login: uvm_fault(0xfffffd8061d67220, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81374ca8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c42b3f0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81374ca8 Starting stack trace... panic(ffffffff833c0ea4) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c42b340) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(51e5f,81,2000,ffff8000fffeed10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(51e5f,81,2000,ffff8000fffeed10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c42b4f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066bfb2e8,81,fffffd80097fb680,ffff8000fffeed10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805fadd990,ffff8000fffeed10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805fadd990,ffff8000fffeed10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805fadd990,ffff8000fffeed10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805fadd990,ffff8000fffeed10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeed10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeed10,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeed10,ffff80003c42b860,ffff80003c42b7b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c42b860) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42b860) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b570c8111d0, 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 * 59512 52062 0 0 0 1 syz-executor 513539 42782 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7e2b3da4f450, 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(0xfffffd8061d67220, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7e2b3da4f450, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c47f790 rbx 0 rdx 0 rcx 0xffff8000fffe7a10 rax 0x2a r8 0xffff80003c47f6c0 r9 0x1 r10 0x1c812e360b871f4d r11 0xa6389188e8eb9c1b r12 0 r13 0xffffffff8167b268 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff8264e4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c47f710 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=59512 pid=52062 tcnt=3 stat=onproc flags process=0 proc=0 runpri=85, usrpri=85, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffef240,0xffff8000fffe6560 process=0xffff80003c41c4f0 user=0xffff80003c47a000, vmspace=0xfffffd805eff17d0 estcpu=35, cpticks=35, pctcpu=0.28, user=28, sys=7, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56650 345045 2730 0 3 0 vmmaplk syz-executor 56650 400327 2730 0 2 0x4000000 syz-executor 63819 157714 79722 0 2 0 syz-executor 63819 157467 79722 0 2 0x4000000 syz-executor 39822 94960 29079 0 3 0x80 nanoslp syz-executor 39822 497590 29079 0 3 0x4000080 fsleep syz-executor 39822 449409 29079 0 3 0x4000080 fsleep syz-executor 39822 290882 29079 0 3 0x4000080 fsleep syz-executor 25547 170685 96459 0 3 0x80 nanoslp syz-executor 25547 165667 96459 0 3 0x4000080 ttyout syz-executor 25547 479035 96459 0 3 0x4000080 ttyout syz-executor 25547 183277 96459 0 3 0x4000080 fsleep syz-executor 25547 479236 96459 0 3 0x4000080 fsleep syz-executor 81248 418692 64995 0 3 0x80 nanoslp syz-executor 81248 422730 64995 0 3 0x4000080 kqsel syz-executor 81248 274103 64995 0 3 0x4000080 kqsel syz-executor 81248 271244 64995 0 3 0x4000080 fsleep syz-executor 81248 502179 64995 0 3 0x4000080 fsleep syz-executor 51613 249200 1 0 3 0x100083 ttyin getty *52062 59512 7207 0 7 0 syz-executor 52062 255013 7207 0 3 0x4000080 fsleep syz-executor 52062 346746 7207 0 3 0x4000080 fsleep syz-executor 7207 357779 97119 0 3 0x82 nanoslp syz-executor 79722 16061 97119 0 3 0x82 nanoslp syz-executor 64995 377592 97119 0 3 0x82 nanoslp syz-executor 51383 163884 97119 0 3 0x82 nanoslp syz-executor 13507 113042 97119 0 3 0x82 nanoslp syz-executor 96459 435879 97119 0 3 0x82 nanoslp