uvm_fault(0xfffffd800b063d58, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff828749c8 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff80002a2e8570 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff828749c8 Starting stack trace... panic(ffffffff833e7315) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a2e84c0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000168b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,1,2000,ffff80003a804d40) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,1,2000,ffff80003a804d40) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2e8670) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80723f81f0,1,fffffd80097fd3a8,ffff80003a804d40) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80645072f8,ffff80003a804d40) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80645072f8,ffff80003a804d40) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80645072f8,ffff80003a804d40) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80645072f8,ffff80003a804d40) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003a804d40) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003a804d40,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003a804d40,ffff80002a2e89e0,ffff80002a2e8930) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2e89e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2e89e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7eab4f5cad10, 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 *500115 64882 0 0 0x4000000 1 syz-executor 505300 56673 0 0x2 0x1 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x86a7378bc00, 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(0xfffffd800b063d58, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x86a7378bc00, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3160e0 rbx 0 rdx 0 rcx 0xffff800036bdd790 rax 0x2a r8 0xffff80002a316010 r9 0x1 r10 0x5652b96be127b443 r11 0xd390ed0c214a79e r12 0 r13 0 r14 0 r15 0 rip 0xffffffff823204c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a316060 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=500115 pid=64882 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800036bdc800,0xffffffff83945270 process=0xffff800036be3040 user=0xffff80002a311000, vmspace=0xfffffd800b063b70 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 64882 515028 24357 0 3 0 kmmaplk syz-executor *64882 500115 24357 0 7 0x4000000 syz-executor 79725 11326 41297 0 2 0xc80 syz-executor 79725 173649 41297 0 3 0x4000080 dtread syz-executor 79725 505210 41297 0 3 0x4000080 fsleep syz-executor 411 268639 15239 0 2 0 syz-executor 411 347212 15239 0 3 0x4000080 fsleep syz-executor 79064 140154 41701 0 2 0 syz-executor 79064 378656 41701 0 2 0x4000c80 syz-executor 58293 160851 96006 0 4 0x82000 syz-executor 58293 410599 96006 0 2 0x4082000 syz-executor 58293 101023 96006 0 2 0x4082c00 syz-executor 58293 438814 96006 0 4 0x4082000 syz-executor 58293 440001 96006 0 3 0x4002000 suspend syz-executor 41701 378682 93394 0 2 0xc82 syz-executor 30181 15917 0 0 3 0x14200 acct acct 15239 468009 93394 0 2 0x3 syz-executor 48045 484920 1 0 2 0x100083 getty 34329 15500 93394 0 2 0xc82 syz-executor 15743 5939 93394 0 2 0x2 syz-executor 96006 111092 93394 0 3 0x82 wait syz-executor 24357 495391 93394 0 2 0xc82 syz-executor 41297 495753 93394 0 2 0xc82 syz-executor 56673 505300 93394 0 7 0x3 syz-executor 93394 26316 71975 0 3 0x82 kqread syz-executor 71975 222788 86008 0 3 0x10008a sigsusp ksh 86008 358490 89873 0 3 0x98 kqread sshd-session 89873 74003 16157 0 3 0x92 kqread sshd-session 16157 351180 1 0 3 0x88 kqread sshd 4894 151879 62771 74 3 0x1100092 bpf pflogd 62771 505935 1 0 3 0x80 sbwait pflogd 40707 428506 47910 73 3 0x1100090 kqread syslogd 47910 88146 1 0 3 0x100082 sbwait syslogd 77852 98999 1 0 3 0x100080 kqread resolvd 44330 290169 96442 77 3 0x100092 kqread dhcpleased 29425 363446 96442 77 3 0x100092 kqread dhcpleased 96442 221903 1 0 3 0x80 kqread dhcpleased 81078 298647 0 0 2 0x14200 smr 99592 15597 