uvm_fault(0xfffffd805eb63d80, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff821dd2b8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a3bebf0 gsbase 0xffff8000299fdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff821dd2b8 Starting stack trace... panic(ffffffff833a05aa) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a3beb40) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001593000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003943dcb8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003943dcb8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3becf0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b9bb448,81,fffffd80097fb7b8,ffff80003943dcb8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060506980,ffff80003943dcb8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060506980,ffff80003943dcb8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060506980,ffff80003943dcb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8060506980,ffff80003943dcb8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003943dcb8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003943dcb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003943dcb8,ffff80002a3bf060,ffff80002a3befb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3bf060) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bf060) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e86714a9be0, count: 242 End of stack trace. WA RNING: SPL NOT LOWERED ON SYSCALL 83 770480240 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *101201 13155 0 0 0x4000000 1 syz-executor 377747 45888 0 0x14000 0x40000200 0 softclock savectx() at savectx+0xae end of kernel end trace frame: 0xfcbc98bff00, 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(0xfffffd805eb63d80, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xfcbc98bff00, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c46b5e0 rbx 0 rdx 0xffff800001458a00 rcx 0xffff80003b454fc8 rax 0x3a r8 0xffff80003c46b510 r9 0x1 r10 0x40b30f18c45a09f2 r11 0xd04661c2e7629e25 r12 0 r13 0 r14 0xffff80003b454fc8 r15 0 rip 0xffffffff829e73ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c46b560 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=101201 pid=13155 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003b455a28,0xffffffff83925270 process=0xffff80003c554500 user=0xffff80003c466000, vmspace=0xfffffd805eb635e0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 13155 200247 17641 0 2 0 syz-executor *13155 101201 17641 0 7 0x4000000 syz-executor 92572 118117 50934 0 2 0 syz-executor 92572 427462 50934 0 3 0x4000080 fsleep syz-executor 89508 472423 0 0 3 0x14200 acct acct 74558 462537 86714 0 2 0xc80 syz-executor 74558 272153 86714 0 3 0x4000080 sbwait syz-executor 74558 6464 86714 0 3 0x4000080 fsleep syz-executor 74791 340515 55855 0 2 0xc82 syz-executor 44207 33810 55855 0 3 0x82 wait syz-executor 68061 52326 17976 0 3 0x82 sbwait sshd-session 2741 295138 55855 0 2 0xc82 syz-executor 84306 479544 0 0 3 0x14280 nfsidl nfsio 41433 33135 0 0 3 0x14280 nfsidl nfsio 42657 496898 0 0 3 0x14280 nfsidl nfsio 96512 228911 0 0 3 0x14280 nfsidl nfsio 77330 441767 0 0 3 0x14280 nfsidl nfsio 91413 255563 0 0 3 0x14280 nfsidl nfsio 23620 62205 0 0 3 0x14280 nfsidl nfsio 14444 305112 0 0 3 0x14280 nfsidl nfsio 26817 523061 0 0 3 0x14280 nfsidl nfsio 2528 358898 0 0 3 0x14280 nfsidl nfsio 13942 179111 0 0 3 0x14280 nfsidl nfsio 70700 68989 0 0 3 0x14280 nfsidl nfsio 42863 248089 0 0 3 0x14280 nfsidl nfsio 73324 504661 0 0 3 0x14280 nfsidl nfsio 9988 159801 0 0 3 0x14280 nfsidl nfsio 23600 178765 0 0 3 0x14280 nfsidl nfsio 88538 44022 0 0 3 0x14280 nfsidl nfsio 48037 32075 0 0 3 0x14280 nfsidl nfsio 13581 54901 0 0 3 0x14280 nfsidl nfsio 54408 248223 0 0 3 0x14280 nfsidl nfsio 11643 342400 0 0 3 0x14200 bored sosplice 42635 210164 55855 0 2 0xc82 syz-executor 50934 436183 55855 0 2 0xc82 syz-executor 52914 324176 55855 0 3 