uvm_fault(0xfffffd806ef5c5c0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff816cfc48 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff8000333f6fc0 gsbase 0xffff8000299fdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff816cfc48 Starting stack trace... panic(ffffffff833a0373) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000333f6f10) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001476000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,1,2000,ffff80003c437a18) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003c437a18) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000333f70c0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c59aaf8,1,fffffd80097fb548,ffff80003c437a18) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805edf5d78,ffff80003c437a18) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805edf5d78,ffff80003c437a18) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805edf5d78,ffff80003c437a18) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805edf5d78,ffff80003c437a18) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c437a18) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c437a18,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c437a18,ffff8000333f7430,ffff8000333f7380) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000333f7430) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000333f7430) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x706123fc5190, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 416574632 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 281266 89261 0 0 0 0 syz-executor *153650 77419 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x73da18d46c90, 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(0xfffffd806ef5c5c0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x73da18d46c90, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800033bfd8c0 rbx 0 rdx 0 rcx 0xffff80003c4362c0 rax 0x3a r8 0xffff800033bfd7f0 r9 0x1 r10 0xd0f497f49a667023 r11 0xa83da7cb193c5b15 r12 0 r13 0 r14 0xffff80003c4362c0 r15 0 rip 0xffffffff818933ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff800033bfd840 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=153650 pid=77419 tcnt=1 stat=onproc flags process=2 proc=0 runpri=82, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffef240,0xffff8000fffee7f0 process=0xffff8000348004f0 user=0xffff800033bf8000, vmspace=0xfffffd806ae15b90 estcpu=32, cpticks=181, pctcpu=0.71, user=1, sys=158, intr=21 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69853 251812 79788 0 2 0 syz-executor 89261 281266 12874 0 7 0 syz-executor 89261 13749 12874 0 3 0x4000080 fsleep syz-executor 49110 346822 13782 0 2 0 syz-executor 49110 249292 13782 0 3 0x4000080 fsleep syz-executor 7616 303685 19244 0 2 0 syz-executor 7616 362784 19244 0 3 0x4000080 lockf syz-executor 41607 133412 77419 0 3 0x80 nanoslp syz-executor 41607 219122 77419 0 3 0x4000080 bell syz-executor 41607 166100 77419 0 3 0x4000080 fsleep syz-executor 98698 199376 32038 0 3 0x80 nanoslp syz-executor 98698 294358 32038 0 3 0x4000080 sbwait syz-executor 98698 99057 32038 0 3 0x4000080 fsleep syz-executor 98698 469301 32038 0 3 0x4000080 fsleep syz-executor 79788 162568 63798 0 3 0x82 nanoslp syz-executor 73049 190579 0 0 3 0x14200 bored sosplice 64249 329097 63798 0 3 0x82 nanoslp syz-executor *77419 153650 63798 0 7 0x2 syz-executor 19244 112966 63798 0 3 0x82 nanoslp syz-executor 12874 56178 63798 0 3 0x82 nanoslp syz-executor 13782 119162 63798 0 3 0x82 nanoslp syz-executor 1658 503988 63798 0 3 0x82 nanoslp syz-executor 32038 234356 63798 0 3 0x82 nanoslp syz-executor 63798 291196 77097 0 3 0x82 kqread syz-executor 77097 400564 30409 0 3 0x10008a