0 0 3 0x14200 bored viomb 43654 237054 0 0 3 0x40014200 acpi0 acpi0 53389 125429 0 0 3 0x40014200 idle1 78688 248137 0 0 3 0x14200 bored softnet1 9878 150820 0 0 3 0x14200 netlock softnet0 80781 29025 0 0 2 0x40014200 systqmp 73300 339256 0 0 3 0x14200 bored systq 59746 144656 0 0 3 0x14200 tmoslp softclockmp 49668 172850 0 0 3 0x40014200 tmoslp softclock 18655 284171 0 0 3 0x40014200 idle0 1 105151 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 40136 (syz-executor) thread 0xffff8000ffffcd00 (447080) Process 17304 (reaper) thread 0xffff8000ffffd9f8 (431331) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10249 11167K 12438K 166960K 15119 0 pcb 18 18K 31K 166960K 1127 0 rtable 256 16K 17K 166960K 1187 0 pf 44 19K 67486K 166960K 540 0 ifaddr 41 8K 9K 166960K 289 0 ifgroup 64 2K 3K 166960K 591 0 sysctl 4 1K 9K 166960K 50 0 counters 72 37K 38K 166960K 626 0 ioctlops 0 0K 4K 166960K 2330 0 iov 0 0K 28K 166960K 352 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1448 91K 91K 166960K 4982 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 616K 620K 166960K 109 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 187 0 dirhash 12 2K 2K 166960K 141 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 4792 0 sigio 0 0K 0K 166960K 82 0 proc 73 115K 164K 166960K 1280 0 subproc 72 4K 4K 166960K 147 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 833 0 in_multi 79 5K 7K 166960K 406 0 ether_multi 1 0K 0K 166960K 45 0 mrt 1 0K 0K 166960K 48 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 121 546K 546K 166960K 121 0 exec 0 0K 1K 166960K 1249 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 264 168K 185K 166960K 44336 0 UVM aobj 128 6K 6K 166960K 146 0 pinsyscall 44 88K 104K 166960K 6107 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 331 0 NDP 14 0K 2K 166960K 227 0 temp 87 8656K 30416K 166960K 221423 0 kqueue 14 22K 33K 166960K 1018 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 120 487 0 484 4 3 1 3 0 8 0 rtentry 176 312 0 220 6 1 5 6 0 8 0 unpcb 144 3796 0 3777 35 33 2 9 0 8 1 syncache 336 31 0 31 12 11 1 1 0 8 1 tcpqe 32 12 0 12 7 6 1 1 0 8 1 tcpcb 736 2170 0 2161 43 36 7 10 0 8 5 arp 136 49 0 31 1 0 1 1 0 8 0 inpcb 328 5764 0 5751 61 51 10 13 0 8 8 nd6 152 61 0 43 2 1 1 2 0 8 0 pkpcb 40 38 0 38 10 9 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 mppekey 1024 8 0 8 6 6 0 1 0 8 0 ppxss 1192 215 0 215 5 4 1 1 0 8 1 pppxif 1504 21 0 21 9 8 1 1 0 8 1 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 42 0 30 1 0 1 1 0 482 0 pffrnode 88 31 0 20 1 0 1 1 0 8 0 pffrent 40 72 0 60 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 9 0 9 3 3 0 1 0 8 0 pfanchor 1288 3 0 1 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 304 0 191 1 0 1 1 0 8 0 pfstkey 128 306 0 193 4 0 4 4 0 8 0 pfstate 384 303 0 192 12 0 12 12 0 8 0 pfrule 1344 34 0 29 2 1 1 2 0 8 0 rttmr 136 12 0 12 7 7 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1527 0 1143 46 21 25 31 0 8 0 art_table 40 1532 0 1143 5 0 5 5 0 8 0 art_node 32 301 0 223 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 8 1 0 1 1 0 8 0 semupl 112 8 0 8 6 6 0 1 0 8 0 semapl 112 182 0 172 1 0 1 1 0 8 0 shmpl 112 143 0 18 4 0 4 4 0 8 0 dirhash 1024 104 0 87 3 0 3 3 0 8 0 dino2pl 256 10719 0 9197 96 0 96 96 0 8 0 ffsino 296 10719 0 9197 118 0 118 118 0 8 0 nchpl 144 17338 0 16757 64 41 23 64 0 8 0 rtmask 32 43 0 43 10 9 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 60404 0 60403 11 10 1 2 0 8 0 percpumem 16 328 0 277 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 kstatmem 264 388 0 356 11 8 3 3 0 