uvm_fault(0xfffffd8063cac220, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff8180fc08 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c433680 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff8180fc08 Starting stack trace... panic(ffffffff833a3f01) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c4335d0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000166b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c453780) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c453780) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c433780) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80657fa2d0,81,fffffd80097fb548,ffff80003c453780) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd807d2f7d10,ffff80003c453780) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd807d2f7d10,ffff80003c453780) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd807d2f7d10,ffff80003c453780) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd807d2f7d10,ffff80003c453780) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c453780) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c453780,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c453780,ffff80003c433af0,ffff80003c433a40) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c433af0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c433af0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72f7367749b0, 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 *255537 11738 0 0 0 1 syz-executor 367649 40472 0 0x2 0x1 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7d07ff154030, 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(0xfffffd8063cac220, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7d07ff154030, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4fb3c0 rbx 0 rdx 0 rcx 0xffff80002a31c2d8 rax 0x2a r8 0xffff80003c4fb2f0 r9 0x1 r10 0x235cbc8e0cb0c76f r11 0x47ec6b02458521da r12 0 r13 0xffffffff81fea388 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff81c944c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c4fb340 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=255537 pid=11738 tcnt=2 stat=onproc flags process=0 proc=0 runpri=83, usrpri=83, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff34d0,0xffff80002a31d278 process=0xffff80003c425d00 user=0xffff80003c4f6000, vmspace=0xfffffd806ef2cb78 estcpu=33, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *11738 255537 64410 0 7 0 syz-executor 11738 475700 64410 0 3 0x4000000 biowait syz-executor 32763 277222 85252 0 2 0 syz-executor 32763 474164 85252 0 2 0x4000000 syz-executor 19873 371772 18767 0 2 0 syz-executor 19873 83156 18767 0 3 0x4000080 fsleep syz-executor 1718 196277 40472 0 2 0 syz-executor 1718 251623 40472 0 2 0x4000000 syz-executor 1718 75221 40472 0 3 0x4000080 fsleep syz-executor 7724 73842 0 0 3 0x14200 acct acct 88258 213572 1 0 3 0x4000080 fsleep syz-executor 88258 195979 1 0 3 0x4000080 sbwait syz-executor 88258 499914 1 0 3 0x4000000 inode syz-executor 88258 36896 1 0 3 0x4000000 inode syz-executor 85252 49584 39958 0 2 0xc82 syz-executor 13726 968 39958 0 3 0x82 piperd syz-executor 64410 269759 39958 0 3 0x82 nanoslp syz-executor 57558 28748 39958 0 3 0x2 biowait syz-executor 50071 87304 39958 0 2 0xc82 syz-executor 18767 342895 39958 0 3 0x82 nanoslp syz-executor 40472 367649 39958 0 7 0x3 syz-executor 83640 11325 0 0 3 0x14200 bored sosplice 39958 321467 44656 0 3 0x82 nanoslp syz-executor 44656 255587 3312 0 3 0x10008a sigsusp ksh 3312 207347 62787 0 3 0x98 kqread sshd-session 62787 335646 16887 0 3 0x92 kqread sshd-session 74691 212143 1 0 3 0x100083 ttyin getty 16887 46348 1 0 3 0x88 kqread sshd 86807 299182 34005 74 3 0x1100092 bpf pflogd 34005 60789 1 0 3 0x80 sbwait pflogd 61313 175459 33932 73 3 0x1100090 kqread syslogd 33932 482486 1 0 3 0x100082 sbwait syslogd 36822 32544 1 0 3 0x100080 kqread resolvd 12957 401174 0 0 3 0x14200 bored smr 70460 34484 0 0 2 0x14200 zerothread 21944 358107 0 0 3 0x14200 aiodoned aiodoned 54284 297729 0 0 3 0x14200 syncer update 54886 330050 0 0 3 0x14200 cleaner cleaner 5437 92117 0 0 3 0x14200 reaper reaper 45412 