uvm_fault(0xfffffd806ec44d68, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff832f5a78 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c45e450 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff832f5a78 Starting stack trace... panic(ffffffff833deb92) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c45e3a0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000155c000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff800037ffe2c0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800037ffe2c0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c45e550) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806ca06b48,81,fffffd80097fd270,ffff800037ffe2c0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806cafd900,ffff800037ffe2c0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806cafd900,ffff800037ffe2c0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806cafd900,ffff800037ffe2c0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806cafd900,ffff800037ffe2c0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800037ffe2c0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800037ffe2c0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800037ffe2c0,ffff80003c45e8c0,ffff80003c45e810) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c45e8c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45e8c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ec878b45d10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 1659809016 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *473099 65744 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7d6f62eeace0, 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(0xfffffd806ec44d68, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7d6f62eeace0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c464ba0 rbx 0 rdx 0 rcx 0xffff800037ffed20 rax 0x3b r8 0xffff80003c464ad0 r9 0x1 r10 0xa0cd4a1c1b9c53ba r11 0xc43731fd2e780d05 r12 0 r13 0 r14 0xffff800037ffed20 r15 0 rip 0xffffffff81eee3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c464b20 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=473099 pid=65744 tcnt=1 stat=onproc flags process=2 proc=0 runpri=84, usrpri=85, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a27a7e0,0xffff80002a27a558 process=0xffff8000ffff6b58 user=0xffff80003c45f000, vmspace=0xfffffd806c827d88 estcpu=35, cpticks=110, pctcpu=0.0, user=6, sys=103, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47356 15499 99188 0 2 0x10 syz-executor 47356 715 99188 0 3 0x4000090 fsleep syz-executor 79130 36939 65744 0 3 0x80 nanoslp syz-executor 79130 521803 65744 0 3 0x4000080 kqsel syz-executor 79130 462843 65744 0 3 0x4000080 fsleep syz-executor 50609 238765 77435 0 3 0x80 nanoslp syz-executor 50609 360525 77435 0 3 0x4000080 ttyin syz-executor 50609 90628 77435 0 3 0x4000080 fsleep syz-executor 50609 476621 77435 0 3 0x4000080 fsleep syz-executor 32184 85753 37045 0 3 0x3000 suspend syz-executor 32184 368228 37045 0 3 0x4081000 biowait syz-executor 32184 457737 37045 0 3 0x4081000 inode syz-executor 15423 375241 0 0 3 0x14200 acct acct 71875 346217 29359 0 3 0x82 nanoslp syz-executor 89724 150379 1 0 3 0x100083 ttyin getty 77435 212922 29359 0 3 0x82 nanoslp syz-executor 30174 500107 29359 0 3 0x82 nanoslp syz-executor 99188 38754 29359 0 3 0x82 nanoslp syz-executor 84197 3077 29359 0 3 0x82 nanoslp syz-executor 37045 387119 29359 0 3 0x82 nanoslp syz-executor 5554 501062 84750 0 3 0x82 sbwait sshd-session 41597 465477 29359 0 3 0x82 wait syz-executor *65744 473099 29359 0 7 0x2 syz-executor 29359 332816 65040 0 3 0x82 kqread syz-executor 65040 182808 72198 0 3 0x10008a sigsusp ksh 72198 425200 38631 0 3 0x98 kqread sshd-session 38631 189713 84750 0 3 0x92 kqread sshd-session 84750 183835 1 0 3 0x88 kqread sshd 55719 73582 78212 74 3 0x1100092 bpf pflogd 78212 439076 1 0 3 0x80 sbwait pflogd 96489 455867 53952 73 3 0x1100090 kqread syslogd 53952 394997 1 0 3 0x100082 sbwait syslogd 11541 140313 1 0 3 0x100080 kqread resolvd 61202 285570 0 0 3 0x14200 bored smr 96288 423933 0 0 2 0x14200 zerothread 33422 423637 0 0 3 0x14200 aiodoned aiodoned 85607 111535 0 0 3 0x14200 syncer update 66288 258998 0 0 3 0x14200 cleaner cleaner 98786 147890 0 0 3 0x14200 reaper reaper 40937 260307 0 0 3 0x14200 pgdaemon pagedaemon 93272 329408 0 0 3 0x14200 bored viomb 79369 