uvm_fault(0xfffffd805d4983e8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff827c77a0 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff8000393f1d80 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff827c77a0 Starting stack trace... panic(ffffffff833303aa) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000393f1cd0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015e8000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff80003c42a2d0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c42a2d0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000393f1e80) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c53e290,81,fffffd807f7d3138,ffff80003c42a2d0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c915398,ffff80003c42a2d0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c915398,ffff80003c42a2d0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c915398,ffff80003c42a2d0) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd805c915398,ffff80003c42a2d0) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff80003c42a2d0) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff80003c42a2d0,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c42a2d0,ffff8000393f21f0,ffff8000393f2140) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000393f21f0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000393f21f0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70c5b7f66530, 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 *276253 89293 0 0 0 1 syz-executor 170033 23726 0 0 0 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ad8a4b3da10, 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(0xfffffd805d4983e8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ad8a4b3da10, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800039c00510 rbx 0 rdx 0 rcx 0xffff80002a2a94b8 rax 0x2a r8 0xffff800039c00440 r9 0x1 r10 0x3de91d392f6a5c6a r11 0x215c53d3b9a12768 r12 0 r13 0xffffffff81377068 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff821614c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800039c00490 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=276253 pid=89293 tcnt=2 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=0xffff8000ffffd1f8,0xffff80002a280d00 process=0xffff8000347d9300 user=0xffff800039bfb000, vmspace=0xfffffd8009ede1e0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *89293 276253 62535 0 7 0 syz-executor 89293 386194 62535 0 2 0x4000000 syz-executor 23726 170033 69317 0 7 0 syz-executor 23726 502906 69317 0 3 0x4000000 biowait syz-executor 19292 504636 11030 0 2 0 syz-executor 19292 298552 11030 0 3 0x4000080 fsleep syz-executor 86300 46401 12779 0 3 0x80 nanoslp syz-executor 86300 504720 12779 0 3 0x4000080 fsleep syz-executor 86300 140562 12779 0 3 0x4000080 lockf syz-executor 86300 247698 12779 0 3 0x4000080 fsleep syz-executor 86300 421301 12779 0 3 0x4000080 fsleep syz-executor 99028 494920 86541 0 3 0x80 nanoslp syz-executor 99028 385951 86541 0 3 0x4000080 lockf syz-executor 99028 235531 86541 0 3 0x4000080 fsleep syz-executor 73122 305584 29672 0 3 0x2 getblk syz-executor 83143 130630 0 0 3 0x14200 acct acct 46535 351642 1 0 3 0x100083 ttyin getty 11030 468433 29672 0 3 0x82 nanoslp syz-executor 69317 496133 29672 0 3 0x82 nanoslp syz-executor 10394 360510 29672 0 2 0x2 syz-executor 62535 424891 29672 0 3 0x82 nanoslp syz-executor 12779 441547 29672 0 3 0x82 nanoslp syz-executor 95884 406072 0 0 3 0x14200 bored sosplice 86541 23511 29672 0 2 0x2 syz-executor 49804 313384 29672 0 3 0x82 nanoslp syz-executor 29672 220889 52475 0 3 0x82 kqread syz-executor 52475 194713 8285 0 3 0x10008a sigsusp ksh 8285 449272 78813 0 3 0x98 kqread sshd-session 78813 224882 38481 0 3 0x92 kqread sshd-session 38481 499517 1 0 3 0x88 kqread sshd 60585 