uvm_fault(0xfffffd80749ee7a8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82454e60 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff800037ff71a0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82454e60 Starting stack trace... panic(ffffffff83343c2c) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff800037ff70f0) at kerntrap+0x2cb sys/arch/amd64/amd64/trap.c:482 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c41ad00) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c41ad00) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800037ff72a0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80598c26d8,81,fffffd80097fb750,ffff80003c41ad00) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8065a6ccd0,ffff80003c41ad00) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8065a6ccd0,ffff80003c41ad00) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8065a6ccd0,ffff80003c41ad00) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8065a6ccd0,ffff80003c41ad00) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c41ad00) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c41ad00,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c41ad00,ffff800037ff7610,ffff800037ff7560) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037ff7610) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037ff7610) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b97c1171150, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 -1055452872 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 57564 51683 0 0x2 0 1 syz-executor 488285 45527 0 0x14000 0x200 0 reaper savectx() at savectx+0xae end of kernel end trace frame: 0x7b97c1171120, 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(0xfffffd80749ee7a8, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7b97c1171120, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3d33f0 rbx 0 rdx 0 rcx 0xffff80002a296f80 rax 0x3c r8 0xffff80002a3d3320 r9 0x1 r10 0xc7138e3f5d8154ad r11 0x99880764f499dbd9 r12 0 r13 0 r14 0xffff80002a296f80 r15 0 rip 0xffffffff828a43ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3d3370 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=57564 pid=51683 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a297210,0xffff80003c41b750 process=0xffff80002a397088 user=0xffff80002a3ce000, vmspace=0xfffffd806eeefb48 estcpu=36, cpticks=1, pctcpu=0.26, user=1, sys=67, intr=3 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 13518 79299 75452 0 2 0 syz-executor 83680 37098 4074 0 2 0 syz-executor 83680 109081 4074 0 3 0x4000080 kqread syz-executor 83680 29191 4074 0 3 0x4000080 fsleep syz-executor 25924 366796 24469 0 3 0x80 nanoslp syz-executor 25924 85107 24469 0 3 0x4000080 fifor syz-executor 25924 304765 24469 0 3 0x4000080 fsleep syz-executor 12393 321642 12657 0 3 0x80 nanoslp syz-executor 12393 522978 12657 0 3 0x4000080 kqpoll syz-executor 12393 268006 12657 0 3 0x4000080 fsleep syz-executor 6002 3622 33377 0 3 0x80 nanoslp syz-executor 6002 298720 33377 0 3 0x4000080 netcon syz-executor 6002 176449 33377 0 3 0x4000080 fsleep syz-executor 52148 422171 0 0 3 0x14200 acct acct 24469 353829 37201 0 3 0x82 nanoslp syz-executor 52187 114076 1 0 3 0x100083 ttyin getty 12657 132024 37201 0 3 0x82 nanoslp syz-executor 33377 74914 37201 0 3 0x82 nanoslp syz-executor 2555 346431 0 0 3 0x14200 bored sosplice *51683 57564 37201 0 7 0x2 syz-executor 36467 197633 37201 0 3 0x2 biowait syz-executor 92111 310787 37201 0 3 0x82 nanoslp syz-executor 4074 491974 37201 0 3 0x82 nanoslp syz-executor 75452 146059 37201 0 2 0x2 syz-executor 37201 11661 38731 0 3 0x82 kqread syz-executor 38731 129880 3259 0 3 0x10008a sigsusp ksh 3259 24617 67804 0 3 0x98 kqread sshd-session 67804 32469 64333 0 3 0x92 kqread sshd-session 64333 245771 1 0 3 0x88 kqread