8 0 scsiplug 72 19 0 19 8 8 0 1 0 8 0 scxspl 216 110004 0 110003 16 15 1 8 1 8 0 plimitpl 152 1224 0 1207 1 0 1 1 0 8 0 sigapl 424 5003 0 4954 10 3 7 9 0 8 0 knotepl 120 764 0 0 21 0 21 21 0 8 0 kqueuepl 224 2112 0 2102 31 29 2 9 0 8 1 pipepl 344 825 0 798 24 21 3 9 0 8 0 fdescpl 528 4955 0 4923 3 0 3 3 0 8 0 filepl 160 36312 0 36081 69 55 14 22 0 8 3 lockfpl 104 1441 0 1438 1 0 1 1 0 8 0 lockfspl 48 565 0 562 1 0 1 1 0 8 0 sessionpl 144 54 0 44 1 0 1 1 0 8 0 pgrppl 48 144 0 126 1 0 1 1 0 8 0 ucredpl 104 6508 0 6495 1 0 1 1 0 8 0 zombiepl 144 4957 0 4954 2 1 1 1 0 8 0 processpl 1232 5003 0 4954 8 3 5 6 0 8 0 procpl 664 12610 0 12556 10 4 6 8 0 8 0 sosppl 168 33 0 33 9 9 0 1 0 8 0 sockpl 752 10530 0 10494 114 101 13 32 0 8 8 mcl64k 65536 20 0 0 3 0 3 3 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 36 0 0 5 0 5 5 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1334 0 0 75 0 75 75 0 8 0 bufpl 280 45716 0 39579 439 0 439 439 0 8 0 anonpl 32 14833 0 0 119 0 119 119 0 246 0 amapchunkpl 152 151704 0 151096 98 64 34 42 0 158 8 amappl16 200 15837 0 15765 152 139 13 38 0 8 1 amappl15 192 10 0 10 3 3 0 1 0 8 0 amappl14 184 7 0 6 3 2 1 1 0 8 0 amappl13 176 522 0 520 1 0 1 1 0 8 0 amappl12 168 5438 0 5394 3 0 3 3 0 8 0 amappl11 160 14 0 14 4 4 0 1 0 8 0 amappl10 152 49 0 35 1 0 1 1 0 8 0 amappl9 144 269 0 268 1 0 1 1 0 8 0 amappl8 136 45 0 41 1 0 1 1 0 8 0 amappl7 128 129 0 127 1 0 1 1 0 8 0 amappl6 120 401 0 386 1 0 1 1 0 8 0 amappl5 112 102 0 90 1 0 1 1 0 8 0 amappl4 104 594 0 563 1 0 1 1 0 8 0 amappl3 96 27476 0 27380 4 1 3 3 0 8 0 amappl2 88 5247 0 5161 3 0 3 3 0 8 0 amappl1 80 35101 0 34423 19 3 16 16 0 8 0 amappl 88 42547 0 42367 5 0 5 5 0 92 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 3 0 3 3 3 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 11 0 11 6 5 1 1 0 8 1 dma128 128 262 0 262 8 8 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 21 0 20 1 0 1 1 0 8 0 aobjpl 72 145 0 18 3 0 3 3 0 8 0 uaddrrnd 24 4955 0 4923 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4955 0 4923 1 0 1 1 0 8 0 vmmpekpl 168 38840 0 38782 3 0 3 3 0 8 0 vmmpepl 168 321111 0 318977 191 85 106 120 0 357 0 vmsppl 488 4954 0 4923 6 1 5 5 0 8 0 rwobjpl 80 87330 0 80189 159 6 153 154 0 8 0 pdppl 4096 9918 0 9846 200 124 76 86 0 8 4 pvpl 32 23488 0 0 191 1 190 190 0 265 0 pmappl 256 4954 0 4923 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 541 0 222 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83868ff0) 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(ffffffff8394b8b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8394b8b0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a244680,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 sys/dev/kcov.c:153 msleep_nsec(ffffffff838810e8,ffffffff838810b0,4,ffffffff8339cc7d,ffffffffffffffff) at msleep_nsec+0x2d3 sys/kern/kern_synch.c:209 reaper(ffff8000ffffd9f8) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff83868ff0) 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(ffffffff8394b8b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8394b8b0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a244680,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 sys/dev/kcov.c:153 msleep_nsec(ffffffff838810e8,ffffffff838810b0,4,ffffffff8339cc7d,ffffffffffffffff) at msleep_nsec+0x2d3 sys/kern/kern_synch.c:209 reaper(ffff8000ffffd9f8) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -9 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: 0x6f9f5b9bace0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6f9f5b9bace0, count: -1