uvm_fault(0xfffffd8074c00d70, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81c58b78 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002f3c2750 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81c58b78 Starting stack trace... panic(ffffffff833e167f) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002f3c26a0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000162e000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80002a342fc8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a342fc8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002f3c2850) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805dd37368,81,fffffd80097fd6e8,ffff80002a342fc8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c88b7b8,ffff80002a342fc8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c88b7b8,ffff80002a342fc8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c88b7b8,ffff80002a342fc8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c88b7b8,ffff80002a342fc8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a342fc8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a342fc8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a342fc8,ffff80002f3c2bc0,ffff80002f3c2b10) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f3c2bc0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f3c2bc0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fb2c0f78070, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 11 -1 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *309853 51736 0 0x2 0 1 syz-executor 125783 78588 0 0x14000 0x200 0 reaper savectx() at savectx+0xae end of kernel end trace frame: 0x797310bcb8d0, 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(0xfffffd8074c00d70, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x797310bcb8d0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a326d20 rbx 0 rdx 0 rcx 0xffff80002a343260 rax 0x33 r8 0xffff80002a326c50 r9 0x1 r10 0xd53a9ecd124eeca r11 0xa96b8a52a5571ab4 r12 0 r13 0 r14 0xffff80002a343260 r15 0 rip 0xffffffff832353ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a326ca0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=309853 pid=51736 tcnt=1 stat=onproc flags process=2 proc=0 runpri=76, usrpri=77, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c418028,0xffff80002a260d20 process=0xffff80003c055d08 user=0xffff80002a321000, vmspace=0xfffffd806a9927c8 estcpu=27, cpticks=43, pctcpu=0.24, user=1, sys=27, intr=14 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16678 454953 80963 0 2 0 syz-executor 16678 276122 80963 0 3 0x4000080 sbwait syz-executor 16678 79226 80963 0 3 0x4000080 fsleep syz-executor 92181 13706 26787 0 3 0x80 nanoslp syz-executor 92181 342072 26787 0 3 0x4000080 kqsel syz-executor 92181 200339 26787 0 3 0x4000080 fsleep syz-executor 5344 354299 77681 0 3 0x80 nanoslp syz-executor 5344 456152 77681 0 3 0x4000080 ttyin syz-executor 5344 459254 77681 0 3 0x4000080 fsleep syz-executor 98619 131214 0 0 3 0x14200 acct acct *51736 309853 64497 0 7 0x2 syz-executor 83044 301297 64497 0 3 0x82 nanoslp syz-executor 41568 449081 0 0 3 0x14280 nfsidl nfsio 92495 326276 0 0 3 0x14280 nfsidl nfsio 69852 87455 0 0 3 0x14280 nfsidl nfsio 85187 216772 