uvm_fault(0xfffffd8065c375e0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff8240f868 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002b415e40 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff8240f868 Starting stack trace... panic(ffffffff833dbfaf) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002b415d90) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147c000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80002a305cb8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80002a305cb8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002b415f40) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807ac5d5f8,81,fffffd80097fd340,ffff80002a305cb8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd807a83e8c8,ffff80002a305cb8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd807a83e8c8,ffff80002a305cb8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd807a83e8c8,ffff80002a305cb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd807a83e8c8,ffff80002a305cb8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a305cb8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a305cb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a305cb8,ffff80002b4162b0,ffff80002b416200) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002b4162b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002b4162b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x735cda9ccd10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 74 -185671680 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *483370 94686 0 0 0 1 syz-executor 377074 61053 0 0x14000 0x200 0 smr savectx() at savectx+0xae end of kernel end trace frame: 0x7214370a1b90, 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(0xfffffd8065c375e0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7214370a1b90, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000393eb7b0 rbx 0 rdx 0 rcx 0xffff800038be0028 rax 0x3b r8 0xffff8000393eb6e0 r9 0x1 r10 0x43efeb0df0bf1701 r11 0xb355ee4374f645c r12 0 r13 0 r14 0xffff800038be0028 r15 0 rip 0xffffffff823af3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff8000393eb730 ss 0 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=483370 pid=94686 tcnt=3 stat=onproc flags process=0 proc=0 runpri=84, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800038bd9ca8,0xffff800038be1cc0 process=0xffff80003c430028 user=0xffff8000393e6000, vmspace=0xfffffd8065c379b0 estcpu=34, cpticks=4, pctcpu=0.3, user=2, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 61161 79442 14941 0 2 0 syz-executor 61161 440206 14941 0 3 0x4000080 kqsel syz-executor 42437 76035 58721 0 2 0 syz-executor 42437 457841 58721 0 3 0x4000080 ttyin syz-executor 6443 523405 46114 0 3 0x80 nanoslp syz-executor 6443 401978 46114 0 3 0x4000080 netcon syz-executor 6443 147504 46114 0 3 0x4000080 fsleep syz-executor 12383 377281 77882 0 3 0x80 nanoslp syz-executor 12383 334408 77882 0 3 0x4000080 kqsel syz-executor 12383 85297 77882 0 3 0x4000080 fsleep syz-executor *94686 483370 93192 0 7 0 syz-executor 94686 363127 93192 0 3 0x4000080 lockf syz-executor 94686 1222 93192 0 3 0x4000080 fsleep syz-executor 58721 147990 85345 0 3 0x82 nanoslp syz-executor 14941 208178 85345 0 3 0x82 nanoslp syz-executor 93197 370135 1 0 3 0x100083 ttyopn getty 93192 475979 85345 0 3 0x82 nanoslp syz-executor 56147 124905 85345 0 3 0x82 nanoslp syz-executor 14937 203151 85345 0 3 0x82 nanoslp syz-executor 46114 386361 85345 0 3 0x82 nanoslp syz-executor 77882 27999 85345 0 3 0x82 nanoslp syz-executor 83326 210492 85345 0 3 0x82 nanoslp syz-executor 85345 475789 39702 0 3 0x82 kqread syz-executor 39702 244673 27559 0 3 0x10008a sigsusp ksh 27559 164826 16097 0 3 0x98 kqread sshd-session 16097 221866 92894 0 3 0x92 kqread sshd-session 92894 229509 1 0 3 0x88 kqread sshd 35249 400299 68768 74 