syz-executor 29079 347091 97119 0 3 0x82 nanoslp syz-executor 2730 128126 97119 0 3 0x82 nanoslp syz-executor 97119 14666 27950 0 3 0x82 kqread syz-executor 27950 486036 85419 0 3 0x10008a sigsusp ksh 85419 352976 64175 0 3 0x98 kqread sshd-session 64175 21775 21721 0 3 0x92 kqread sshd-session 21721 315595 1 0 3 0x88 kqread sshd 8105 87378 88977 74 3 0x1100092 bpf pflogd 88977 117460 1 0 3 0x80 sbwait pflogd 7134 16347 10090 73 3 0x1100090 kqread syslogd 10090 254820 1 0 3 0x100082 sbwait syslogd 91925 407615 1 0 3 0x100080 kqread resolvd 7039 70797 75918 77 3 0x100092 kqread dhcpleased 38558 146982 75918 77 3 0x100092 kqread dhcpleased 75918 319960 1 0 3 0x80 kqread dhcpleased 46767 368541 0 0 3 0x14200 bored smr 95610 105676 0 0 2 0x14200 zerothread 65508 344670 0 0 3 0x14200 aiodoned aiodoned 58607 290851 0 0 3 0x14200 syncer update 16815 522904 0 0 3 0x14200 cleaner cleaner 42782 513539 0 0 7 0x14200 reaper 50239 268168 0 0 3 0x14200 pgdaemon pagedaemon 91688 265775 0 0 3 0x14200 bored viomb 33652 227834 0 0 3 0x40014200 acpi0 acpi0 47435 39189 0 0 3 0x40014200 idle1 42368 19830 0 0 3 0x14200 bored softnet1 77875 387601 0 0 3 0x14200 netlock softnet0 39293 479892 0 0 2 0x40014200 systqmp 31432 146588 0 0 3 0x14200 bored systq 64589 16503 0 0 3 0x14200 tmoslp softclockmp 91572 76529 0 0 3 0x40014200 tmoslp softclock 86693 493026 0 0 3 0x40014200 idle0 1 256601 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 56650 (syz-executor) thread 0xffff8000fffe62b8 (400327) exclusive rwlock vmmaplk r = 0 (0xfffffd8061d67ca8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 #7 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10252 11204K 11277K 166960K 11960 0 pcb 18 13K 14K 166960K 178 0 rtable 149 7K 9K 166960K 448 0 pf 38 18K 22K 166960K 112 0 ifaddr 32 4K 8K 166960K 79 0 ifgroup 63 2K 2K 166960K 127 0 sysctl 4 1K 9K 166960K 15 0 counters 72 37K 38K 166960K 136 0 ioctlops 0 0K 4K 166960K 1703 0 iov 0 0K 16K 166960K 44 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1371 86K 87K 166960K 2014 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 15 16K 16K 166960K 42 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 914 0 sigio 0 0K 0K 166960K 15 0 proc 72 115K 164K 166960K 621 0 subproc 72 4K 4K 166960K 75 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 114 0 in_multi 54 3K 7K 166960K 137 0 ether_multi 1 0K 0K 166960K 9 0 mrt 2 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 587 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 277 184K 190K 166960K 10424 0 UVM aobj 12 2K 2K 166960K 14 0 pinsyscall 43 86K 102K 166960K 2050 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 69 0 NDP 14 0K 1K 166960K 52 0 temp 80 8660K 8784K 166960K 39069 0 kqueue 13 20K 28K 166960K 183 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 120 117 0 113 2 1 1 2 0 8 0 rtentry 176 129 0 76 6 0 6 6 0 8 0 unpcb 144 699 0 678 7 6 1 6 0 8 0 syncache 336 10 0 10 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 354 0 349 11 7 4 7 0 8 3 arp 136 21 0 13 1 0 1 1 0 8 0 inpcb 328 924 0 911 11 7 4 7 0 8 2 nd6 152 25 0 12 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 25 0 25 2 2 0 1 0 8 0 pppxif 1504 2 0 2 1 1 0 1 0 8 0 pffrag 232 6 0 3 1 0 1 1 0 482 0 pffrnode 88 5 0 2 1 0 1 1 0 8 0 pffrent 40 10 0 7 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 78 0 28 1 0 1 1 0 8 0 pfstkey 128 78 0 28 2 0 2 2 0 8 0 pfstate 384 78 0 28 5 0 5 5 0 8 0 pfrule 1344 26 0 21 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 1 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 503 0 256 29 9 20 29 0 8 0 art_table 40 505 0 256 5 0 5 5 0 8 0 art_node 32 129 0 83 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 36 0 23 1 0 1 1 0 8 0 shmpl 112 11 0 2 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 