42034 4188 74 3 0x1100092 bpf pflogd 4188 485311 1 0 3 0x80 sbwait pflogd 20170 114140 47535 73 3 0x1100090 kqread syslogd 47535 439499 1 0 3 0x100082 sbwait syslogd 30382 385622 1 0 3 0x100080 kqread resolvd 22299 159089 45803 77 3 0x100092 kqread dhcpleased 94816 195805 45803 77 3 0x100092 kqread dhcpleased 45803 467440 1 0 3 0x80 kqread dhcpleased 35052 245452 0 0 3 0x14200 bored smr 84081 205264 0 0 2 0x14200 zerothread 88545 299152 0 0 3 0x14200 aiodoned aiodoned 67306 485804 0 0 3 0x14200 syncer update 9826 233171 0 0 3 0x14200 cleaner cleaner 91797 377992 0 0 3 0x14200 reaper reaper 77498 501053 0 0 3 0x14200 pgdaemon pagedaemon 67653 224349 0 0 3 0x14200 bored viomb 70654 10644 0 0 3 0x40014200 acpi0 acpi0 80310 39887 0 0 3 0x40014200 idle1 86979 481231 0 0 3 0x14200 bored softnet3 26101 328013 0 0 3 0x14200 bored softnet2 19103 79439 0 0 3 0x14200 bored softnet1 47320 23381 0 0 3 0x14200 netlock softnet0 39857 230046 0 0 2 0x14200 systqmp 37731 278351 0 0 3 0x14200 bored systq 17844 364426 0 0 3 0x14200 tmoslp softclockmp 60160 22887 0 0 3 0x40014200 tmoslp softclock 18502 429706 0 0 3 0x40014200 idle0 1 419573 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 23726 (syz-executor) thread 0xffff8000ffffd1f8 (502906) Process 73122 (syz-executor) thread 0xffff80002a2a8d08 (305584) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10247 11100K 11931K 166960K 16131 0 pcb 19 18K 21K 166960K 857 0 rtable 221 12K 12K 166960K 1087 0 pf 38 18K 20K 166960K 339 0 ifaddr 43 9K 9K 166960K 239 0 ifgroup 63 2K 2K 166960K 461 0 sysctl 4 1K 1K 166960K 6 0 counters 68 36K 37K 166960K 542 0 ioctlops 0 0K 4K 166960K 2317 0 iov 0 0K 32K 166960K 385 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1690 106K 106K 166960K 5068 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 20K 24K 166960K 80 0 VM map 2 1K 1K 166960K 2 0 sem 25 52K 55K 166960K 46 0 dirhash 15 2K 3K 166960K 111 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 232K 166960K 3892 0 sigio 0 0K 0K 166960K 71 0 proc 73 91K 140K 166960K 1236 0 subproc 72 4K 4K 166960K 164 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 681 0 in_multi 85 6K 7K 166960K 335 0 ether_multi 1 0K 0K 166960K 24 0 mrt 1 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 1233 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 38 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 257 170K 192K 166960K 36141 0 UVM aobj 374 76K 76K 166960K 386 0 pinsyscall 42 84K 106K 166960K 5269 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 303 0 NDP 16 0K 2K 166960K 169 0 temp 85 8664K 8920K 166960K 189052 0 kqueue 13 20K 33K 166960K 676 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 120 490 0 487 6 5 1 3 0 8 0 rtentry 176 325 0 234 6 1 5 6 0 8 0 unpcb 144 2654 0 2633 21 13 8 9 0 8 7 syncache 336 16 0 16 8 8 0 1 0 8 0 tcpqe 32 3 0 3 3 3 0 1 0 8 0 tcpcb 808 1544 0 1538 48 46 2 14 0 8 1 arp 128 54 0 35 1 0 1 1 0 8 0 inpcb 384 4962 0 4948 76 72 4 24 0 8 2 nd6 144 68 0 47 1 0 1 1 0 8 0 pkpcb 40 58 0 58 10 9 1 1 0 8 1 kcovpl 48 18 0 10 1 0 1 1 0 8 0 mppekey 1024 9 0 9 5 4 1 1 0 8 1 ppxss 1192 176 0 176 6 5 1 1 0 8 1 pppxif 1504 95 0 95 10 9 1 1 0 8 1 pffrag 232 23 0 18 1 0 1 1 0 482 0 pffrnode 88 19 0 14 1 0 1 1 0 8 0 pffrent 40 44 0 39 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 1 1 1 0 1 0 8 0 pfstitem 24 225 0 158 1 0 1 1 0 8 0 pfstkey 128 225 0 158 3 0 3 3 0 8 0 pfstate 384 225 0 158 9 1 8 8 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1287 0 878 40 14 26 29 0 8 0 art_table 32 1291 0 878 4 0 4 4 0 8 0 art_node 16 308 0 231 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 14 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 36 0 13 1 0 1 1 0 8 0 shmpl 112 383 0 12 11 0 11 11 0 8 0 dirhash 1024 84 0 65 3 0 3 3 0 8 0 dino2pl 256 9345 0 7820 