0 0 3 0x14280 nfsidl nfsio 55713 512710 0 0 3 0x14280 nfsidl nfsio 64110 284447 0 0 3 0x14280 nfsidl nfsio 90548 200927 0 0 3 0x14280 nfsidl nfsio 60159 54762 0 0 3 0x14280 nfsidl nfsio 16766 8175 0 0 3 0x14280 nfsidl nfsio 60586 181714 0 0 3 0x14280 nfsidl nfsio 74721 25587 0 0 3 0x14280 nfsidl nfsio 93401 421233 0 0 3 0x14280 nfsidl nfsio 74791 367125 0 0 3 0x14280 nfsidl nfsio 17617 110237 0 0 3 0x14280 nfsidl nfsio 51005 486316 0 0 3 0x14280 nfsidl nfsio 16768 393478 0 0 3 0x14280 nfsidl nfsio 4853 62182 0 0 3 0x14280 nfsidl nfsio 6461 17245 0 0 3 0x14280 nfsidl nfsio 56068 166434 0 0 3 0x14280 nfsidl nfsio 87324 241693 0 0 3 0x14280 nfsidl nfsio 77681 226870 64497 0 3 0x82 nanoslp syz-executor 6149 455979 64497 0 3 0x82 nanoslp syz-executor 26787 488897 64497 0 3 0x82 nanoslp syz-executor 84586 328893 64497 0 3 0x82 nanoslp syz-executor 80963 320705 64497 0 3 0x82 nanoslp syz-executor 27030 26562 64497 0 3 0x82 nanoslp syz-executor 64497 193321 96833 0 3 0x82 kqread syz-executor 96833 522102 83347 0 3 0x10008a sigsusp ksh 83347 289751 30310 0 3 0x98 kqread sshd-session 30310 356196 99309 0 3 0x92 kqread sshd-session 71173 501153 1 0 3 0x100083 ttyin getty 99309 445491 1 0 3 0x88 kqread sshd 19042 523240 49964 74 3 0x1100092 bpf pflogd 49964 244994 1 0 3 0x80 sbwait pflogd 96792 10969 27063 73 3 0x1100090 kqread syslogd 27063 270438 1 0 3 0x100082 sbwait syslogd 72202 136009 1 0 3 0x100080 kqread resolvd 66817 285854 42373 77 3 0x100092 kqread dhcpleased 94935 176160 42373 77 3 0x100092 kqread dhcpleased 42373 338027 1 0 3 0x80 kqread dhcpleased 62283 240492 0 0 3 0x14200 bored smr 47922 19261 0 0 2 0x14200 zerothread 21929 272299 0 0 3 0x14200 aiodoned aiodoned 43170 54285 0 0 3 0x14200 syncer update 37100 280125 0 0 3 0x14200 cleaner cleaner 78588 125783 0 0 7 0x14200 reaper 39536 357026 0 0 3 0x14200 pgdaemon pagedaemon 2218 450444 0 0 3 0x14200 bored viomb 19431 251782 0 0 3 0x40014200 acpi0 acpi0 74248 240861 0 0 3 0x40014200 idle1 9130 258651 0 0 3 0x14200 bored softnet1 98798 489505 0 0 3 0x14200 bored softnet0 78091 37993 0 0 2 0x40014200 systqmp 9249 250124 0 0 3 0x14200 bored systq 71621 336797 0 0 3 0x14200 tmoslp softclockmp 51952 271433 0 0 3 0x40014200 tmoslp softclock 22049 512431 0 0 3 0x40014200 idle0 1 276491 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11099 12236K 12329K 166960K 13251 0 pcb 18 15K 17K 166960K 451 0 rtable 220 10K 11K 166960K 864 0 pf 38 18K 80K 166960K 245 0 ifaddr 40 7K 8K 166960K 162 0 ifgroup 60 2K 2K 166960K 261 0 sysctl 4 1K 9K 166960K 49 0 counters 74 37K 38K 166960K 278 0 ioctlops 0 0K 4K 166960K 1850 0 iov 0 0K 24K 166960K 147 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1388 87K 87K 166960K 2561 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 180 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 110K 166960K 1750 0 sigio 1 0K 0K 166960K 162 0 proc 72 115K 164K 166960K 933 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 194 0 in_multi 79 5K 7K 166960K 271 0 ether_multi 1 0K 0K 166960K 22 0 mrt 4 0K 0K 166960K 19 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 921 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 259 152K 171K 166960K 17494 0 UVM aobj 