114229 0 0 3 0x40014200 acpi0 acpi0 95735 252716 0 0 3 0x40014200 idle1 95096 500040 0 0 3 0x14200 bored softnet1 35041 414171 0 0 3 0x14200 netlock softnet0 38043 205999 0 0 2 0x40014200 systqmp 74348 256326 0 0 3 0x14200 bored systq 8713 18277 0 0 3 0x14200 tmoslp softclockmp 7271 507619 0 0 3 0x40014200 tmoslp softclock 81136 81782 0 0 3 0x40014200 idle0 1 142644 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 32184 (syz-executor) thread 0xffff800037fffa18 (368228) Process 32184 (syz-executor) thread 0xffff80002a27ba08 (457737) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10264 11109K 12597K 166960K 20565 0 pcb 18 18K 34K 166960K 3009 0 rtable 291 17K 18K 166960K 2745 0 pf 41 18K 81K 166960K 1076 0 ifaddr 44 11K 12K 166960K 632 0 ifgroup 64 2K 3K 166960K 1219 0 sysctl 4 1K 9K 166960K 127 0 counters 72 37K 38K 166960K 1858 0 ioctlops 0 0K 5K 166960K 4644 0 iov 0 0K 28K 166960K 939 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1545 97K 98K 166960K 9990 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 9K 166960K 50 0 VM map 2 1K 1K 166960K 2 0 sem 20 136K 137K 166960K 79 0 dirhash 12 2K 3K 166960K 222 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 10659 0 sigio 1 0K 0K 166960K 474 0 proc 68 83K 196K 166960K 2536 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 1 0K 0K 166960K 1612 0 in_multi 89 6K 7K 166960K 806 0 ether_multi 1 0K 0K 166960K 124 0 mrt 1 0K 0K 166960K 74 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 325 1447K 1447K 166960K 325 0 exec 0 0K 1K 166960K 3336 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 17 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 247 162K 207K 166960K 96049 0 UVM aobj 23 6K 6K 166960K 25 0 pinsyscall 38 76K 104K 166960K 12786 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 1066 0 NDP 14 0K 1K 166960K 483 0 temp 88 8680K 8936K 166960K 635302 0 kqueue 7 12K 33K 166960K 1994 0 SYN cache 2 0K 16K 166960K 4 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 1076 0 1075 8 7 1 3 0 8 0 rtentry 176 906 0 799 6 0 6 6 0 8 0 unpcb 144 8260 0 8248 54 53 1 6 0 8 0 syncache 336 53 0 53 23 23 0 1 0 8 0 tcpqe 32 32 0 32 17 17 0 1 0 8 0 tcpcb 736 3709 0 3698 82 80 2 13 0 8 0 arp 136 161 0 142 1 0 1 1 0 8 0 inpcb 328 12947 0 12933 117 110 7 13 0 8 4 nd6 152 153 0 126 3 1 2 2 0 8 0 pkpcb 40 74 0 74 24 23 1 1 0 8 1 kcovpl 48 40 0 32 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 2 0 1 0 8 0 ppxss 1192 748 0 747 10 9 1 1 0 8 0 pppxif 1504 60 0 60 20 19 1 1 0 8 1 pffrag 232 109 0 94 3 2 1 2 0 482 0 pffrnode 88 78 0 64 1 0 1 1 0 8 0 pffrent 40 220 0 205 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 43 0 43 8 8 0 1 0 8 0 pfstitem 24 717 0 597 2 0 2 2 0 8 0 pfstkey 128 717 0 597 7 3 4 6 0 8 0 pfstate 448 717 0 597 26 12 14 19 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 11 0 11 9 9 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 3445 0 2988 61 27 34 34 0 8 0 art_table 40 3450 0 2988 7 1 6 6 0 8 0 art_node 32 894 0 799 2 0 2 2 0 8 0 sysvmsgpl 40 43 0 32 1 0 1 1 0 8 0 semupl 112 4 0 4 3 3 0 1 0 8 0 semapl 112 74 0 56 1 0 1 1 0 8 0 shmpl 112 20 0 2 1 0 1 1 0 8 0 dirhash 1024 159 0 142 3 0 3 3 0 8 0 dino2pl 256 21789 0 20188 101 0 101 101 0 8 0 ffsino 296 21789 0 20188 124 0 124 124 0 8 0 nchpl 144 36670 0 36017 65 38 27 65 0 8 0 rtmask 32 78 0 78 21 20 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 139912 0 139911 16 15 1 3 0 8 0 percpumem 16 944 0 893 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 840 2 0 0 1 0 1 1 0 8 0 kstatmem 264 804 0 772 9 6 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 47 0 47 24 24 0 1 0 8 0 scxspl 216 190720 0 190719 28 27 1 8 1 8 0 plimitpl 152 3023 0 3005 1 0 1 1 0 8 0 sigapl 424 10913 0 10866 10 3 7 8 0 8 0 knotepl 120 994 0 0 25 0 25 25 0 8 0 kqueuepl 224 4876 0 4868 59 58 1 9 0 8 0 pipepl 344 2089 0 2061 58 55 3 9 0 8 0 fdescpl 528 10837 0 10808 3 0 3 3 0 8 0 filepl 160 85168 0 84950 116 102 14 24 0 8 1 lockfpl 104 4957 0 4956 8 7 1 2 0 8 0 lockfspl 48 1713 0 1712 1 0 1 1 0 8 0 sessionpl 144 105 0 96 1 0 1 1 0 8 0 pgrppl 48 662 0 645 1 0 1 1 0 8 0 ucredpl 104 14449 0 14438 1 0 1 1 0 8 0 zombiepl 144 14611 0 14606 4 3 1 1 0 8 0 processpl 1232 10913 0 10866 8 4 4 6 0 8 0 procpl 664 28412 0 28357 9 3 6 7 0 8 0 sosppl 176 77 0 77 22 21 1 1 0 8 1 sockpl 752 22904 0 22877 200 190 10 25 0 8 3 