sigsusp ksh 30409 79276 13343 0 3 0x98 kqread sshd-session 13343 313710 39389 0 3 0x92 kqread sshd-session 10292 242160 1 0 3 0x100083 ttyin getty 39389 64466 1 0 3 0x88 kqread sshd 78750 54988 79604 74 3 0x1100092 bpf pflogd 79604 31528 1 0 3 0x80 sbwait pflogd 88446 356807 86257 73 3 0x1100090 kqread syslogd 86257 254591 1 0 3 0x100082 sbwait syslogd 74525 372026 1 0 3 0x100080 kqread resolvd 71709 249759 23533 77 3 0x100092 kqread dhcpleased 34183 245475 23533 77 3 0x100092 kqread dhcpleased 23533 25175 1 0 3 0x80 kqread dhcpleased 40346 391171 0 0 3 0x14200 bored smr 38922 419038 0 0 2 0x14200 zerothread 4876 478400 0 0 3 0x14200 aiodoned aiodoned 83240 164404 0 0 3 0x14200 syncer update 65656 469603 0 0 3 0x14200 cleaner cleaner 33961 447217 0 0 3 0x14200 reaper reaper 46307 515887 0 0 3 0x14200 pgdaemon pagedaemon 94216 218392 0 0 3 0x14200 bored viomb 75774 455724 0 0 3 0x40014200 acpi0 acpi0 134 456014 0 0 3 0x40014200 idle1 8417 504431 0 0 3 0x14200 bored softnet1 80495 98922 0 0 3 0x14200 netlock softnet0 93263 203086 0 0 2 0x40014200 systqmp 43342 63833 0 0 3 0x14200 bored systq 5380 189701 0 0 3 0x14200 tmoslp softclockmp 56878 111781 0 0 3 0x40014200 tmoslp softclock 90564 378599 0 0 3 0x40014200 idle0 1 177053 0 0 3 0x82 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 10243 11130K 11362K 166960K 12423 0 pcb 18 12K 12K 166960K 142 0 rtable 175 9K 9K 166960K 449 0 pf 35 17K 81K 166960K 149 0 ifaddr 30 4K 7K 166960K 95 0 ifgroup 49 2K 2K 166960K 159 0 sysctl 3 1K 9K 166960K 10 0 counters 68 36K 37K 166960K 178 0 ioctlops 0 0K 4K 166960K 1782 0 iov 0 0K 16K 166960K 123 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1420 89K 89K 166960K 2146 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 127 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 1021 0 sigio 0 0K 0K 166960K 285 0 proc 72 115K 164K 166960K 705 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 132 0 in_multi 55 4K 7K 166960K 159 0 ether_multi 1 0K 0K 166960K 4 0 mrt 2 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 663 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 244 167K 189K 166960K 11036 0 UVM aobj 30 2K 2K 166960K 34 0 pinsyscall 43 86K 102K 166960K 2242 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 62 0 NDP 11 0K 2K 166960K 68 0 temp 78 8652K 8718K 166960K 42010 0 kqueue 13 20K 28K 166960K 200 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 120 171 0 168 3 0 3 3 0 8 2 rtentry 176 147 0 81 5 0 5 5 0 8 0 unpcb 144 1036 0 1016 11 4 7 7 0 8 5 syncache 336 10 0 10 3 2 1 1 0 8 1 tcpqe 32 5 0 5 2 2 0 1 0 8 0 tcpcb 736 233 0 225 3 1 2 2 0 8 1 arp 136 20 0 10 1 0 1 1 0 8 0 inpcb 328 1156 0 1144 17 11 6 12 0 8 4 nd6 144 26 0 16 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 41 0 39 2 1 1 1 0 8 0 pppxif 1504 3 0 3 2 1 1 1 0 8 1 pffrag 232 9 0 3 1 0 1 1 0 482 0 pffrnode 88 9 0 3 1 0 1 1 0 8 0 pffrent 40 51 0 45 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 2 0 2 2 1 1 1 0 8 1 pfstitem 24 60 0 18 1 0 1 1 0 8 0 pfstkey 128 60 0 18 2 0 2 2 0 8 0 pfstate 384 58 0 18 4 0 4 4 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 3 0 0 3 0 3 3 0 8 0 art_heap4 256 688 0 412 30 10 20 30 0 8 1 art_table 40 691 0 412 5 0 5 5 0 8 0 art_node 32 145 0 87 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 123 0 113 1 0 1 1 0 8 0 shmpl 112 31 0 4 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3219 0 1712 96 0 96 96 0 8 0 ffsino 296 3219 0 1712 118 0 118 118 0 8 0 nchpl 144 4595 0 2895 64 0 64 64 0 8 0 rtmask 32 9 0 8 1 0 1 1 0 8 0 uvmvnodes 80 3768 0 0 77 0 77 77 0 8 0 vnodes 216 3768 0 0 210 0 210 210 0 8 0 namei 1024 16504 0 16504 1 0 1 1 0 8 1 percpumem 16 104 0 55 1 0 1 1 0 8 0 kstatmem 264 96 0 70 3 1 2 