21 22K 22K 166960K 26 0 pinsyscall 42 84K 108K 166960K 3085 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 261 0 NDP 13 0K 2K 166960K 113 0 temp 81 8684K 8760K 166960K 99355 0 kqueue 13 20K 32K 166960K 320 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 120 283 0 279 5 4 1 3 0 8 0 rtentry 176 261 0 174 6 1 5 6 0 8 0 unpcb 144 857 0 833 3 1 2 2 0 8 1 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpqe 32 56 0 56 1 0 1 1 0 8 1 tcpcb 736 501 0 495 10 8 2 4 0 8 1 arp 136 45 0 26 1 0 1 1 0 8 0 inpcb 328 1991 0 1980 24 17 7 10 0 8 6 nd6 152 52 0 32 1 0 1 1 0 8 0 pkpcb 40 15 0 15 3 2 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1192 76 0 75 2 1 1 1 0 8 0 pppxif 1504 8 0 7 3 2 1 1 0 8 0 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 18 0 5 1 0 1 1 0 482 0 pffrnode 88 14 0 2 1 0 1 1 0 8 0 pffrent 40 25 0 11 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 10 0 10 3 2 1 1 0 8 1 pfanchor 1288 6 0 5 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 2 1 0 1 1 0 8 0 pfstate 448 2 0 1 1 0 1 1 0 8 0 pfrule 1360 16 0 12 1 0 1 1 0 8 0 rttmr 136 5 0 5 2 1 1 1 0 8 1 art_heap8 4096 9 0 5 7 3 4 5 0 8 0 art_heap4 256 1129 0 751 37 8 29 29 0 8 2 art_table 40 1138 0 756 5 0 5 5 0 8 0 art_node 32 261 0 183 1 0 1 1 0 8 0 sysvmsgpl 40 24 0 14 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 175 0 165 1 0 1 1 0 8 0 shmpl 112 11 0 3 1 0 1 1 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 4618 0 3095 96 0 96 96 0 8 0 ffsino 296 4618 0 3095 118 0 118 118 0 8 0 nchpl 144 6993 0 5263 65 0 65 65 0 8 0 rtmask 32 19 0 19 4 3 1 1 0 8 1 vnodes 216 5195 0 0 289 0 289 289 0 8 0 namei 1024 25124 0 25124 3 2 1 2 0 8 1 percpumem 16 154 0 102 1 0 1 1 0 8 0 vcpupl 3968 10 0 0 2 0 2 2 0 8 0 vmpool 848 12 0 2 2 0 2 2 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 162 0 132 4 1 3 3 0 8 0 scsiplug 72 13 0 13 5 4 1 1 0 8 1 scxspl 216 35486 0 35486 13 11 2 8 1 8 2 plimitpl 152 576 0 558 1 0 1 1 0 8 0 sigapl 424 2060 0 1991 9 1 8 8 0 8 0 knotepl 120 760 0 0 23 0 23 23 0 8 0 kqueuepl 224 673 0 662 8 3 5 5 0 8 4 pipepl 344 295 0 266 3 0 3 3 0 8 0 fdescpl 528 2021 0 1990 3 0 3 3 0 8 0 filepl 160 12919 0 12677 24 10 14 17 0 8 1 lockfpl 104 762 0 760 4 2 2 2 0 8 1 lockfspl 48 249 0 247 1 0 1 1 0 8 0 sessionpl 144 32 0 23 1 0 1 1 0 8 0 pgrppl 48 75 0 58 1 0 1 1 0 8 0 ucredpl 104 2343 0 2329 1 0 1 1 0 8 0 zombiepl 144 2129 0 2124 2 1 1 1 0 8 0 processpl 1232 2060 0 1991 6 0 6 6 0 8 0 procpl 664 4669 0 4591 8 0 8 8 0 8 0 sosppl 176 8 0 8 3 2 1 1 0 8 1 sockpl 752 3193 0 3153 31 20 11 14 0 8 6 mcl64k 65536 4 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 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 122 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 67 0 0 8 0 8 8 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 415 0 0 25 0 25 25 0 8 0 bufpl 280 14415 0 8279 439 0 439 439 0 8 0 anonpl 32 10391 0 0 84 0 84 84 0 246 0 amapchunkpl 152 65718 0 65105 53 22 31 37 0 158 1 amappl16 200 5932 0 5884 44 31 13 21 0 8 6 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 6 0 6 2 2 0 1 0 8 0 amappl13 176 533 0 532 1 0 1 1 0 8 0 amappl12 168 2431 0 2389 3 0 3 3 0 8 0 amappl11 160 26 0 26 1 1 0 1 0 8 0 amappl10 152 50 0 36 1 0 1 