0x82 piperd syz-executor 86714 454593 55855 0 2 0xc82 syz-executor 17641 201986 55855 0 2 0xc82 syz-executor 55855 483320 74305 0 2 0x2 syz-executor 74305 120410 1986 0 3 0x10008a sigsusp ksh 1986 391043 84866 0 3 0x98 kqread sshd-session 84866 221849 17976 0 3 0x92 kqread sshd-session 25484 161561 1 0 2 0x100083 getty 17976 367331 1 0 3 0x88 kqread sshd 17862 77334 61529 74 3 0x1100092 bpf pflogd 61529 233464 1 0 3 0x80 sbwait pflogd 92267 214980 39475 73 3 0x1100090 kqread syslogd 39475 494610 1 0 3 0x100082 sbwait syslogd 20757 271722 1 0 3 0x100080 kqread resolvd 22183 293632 30978 77 3 0x100092 kqread dhcpleased 74720 114146 30978 77 3 0x100092 kqread dhcpleased 30978 742 1 0 3 0x80 kqread dhcpleased 25000 17987 0 0 2 0x14200 smr 21400 18153 0 0 3 0x14200 pgzero zerothread 17735 432447 0 0 3 0x14200 aiodoned aiodoned 50732 221621 0 0 3 0x14200 syncer update 99277 1025 0 0 3 0x14200 cleaner cleaner 25089 465243 0 0 3 0x14200 reaper reaper 73256 131063 0 0 3 0x14200 pgdaemon pagedaemon 69707 520377 0 0 3 0x14200 bored viomb 66795 67551 0 0 3 0x40014200 acpi0 acpi0 68455 158245 0 0 3 0x40014200 idle1 47574 66606 0 0 3 0x14200 bored softnet7 8258 316100 0 0 3 0x14200 bored softnet6 30069 434030 0 0 3 0x14200 bored softnet5 14930 188348 0 0 3 0x14200 bored softnet4 66404 401153 0 0 3 0x14200 bored softnet3 59769 356829 0 0 3 0x14200 bored softnet2 8016 482083 0 0 3 0x14200 bored softnet1 22540 249705 0 0 2 0x14200 softnet0 76804 225440 0 0 2 0x14200 systqmp 684 215248 0 0 3 0x14200 bored systq 34754 505363 0 0 2 0x14200 softclockmp 45888 377747 0 0 7 0x40014200 softclock 49620 320548 0 0 3 0x40014200 idle0 1 256052 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 10392 11837K 12338K 166960K 13926 0 pcb 18 16K 18K 166960K 372 0 rtable 150 10K 13K 166960K 608 0 pf 38 18K 82K 166960K 237 0 ifaddr 30 5K 8K 166960K 149 0 ifgroup 56 2K 3K 166960K 259 0 sysctl 4 1K 9K 166960K 17 0 counters 68 36K 38K 166960K 266 0 ioctlops 0 0K 4K 166960K 1866 0 iov 0 0K 24K 166960K 87 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1490 94K 94K 166960K 3038 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 19 6K 6K 166960K 23 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1598 0 sigio 0 0K 0K 166960K 44 0 proc 74 115K 163K 166960K 777 0 subproc 72 4K 4K 166960K 111 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 400 0 in_multi 35 2K 7K 166960K 216 0 ether_multi 1 0K 0K 166960K 20 0 mrt 3 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 612 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 169K 183K 166960K 16275 0 UVM aobj 111 5K 5K 166960K 119 0 pinsyscall 44 88K 102K 166960K 2877 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 99 0 NDP 12 0K 2K 166960K 103 0 temp 86 8656K 8901K 166960K 69272 0 kqueue 14 22K 31K 166960K 321 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 120 180 0 176 2 0 2 2 0 8 1 rtentry 176 201 0 154 5 0 5 5 0 8 0 unpcb 144 1083 0 1057 11 5 6 6 0 8 5 syncache 336 17 0 17 5 4 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 557 0 548 9 2 7 7 0 8 5 arp 136 24 0 15 1 0 1 1 0 8 0 inpcb 328 1728 0 1713 18 11 7 7 0 8 4 nd6 144 34 0 29 1 0 1 1 0 8 0 pkpcb 40 9 0 9 3 2 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 72 0 71 2 1 1 1 0 8 0 pppxif 1504 9 0 9 2 1 1 1 0 8 1 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 9 0 4 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 16 0 11 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 5 0 5 2 2 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 164 0 33 1 0 1 1 0 8 0 pfstkey 128 165 0 34 5 0 5 5 0 8 0 pfstate 384 163 0 34 13 0 13 13 0 8 0 pfrule 1344 26 0 21 2 1 1 2 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 854 0 680 34 8 26 31 0 8 8 art_table 40 859 0 680 5 0 5 5 0 8 0 art_node 32 195 0 156 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 14 2 1 1 1 0 8 0 semapl 112 19 0 2 1 0 1 1 0 8 0 shmpl 112 116 0 8 4 0 4 4 