sshd 78197 5193 66147 74 3 0x1100092 bpf pflogd 66147 60759 1 0 3 0x80 sbwait pflogd 84813 516793 76176 73 3 0x1100090 kqread syslogd 76176 507291 1 0 3 0x100082 sbwait syslogd 45488 363864 1 0 3 0x100080 kqread resolvd 2074 124868 47811 77 3 0x100092 kqread dhcpleased 41749 216801 47811 77 3 0x100092 kqread dhcpleased 47811 227411 1 0 3 0x80 kqread dhcpleased 95835 463933 0 0 3 0x14200 bored smr 4659 225209 0 0 3 0x14200 pgzero zerothread 2231 214592 0 0 3 0x14200 aiodoned aiodoned 45284 327184 0 0 3 0x14200 syncer update 1857 462439 0 0 3 0x14200 cleaner cleaner 45527 488285 0 0 7 0x14200 reaper 50900 34432 0 0 3 0x14200 pgdaemon pagedaemon 29467 516002 0 0 3 0x14200 bored viomb 76650 172325 0 0 3 0x40014200 acpi0 acpi0 23542 225572 0 0 3 0x40014200 idle1 47112 22491 0 0 3 0x14200 bored softnet3 92181 327051 0 0 3 0x14200 bored softnet2 65535 162503 0 0 3 0x14200 bored softnet1 95047 95742 0 0 3 0x14200 bored softnet0 54954 393857 0 0 2 0x14200 systqmp 25467 439835 0 0 3 0x14200 bored systq 16193 292118 0 0 3 0x14200 tmoslp softclockmp 74343 261965 0 0 3 0x40014200 tmoslp softclock 37309 315468 0 0 3 0x40014200 idle0 1 241412 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8068d78110) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb 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 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_lower_lookup+0x3d6 sys/uvm/uvm_fault.c:-1 #5 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1370 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 #9 recall_trap+0x8 Process 13518 (syz-executor) thread 0xffff80003c444a80 (79299) Process 36467 (syz-executor) thread 0xffff80002a297210 (197633) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10270 11172K 12644K 166960K 16220 0 pcb 17 16K 29K 166960K 688 0 rtable 201 11K 11K 166960K 735 0 pf 38 18K 19K 166960K 190 0 ifaddr 38 6K 8K 166960K 147 0 ifgroup 63 2K 3K 166960K 248 0 sysctl 4 1K 9K 166960K 19 0 counters 72 37K 38K 166960K 286 0 ioctlops 0 0K 4K 166960K 1961 0 iov 0 0K 24K 166960K 216 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1458 92K 92K 166960K 3879 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 46 0 VM map 2 1K 1K 166960K 2 0 sem 24 11K 11K 166960K 52 0 dirhash 12 2K 3K 166960K 48 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 110K 166960K 2411 0 sigio 0 0K 0K 166960K 42 0 proc 72 91K 128K 166960K 861 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 304 0 in_multi 66 4K 7K 166960K 201 0 ether_multi 1 0K 0K 166960K 19 0 mrt 1 0K 0K 166960K 21 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 1002 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 6 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 257 176K 191K 166960K 23647 0 UVM aobj 26 2K 4K 166960K 27 0 pinsyscall 42 84K 102K 166960K 3576 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 132 0 NDP 14 0K 2K 166960K 101 0 temp 80 8696K 8952K 166960K 96776 0 kqueue 17 28K 34K 166960K 502 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 120 164 0 160 1 0 1 1 0 8 0 rtentry 176 209 0 130 6 1 5 6 0 8 0 unpcb 144 1570 0 1549 12 10 2 4 0 8 1 syncache 336 7 0 7 3 3 0 1 0 8 0 tcpqe 32 10 0 10 2 2 0 1 0 8 0 tcpcb 736 1017 0 1010 20 16 4 8 0 8 2 arp 128 33 0 16 1 0 1 1 0 8 0 inpcb 328 2954 0 2943 24 17 7 7 0 8 5 nd6 144 42 0 24 1 0 1 1 0 8 0 pkpcb 40 89 0 89 4 3 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 4 0 4 2 2 0 1 0 8 0 ppxss 1192 85 0 85 2 1 1 1 0 8 1 pppxif 1504 14 0 14 3 2 1 1 0 8 1 pffrag 232 18 0 3 1 0 1 1 0 482 0 pffrnode 88 18 0 3 1 0 1 1 0 8 0 pffrent 40 29 0 14 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 pfstitem 24 131 0 25 1 0 1 1 0 8 0 pfstkey 128 131 0 25 4 0 4 4 0 8 0 pfstate 384 131 0 25 11 0 11 11 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 4 0 4 2 2 