uvm_fault(0xfffffd806eeed7a8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff832d2c88 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff80002a2f06e0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff832d2c88 Starting stack trace... panic(ffffffff833b8594) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a2f0630) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001477000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80003c468a88) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c468a88) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a2f07e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8071b58bd0,81,fffffd80097fb4e0,ffff80003c468a88) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1d27c0,ffff80003c468a88) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1d27c0,ffff80003c468a88) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1d27c0,ffff80003c468a88) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c1d27c0,ffff80003c468a88) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c468a88) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c468a88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c468a88,ffff80002a2f0b50,ffff80002a2f0aa0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2f0b50) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2f0b50) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c4f697f250, 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 *307674 93402 0 0 0 1 syz-executor 113430 30556 0 0x14000 0x200 0 systqmp proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6ffea335f8a0, 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(0xfffffd806eeed7a8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6ffea335f8a0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a37e280 rbx 0 rdx 0 rcx 0xffff8000fffeed10 rax 0x2a r8 0xffff80002a37e1b0 r9 0x1 r10 0x2cb2910c7a73a073 r11 0x47788cdedef592ac r12 0 r13 0xffffffff8110e5b8 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff812764c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a37e200 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=307674 pid=93402 tcnt=2 stat=onproc flags process=0 proc=0 runpri=81, usrpri=81, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffef770,0xffff8000fffeefb8 process=0xffff80002a3cce88 user=0xffff80002a379000, vmspace=0xfffffd806eeed008 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 41348 184353 43048 0 2 0 syz-executor 41348 373864 43048 0 3 0x4000080 fsleep syz-executor *93402 307674 40499 0 7 0 syz-executor 93402 423854 40499 0 2 0x4000000 syz-executor 93691 350332 65165 0 2 0 syz-executor 93691 124627 65165 0 3 0x4000000 biowait syz-executor 93691 119641 65165 0 3 0x4000000 inode syz-executor 93691 517433 65165 0 3 0x4000000 inode syz-executor 23778 274985 23880 0 2 0 syz-executor 23778 292785 23880 0 3 0x4000000 biowait syz-executor 23778 428433 23880 0 3 0x4000080 fsleep syz-executor 23778 390461 23880 0 3 0x4000080 fsleep syz-executor 23880 509209 20808 0 2 0x2 syz-executor 65165 79267 20808 0 3 0x82 nanoslp syz-executor 20676 212562 1 0 3 0x80 nanoslp init 57213 146701 20808 0 3 0x82 nanoslp syz-executor 40499 267511 20808 0 3 0x82 nanoslp syz-executor 8701 341784 20808 0 3 0x82 wait syz-executor 31838 318806 20808 0 3 0x82 nanoslp syz-executor 97802 66763 0 0 3 0x14200 bored sosplice 33614 210202 0 0 3 0x14280 nfsidl nfsio 68577 307129 0 0 3 0x14280 nfsidl nfsio 42841 353721 0 0 3 0x14280 nfsidl nfsio 40898 369624 0 0 3 0x14280 nfsidl nfsio 43048 204059 20808 0 3 0x82 nanoslp syz-executor 38149 460947 20808 0 2 0x2 syz-executor 20808 72696 80382 0 3 0x82 kqread syz-executor 80382 447532 81519 0 3 0x10008a sigsusp ksh 81519 75991 90658 0 3 0x98 kqread sshd-session 90658 133194 41976 0 3 0x92 kqread