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 3 2 1 1 0 8 1 scxspl 216 30531 0 30531 9 7 2 7 1 8 2 plimitpl 152 283 0 266 1 0 1 1 0 8 0 sigapl 424 1337 0 1288 7 1 6 7 0 8 0 knotepl 120 506 0 0 15 0 15 15 0 8 0 kqueuepl 224 637 0 628 8 3 5 5 0 8 4 pipepl 344 245 0 218 9 0 9 9 0 8 6 fdescpl 528 1312 0 1280 3 0 3 3 0 8 0 filepl 160 9171 0 8945 24 4 20 20 0 8 6 lockfpl 104 430 0 424 1 0 1 1 0 8 0 lockfspl 48 163 0 159 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 58 0 41 1 0 1 1 0 8 0 ucredpl 104 1269 0 1255 1 0 1 1 0 8 0 zombiepl 144 1290 0 1288 1 0 1 1 0 8 0 processpl 1232 1337 0 1288 6 1 5 5 0 8 0 procpl 664 2877 0 2820 6 0 6 6 0 8 0 sosppl 168 3 0 3 1 1 0 1 0 8 0 sockpl 752 2391 0 2356 48 34 14 24 0 8 8 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 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 113 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1173 0 0 72 0 72 72 0 8 0 bufpl 280 13616 0 7472 440 0 440 440 0 8 0 anonpl 32 11632 0 0 94 0 94 94 0 246 0 amapchunkpl 152 36617 0 36114 44 12 32 32 0 158 4 amappl16 200 5485 0 5449 50 22 28 28 0 8 17 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 131 0 119 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 2025 0 1993 3 1 2 2 0 8 0 amappl11 160 63 0 49 1 0 1 1 0 8 0 amappl10 152 29 0 28 1 0 1 1 0 8 0 amappl9 144 252 0 251 1 0 1 1 0 8 0 amappl8 136 18 0 16 1 0 1 1 0 8 0 amappl7 128 134 0 122 1 0 1 1 0 8 0 amappl6 120 219 0 216 1 0 1 1 0 8 0 amappl5 112 138 0 128 1 0 1 1 0 8 0 amappl4 104 337 0 316 1 0 1 1 0 8 0 amappl3 96 6411 0 6312 3 0 3 3 0 8 0 amappl2 88 1588 0 1508 2 0 2 2 0 8 0 amappl1 80 13316 0 12711 16 1 15 15 0 8 0 amappl 88 10108 0 9938 5 0 5 5 0 92 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 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 33 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1312 0 1280 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1312 0 1280 1 0 1 1 0 8 0 vmmpekpl 168 11796 0 11748 3 0 3 3 0 8 0 vmmpepl 168 90179 0 88123 122 10 112 112 0 357 8 vmsppl 488 1311 0 1280 6 1 5 5 0 8 0 rwobjpl 80 30578 0 25830 109 3 106 106 0 8 0 pdppl 4096 2632 0 2560 114 42 72 84 0 8 0 pvpl 32 19293 0 0 157 1 156 156 0 265 0 pmappl 256 1311 0 1280 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 354 0 58 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837adff0) 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(ffffffff838a6868) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838a6868) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) 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 __mp_lock(ffffffff838a6868) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) at __mp_lock+0x19e sys/kern/kern_lock.c:165 uvm_fault(fffffd8066cfa9b0,25b4d689000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80002a34aab0,25b4d689000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 end trace frame: 0xffff80002a34aaa0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837adff0) 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(ffffffff838a6868) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838a6868) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) 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 __mp_lock(ffffffff838a6868) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) at __mp_lock+0x19e sys/kern/kern_lock.c:165 uvm_fault(fffffd8066cfa9b0,25b4d689000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80002a34aab0,25b4d689000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a34aab0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x721e77a9e7a0, count: -16 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x73da18d46c90, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x73da18d46c90, count: -1