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 8 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 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 152 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 135 0 0 8 2 6 7 0 8 0 mtagpl 96 28 0 0 1 0 1 1 0 8 0 mbufpl 256 1969 0 0 116 0 116 116 0 8 0 bufpl 280 70699 0 64562 439 0 439 439 0 8 0 anonpl 32 21839 0 0 173 0 173 173 0 246 0 amapchunkpl 152 364086 0 363447 180 144 36 40 0 158 4 amappl16 200 31039 0 30291 184 131 53 53 0 8 8 amappl15 192 7 0 7 3 3 0 1 0 8 0 amappl14 184 14 0 13 1 0 1 1 0 8 0 amappl13 176 824 0 821 1 0 1 1 0 8 0 amappl12 168 11544 0 11505 4 1 3 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 48 0 39 1 0 1 1 0 8 0 amappl9 144 256 0 256 2 2 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 214 0 212 1 0 1 1 0 8 0 amappl6 120 723 0 710 1 0 1 1 0 8 0 amappl5 112 134 0 124 1 0 1 1 0 8 0 amappl4 104 849 0 821 1 0 1 1 0 8 0 amappl3 96 61638 0 61546 3 0 3 3 0 8 0 amappl2 88 11241 0 11172 4 1 3 3 0 8 0 amappl1 80 66596 0 66010 19 3 16 16 0 8 0 amappl 88 92693 0 92514 5 0 5 5 0 92 0 uvmvnodes 80 286 0 0 6 0 6 6 0 8 0 dma65536 65536 2 0 2 2 2 0 1 0 8 0 dma16384 16384 2 0 2 2 2 0 1 0 8 0 dma8192 8192 2 0 2 2 2 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 5 0 4 1 0 1 1 0 8 0 dma512 512 6 0 6 3 2 1 1 0 8 1 dma256 256 10 0 10 5 5 0 1 0 8 0 dma128 128 267 0 267 10 10 0 1 0 8 0 dma64 64 9 0 9 4 4 0 1 0 8 0 dma32 32 9 0 9 3 3 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 24 0 2 1 0 1 1 0 8 0 uaddrrnd 24 10837 0 10807 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10837 0 10807 1 0 1 1 0 8 0 vmmpekpl 168 75152 0 75085 5 1 4 4 0 8 0 vmmpepl 168 693035 0 690415 232 106 126 136 0 357 1 vmsppl 488 10836 0 10807 8 3 5 5 0 8 0 rwobjpl 80 168628 0 166686 75 30 45 47 0 8 1 pdppl 4096 21685 0 21616 222 153 69 83 0 8 0 pvpl 32 29700 0 0 237 1 236 236 0 265 0 pmappl 256 10838 0 10807 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 705 0 329 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8380fff0) 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(ffffffff83a09a20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a09a20) 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:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83a09a20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a09a20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a34df20,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f wakeup_n(fffffd800861bc80,1) at wakeup_n+0x35f sys/kern/kern_synch.c:606 pmap_do_remove(fffffd806ec43e00,3325d0d3000,3325d0d6000,0) at pmap_do_remove+0x89f sys/arch/amd64/amd64/pmap.c:1939 uvm_unmap_kill_entry_withlock(fffffd806ec44b80,fffffd80668d1d40,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 uvm_map_teardown(fffffd806ec44b80) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806ec44b80) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 end trace frame: 0xffff80002a34e240, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8380fff0) 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(ffffffff83a09a20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a09a20) 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:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83a09a20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a09a20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a34df20,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f wakeup_n(fffffd800861bc80,1) at wakeup_n+0x35f sys/kern/kern_synch.c:606 pmap_do_remove(fffffd806ec43e00,3325d0d3000,3325d0d6000,0) at pmap_do_remove+0x89f sys/arch/amd64/amd64/pmap.c:1939 uvm_unmap_kill_entry_withlock(fffffd806ec44b80,fffffd80668d1d40,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 uvm_map_teardown(fffffd806ec44b80) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806ec44b80) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 exit1(ffff80002a27b240,b,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80002a27b240,ffff80002a34e350,ffff80002a34e2a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a34e350) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a34e350) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f8268c65630, count: -18 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7d6f62eeace0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7d6f62eeace0, count: -1