3 0x1100092 bpf pflogd 68768 482502 1 0 3 0x80 sbwait pflogd 44482 228561 66463 73 3 0x1100090 kqread syslogd 66463 301777 1 0 3 0x100082 sbwait syslogd 83588 181622 1 0 3 0x100080 kqread resolvd 13431 519899 73495 77 3 0x100092 kqread dhcpleased 92406 85348 73495 77 3 0x100092 kqread dhcpleased 73495 226455 1 0 3 0x80 kqread dhcpleased 61053 377074 0 0 7 0x14200 smr 2210 80267 0 0 2 0x14200 zerothread 93782 293746 0 0 3 0x14200 aiodoned aiodoned 51696 207807 0 0 3 0x14200 syncer update 6032 85388 0 0 3 0x14200 cleaner cleaner 36197 122771 0 0 3 0x14200 reaper reaper 82019 449030 0 0 3 0x14200 pgdaemon pagedaemon 48399 502269 0 0 3 0x14200 bored viomb 98557 27880 0 0 3 0x40014200 acpi0 acpi0 11168 451347 0 0 3 0x40014200 idle1 75791 425724 0 0 3 0x14200 bored softnet1 9078 291056 0 0 3 0x14200 bored softnet0 93156 234145 0 0 2 0x14200 systqmp 53875 341777 0 0 3 0x14200 bored systq 90983 139269 0 0 3 0x14200 tmoslp softclockmp 22058 10002 0 0 3 0x40014200 tmoslp softclock 49457 116046 0 0 3 0x40014200 idle0 1 427259 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff83a0dc58) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 wakeup_n+0x54 sys/kern/kern_synch.c:579 #4 smr_thread+0x457 sys/kern/kern_smr.c:-1 #5 proc_trampoline+0x10 Process 61053 (smr) thread 0xffff8000ffffca68 (377074) Process 93156 (systqmp) thread 0xffff8000ffffe298 (234145) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10269 11157K 11925K 166960K 32602 0 pcb 20 20K 25K 166960K 3386 0 rtable 241 14K 15K 166960K 2645 0 pf 51 20K 84K 166960K 842 0 ifaddr 45 10K 13K 166960K 541 0 ifgroup 78 3K 3K 166960K 1049 0 sysctl 4 1K 9K 166960K 97 0 counters 82 38K 38K 166960K 1446 0 ioctlops 0 0K 8K 166960K 4487 0 iov 0 0K 28K 166960K 1132 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1707 107K 107K 166960K 14425 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 148 0 VM map 2 1K 1K 166960K 2 0 sem 23 137K 205K 166960K 288 0 dirhash 15 2K 3K 166960K 207 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 11384 0 sigio 0 0K 0K 166960K 296 0 proc 75 115K 164K 166960K 2511 0 subproc 72 4K 4K 166960K 365 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1674 0 in_multi 67 5K 7K 166960K 819 0 ether_multi 1 0K 0K 166960K 158 0 mrt 1 0K 0K 166960K 70 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 283 1261K 1261K 166960K 283 0 exec 0 0K 1K 166960K 2554 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 98 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 271 180K 201K 166960K 104578 0 UVM aobj 156 58K 58K 166960K 172 0 pinsyscall 43 86K 106K 166960K 13335 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 903 0 NDP 17 0K 1K 166960K 420 0 temp 167 8677K 8933K 166960K 595077 0 kqueue 13 20K 36K 166960K 2124 0 SYN cache 2 8K 16K 166960K 3 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 1236 0 1232 10 8 2 3 0 8 1 rtentry 176 783 0 697 6 0 6 6 0 8 0 unpcb 144 7025 0 7008 39 38 1 6 0 8 0 syncache 336 10 0 10 5 5 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 4380 0 4374 86 80 6 13 0 8 5 arp 136 120 0 106 1 0 1 1 0 8 0 inpcb 328 14229 0 14213 116 110 6 13 0 8 4 nd6 152 163 0 142 3 1 2 2 0 8 0 pkpcb 40 112 0 112 22 21 1 1 0 8 1 kcovpl 48 40 0 32 1 0 1 1 0 8 0 mppekey 1024 4 0 4 4 4 0 1 0 8 0 ppxss 1192 554 0 551 1 0 1 1 0 8 0 pppxif 1504 105 0 103 18 17 1 1 0 8 0 pfstscr 40 13 0 10 1 0 1 1 0 8 0 pffrag 232 98 0 82 2 1 1 2 0 482 0 pffrnode 88 72 0 58 1 0 1 1 0 8 0 pffrent 40 172 0 156 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 12 0 12 8 8 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pfstitem 24 720 0 581 1 0 1 1 0 8 0 pfstkey 128 739 0 600 5 0 5 5 0 8 0 pfstate 448 728 0 591 22 6 16 16 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 10 0 4 8 2 6 6 0 8 0 art_heap4 256 2586 0 2257 44 21 23 32 0 8 0 art_table 40 2596 0 2261 6 1 5 6 