uvm_fault(0xfffffd800f7b97c0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82fa0058 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c431900 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82fa0058 Starting stack trace... panic(ffffffff833d70d5) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c431850) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001491000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffe22c0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe22c0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c431a00) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a2f50f8,81,fffffd80097fd680,ffff8000fffe22c0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806ac70a50,ffff8000fffe22c0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806ac70a50,ffff8000fffe22c0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806ac70a50,ffff8000fffe22c0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806ac70a50,ffff8000fffe22c0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe22c0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe22c0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe22c0,ffff80003c431d70,ffff80003c431cc0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c431d70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c431d70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71e721176fd0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 1997380472 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 38859 34260 0 0 0 1 syz-executor 441457 88698 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x6fb7770d9b60, 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(0xfffffd800f7b97c0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x6fb7770d9b60, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c404c00 rbx 0 rdx 0 rcx 0xffff8000fffd6d30 rax 0x3b r8 0xffff80003c404b30 r9 0x1 r10 0x395f61fe0d0e2dc r11 0xcdf892dd172656bc r12 0 r13 0 r14 0xffff8000fffd6d30 r15 0 rip 0xffffffff827fd3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c404b80 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=38859 pid=34260 tcnt=3 stat=onproc flags process=0 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe3250,0xffff8000fffd7270 process=0xffff8000fffef508 user=0xffff80003c3ff000, vmspace=0xfffffd800f7b99a8 estcpu=36, cpticks=10, pctcpu=0.0, user=10, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 64723 509960 63999 0 2 0 syz-executor 25305 433972 3323 0 2 0 syz-executor 25305 123421 3323 0 2 0x4000000 syz-executor 44421 179566 41022 0 2 0 syz-executor 44421 456100 41022 0 3 0x4000080 bell syz-executor *34260 38859 48755 0 7 0 syz-executor 34260 100866 48755 0 3 0x4000080 ttyout syz-executor 34260 167777 48755 0 3 0x4000080 fsleep syz-executor 24472 340382 0 0 3 0x14200 acct acct 48755 108264 60275 0 2 0xc82 syz-executor 70647 439777 60275 0 3 0x82 wait syz-executor 63999 475314 60275 0 2 0xc82 syz-executor 3323 409888 60275 0 2 0xc82 syz-executor 96822 211546 60275 0 2 0xc82 syz-executor 88698 441457 60275 0 7 0x2 syz-executor 41022 450115 60275 0 2 0xc82 syz-executor 8214 281025 60275 0 3 0x82 wait syz-executor 60275 414335 58113 0 2 0x2 syz-executor 58113 299270 8328 0 3 0x10008a sigsusp ksh 8328 320891 76083 0 3 0x98 kqread sshd-session 76083 41984 70941 0 3 0x92 kqread sshd-session 12111 115072 1 0 3 0x100083 ttyopn getty 70941 519531 1 0 3 0x88 kqread sshd 18339 59095 92007 74 3 0x1100092 bpf pflogd 92007 214665 1 0 3 0x80 sbwait pflogd 65968 422691 4319 73 3 0x1100090 kqread syslogd 4319 154197 1 0 3 0x100082 sbwait syslogd 41814 241366 1 0 3 0x100080 kqread resolvd 29154 166128 81425 77 3 0x100092 kqread dhcpleased 12829 8385 81425 77 3 0x100092 kqread dhcpleased 81425 189690 1 0 3 0x80 kqread dhcpleased 96221 122522 0 0 3 0x14200 bored smr 28225 215754 0 0 2 0x14200 zerothread 15894 235473 0 0 3 0x14200 aiodoned aiodoned 49671 175148 0 0 3 0x14200 syncer update 89379 518461 0 0 3 0x14200 cleaner cleaner 2243 396518 0 0 3 0x14200 reaper reaper 51898 44679 0 0 3 0x14200 pgdaemon pagedaemon 89262 81950 0 0 3 0x14200 bored viomb 30063 284642 0 0 3 0x40014200 acpi0 acpi0 50229 156411 0 0 3 0x40014200 idle1 24150 281771 0 0 3 0x14200 bored softnet1 13958 486432 0 0 3 0x14200 netlock softnet0 98100 331369 0 0 2 0x40014200 systqmp 81075 375315 0 0 3 0x14200 bored systq 9877 249674 0 0 2 0x14200 softclockmp 87778 443461 0 0 3 0x40014200 tmoslp softclock 40505 310774 0 0 3 0x40014200 idle0 1 343689 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 10216 11070K 11503K 166960K 12266 0 pcb 17 14K 16K 166960K 166 0 rtable 144 7K 9K 166960K 425 0 pf 32 17K 19K 166960K 85 0 ifaddr 29 4K 7K 166960K 65 0 ifgroup 51 2K 2K 166960K 95 0 sysctl 3 1K 9K 166960K 8 0 counters 66 36K 38K 166960K 120 0 ioctlops 0 0K 4K 166960K 1681 0 iov 0 0K 24K 166960K 22 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1433 90K 91K 166960K 2010 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 526 0 sigio 0 0K 0K 166960K 6 0 proc 72 115K 163K 166960K 553 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 55 0 in_multi 51 3K 7K 166960K 114 0 ether_multi 1 0K 0K 166960K 3 0 mrt 2 