514930 0 0 3 0x14200 pgdaemon pagedaemon 63051 110522 0 0 3 0x14200 bored viomb 6708 188959 0 0 3 0x40014200 acpi0 acpi0 11955 516546 0 0 3 0x40014200 idle1 98688 86459 0 0 3 0x14200 bored softnet7 7910 139754 0 0 3 0x14200 bored softnet6 45878 332450 0 0 3 0x14200 bored softnet5 32380 183644 0 0 3 0x14200 bored softnet4 96454 495901 0 0 3 0x14200 bored softnet3 8342 2460 0 0 3 0x14200 bored softnet2 84002 307939 0 0 3 0x14200 bored softnet1 61457 509840 0 0 3 0x14200 netlock softnet0 8993 439875 0 0 2 0x40014200 systqmp 8289 32553 0 0 3 0x14200 bored systq 38275 297602 0 0 3 0x14200 tmoslp softclockmp 11023 82654 0 0 3 0x40014200 tmoslp softclock 34877 46603 0 0 3 0x40014200 idle0 1 290688 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 11738 (syz-executor) thread 0xffff80002a31d268 (475700) Process 88258 (syz-executor) thread 0xffff80003c452558 (195979) Process 57558 (syz-executor) thread 0xffff80003c453250 (28748) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10255 11088K 13062K 166960K 15634 0 pcb 17 16K 18K 166960K 1321 0 rtable 224 16K 17K 166960K 1206 0 pf 39 18K 131091K 166960K 643 0 ifaddr 38 10K 12K 166960K 386 0 ifgroup 59 2K 3K 166960K 777 0 sysctl 4 1K 9K 166960K 122 0 counters 70 37K 38K 166960K 816 0 ioctlops 0 0K 4K 166960K 2931 0 iov 0 0K 28K 166960K 720 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1624 102K 102K 166960K 5508 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 71 0 VM map 2 1K 1K 166960K 2 0 sem 23 17K 17K 166960K 107 0 dirhash 12 2K 2K 166960K 111 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 236K 166960K 6222 0 sigio 0 0K 0K 166960K 145 0 proc 66 83K 196K 166960K 1314 0 subproc 72 4K 6K 166960K 282 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1082 0 in_multi 74 5K 7K 166960K 516 0 ether_multi 1 0K 0K 166960K 84 0 mrt 3 0K 0K 166960K 56 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 1622 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 12 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 209 127K 171K 166960K 57216 0 UVM aobj 44 2K 4K 166960K 54 0 pinsyscall 34 68K 102K 166960K 7619 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 535 0 NDP 13 0K 2K 166960K 294 0 temp 89 8656K 8736K 166960K 300580 0 kqueue 7 12K 35K 166960K 1335 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 120 573 0 572 4 3 1 2 0 8 0 rtentry 176 365 0 290 6 0 6 6 0 8 0 unpcb 144 4898 0 4885 42 39 3 10 0 8 2 syncache 336 32 0 32 10 10 0 1 0 8 0 tcpqe 32 8 0 8 4 4 0 1 0 8 0 tcpcb 736 2157 0 2150 34 33 1 7 0 8 0 arp 136 48 0 36 1 0 1 1 0 8 0 inpcb 328 7410 0 7399 50 47 3 12 0 8 2 nd6 144 56 0 41 1 0 1 1 0 8 0 pkpcb 40 184 0 184 11 10 1 1 0 8 1 kcovpl 48 27 0 19 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 3 0 1 0 8 0 ppxss 1192 286 0 286 7 6 1 1 0 8 1 pppxif 1504 32 0 32 8 8 0 1 0 8 0 pfstscr 40 9 0 9 4 4 0 1 0 8 0 pffrag 232 77 0 66 1 0 1 1 0 482 0 pffrnode 88 49 0 38 1 0 1 1 0 8 0 pffrent 40 149 0 138 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 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 386 0 248 1 0 1 1 0 8 0 pfstkey 128 408 0 270 6 0 6 6 0 8 0 pfstate 384 395 0 259 16 0 16 16 0 8 0 pfrule 1344 45 0 39 2 1 1 2 0 8 0 rttmr 136 16 0 16 9 9 0 1 0 8 0 art_heap8 4096 6 0 2 6 2 4 6 0 8 0 art_heap4 256 1824 0 1471 49 22 27 31 0 8 0 art_table 40 1830 0 1473 6 1 5 6 0 8 0 art_node 32 353 0 289 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 101 0 80 1 0 1 1 0 8 0 shmpl 112 51 0 10 2 0 2 2 0 8 0 dirhash 1024 84 0 67 3 0 3 3 0 8 0 dino2pl 256 13463 0 11922 98 1 97 97 0 8 0 ffsino 296 13463 0 11922 119 0 119 119 0 8 0 nchpl 144 22584 0 21954 64 38 26 64 0 8 0 rtmask 32 57 0 57 6 6 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 78578 0 78578 7 6 1 2 0 8 1 percpumem 16 423 0 373 1 0 1 1 0 8 0 kstatmem 264 520 0 490 3 0 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 22 0 22 9 9 0 1 0 8 0 scxspl 216 131793 0 131791 29 27 2 8 1 8 1 plimitpl 152 1696 0 1679 1 0 1 1 0 8 0 sigapl 424 6525 0 6475 9 0 9 9 0 8 1 knotepl 120 906 0 0 24 0 24 24 0 8 0 kqueuepl 224 2525 0 2519 22 21 1 5 0 8 0 pipepl 344 924 0 896 21 16 5 9 0 8 2 fdescpl 528 6449 