0 0 3 0x14200 pgzero zerothread 85775 304630 0 0 3 0x14200 aiodoned aiodoned 50030 117435 0 0 3 0x14200 syncer update 33496 430236 0 0 3 0x14200 cleaner cleaner 60362 115784 0 0 2 0x14200 reaper 73920 336900 0 0 3 0x14200 pgdaemon pagedaemon 83605 108471 0 0 3 0x14200 bored viomb 95678 393905 0 0 3 0x40014200 acpi0 acpi0 36927 118784 0 0 3 0x40014200 idle1 65181 501849 0 0 3 0x14200 bored softnet1 94174 307704 0 0 2 0x14200 softnet0 54734 322202 0 0 2 0x14200 systqmp 72237 452655 0 0 3 0x14200 bored systq 74225 262841 0 0 2 0x14200 softclockmp 57173 35504 0 0 3 0x40014200 tmoslp softclock 88416 21550 0 0 3 0x40014200 idle0 1 75047 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 58293 (syz-executor) thread 0xffff800036bdcfc8 (410599) exclusive rrwlock inode r = 0 (0xfffffd806e80c910) #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_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 60362 (reaper) thread 0xffff8000ffffdc90 (115784) exclusive rwlock kmmaplk r = 0 (0xffffffff839b57b0) #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_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5165 #3 uvm_unmap+0x7d sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:714 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1ca sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11132 12326K 12472K 166960K 16057 0 pcb 17 20K 25K 166960K 983 0 rtable 285 16K 17K 166960K 969 0 pf 46 20K 24K 166960K 712 0 ifaddr 41 8K 9K 166960K 269 0 ifgroup 57 2K 3K 166960K 497 0 sysctl 4 1K 9K 166960K 41 0 counters 72 37K 38K 166960K 500 0 ioctlops 0 0K 8K 166960K 2712 0 iov 0 0K 30K 166960K 229 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1494 94K 94K 166960K 4322 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 13K 166960K 42 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 249 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 2924 0 sigio 0 0K 0K 166960K 51 0 proc 74 115K 180K 166960K 1054 0 subproc 72 4K 4K 166960K 145 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 378 0 in_multi 87 6K 6K 166960K 344 0 ether_multi 1 0K 0K 166960K 34 0 mrt 1 0K 0K 166960K 23 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 993 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 9 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 257 171K 182K 166960K 27798 0 UVM aobj 58 20K 22K 166960K 85 0 pinsyscall 43 86K 104K 166960K 4276 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 279 0 NDP 13 0K 1K 166960K 202 0 temp 83 8684K 8940K 166960K 158518 0 kqueue 14 22K 32K 166960K 590 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 120 403 0 400 5 4 1 3 0 8 0 rtentry 176 304 0 200 5 0 5 5 0 8 0 unpcb 144 1967 0 1947 21 17 4 6 0 8 3 syncache 336 5 0 5 3 3 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 1311 0 1303 39 37 2 13 0 8 0 arp 136 53 0 32 1 0 1 1 0 8 0 inpcb 328 4346 0 4333 55 48 7 18 0 8 5 nd6 152 60 0 34 1 0 1 1 0 8 0 pkpcb 40 27 0 27 8 8 0 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 3 0 1 0 8 0 ppxss 1192 161 0 160 6 5 1 1 0 8 0 pppxif 1504 27 0 27 11 10 1 1 0 8 1 pfstscr 40 5 0 4 2 1 1 1 0 8 0 pffrag 232 31 0 25 1 0 1 1 0 482 0 pffrnode 88 22 0 18 1 0 1 1 0 8 0 pffrent 40 64 0 58 2 1 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 7 0 3 1 0 1 1 0 8 0 pfanchor 1288 5 0 2 1 0 1 1 0 8 0 pftag 88 5 0 3 1 0 1 1 0 8 0 pfstitem 24 6 0 1 1 0 1 1 0 8 0 pfstkey 128 21 0 16 2 1 1 1 0 8 0 pfstate 448 11 0 8 2 1 1 1 0 8 0 pfrule 1360 100 0 93 2 1 1 1 0 8 0 rttmr 136 5 0 5 5 4 1 1 0 8 1 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1482 0 1005 50 19 31 31 0 8 0 art_table 40 1487 0 1005 5 0 5 5 0 8 0 art_node 32 301 0 209 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 240 0 230 1 0 1 1 0 8 0 shmpl 112 51 0 5 2 0 2 2 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 7274 0 5751 96 0 96 96 0 8 0 ffsino 296 7274 0 5751 118 0 118 118 0 8 0 nchpl 144 11265 0 9533 65 0 65 65 0 8 0 rtmask 32 20 0 20 6 6 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 42342 0 42342 6 5 1 2 0 8 1 