uvm_fault(0xfffffd807a58f3d8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82342d88 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c443920 gsbase 0xffff8000299fdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82342d88 Starting stack trace... panic(ffffffff833a2119) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c443870) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000146a000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,81,2000,ffff8000368187e8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000368187e8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c443a20) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d6811e8,81,fffffd80097fb3a8,ffff8000368187e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bd98988,ffff8000368187e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bd98988,ffff8000368187e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806bd98988,ffff8000368187e8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806bd98988,ffff8000368187e8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000368187e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000368187e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000368187e8,ffff80003c443d90,ffff80003c443ce0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c443d90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c443d90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71bb995c1d10, 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 *119413 16406 0 0 0 1 syz-executor 405727 80246 0 0x2 0x1 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7e37dfcaca80, 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(0xfffffd807a58f3d8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7e37dfcaca80, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4696d0 rbx 0 rdx 0 rcx 0xffff80002a32f7a8 rax 0x2a r8 0xffff80003c469600 r9 0x1 r10 0xc5fbbadcb60375fc r11 0x2b7b93bd15bf89a r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8189c4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c469650 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=119413 pid=16406 tcnt=2 stat=onproc flags process=0 proc=0 runpri=84, usrpri=85, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000368187e8,0xffff80002a2c9780 process=0xffff800032c60510 user=0xffff80003c464000, vmspace=0xfffffd807a58fb78 estcpu=35, cpticks=5, pctcpu=0.3, user=2, sys=3, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9578 71591 4868 0 2 0 syz-executor 9578 455031 4868 0 2 0x4000000 syz-executor 92740 429106 21722 0 2 0 syz-executor 92740 7309 21722 0 2 0x4000000 syz-executor 38347 456846 24273 0 2 0 syz-executor 38347 221746 24273 0 3 0x4000080 fsleep syz-executor *16406 119413 23635 0 7 0 syz-executor 16406 27998 23635 0 3 0x4000080 sbwait syz-executor 4156 95486 28295 0 3 0x3000 suspend syz-executor 4156 217280 28295 0 3 0x4081000 biowait syz-executor 62551 41921 17000 0 3 0x3000 suspend syz-executor 62551 120218 17000 0 3 0x4081000 biowait syz-executor 47795 308709 1 0 3 0x100083 ttyin getty 28295 263179 37504 0 3 0x82 nanoslp syz-executor 80246 405727 37504 0 7 0x3 syz-executor 24273 184367 37504 0 3 0x82 nanoslp syz-executor 4868 83803 37504 0 3 0x82 nanoslp syz-executor 17000 394494 37504 0 3 0x82 nanoslp syz-executor 35723 169322 37504 0 2 0x3 syz-executor 21722 459336 37504 0 3 0x82 nanoslp syz-executor 23635 191626 37504 0 3 0x82 nanoslp syz-executor 92009 242857 0 0 3 0x14200 bored sosplice 37504 467318 75507 0 3 0x82 kqread syz-executor 75507 314279 92761 0 3 0x10008a sigsusp ksh 92761 3447 69518 0 3 0x98 kqread sshd-session 69518 292265 72346 0 3 0x92 kqread sshd-session 72346 366721 1 0 3 0x88 kqread sshd 911 355871 73943 74 3 0x1100092 bpf pflogd 73943 183831 1 0 3 0x80 sbwait pflogd 42564 510578 21933 73 3 0x1100090 kqread syslogd 21933 238918 1 0 3 0x100082 sbwait syslogd 35694 95430 1 0 3 0x100080 kqread resolvd 28009 400059 0 0 3 0x14200 bored smr 55984 426351 0 0 3 0x14200 pgzero zerothread 18597 395041 0 0 3 0x14200 aiodoned aiodoned 49136 158469 0 0 3 0x14200 syncer update 53105 433769 0 0 3 0x14200 cleaner cleaner 4397 231412 0 0 3 0x14200 reaper reaper 47924 502727 0 0 3 0x14200 pgdaemon pagedaemon 92275 369703 0 0 3 0x14200 bored viomb 59921 196487 0 0 3 0x40014200 