0 8 0 art_node 32 769 0 692 2 1 1 2 0 8 0 sysvmsgpl 40 22 0 13 1 0 1 1 0 8 0 semupl 112 5 0 5 5 5 0 1 0 8 0 semapl 112 275 0 254 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 149 0 130 3 0 3 3 0 8 0 dino2pl 256 23098 0 21494 101 0 101 101 0 8 0 ffsino 296 23098 0 21494 124 0 124 124 0 8 0 nchpl 144 39088 0 38452 68 39 29 67 0 8 0 rtmask 32 72 0 72 20 19 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 146004 0 146004 16 15 1 4 0 8 1 percpumem 16 738 0 682 1 0 1 1 0 8 0 vcpupl 3968 30 0 5 4 0 4 4 0 8 0 vmpool 840 33 0 8 3 0 3 3 0 8 0 kstatmem 264 676 0 638 8 5 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 65 0 65 20 19 1 1 0 8 1 scxspl 216 197351 0 197351 28 25 3 8 1 8 3 plimitpl 152 3134 0 3115 1 0 1 1 0 8 0 sigapl 424 11611 0 11563 7 1 6 7 0 8 0 knotepl 120 914 0 0 18 0 18 18 0 8 0 kqueuepl 224 4619 0 4608 46 44 2 5 0 8 1 pipepl 344 1774 0 1747 37 31 6 9 0 8 3 fdescpl 528 11554 0 11522 3 0 3 3 0 8 0 filepl 160 89053 0 88823 102 86 16 21 0 8 3 lockfpl 104 4670 0 4622 10 7 3 3 0 8 1 lockfspl 48 1848 0 1804 2 1 1 2 0 8 0 sessionpl 144 69 0 60 1 0 1 1 0 8 0 pgrppl 48 361 0 344 1 0 1 1 0 8 0 ucredpl 104 15315 0 15302 1 0 1 1 0 8 0 zombiepl 144 17158 0 17155 3 2 1 1 0 8 0 processpl 1232 11611 0 11563 6 1 5 5 0 8 0 procpl 664 31237 0 31181 9 3 6 7 0 8 0 sosppl 176 76 0 76 16 15 1 1 0 8 1 sockpl 752 23072 0 23035 161 151 10 18 0 8 6 mcl64k 65536 22 0 0 3 0 3 3 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 17 0 17 17 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 137 0 0 8 0 8 8 0 8 0 mtagpl 96 456 0 0 7 0 7 7 0 8 0 mbufpl 256 2230 0 0 121 0 121 121 0 8 0 bufpl 280 70411 0 64275 439 0 439 439 0 8 0 anonpl 32 15615 0 0 126 2 124 124 0 246 0 amapchunkpl 152 388001 0 387355 138 103 35 40 0 158 7 amappl16 200 30725 0 30584 236 215 21 34 0 8 8 amappl15 192 8 0 8 3 3 0 1 0 8 0 amappl14 184 12 0 11 1 0 1 1 0 8 0 amappl13 176 817 0 816 1 0 1 1 0 8 0 amappl12 168 12157 0 12114 3 0 3 3 0 8 0 amappl11 160 8 0 8 2 2 0 1 0 8 0 amappl10 152 68 0 53 1 0 1 1 0 8 0 amappl9 144 264 0 263 1 0 1 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 212 0 209 1 0 1 1 0 8 0 amappl6 120 689 0 675 1 0 1 1 0 8 0 amappl5 112 86 0 74 1 0 1 1 0 8 0 amappl4 104 643 0 613 1 0 1 1 0 8 0 amappl3 96 67255 0 67150 4 1 3 3 0 8 0 amappl2 88 11633 0 11551 2 0 2 2 0 8 0 amappl1 80 58339 0 57742 16 2 14 15 0 8 0 amappl 88 101494 0 101305 5 0 5 5 0 92 0 uvmvnodes 80 330 0 0 7 0 7 7 0 8 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 dma8192 8192 2 0 2 2 2 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 128 268 0 268 12 11 1 1 0 8 1 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 9 0 9 3 3 0 1 0 8 0 dma16 16 23 0 22 1 0 1 1 0 8 0 aobjpl 72 171 0 16 3 0 3 3 0 8 0 uaddrrnd 24 11554 0 11522 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11554 0 11522 1 0 1 1 0 8 0 vmmpekpl 168 77959 0 77886 4 0 4 4 0 8 0 vmmpepl 168 713728 0 711559 220 110 110 119 0 357 0 vmsppl 488 11553 0 11522 7 2 5 5 0 8 0 rwobjpl 80 168626 0 167055 55 13 42 43 0 8 0 pdppl 4096 23181 0 23085 204 108 96 99 0 8 0 pvpl 32 23282 0 0 186 2 184 184 0 265 0 pmappl 256 11586 0 11530 4 0 4 4 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 662 0 253 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83867ff0) 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 mtx_enter(ffffffff83a0dbf8) at mtx_enter smr_thread(ffff8000ffffca68) at smr_thread+0x17b sys/kern/kern_smr.c:98 end trace frame: 0x0, count: 10 ddb{0}> trace x86_ipi_db(ffffffff83867ff0) 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 mtx_enter(ffffffff83a0dbf8) at mtx_enter smr_thread(ffff8000ffffca68) at smr_thread+0x17b sys/kern/kern_smr.c:98 end trace frame: 0x0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7214370a1b90, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7214370a1b90, count: -1