percpumem 16 265 0 214 1 0 1 1 0 8 0 vcpupl 3968 10 0 1 2 0 2 2 0 8 0 vmpool 848 29 0 20 4 3 1 2 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 326 0 296 8 5 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 23 0 23 8 7 1 1 0 8 1 scxspl 216 77671 0 77671 13 12 1 8 1 8 1 plimitpl 152 679 0 661 1 0 1 1 0 8 0 sigapl 424 3258 0 3209 9 2 7 8 0 8 0 knotepl 120 657 0 0 19 0 19 19 0 8 0 kqueuepl 224 1217 0 1207 15 14 1 3 0 8 0 pipepl 344 810 0 782 23 20 3 11 0 8 0 fdescpl 528 3205 0 3173 3 0 3 3 0 8 0 filepl 160 25442 0 25218 50 35 15 21 0 8 2 lockfpl 104 1061 0 1059 2 1 1 2 0 8 0 lockfspl 48 409 0 407 1 0 1 1 0 8 0 sessionpl 144 35 0 26 1 0 1 1 0 8 0 pgrppl 48 118 0 101 1 0 1 1 0 8 0 ucredpl 104 4533 0 4520 1 0 1 1 0 8 0 zombiepl 144 4133 0 4131 2 1 1 1 0 8 0 processpl 1232 3258 0 3209 8 4 4 6 0 8 0 procpl 664 7689 0 7630 10 3 7 8 0 8 0 sosppl 176 24 0 24 8 7 1 1 0 8 1 sockpl 752 6980 0 6944 94 80 14 24 0 8 8 mcl64k 65536 4 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 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 46 0 0 6 0 6 6 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 1818 0 0 113 0 113 113 0 8 0 bufpl 280 32243 0 26106 439 0 439 439 0 8 0 anonpl 32 15732 0 0 126 0 126 126 0 246 0 amapchunkpl 152 96408 0 95864 64 34 30 34 0 158 3 amappl16 200 12088 0 11920 117 102 15 39 0 8 6 amappl15 192 10 0 9 1 0 1 1 0 8 0 amappl14 184 36 0 35 1 0 1 1 0 8 0 amappl13 176 521 0 520 1 0 1 1 0 8 0 amappl12 168 3621 0 3579 3 0 3 3 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 63 0 49 1 0 1 1 0 8 0 amappl9 144 279 0 279 1 1 0 1 0 8 0 amappl8 136 54 0 51 1 0 1 1 0 8 0 amappl7 128 113 0 111 1 0 1 1 0 8 0 amappl6 120 386 0 372 1 0 1 1 0 8 0 amappl5 112 94 0 82 1 0 1 1 0 8 0 amappl4 104 479 0 450 1 0 1 1 0 8 0 amappl3 96 17348 0 17248 4 1 3 3 0 8 0 amappl2 88 3301 0 3221 2 0 2 2 0 8 0 amappl1 80 20887 0 20295 15 2 13 15 0 8 0 amappl 88 26448 0 26271 5 0 5 5 0 92 0 uvmvnodes 80 193 0 0 4 0 4 4 0 8 0 dma65536 65536 2 0 2 2 2 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 9 0 9 4 4 0 1 0 8 0 dma128 128 260 0 260 4 4 0 1 0 8 0 dma64 64 11 0 11 4 3 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 84 0 27 2 0 2 2 0 8 0 uaddrrnd 24 3204 0 3173 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3204 0 3173 1 0 1 1 0 8 0 vmmpekpl 168 27004 0 26944 4 0 4 4 0 8 0 vmmpepl 168 204541 0 202440 147 37 110 117 0 357 8 vmsppl 488 3203 0 3173 6 1 5 5 0 8 0 rwobjpl 80 53613 0 52270 47 13 34 39 0 8 0 pdppl 4096 6473 0 6395 143 63 80 83 0 8 2 pvpl 32 22492 0 0 181 0 181 181 0 265 0 pmappl 256 3232 0 3193 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 503 0 142 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838b7ff0) 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(ffffffff83975900) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83975900) at __mp_lock+0x199 sys/kern/kern_lock.c:173 ktrsysret(ffff8000ffffd9f8,5b,0,ffff80002a3421e0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffffd9f8,5b,0,ffff80002a3421e0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a342290) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a342290) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:796 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b57b13ac9a0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff838b7ff0) 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(ffffffff83975900) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83975900) at __mp_lock+0x199 sys/kern/kern_lock.c:173 ktrsysret(ffff8000ffffd9f8,5b,0,ffff80002a3421e0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffffd9f8,5b,0,ffff80002a3421e0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a342290) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a342290) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:796 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b57b13ac9a0, count: -7 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: 0x86a7378bc00, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x86a7378bc00, count: -1