sshd-session 41976 18622 1 0 3 0x88 kqread sshd 18920 78378 41138 74 3 0x1100092 bpf pflogd 41138 367647 1 0 3 0x80 sbwait pflogd 19391 502625 81758 73 3 0x1100090 kqread syslogd 81758 469551 1 0 3 0x100082 sbwait syslogd 6242 306755 1 0 3 0x100080 kqread resolvd 27076 239757 0 0 3 0x14200 bored smr 66109 481969 0 0 3 0x14200 pgzero zerothread 77727 212509 0 0 3 0x14200 aiodoned aiodoned 77815 88883 0 0 3 0x14200 syncer update 2575 367649 0 0 3 0x14200 cleaner cleaner 35213 473025 0 0 3 0x14200 reaper reaper 63744 89672 0 0 3 0x14200 pgdaemon pagedaemon 24022 446978 0 0 3 0x14200 bored viomb 75515 382327 0 0 3 0x40014200 acpi0 acpi0 94636 3400 0 0 3 0x40014200 idle1 86688 125934 0 0 3 0x14200 bored softnet1 36769 61173 0 0 3 0x14200 netlock softnet0 30556 113430 0 0 7 0x14200 systqmp 4508 365599 0 0 3 0x14200 bored systq 14211 4649 0 0 3 0x14200 tmoslp softclockmp 57034 461968 0 0 3 0x40014200 tmoslp softclock 89703 349610 0 0 3 0x40014200 idle0 1 164969 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 93691 (syz-executor) thread 0xffff8000fffefca0 (124627) Process 93691 (syz-executor) thread 0xffff8000fffee7e0 (119641) Process 23778 (syz-executor) thread 0xffff8000fffeea78 (292785) Process 30556 (systqmp) thread 0xffff8000ffffe000 (113430) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10236 11083K 11175K 166960K 12677 0 pcb 17 16K 17K 166960K 463 0 rtable 248 14K 14K 166960K 1015 0 pf 40 18K 67486K 166960K 325 0 ifaddr 46 8K 9K 166960K 207 0 ifgroup 63 2K 2K 166960K 316 0 sysctl 4 1K 9K 166960K 20 0 counters 72 37K 38K 166960K 338 0 ioctlops 0 0K 4K 166960K 2018 0 iov 0 0K 28K 166960K 209 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1396 88K 88K 166960K 3155 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 620K 620K 166960K 52 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 105 0 dirhash 12 2K 2K 166960K 87 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 2583 0 sigio 0 0K 0K 166960K 86 0 proc 57 67K 180K 166960K 1071 0 subproc 72 4K 4K 166960K 157 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 332 0 in_multi 81 5K 7K 166960K 372 0 ether_multi 1 0K 0K 166960K 50 0 mrt 2 0K 0K 166960K 28 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 163 731K 731K 166960K 163 0 exec 0 0K 1K 166960K 953 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 229 149K 194K 166960K 24931 0 UVM aobj 79 3K 4K 166960K 88 0 pinsyscall 36 72K 98K 166960K 3971 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 161 0 NDP 14 0K 2K 166960K 137 0 temp 81 8656K 8732K 166960K 91926 0 kqueue 7 12K 28K 166960K 448 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 120 264 0 263 2 1 1 2 0 8 0 rtentry 176 301 0 209 6 1 5 6 0 8 0 unpcb 144 1752 0 1742 11 9 2 6 0 8 1 syncache 336 13 0 13 4 4 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 1123 0 1117 17 15 2 7 0 8 1 arp 136 51 0 33 1 0 1 1 0 8 0 inpcb 328 3011 0 3002 24 19 5 12 0 8 3 nd6 152 55 0 35 1 0 1 1 0 8 0 pkpcb 40 24 0 24 3 3 0 1 0 8 0 kcovpl 48 17 0 9 1 0 1 1 0 8 0 ppxss 1192 105 0 105 1 0 1 1 0 8 1 pppxif 1504 9 0 9 4 4 0 1 0 8 0 pfstscr 40 9 0 9 3 3 0 1 0 8 0 pffrag 232 20 0 12 1 0 1 1 0 482 0 pffrnode 88 14 0 6 1 0 1 1 0 8 0 pffrent 40 67 0 59 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 175 0 62 1 0 1 1 0 8 0 pfstkey 128 220 0 107 4 0 4 4 0 8 0 pfstate 384 212 0 101 12 0 12 12 0 8 0 pfrule 1344 40 0 36 2 1 1 2 0 8 0 rttmr 136 7 0 7 3 2 1 1 0 8 1 art_heap8 4096 6 0 0 6 0 6 6 0 8 0 art_heap4 256 1525 0 1161 38 11 27 29 0 8 2 art_table 40 1531 0 1161 5 0 5 5 0 8 0 art_node 32 296 0 214 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 100 0 90 1 0 1 1 0 8 0 shmpl 112 85 0 9 3 0 3 3 0 8 0 dirhash 1024 69 0 52 3 0 3 3 0 8 0 dino2pl 256 6204 0 4671 97 0 97 97 0 8 0 ffsino 296 6204 0 4671 119 0 