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 832 0 526 33 8 25 30 0 8 3 art_table 32 835 0 526 4 0 4 4 0 8 0 art_node 16 199 0 133 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 8 1 0 1 1 0 8 0 semupl 112 4 0 4 3 3 0 1 0 8 0 semapl 112 43 0 21 1 0 1 1 0 8 0 shmpl 112 24 0 1 1 0 1 1 0 8 0 dirhash 1024 41 0 24 3 0 3 3 0 8 0 dino2pl 256 6012 0 4501 97 1 96 96 0 8 0 ffsino 288 6012 0 4501 109 0 109 109 0 8 0 nchpl 144 9518 0 8976 64 39 25 64 0 8 0 rtmask 32 13 0 13 4 3 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 34348 0 34347 5 3 2 2 0 8 1 percpumem 16 158 0 107 1 0 1 1 0 8 0 kstatmem 264 164 0 130 4 1 3 3 0 8 0 scsiplug 72 13 0 13 4 3 1 1 0 8 1 scxspl 216 67769 0 67768 14 13 1 8 1 8 0 plimitpl 152 811 0 792 1 0 1 1 0 8 0 sigapl 424 2720 0 2669 9 2 7 8 0 8 0 knotepl 120 545 0 0 17 0 17 17 0 8 0 kqueuepl 224 960 0 945 10 8 2 5 0 8 0 pipepl 336 398 0 371 10 7 3 6 0 8 0 fdescpl 520 2676 0 2645 3 0 3 3 0 8 0 filepl 160 19596 0 19365 23 10 13 18 0 8 1 lockfpl 104 1476 0 1470 2 1 1 2 0 8 0 lockfspl 48 653 0 647 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 145 0 128 1 0 1 1 0 8 0 ucredpl 104 3863 0 3850 1 0 1 1 0 8 0 zombiepl 144 2671 0 2669 1 0 1 1 0 8 0 processpl 1240 2720 0 2669 6 1 5 6 0 8 0 procpl 656 6704 0 6645 9 2 7 8 0 8 0 srpgc 96 16 0 16 6 5 1 1 0 8 1 sosppl 168 10 0 10 5 4 1 1 0 8 1 sockpl 728 4887 0 4851 33 23 10 13 0 8 6 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 38 0 0 5 0 5 5 0 8 0 mtagpl 96 149 0 0 4 0 4 4 0 8 0 mbufpl 256 1170 0 0 73 0 73 73 0 8 0 bufpl 280 29554 0 23412 439 0 439 439 0 8 0 anonpl 32 17309 0 0 140 0 140 140 0 246 0 amapchunkpl 152 81486 0 80895 65 32 33 37 0 158 6 amappl16 200 10708 0 10635 91 72 19 41 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 125 0 113 1 0 1 1 0 8 0 amappl13 176 10 0 10 2 2 0 1 0 8 0 amappl12 168 3382 0 3352 4 1 3 3 0 8 0 amappl11 160 53 0 38 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 304 0 304 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 125 0 112 1 0 1 1 0 8 0 amappl6 120 213 0 209 1 0 1 1 0 8 0 amappl5 112 138 0 128 1 0 1 1 0 8 0 amappl4 104 338 0 317 1 0 1 1 0 8 0 amappl3 96 16686 0 16569 5 1 4 4 0 8 0 amappl2 88 708 0 644 2 0 2 2 0 8 0 amappl1 80 18389 0 17782 18 3 15 15 0 8 0 amappl 88 22502 0 22321 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 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 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 259 0 259 4 4 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 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 26 0 1 1 0 1 1 0 8 0 uaddrrnd 24 2676 0 2645 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2676 0 2645 1 0 1 1 0 8 0 vmmpekpl 168 22015 0 21960 3 0 3 3 0 8 0 vmmpepl 168 173590 0 171517 147 23 124 124 0 357 15 vmsppl 480 2675 0 2645 6 1 5 5 0 8 0 rwobjpl 72 51847 0 44886 143 3 140 140 0 8 8 pdppl 4096 5359 0 5290 109 36 73 85 0 8 4 pvpl 32 24699 0 0 199 0 199 199 0 265 0 pmappl 256 2675 0 2645 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 502 0 83 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838a4ff0) 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 msleep_nsec(ffffffff83849be8,ffffffff83849bb0,4,ffffffff833e779f,ffffffffffffffff) at msleep_nsec+0x320 sys/kern/kern_synch.c:225 reaper(ffff8000ffffcf68) at reaper+0x14b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 10 ddb{0}> trace x86_ipi_db(ffffffff838a4ff0) 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 msleep_nsec(ffffffff83849be8,ffffffff83849bb0,4,ffffffff833e779f,ffffffffffffffff) at msleep_nsec+0x320 sys/kern/kern_synch.c:225 reaper(ffff8000ffffcf68) at reaper+0x14b sys/kern/kern_exit.c:477 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: 0x7b97c1171120, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7b97c1171120, count: -1