uvm_fault(0xffffffff838fef28, 0xffff80002a3cb630, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff8144182b cs 8 rflags 10297 cr2 ffff80002a3cb630 cpl 0 rsp ffff80003c431570 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff8144182b Starting stack trace... panic(ffffffff833a070a) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c4314c0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b mtx_enter_try(ffff80002a3cb628) at mtx_enter_try+0x7b sys/kern/kern_lock.c:290 mtx_enter(ffff80002a3cb628) at mtx_enter+0x62 sys/kern/kern_lock.c:261 filt_procdetach(fffffd806b8d1878) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff8000fffeed10,fffffd806eebbc40,fffffd806eebbce0,12,1) at knote_remove+0x2db sys/kern/kern_event.c:-1 kqueue_purge(ffff8000fffeed10,fffffd806eebbc40) at kqueue_purge+0x137 sys/kern/kern_event.c:1890 kqueue_close(fffffd8067bd4040,ffff8000fffeed10) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd8067bd4040,ffff8000fffeed10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8067bd4040,ffff8000fffeed10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeed10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeed10,0,0,3) at exit1+0x576 sys/kern/kern_exit.c:215 proc_suspend_check_locked(ffff8000fffeed10,0) at proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235 userret(ffff8000fffeed10) at userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline] userret(ffff8000fffeed10) at userret+0x8c sys/kern/kern_sig.c:2194 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x7dc78b03e9c0, count: 241 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 11 20 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 450830 64126 0 0 0 0 syz-executor *286021 85883 0 0x10000002 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x754a565fed10, 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(0xffffffff838fef28, 0xffff80002a3cb630, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x754a565fed10, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a35e640 rbx 0 rdx 0 rcx 0xffff80003c4f22d0 rax 0x33 r8 0xffff80002a35e570 r9 0x1 r10 0xe99b7c1b272ce5f5 r11 0x8d8e801949bdb22 r12 0 r13 0 r14 0xffff80003c4f22d0 r15 0 rip 0xffffffff822973ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a35e5c0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=286021 pid=85883 tcnt=1 stat=onproc flags process=10000002 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4f3a28,0xffff80003c4f2d40 process=0xffff80002a3cc9b8 user=0xffff80002a359000, vmspace=0xfffffd806b98a018 estcpu=34, cpticks=11, pctcpu=0.2, user=0, sys=9, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38611 168047 27380 0 2 0x81000 syz-executor 38611 135082 27380 0 3 0x4003000 suspend syz-executor 64126 450830 41218 0 7 0 syz-executor 64126 168420 41218 0 3 0x4000080 fsleep syz-executor 90852 480158 54511 0 2 0x4081000 syz-executor 90852 439539 54511 0 3 0x4003000 suspend syz-executor 49207 104980 0 0 3 0x14200 acct acct 27380 389484 9105 0 3 0x82 wait syz-executor 93539 428060 9105 0 3 0x2 biowait syz-executor *85883 286021 9105 0 7 0x10000002 syz-executor 61223 51746 1 0 3 0x100083 ttyopn getty 41218 68240 9105 0 2 0x2 syz-executor 88561 471060 9105 0 2 0x2 syz-executor 54511 102373 9105 0 3 0x82 wait syz-executor 46767 84040 0 0 3 0x14200 bored sosplice 29964 310673 9105 0 2 0x2 syz-executor 5943 179827 9105 0 3 0x82 wait syz-executor 9105 95497 81795 0 3 0x82 kqread syz-executor 81795 195534 68625 0 3 0x10008a sigsusp ksh 68625 210656 5126 0 3 0x98 kqread sshd-session 5126 140328 3727 0 3 0x92 kqread sshd-session 3727 523062 1 0 3 0x88 kqread sshd 95377 486240 6855 74 3 0x1100092 bpf pflogd 6855 180100 1 0 3 0x80 sbwait pflogd 51487 261893 1293 73 3 0x1100090 kqread syslogd 1293 21972 1 0 3 0x100082 sbwait