96 0 96 96 0 8 0 ffsino 288 9346 0 7820 110 0 110 110 0 8 0 nchpl 144 14904 0 14328 64 39 25 64 0 8 0 rtmask 32 11 0 11 5 5 0 1 0 8 0 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 55729 0 55727 4 3 1 2 0 8 0 percpumem 16 286 0 237 1 0 1 1 0 8 0 kstatmem 264 262 0 234 6 3 3 3 0 8 0 acpiwqpl 32 35 0 35 1 0 1 1 1 8 1 scsiplug 72 15 0 15 8 7 1 1 0 8 1 scxspl 216 46839 0 46838 15 14 1 8 1 8 0 plimitpl 152 760 0 742 1 0 1 1 0 8 0 sigapl 424 4198 0 4147 11 4 7 9 0 8 0 knotepl 120 655 0 0 17 0 17 17 0 8 0 kqueuepl 224 1541 0 1531 17 16 1 5 0 8 0 pipepl 336 659 0 632 15 12 3 8 0 8 0 fdescpl 520 4150 0 4119 3 0 3 3 0 8 0 filepl 160 32790 0 32554 54 35 19 20 0 8 6 lockfpl 104 1418 0 1411 3 2 1 2 0 8 0 lockfspl 48 473 0 469 1 0 1 1 0 8 0 sessionpl 144 43 0 34 1 0 1 1 0 8 0 pgrppl 48 210 0 193 1 0 1 1 0 8 0 ucredpl 104 6681 0 6667 1 0 1 1 0 8 0 zombiepl 144 4479 0 4477 2 1 1 1 0 8 0 processpl 1208 4198 0 4147 6 0 6 6 0 8 0 procpl 656 9758 0 9698 9 3 6 8 0 8 0 srpgc 96 16 0 16 6 6 0 1 0 8 0 sosppl 168 31 0 31 4 4 0 1 0 8 0 sockpl 728 8349 0 8310 92 81 11 24 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 105 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 40 0 0 5 0 5 5 0 8 0 mtagpl 96 209 0 0 6 0 6 6 0 8 0 mbufpl 256 2420 0 0 152 0 152 152 0 8 0 bufpl 280 14820 0 8678 440 1 439 440 0 8 0 anonpl 32 15641 0 0 126 0 126 126 0 246 0 amapchunkpl 152 133885 0 133272 73 41 32 42 0 158 4 amappl16 200 10150 0 9734 58 24 34 35 0 8 1 amappl15 192 11 0 11 4 4 0 1 0 8 0 amappl14 184 153 0 141 1 0 1 1 0 8 0 amappl13 176 6 0 5 2 1 1 1 0 8 0 amappl12 168 4958 0 4927 3 1 2 2 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 40 0 40 2 2 0 1 0 8 0 amappl9 144 244 0 243 2 1 1 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 152 0 139 1 0 1 1 0 8 0 amappl6 120 287 0 283 1 0 1 1 0 8 0 amappl5 112 173 0 163 1 0 1 1 0 8 0 amappl4 104 396 0 373 1 0 1 1 0 8 0 amappl3 96 25911 0 25797 4 0 4 4 0 8 0 amappl2 88 847 0 783 2 0 2 2 0 8 0 amappl1 80 25813 0 25202 16 1 15 15 0 8 0 amappl 88 34532 0 34349 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 4 0 4 2 2 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 10 0 10 5 5 0 1 0 8 0 dma128 128 256 0 256 4 4 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 385 0 12 7 0 7 7 0 8 0 uaddrrnd 24 4150 0 4119 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4150 0 4119 1 0 1 1 0 8 0 vmmpekpl 168 30092 0 30026 5 1 4 4 0 8 0 vmmpepl 168 261436 0 258995 154 32 122 130 0 357 4 vmsppl 480 4149 0 4119 7 2 5 5 0 8 0 rwobjpl 72 67163 0 59513 150 7 143 143 0 8 1 pdppl 4096 8307 0 8238 149 76 73 87 0 8 4 pvpl 32 24118 0 0 195 1 194 194 0 265 0 pmappl 256 4149 0 4119 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 672 0 175 15 0 15 15 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8382eff0) 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(ffffffff838f9c78) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f9c78) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff838f9c78) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f9c78) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff80003c481620,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x76b1721afda0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff8382eff0) 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(ffffffff838f9c78) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f9c78) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff838f9c78) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f9c78) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff80003c481620,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x76b1721afda0, count: -11 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: 0x7ad8a4b3da10, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ad8a4b3da10, count: -1