3140 0 1633 95 0 95 95 0 8 0 ffsino 296 3140 0 1633 117 0 117 117 0 8 0 nchpl 144 4433 0 2731 64 0 64 64 0 8 0 rtmask 32 5 0 5 3 3 0 1 0 8 0 vnodes 216 3506 0 0 195 0 195 195 0 8 0 namei 1024 14949 0 14949 3 2 1 2 0 8 1 percpumem 16 83 0 32 1 0 1 1 0 8 0 kstatmem 264 78 0 44 3 0 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 16790 0 16790 10 9 1 8 1 8 1 plimitpl 152 221 0 204 1 0 1 1 0 8 0 sigapl 424 1214 0 1166 7 1 6 7 0 8 0 knotepl 120 809 0 0 25 0 25 25 0 8 0 kqueuepl 224 359 0 347 4 3 1 3 0 8 0 pipepl 344 181 0 154 3 0 3 3 0 8 0 fdescpl 528 1193 0 1161 3 0 3 3 0 8 0 filepl 160 7468 0 7239 27 13 14 21 0 8 4 lockfpl 104 302 0 300 1 0 1 1 0 8 0 lockfspl 48 122 0 120 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 81 0 64 1 0 1 1 0 8 0 ucredpl 104 1334 0 1319 1 0 1 1 0 8 0 zombiepl 144 1737 0 1735 1 0 1 1 0 8 0 processpl 1232 1214 0 1166 5 0 5 5 0 8 0 procpl 664 2697 0 2634 7 1 6 6 0 8 0 sosppl 176 7 0 7 2 2 0 1 0 8 0 sockpl 752 1831 0 1793 26 18 8 20 0 8 3 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 135 0 0 17 0 17 17 0 8 0 mcl2k 2048 58 0 0 6 0 6 6 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 2910 0 0 182 0 182 182 0 8 0 bufpl 280 5405 0 134 377 0 377 377 0 8 0 anonpl 32 9147 0 0 74 0 74 74 0 246 0 amapchunkpl 152 34575 0 33991 38 10 28 30 0 158 3 amappl16 200 3316 0 3280 26 21 5 15 0 8 0 amappl15 192 1 0 0 1 0 1 1 0 8 0 amappl14 184 11 0 11 1 1 0 1 0 8 0 amappl13 176 424 0 422 1 0 1 1 0 8 0 amappl12 168 1567 0 1524 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 68 0 54 1 0 1 1 0 8 0 amappl9 144 336 0 335 1 0 1 1 0 8 0 amappl8 136 33 0 30 1 0 1 1 0 8 0 amappl7 128 107 0 106 1 0 1 1 0 8 0 amappl6 120 278 0 265 1 0 1 1 0 8 0 amappl5 112 83 0 72 1 0 1 1 0 8 0 amappl4 104 455 0 426 1 0 1 1 0 8 0 amappl3 96 6040 0 5930 4 1 3 3 0 8 0 amappl2 88 1343 0 1265 2 0 2 2 0 8 0 amappl1 80 13634 0 13037 15 1 14 14 0 8 0 amappl 88 9520 0 9324 5 0 5 5 0 92 0 uvmvnodes 80 3506 0 0 72 0 72 72 0 8 0 dma65536 65536 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 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 73 0 73 3 3 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 13 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1193 0 1161 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1193 0 1161 1 0 1 1 0 8 0 vmmpekpl 168 11975 0 11938 3 0 3 3 0 8 0 vmmpepl 168 83368 0 81339 112 19 93 105 0 357 2 vmsppl 488 1192 0 1161 8 3 5 5 0 8 0 rwobjpl 80 28233 0 23739 93 1 92 92 0 8 0 pdppl 4096 2393 0 2322 108 35 73 83 0 8 2 pvpl 32 16365 0 0 133 1 132 132 0 265 0 pmappl 256 1192 0 1161 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 471 0 60 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83823ff0) 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(ffffffff838b2cf0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b2cf0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80002a244280,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff838b2cf0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b2cf0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc reaper(ffff8000ffffdc90) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff83823ff0) 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(ffffffff838b2cf0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b2cf0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80002a244280,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff838b2cf0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b2cf0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc reaper(ffff8000ffffdc90) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -12 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: 0x7e2b3da4f450, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7e2b3da4f450, count: -1