1 0 8 0 amappl9 144 244 0 243 1 0 1 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 117 0 116 1 0 1 1 0 8 0 amappl6 120 379 0 365 1 0 1 1 0 8 0 amappl5 112 117 0 105 1 0 1 1 0 8 0 amappl4 104 471 0 441 1 0 1 1 0 8 0 amappl3 96 10368 0 10271 4 1 3 3 0 8 0 amappl2 88 2123 0 2045 2 0 2 2 0 8 0 amappl1 80 16752 0 16164 16 2 14 15 0 8 0 amappl 88 16372 0 16188 5 0 5 5 0 92 0 uvmvnodes 80 165 0 0 4 0 4 4 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 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 0 1 1 0 8 1 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 255 0 255 2 1 1 1 0 8 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 25 0 5 1 0 1 1 0 8 0 uaddrrnd 24 2021 0 1990 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2021 0 1990 1 0 1 1 0 8 0 vmmpekpl 168 16924 0 16866 3 0 3 3 0 8 0 vmmpepl 168 133166 0 131199 118 21 97 104 0 357 5 vmsppl 488 2020 0 1989 6 1 5 5 0 8 0 rwobjpl 80 35458 0 34314 31 3 28 30 0 8 0 pdppl 4096 4073 0 3992 120 39 81 85 0 8 0 pvpl 32 19446 0 0 157 0 157 157 0 265 0 pmappl 256 2032 0 1991 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 341 0 67 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83854ff0) 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 uvm_pmr_size_RBT_COMPARE(fffffd80081734d8,fffffd80091a3cf0) at uvm_pmr_size_RBT_COMPARE+0x3c uvm_pmr_size_cmp sys/uvm/uvm_pmemrange.c:249 [inline] uvm_pmr_size_RBT_COMPARE(fffffd80081734d8,fffffd80091a3cf0) at uvm_pmr_size_RBT_COMPARE+0x3c sys/uvm/uvm_pmemrange.c:112 _rb_insert(ffffffff8366f0a0,fffffd800479d008,fffffd80081734d8) at _rb_insert+0x7b sys/kern/subr_tree.c:414 uvm_pmr_remove_1strange(ffff80002a234dc8,0,0,0) at uvm_pmr_remove_1strange+0x8e3 sys/uvm/uvm_pmemrange.h:-1 uvm_pmr_freepageq(ffff80002a234dc8) at uvm_pmr_freepageq+0x1b4 sys/uvm/uvm_pmemrange.c:1386 km_free(ffff80003b3f9000,6000,ffffffff836acc68,ffffffff836a29a8) at km_free+0x36b sys/uvm/uvm_km.c:710 uvm_uarea_free(ffff80002a3422d0) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 reaper(ffff8000ffffdc90) at reaper+0x1ca sys/kern/kern_exit.c:493 end trace frame: 0x0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff83854ff0) 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 uvm_pmr_size_RBT_COMPARE(fffffd80081734d8,fffffd80091a3cf0) at uvm_pmr_size_RBT_COMPARE+0x3c uvm_pmr_size_cmp sys/uvm/uvm_pmemrange.c:249 [inline] uvm_pmr_size_RBT_COMPARE(fffffd80081734d8,fffffd80091a3cf0) at uvm_pmr_size_RBT_COMPARE+0x3c sys/uvm/uvm_pmemrange.c:112 _rb_insert(ffffffff8366f0a0,fffffd800479d008,fffffd80081734d8) at _rb_insert+0x7b sys/kern/subr_tree.c:414 uvm_pmr_remove_1strange(ffff80002a234dc8,0,0,0) at uvm_pmr_remove_1strange+0x8e3 sys/uvm/uvm_pmemrange.h:-1 uvm_pmr_freepageq(ffff80002a234dc8) at uvm_pmr_freepageq+0x1b4 sys/uvm/uvm_pmemrange.c:1386 km_free(ffff80003b3f9000,6000,ffffffff836acc68,ffffffff836a29a8) at km_free+0x36b sys/uvm/uvm_km.c:710 uvm_uarea_free(ffff80002a3422d0) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 reaper(ffff8000ffffdc90) at reaper+0x1ca sys/kern/kern_exit.c:493 end trace frame: 0x0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x797310bcb8d0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x797310bcb8d0, count: -1