acpi0 acpi0 42196 273734 0 0 3 0x40014200 idle1 33855 296298 0 0 3 0x14200 bored softnet7 75245 377153 0 0 3 0x14200 bored softnet6 58888 358252 0 0 3 0x14200 bored softnet5 66721 39432 0 0 3 0x14200 bored softnet4 90625 383489 0 0 3 0x14200 bored softnet3 33994 459319 0 0 3 0x14200 bored softnet2 74325 436367 0 0 3 0x14200 bored softnet1 32496 401527 0 0 3 0x14200 netlock softnet0 83428 33593 0 0 2 0x40014200 systqmp 21316 327143 0 0 3 0x14200 bored systq 99497 460760 0 0 3 0x14200 tmoslp softclockmp 15788 425570 0 0 3 0x40014200 tmoslp softclock 28560 173170 0 0 3 0x40014200 idle0 1 147295 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 9578 (syz-executor) thread 0xffff800036818a80 (455031) Process 4156 (syz-executor) thread 0xffff8000ffff3a00 (217280) Process 62551 (syz-executor) thread 0xffff80002a32e818 (120218) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10267 11108K 12519K 166960K 21146 0 pcb 18 18K 32K 166960K 3306 0 rtable 199 15K 16K 166960K 2870 0 pf 48 20K 67488K 166960K 1339 0 ifaddr 44 11K 13K 166960K 746 0 ifgroup 70 2K 3K 166960K 1467 0 sysctl 4 1K 9K 166960K 168 0 counters 74 37K 38K 166960K 1610 0 ioctlops 0 0K 8K 166960K 4106 0 iov 0 0K 48K 166960K 1042 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1574 99K 100K 166960K 11858 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 36K 37K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 29 108K 216K 166960K 284 0 dirhash 12 2K 3K 166960K 231 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 13048 0 sigio 0 0K 0K 166960K 628 0 proc 66 83K 180K 166960K 2731 0 subproc 72 4K 4K 166960K 366 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 2349 0 in_multi 54 3K 7K 166960K 991 0 ether_multi 1 0K 0K 166960K 157 0 mrt 1 0K 0K 166960K 86 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 3102 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 24 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 253 139K 189K 166960K 114475 0 UVM aobj 210 12K 12K 166960K 225 0 pinsyscall 37 74K 104K 166960K 14937 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 865 0 NDP 15 0K 1K 166960K 563 0 temp 109 8652K 8908K 166960K 686167 0 kqueue 7 12K 33K 166960K 2483 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 1770 0 1767 16 15 1 3 0 8 0 rtentry 176 971 0 910 5 0 5 5 0 8 0 unpcb 144 10292 0 10280 53 52 1 8 0 8 0 syncache 336 14 0 14 7 7 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 5147 0 5140 70 69 1 8 0 8 0 arp 128 164 0 150 1 0 1 1 0 8 0 inpcb 328 16655 0 16646 91 84 7 13 0 8 5 nd6 144 153 0 145 1 0 1 1 0 8 0 pkpcb 40 254 0 254 15 14 1 1 0 8 1 kcovpl 48 40 0 32 1 0 1 1 0 8 0 mppekey 1024 6 0 6 5 5 0 1 0 8 0 ppxss 1192 590 0 590 6 5 1 1 0 8 1 pppxif 1504 54 0 54 13 13 0 1 0 8 0 pfstscr 40 44 0 40 1 0 1 1 0 8 0 pffrag 232 97 0 70 3 1 2 2 0 482 0 pffrnode 88 73 0 51 1 0 1 1 0 8 0 pffrent 40 246 0 218 1 0 1 1 0 8 0 pfosfp 40 1431 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1431 0 714 21 0 21 21 0 8 0 pfrktable 1344 16 0 16 10 9 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 898 0 660 2 0 2 2 0 8 0 pfstkey 128 1032 0 792 8 0 8 8 0 8 0 pfstate 384 959 0 725 26 1 25 25 0 8 0 pfrule 1344 35 0 30 2 1 1 2 0 8 0 rttmr 136 17 0 17 11 11 0 1 0 8 0 art_heap8 4096 11 0 5 10 4 6 6 0 8 0 art_heap4 256 3827 0 3581 58 31 27 31 0 8 1 art_table 40 3838 0 3586 7 2 5 5 0 8 0 art_node 32 952 0 902 3 1 2 3 0 8 0 sysvmsgpl 40 11 0 9 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 271 0 244 1 0 1 1 0 8 0 shmpl 112 222 0 15 6 0 6 6 0 8 0 dirhash 1024 164 0 147 3 0 3 3 0 8 0 dino2pl 256 26905 0 25294 103 1 102 102 0 8 0 ffsino 296 26905 0 25294 126 1 125 125 0 8 0 nchpl 144 45048 0 44426 65 37 28 65 0 8 0 rtmask 32 86 0 86 20 19 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 168764 0 168763 10 9 1 2 0 8 0 percpumem 16 820 0 768 1 0 1 1 0 8 0 kstatmem 264 956 0 920 5 2 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 60 0 60 19 19 0 1 0 8 0 scxspl 216 307317 0 307315 44 43 1 8 1 8 0 plimitpl 152 3765 0 3747 1 0 1 1 0 8 0 sigapl 424 13305 0 13253 11 4 7 9 0 8 0 knotepl 120 841 0 0 22 0 22 22 0 8 0 kqueuepl 224 5287 0 5281 39 38 1 7 0 8 0 pipepl 344 2267 0 2240 52 49 3 9 0 8 0 fdescpl 528 13191 0 13162 3 0 3 3 0 8 0 filepl 160 103377 0 103172 79 64 15 21 0 8 2 lockfpl 