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 4457 0 2942 96 0 96 96 0 8 0 ffsino 296 4457 0 2942 118 0 118 118 0 8 0 nchpl 144 6727 0 6119 64 35 29 64 0 8 4 rtmask 32 18 0 18 3 2 1 1 0 8 1 uvmvnodes 80 5495 0 0 113 0 113 113 0 8 0 vnodes 216 5495 0 0 306 0 306 306 0 8 0 namei 1024 23616 0 23616 5 4 1 2 0 8 1 percpumem 16 148 0 99 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 160 0 130 5 2 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 39437 0 39437 15 11 4 8 1 8 4 plimitpl 152 359 0 342 1 0 1 1 0 8 0 sigapl 424 1929 0 1853 9 0 9 9 0 8 0 knotepl 120 626 0 0 19 0 19 19 0 8 0 kqueuepl 224 680 0 668 9 7 2 5 0 8 1 pipepl 344 282 0 255 6 3 3 6 0 8 0 fdescpl 528 1883 0 1851 3 0 3 3 0 8 0 filepl 160 12747 0 12447 28 9 19 19 0 8 5 lockfpl 104 598 0 596 1 0 1 1 0 8 0 lockfspl 48 244 0 242 1 0 1 1 0 8 0 sessionpl 144 40 0 30 1 0 1 1 0 8 0 pgrppl 48 76 0 58 1 0 1 1 0 8 0 ucredpl 104 1920 0 1904 1 0 1 1 0 8 0 zombiepl 144 2177 0 2173 1 0 1 1 0 8 0 processpl 1232 1929 0 1853 7 0 7 7 0 8 0 procpl 664 4345 0 4265 8 0 8 8 0 8 0 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 752 3035 0 2990 40 28 12 24 0 8 6 mcl64k 65536 14 0 0 2 0 2 2 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 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 45 0 0 5 0 5 5 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 228 0 0 14 0 14 14 0 8 0 bufpl 280 15865 0 9721 440 0 440 440 0 8 0 anonpl 32 13863 0 0 112 0 112 112 0 246 0 amapchunkpl 152 54091 0 53513 56 24 32 32 0 158 4 amappl16 200 7242 0 7183 68 52 16 30 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 150 0 137 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 2667 0 2635 4 2 2 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 11 0 10 1 0 1 1 0 8 0 amappl9 144 339 0 339 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 133 0 119 1 0 1 1 0 8 0 amappl6 120 243 0 238 1 0 1 1 0 8 0 amappl5 112 136 0 126 1 0 1 1 0 8 0 amappl4 104 368 0 349 1 0 1 1 0 8 0 amappl3 96 9720 0 9621 4 1 3 4 0 8 0 amappl2 88 2240 0 2155 3 0 3 3 0 8 0 amappl1 80 17850 0 17151 18 1 17 17 0 8 0 amappl 88 15200 0 15022 5 0 5 5 0 92 0 dma32768 32768 2 0 2 2 1 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 72 118 0 8 2 0 2 2 0 8 0 uaddrrnd 24 1883 0 1851 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1883 0 1851 1 0 1 1 0 8 0 vmmpekpl 168 16954 0 16899 3 0 3 3 0 8 0 vmmpepl 168 128072 0 125883 123 9 114 119 0 357 6 vmsppl 488 1882 0 1851 7 2 5 5 0 8 0 rwobjpl 80 42224 0 35535 138 0 138 138 0 8 0 pdppl 4096 3773 0 3702 115 40 75 85 0 8 4 pvpl 32 20887 0 0 168 0 168 168 0 265 0 pmappl 256 1882 0 1851 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 321 0 63 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83851ff0) 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(ffffffff83993bc8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83993bc8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a218c20,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83993bc8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83993bc8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83993bc8,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff837bfbf8) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000ffffef90) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83851ff0) 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(ffffffff83993bc8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83993bc8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a218c20,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83993bc8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83993bc8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83993bc8,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff837bfbf8) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000ffffef90) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0xfcbc98bff00, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xfcbc98bff00, count: -1