119 119 0 8 0 nchpl 144 9703 0 9095 64 41 23 64 0 8 0 rtmask 32 23 0 23 3 2 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 33801 0 33799 2 1 1 2 0 8 0 percpumem 16 184 0 133 1 0 1 1 0 8 0 kstatmem 264 212 0 178 3 0 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 13 0 13 4 4 0 1 0 8 0 scxspl 216 92451 0 92449 15 12 3 8 1 8 2 plimitpl 152 732 0 714 1 0 1 1 0 8 0 sigapl 424 2867 0 2817 7 0 7 7 0 8 0 knotepl 120 587 0 0 17 0 17 17 0 8 0 kqueuepl 224 914 0 908 10 9 1 5 0 8 0 pipepl 344 414 0 385 7 4 3 7 0 8 0 fdescpl 528 2841 0 2812 3 0 3 3 0 8 0 filepl 160 18243 0 18029 24 9 15 16 0 8 3 lockfpl 104 851 0 849 2 0 2 2 0 8 1 lockfspl 48 370 0 368 1 0 1 1 0 8 0 sessionpl 144 38 0 31 1 0 1 1 0 8 0 pgrppl 48 74 0 59 1 0 1 1 0 8 0 ucredpl 104 2803 0 2793 1 0 1 1 0 8 0 zombiepl 144 2821 0 2817 1 0 1 1 0 8 0 processpl 1232 2867 0 2817 5 0 5 5 0 8 0 procpl 664 6866 0 6808 7 1 6 7 0 8 0 sosppl 168 20 0 20 3 2 1 1 0 8 1 sockpl 752 5105 0 5085 40 34 6 18 0 8 3 mcl64k 65536 21 0 0 3 0 3 3 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 40 0 0 5 0 5 5 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 925 0 0 57 0 57 57 0 8 0 bufpl 280 39242 0 33105 439 0 439 439 0 8 0 anonpl 32 14101 0 0 114 0 114 114 0 246 0 amapchunkpl 152 90791 0 90226 48 21 27 34 0 158 5 amappl16 200 12753 0 12695 90 70 20 37 0 8 7 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 19 0 19 3 3 0 1 0 8 0 amappl13 176 544 0 542 1 0 1 1 0 8 0 amappl12 168 3286 0 3251 3 0 3 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 52 0 44 1 0 1 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 27 0 23 1 0 1 1 0 8 0 amappl7 128 141 0 139 1 0 1 1 0 8 0 amappl6 120 400 0 389 1 0 1 1 0 8 0 amappl5 112 84 0 76 1 0 1 1 0 8 0 amappl4 104 510 0 485 1 0 1 1 0 8 0 amappl3 96 15084 0 14990 3 0 3 3 0 8 0 amappl2 88 2969 0 2911 2 0 2 2 0 8 0 amappl1 80 20941 0 20459 15 2 13 15 0 8 0 amappl 88 23572 0 23399 5 0 5 5 0 92 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 dma65536 65536 2 0 2 2 1 1 1 0 8 1 dma16384 16384 2 0 2 2 2 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 7 0 7 2 2 0 1 0 8 0 dma128 128 259 0 259 4 4 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 87 0 9 2 0 2 2 0 8 0 uaddrrnd 24 2841 0 2812 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2841 0 2812 1 0 1 1 0 8 0 vmmpekpl 168 22953 0 22904 3 0 3 3 0 8 0 vmmpepl 168 187816 0 186080 133 32 101 106 0 357 11 vmsppl 488 2840 0 2812 5 1 4 5 0 8 0 rwobjpl 80 57370 0 50569 149 1 148 148 0 8 0 pdppl 4096 5690 0 5624 116 50 66 80 0 8 0 pvpl 32 20218 0 0 164 1 163 163 0 265 0 pmappl 256 2840 0 2812 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 376 0 87 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83868ff0) 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(ffffffff8394b8b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8394b8b0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a219f90,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 taskq_next_work(ffffffff838548a0,ffff80002a21a128) at taskq_next_work+0x8e sys/kern/kern_task.c:399 taskq_thread(ffffffff838548a0) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff83868ff0) 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(ffffffff8394b8b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8394b8b0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a219f90,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 taskq_next_work(ffffffff838548a0,ffff80002a21a128) at taskq_next_work+0x8e sys/kern/kern_task.c:399 taskq_thread(ffffffff838548a0) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 end trace frame: 0x0, count: -9 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: 0x6ffea335f8a0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6ffea335f8a0, count: -1