uvm_fault(0xfffffd806c97fd70, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82775268 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c42cfb0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82775268 Starting stack trace... panic(ffffffff833e6e75) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c42cf00) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001596000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80002a261770) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a261770) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c42d0b0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c37e630,81,fffffd80097fd410,ffff80002a261770) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c6e6a40,ffff80002a261770) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c6e6a40,ffff80002a261770) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c6e6a40,ffff80002a261770) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c6e6a40,ffff80002a261770) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a261770) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a261770,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a261770,ffff80003c42d420,ffff80003c42d370) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c42d420) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42d420) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7815ea1e2310, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 302597120 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 509700 33529 0 0 0 0 syz-executor *241418 39961 0 0 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7ba6cc2fd0e0, 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(0xfffffd806c97fd70, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7ba6cc2fd0e0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4212b0 rbx 0 rdx 0 rcx 0xffff8000363d67e8 rax 0x3a r8 0xffff80003c4211e0 r9 0x1 r10 0x35d1f5939bab3f6a r11 0x574ec7d39bc85c45 r12 0 r13 0 r14 0xffff8000363d67e8 r15 0 rip 0xffffffff825ad3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c421230 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=241418 pid=39961 tcnt=3 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000363d8558,0xffff8000363d6a90 process=0xffff8000fffece88 user=0xffff80003c41c000, vmspace=0xfffffd806c97fb88 estcpu=36, cpticks=4, pctcpu=0.0, user=3, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23833 117047 85658 0 2 0 syz-executor 33529 509700 57177 0 7 0 syz-executor 33529 471925 57177 0 2 0x4000000 syz-executor 99711 314937 52854 0 2 0 syz-executor 99711 332084 52854 0 3 0x4000080 fsleep syz-executor 51825 345730 28686 0 2 0 syz-executor 51825 460089 28686 0 2 0x4000000 syz-executor *39961 241418 96685 0 7 0 syz-executor 39961 179768 96685 0 3 0x4000080 fsleep syz-executor 39961 385023 96685 0 3 0x4000080 fsleep syz-executor 46138 152922 37882 0 2 0 syz-executor 46138 271255 37882 0 3 0x4000080 pppxread syz-executor 46138 358873 37882 0 3 0x4000080 fsleep syz-executor 46138 513392 37882 0 3 0x4000080 fsleep syz-executor 70387 327945 2299 0 2 0 syz-executor 70387 370677 2299 0 3 0x4000080 fsleep syz-executor 70387 210443 2299 0 3 0x4000080 fsleep syz-executor 72557 454843 1 0 3 0x100083 ttyin getty 96685 24101 21824 0 3 0x82 nanoslp syz-executor 52854 293666 21824 0 3 0x82 nanoslp syz-executor 2299 508049 21824 0 3 0x82 nanoslp syz-executor 37882 269298 21824 0 3 0x82 nanoslp syz-executor 8216 95892 21824 0 3 0x82 nanoslp syz-executor 28686 494989 21824 0 3 0x82 nanoslp syz-executor 57177 142763 21824 0 3 0x82 nanoslp syz-executor 85658 3511 21824 0 3 0x82 nanoslp syz-executor 21824 224067 48304 0 3 0x82 kqread syz-executor 48304 73809 42498 0 3 0x10008a sigsusp ksh 42498 336962 97707 0 3 0x98 kqread sshd-session 97707 228056 99490 0 3 0x92 kqread sshd-session 99490 443143 1 0 3 0x88 kqread sshd 154 225612 59421 74 3 0x1100092 bpf pflogd 59421 36762 1 0 3 0x80 sbwait pflogd 49363 349996 66969 73 3 0x1100090 kqread syslogd 66969 480817 1 0 3 0x100082 sbwait syslogd 62767 252723 1 0 3 0x100080 kqread resolvd 26009 195837 26402 77 3 0x100092 kqread dhcpleased 95736 453550 26402 77 3 0x100092 kqread dhcpleased 26402 28063 1 0 3 0x80 kqread dhcpleased 54376 265405 0 0 3 0x14200 pause smr 52960 437753 0 0 2 0x14200 zerothread 32916 12220 0 0 3 0x14200 aiodoned aiodoned 73542 228472 0 0 3 0x14200 syncer update 81111 506174 0 0 3 0x14200 cleaner cleaner 93064 185229 0 0 3 0x14200 reaper reaper 76695 345080 0 0 3 0x14200 pgdaemon pagedaemon 9937 122838 0 0 3 0x14200 bored viomb 12121 479984 0 0 3 0x40014200 acpi0 acpi0 38788 354028 0 0 3 0x40014200 idle1 31820 170281 0 0 3 0x14200 bored softnet1 21221 142703 0 0 3 0x14200 netlock softnet0 12969 122258 0 0 3 0x14200 smrbar systqmp 41069 311399 0 0 3 0x14200 bored systq 61212 413102 0 0 3 0x14200 tmoslp softclockmp 90472 216733 0 0 3 0x40014200 tmoslp softclock 89758 320220 0 0 3 0x40014200 idle0 1 372944 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 12969 (systqmp) thread 0xffff8000ffffe298 (122258) shared rwlock systqmp r = 0 (0xffffffff837d0858) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11078 12256K 12546K 166960K 12533 0 pcb 18 12K 12K 166960K 43 0 rtable 211 6K 7K 166960K 361 0 pf 32 17K 19K 166960K 46 0 ifaddr 38 6K 7K 166960K 45 0 ifgroup 51 2K 2K 166960K 55 0 sysctl 3 1K 9K 166960K 11 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 1496 0 iov 0 0K 12K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1352 85K 85K 166960K 1528 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 85K 166960K 298 0 sigio 0 0K 0K 166960K 134 0 proc 72 115K 147K 166960K 552 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 25 0 in_multi 87 6K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 390 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 231 166K 181K 166960K 4633 0 UVM aobj 9 2K 2K 166960K 11 0 pinsyscall 43 86K 100K 166960K 1426 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 11 0K 2K 166960K 28 0 temp 40 8667K 8731K 166960K 13247 0 kqueue 15 24K 24K 166960K 36 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 42 0 38 1 0 1 1 0 8 0 rtentry 176 115 0 18 6 0 6 6 0 8 0 unpcb 144 227 0 208 6 0 6 6 0 8 5 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 35 0 31 1 0 1 1 0 8 0 arp 136 19 0 3 1 0 1 1 0 8 0 inpcb 328 177 0 167 2 0 2 2 0 8 1 nd6 152 25 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 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 32 0 0 1 0 1 1 0 8 0 pfstkey 128 32 0 0 2 0 2 2 0 8 0 pfstate 448 32 0 0 4 0 4 4 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 456 0 8 29 0 29 29 0 8 0 art_table 40 457 0 8 5 0 5 5 0 8 0 art_node 32 115 0 27 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 8 0 2 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1903 0 385 96 0 96 96 0 8 0 ffsino 296 1903 0 385 118 0 118 118 0 8 0 nchpl 144 2314 0 610 64 0 64 64 0 8 0 vnodes 216 2065 0 0 115 0 115 115 0 8 0 namei 1024 7454 0 7454 1 0 1 1 0 8 1 percpumem 16 50 0 1 1 0 1 1 0 8 0 kstatmem 264 26 0 2 2 0 2 2 0 8 0 scxspl 216 8008 0 8008 10 2 8 8 1 8 8 plimitpl 152 86 0 67 1 0 1 1 0 8 0 sigapl 424 607 0 559 6 0 6 6 0 8 0 knotepl 120 315 0 0 10 0 10 10 0 8 0 kqueuepl 224 61 0 47 2 0 2 2 0 8 1 pipepl 344 170 0 142 6 0 6 6 0 8 3 fdescpl 528 591 0 559 3 0 3 3 0 8 0 filepl 160 3010 0 2776 20 2 18 20 0 8 8 lockfpl 104 73 0 71 1 0 1 1 0 8 0 lockfspl 48 32 0 30 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 316 0 303 1 0 1 1 0 8 0 zombiepl 144 560 0 559 1 0 1 1 0 8 0 processpl 1232 607 0 559 5 0 5 5 0 8 1 procpl 664 915 0 857 6 0 6 6 0 8 0 sockpl 752 449 0 416 17 6 11 17 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 107 0 0 14 0 14 14 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 49 0 0 2 0 2 2 0 8 0 mbufpl 256 190 0 0 12 0 12 12 0 8 0 bufpl 280 2879 0 132 197 0 197 197 0 8 0 anonpl 32 5943 0 0 48 0 48 48 0 246 0 amapchunkpl 152 13949 0 13490 27 0 27 27 0 158 5 amappl16 200 2101 0 2059 6 2 4 5 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 2 0 2 1 1 0 1 0 8 0 amappl13 176 424 0 423 1 0 1 1 0 8 0 amappl12 168 964 0 922 3 0 3 3 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 61 0 47 1 0 1 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 81 0 80 1 0 1 1 0 8 0 amappl6 120 281 0 268 1 0 1 1 0 8 0 amappl5 112 77 0 67 1 0 1 1 0 8 0 amappl4 104 412 0 383 1 0 1 1 0 8 0 amappl3 96 2412 0 2309 4 1 3 3 0 8 0 amappl2 88 523 0 462 2 0 2 2 0 8 0 amappl1 80 9799 0 9197 14 0 14 14 0 8 1 amappl 88 3882 0 3728 4 0 4 4 0 92 0 uvmvnodes 80 108 0 0 3 0 3 3 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 128 253 0 253 1 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 10 0 2 1 0 1 1 0 8 0 uaddrrnd 24 592 0 560 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 592 0 560 1 0 1 1 0 8 0 vmmpekpl 168 6695 0 6657 2 0 2 2 0 8 0 vmmpepl 168 44862 0 42903 88 0 88 88 0 357 0 vmsppl 488 591 0 560 5 0 5 5 0 8 1 rwobjpl 80 15367 0 14330 24 1 23 23 0 8 0 pdppl 4096 1192 0 1120 94 22 72 82 0 8 0 pvpl 32 13403 0 0 109 0 109 109 0 265 0 pmappl 256 591 0 560 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 267 0 25 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837fbff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:583 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:153 __mp_lock(ffffffff838bc140) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838bc140) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838bc140) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838bc140) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7e3f0c943b40, count: 3 ddb{0}> trace x86_ipi_db(ffffffff837fbff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:583 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:153 __mp_lock(ffffffff838bc140) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838bc140) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838bc140) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838bc140) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7e3f0c943b40, count: -12 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7ba6cc2fd0e0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7ba6cc2fd0e0, count: -1