0 6423 3 0 3 3 0 8 0 filepl 160 46452 0 46248 57 43 14 20 0 8 2 lockfpl 104 3141 0 3139 4 2 2 2 0 8 1 lockfspl 48 939 0 937 1 0 1 1 0 8 0 sessionpl 144 61 0 53 1 0 1 1 0 8 0 pgrppl 48 252 0 236 1 0 1 1 0 8 0 ucredpl 104 8464 0 8453 1 0 1 1 0 8 0 zombiepl 144 6979 0 6978 1 0 1 1 0 8 0 processpl 1232 6525 0 6475 6 0 6 6 0 8 0 procpl 664 16513 0 16455 9 1 8 8 0 8 1 sosppl 168 50 0 50 12 11 1 1 0 8 1 sockpl 752 13382 0 13357 106 97 9 27 0 8 5 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 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 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 136 0 0 17 0 17 17 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 105 0 0 7 0 7 7 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 1232 0 0 74 0 74 74 0 8 0 bufpl 280 57874 0 51731 441 1 440 440 0 8 0 anonpl 32 13579 0 0 109 0 109 109 0 246 0 amapchunkpl 152 199759 0 199213 83 49 34 38 0 158 4 amappl16 200 22913 0 22759 128 105 23 29 0 8 0 amappl15 192 9 0 9 4 4 0 1 0 8 0 amappl14 184 205 0 196 1 0 1 1 0 8 0 amappl13 176 39 0 36 1 0 1 1 0 8 0 amappl12 168 7286 0 7260 3 1 2 2 0 8 0 amappl11 160 51 0 43 1 0 1 1 0 8 0 amappl10 152 23 0 23 2 2 0 1 0 8 0 amappl9 144 252 0 251 2 1 1 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 155 0 144 1 0 1 1 0 8 0 amappl6 120 292 0 288 1 0 1 1 0 8 0 amappl5 112 171 0 164 1 0 1 1 0 8 0 amappl4 104 463 0 442 1 0 1 1 0 8 0 amappl3 96 35993 0 35913 4 0 4 4 0 8 0 amappl2 88 6892 0 6831 2 0 2 2 0 8 0 amappl1 80 39518 0 39016 16 1 15 15 0 8 0 amappl 88 55166 0 55011 5 0 5 5 0 92 0 dma65536 65536 2 0 2 2 2 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 2 0 2 2 1 1 1 0 8 1 dma4096 4096 3 0 3 3 3 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 9 0 9 4 3 1 1 0 8 1 dma128 128 259 0 259 7 7 0 1 0 8 0 dma64 64 9 0 9 4 4 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 22 0 21 1 0 1 1 0 8 0 aobjpl 72 53 0 10 1 0 1 1 0 8 0 uaddrrnd 24 6449 0 6423 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6449 0 6423 1 0 1 1 0 8 0 vmmpekpl 168 49813 0 49746 5 1 4 4 0 8 0 vmmpepl 168 412909 0 411162 163 64 99 114 0 357 1 vmsppl 488 6448 0 6423 9 4 5 5 0 8 1 rwobjpl 80 108098 0 101207 169 21 148 152 0 8 0 pdppl 4096 12906 0 12846 142 76 66 84 0 8 6 pvpl 32 22303 0 0 178 1 177 177 0 265 0 pmappl 256 6448 0 6423 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 473 0 166 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f0ff0) 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(ffffffff8391e360) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) 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(ffffffff8391e360) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3fbb70,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8391e360) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsysret(ffff80002a31caa0,b,0,ffff80002a3fbd60) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a31caa0,b,0,ffff80002a3fbd60) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a3fbe10) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a3fbe10) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:767 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d7a65dd21b0, count: 1 ddb{0}> trace x86_ipi_db(ffffffff837f0ff0) 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(ffffffff8391e360) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) 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(ffffffff8391e360) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3fbb70,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8391e360) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsysret(ffff80002a31caa0,b,0,ffff80002a3fbd60) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a31caa0,b,0,ffff80002a3fbd60) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a3fbe10) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a3fbe10) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:767 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d7a65dd21b0, count: -14 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: 0x7d07ff154030, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7d07ff154030, count: -1