104 6992 0 6991 10 9 1 2 0 8 0 lockfspl 48 2070 0 2069 1 0 1 1 0 8 0 sessionpl 144 61 0 53 1 0 1 1 0 8 0 pgrppl 48 595 0 579 1 0 1 1 0 8 0 ucredpl 104 18758 0 18747 1 0 1 1 0 8 0 zombiepl 144 14078 0 14074 1 0 1 1 0 8 0 processpl 1248 13305 0 13253 7 1 6 6 0 8 0 procpl 664 34394 0 34336 12 5 7 8 0 8 0 srpgc 96 1 0 1 1 1 0 1 0 8 0 sosppl 168 79 0 79 16 16 0 1 0 8 0 sockpl 752 29660 0 29636 206 196 10 27 0 8 7 mcl64k 65536 37 0 0 5 2 3 4 0 8 0 mcl16k 16384 7 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 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 137 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 190 0 0 11 3 8 11 0 8 0 mtagpl 96 151 0 0 4 0 4 4 0 8 0 mbufpl 256 1402 0 0 82 0 82 82 0 8 0 bufpl 280 130483 0 124334 441 1 440 440 0 8 0 anonpl 32 22247 0 0 180 1 179 179 0 246 0 amapchunkpl 152 409383 0 408554 123 89 34 42 0 158 0 amappl16 200 43774 0 43097 206 166 40 52 0 8 1 amappl15 192 37 0 37 4 4 0 1 0 8 0 amappl14 184 190 0 181 1 0 1 1 0 8 0 amappl13 176 10 0 9 1 0 1 1 0 8 0 amappl12 168 14374 0 14345 3 1 2 2 0 8 0 amappl11 160 55 0 47 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 183 0 173 1 0 1 1 0 8 0 amappl6 120 507 0 503 1 0 1 1 0 8 0 amappl5 112 253 0 244 1 0 1 1 0 8 0 amappl4 104 376 0 356 1 0 1 1 0 8 0 amappl3 96 86763 0 86646 5 1 4 4 0 8 0 amappl2 88 1399 0 1348 2 0 2 2 0 8 0 amappl1 80 63102 0 62594 16 1 15 16 0 8 0 amappl 88 110976 0 110781 5 0 5 5 0 92 0 dma32768 32768 2 0 2 2 2 0 1 0 8 0 dma16384 16384 2 0 2 2 2 0 1 0 8 0 dma8192 8192 3 0 3 3 3 0 1 0 8 0 dma4096 4096 3 0 3 3 3 0 1 0 8 0 dma2048 2048 4 0 4 3 3 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 15 0 15 7 7 0 1 0 8 0 dma128 128 282 0 282 21 21 0 1 0 8 0 dma64 64 12 0 12 7 7 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 22 0 21 1 0 1 1 0 8 0 aobjpl 72 224 0 15 4 0 4 4 0 8 0 uaddrrnd 24 13191 0 13162 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 13191 0 13162 1 0 1 1 0 8 0 vmmpekpl 168 87128 0 87060 4 0 4 4 0 8 0 vmmpepl 168 819751 0 817308 202 91 111 124 0 357 0 vmsppl 488 13190 0 13162 5 0 5 5 0 8 0 rwobjpl 80 196404 0 188775 190 32 158 163 0 8 0 pdppl 4096 26390 0 26324 182 116 66 88 0 8 0 pvpl 32 31602 0 0 256 2 254 254 0 265 0 pmappl 256 13190 0 13162 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 589 0 268 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83785ff0) 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(ffffffff83889598) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83889598) 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(ffffffff83889598) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83889598) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3dd140,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83889598) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83889598) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsyscall(ffff800036819a10,b,20,ffff80002a3dd3f0) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff800036819a10,b,20,ffff80002a3dd3f0) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a3dd3f0) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a3dd3f0) at syscall+0x304 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71bb995c1d10, count: 1 ddb{0}> trace x86_ipi_db(ffffffff83785ff0) 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(ffffffff83889598) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83889598) 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(ffffffff83889598) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83889598) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3dd140,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83889598) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83889598) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsyscall(ffff800036819a10,b,20,ffff80002a3dd3f0) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff800036819a10,b,20,ffff80002a3dd3f0) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a3dd3f0) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a3dd3f0) at syscall+0x304 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71bb995c1d10, count: -14 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: 0x7e37dfcaca80, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7e37dfcaca80, count: -1