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 410 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 231 159K 175K 166960K 6582 0 UVM aobj 9 4K 6K 166960K 10 0 pinsyscall 42 84K 104K 166960K 1653 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 22 0 NDP 11 0K 2K 166960K 44 0 temp 75 8672K 8742K 166960K 16836 0 kqueue 14 22K 28K 166960K 116 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 96 0 93 1 0 1 1 0 8 0 rtentry 176 122 0 69 5 0 5 5 0 8 0 unpcb 144 244 0 225 2 0 2 2 0 8 1 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 131 0 125 4 2 2 4 0 8 1 arp 136 20 0 9 1 0 1 1 0 8 0 inpcb 328 559 0 548 7 0 7 7 0 8 5 nd6 152 27 0 15 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 23 0 23 1 0 1 1 0 8 1 pffrag 232 4 0 0 1 0 1 1 0 482 0 pffrnode 88 4 0 0 1 0 1 1 0 8 0 pffrent 40 4 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 48 0 1 1 0 1 1 0 8 0 pfstkey 128 48 0 1 2 0 2 2 0 8 0 pfstate 448 48 0 1 6 0 6 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 497 0 242 30 1 29 30 0 8 5 art_table 40 499 0 242 5 0 5 5 0 8 0 art_node 32 122 0 74 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2385 0 878 96 0 96 96 0 8 0 ffsino 296 2385 0 878 118 0 118 118 0 8 0 nchpl 144 3105 0 1405 64 0 64 64 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 vnodes 216 2898 0 0 161 0 161 161 0 8 0 namei 1024 10202 0 10202 1 0 1 1 0 8 1 percpumem 16 75 0 27 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 840 2 0 1 1 0 1 1 0 8 0 kstatmem 264 60 0 34 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 12450 0 12450 10 2 8 8 1 8 8 plimitpl 152 180 0 161 1 0 1 1 0 8 0 sigapl 424 857 0 809 8 2 6 8 0 8 0 knotepl 120 517 0 0 16 0 16 16 0 8 0 kqueuepl 224 164 0 154 2 0 2 2 0 8 1 pipepl 344 155 0 126 3 0 3 3 0 8 0 fdescpl 528 819 0 788 3 0 3 3 0 8 0 filepl 160 4652 0 4415 20 1 19 20 0 8 7 lockfpl 104 234 0 232 1 0 1 1 0 8 0 lockfspl 48 110 0 108 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 622 0 609 1 0 1 1 0 8 0 zombiepl 144 812 0 809 1 0 1 1 0 8 0 processpl 1232 857 0 809 6 1 5 6 0 8 1 procpl 664 1551 0 1499 8 2 6 8 0 8 0 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 752 916 0 883 11 1 10 11 0 8 6 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 132 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 28 0 0 1 0 1 1 0 8 0 mbufpl 256 235 0 0 15 0 15 15 0 8 0 bufpl 280 4401 0 134 305 0 305 305 0 8 0 anonpl 32 9559 0 0 79 1 78 78 0 246 0 amapchunkpl 152 21270 0 20820 33 0 33 33 0 158 10 amappl16 200 3527 0 3496 25 11 14 17 0 8 10 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 7 0 6 1 0 1 1 0 8 0 amappl13 176 426 0 425 1 0 1 1 0 8 0 amappl12 168 1177 0 1136 3 0 3 3 0 8 0 amappl11 160 41 0 41 1 1 0 1 0 8 0 amappl10 152 49 0 35 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 79 0 78 1 0 1 1 0 8 0 amappl6 120 278 0 263 1 0 1 1 0 8 0 amappl5 112 75 0 64 1 0 1 1 0 8 0 amappl4 104 415 0 386 1 0 1 1 0 8 0 amappl3 96 3581 0 3496 4 1 3 3 0 8 0 amappl2 88 927 0 852 2 0 2 2 0 8 0 amappl1 80 10681 0 10090 14 1 13 14 0 8 0 amappl 88 5793 0 5639 5 0 5 5 0 92 0 uvmvnodes 80 111 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 128 254 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 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 820 0 789 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 820 0 789 1 0 1 1 0 8 0 vmmpekpl 168 8384 0 8349 2 0 2 2 0 8 0 vmmpepl 168 59248 0 57344 101 1 100 100 0 357 8 vmsppl 488 819 0 789 5 1 4 5 0 8 0 rwobjpl 80 19033 0 17998 28 0 28 28 0 8 2 pdppl 4096 1651 0 1581 100 28 72 87 0 8 2 pvpl 32 17875 0 0 145 0 145 145 0 265 0 pmappl 256 821 0 790 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 290 0 34 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8382fff0) 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(ffffffff838ea180) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838ea180) at __mp_lock+0x19e 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 __mp_lock(ffffffff838ea180) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838ea180) at __mp_lock+0x199 sys/kern/kern_lock.c:173 dofstatat(ffff80002a272a70,ffffff9c,7c3ae81bb310,7c3ae81bb710,2) at dofstatat+0xe1 sys/kern/vfs_syscalls.c:2086 syscall(ffff80002a338a20) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a338a20) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c3ae81bb7c0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff8382fff0) 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(ffffffff838ea180) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838ea180) at __mp_lock+0x19e 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 __mp_lock(ffffffff838ea180) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838ea180) at __mp_lock+0x199 sys/kern/kern_lock.c:173 dofstatat(ffff80002a272a70,ffffff9c,7c3ae81bb310,7c3ae81bb710,2) at dofstatat+0xe1 sys/kern/vfs_syscalls.c:2086 syscall(ffff80002a338a20) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a338a20) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c3ae81bb7c0, 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: 0x6fb7770d9b60, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x6fb7770d9b60, count: -1