syslogd 1669 420196 1 0 3 0x100080 kqread resolvd 13000 182224 53505 77 3 0x100092 kqread dhcpleased 44384 340257 53505 77 3 0x100092 kqread dhcpleased 53505 354454 1 0 3 0x80 kqread dhcpleased 57378 242341 0 0 3 0x14200 bored smr 699 422360 0 0 2 0x14200 zerothread 49798 472888 0 0 3 0x14200 aiodoned aiodoned 34845 175892 0 0 3 0x14200 syncer update 68806 333895 0 0 3 0x14200 cleaner cleaner 78763 214786 0 0 3 0x14200 reaper reaper 27378 78926 0 0 3 0x14200 pgdaemon pagedaemon 43230 505310 0 0 3 0x14200 bored viomb 86138 128446 0 0 3 0x40014200 acpi0 acpi0 35698 356905 0 0 3 0x40014200 idle1 80310 56672 0 0 3 0x14200 bored softnet1 25531 475553 0 0 3 0x14200 netlock softnet0 3040 33954 0 0 2 0x40014200 systqmp 93588 363997 0 0 3 0x14200 bored systq 57174 227554 0 0 3 0x14200 tmoslp softclockmp 23241 66365 0 0 3 0x40014200 tmoslp softclock 77804 229963 0 0 3 0x40014200 idle0 1 205181 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 64126 (syz-executor) thread 0xffff8000393fa028 (450830) Process 93539 (syz-executor) thread 0xffff80003c4f2d30 (428060) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10231 11118K 12661K 166960K 16173 0 pcb 17 16K 18K 166960K 587 0 rtable 202 11K 12K 166960K 760 0 pf 34 17K 67485K 166960K 288 0 ifaddr 37 7K 8K 166960K 184 0 ifgroup 47 2K 2K 166960K 304 0 sysctl 4 1K 9K 166960K 29 0 counters 64 36K 38K 166960K 404 0 ioctlops 0 0K 4K 166960K 2144 0 iov 0 0K 24K 166960K 147 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1527 96K 97K 166960K 4337 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 25 11K 11K 166960K 101 0 dirhash 12 2K 2K 166960K 54 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 232K 166960K 2396 0 sigio 0 0K 0K 166960K 59 0 proc 73 115K 180K 166960K 1014 0 subproc 72 4K 4K 166960K 145 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 430 0 in_multi 78 5K 7K 166960K 266 0 ether_multi 2 0K 0K 166960K 12 0 mrt 2 0K 0K 166960K 15 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 952 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 213 167K 191K 166960K 22245 0 UVM aobj 114 8K 8K 166960K 122 0 pinsyscall 39 78K 103K 166960K 3705 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 290 0 NDP 10 0K 2K 166960K 133 0 temp 79 8652K 8741K 166960K 129418 0 kqueue 18 25K 34K 166960K 487 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 120 392 0 389 5 4 1 3 0 8 0 rtentry 176 240 0 164 5 0 5 5 0 8 0 unpcb 144 2384 0 2364 18 17 1 6 0 8 0 syncache 336 8 0 8 5 5 0 1 0 8 0 tcpqe 32 4 0 4 3 3 0 1 0 8 0 tcpcb 736 834 0 827 20 15 5 7 0 8 4 arp 136 30 0 17 1 0 1 1 0 8 0 inpcb 328 2582 0 2570 23 18 5 7 0 8 3 nd6 144 38 0 25 1 0 1 1 0 8 0 pkpcb 40 79 0 79 1 1 0 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 142 0 142 2 2 0 1 0 8 0 pppxif 1504 6 0 6 4 4 0 1 0 8 0 pfstscr 40 3 0 1 1 0 1 1 0 8 0 pffrag 232 23 0 18 1 0 1 1 0 482 0 pffrnode 88 20 0 15 1 0 1 1 0 8 0 pffrent 40 88 0 82 1 0 1 1 0 8 0 pfosfp 40 1429 0 1428 6 5 1 5 0 8 0 pfosfpen 112 1429 0 1428 22 21 1 21 0 8 0 pfanchor 1288 3 0 3 1 1 0 1 0 8 0 pftag 88 3 0 1 2 1 1 1 0 8 0 pfstitem 24 157 0 77 1 0 1 1 0 8 0 pfstkey 128 170 0 91 3 0 3 3 0 8 0 pfstate 384 161 0 84 9 0 9 9 0 8 0 pfrule 1344 39 0 34 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1222 0 862 40 11 29 31 0 8 0 art_table 40 1226 0 862 5 0 5 5 0 8 0 art_node 32 235 0 174 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 11 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 94 0 71 1 0 1 1 0 8 0 shmpl 112 119 0 8 4 0 4 4 0 8 0 dirhash 1024 45 0 28 3 0 3 3 0 8 0 dino2pl 256 6187 0 4670 96 0 96 96 0 8 0 ffsino 296 6187 0 4670 118 0 118 118 0 8 0 nchpl 144 9434 0 7727 64 0 64 64 0 8 0 rtmask 32 22 0 22 4 4 0 1 0 8 0 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 36406 0 36406 4 3 1 2 0 8 1 percpumem 16 217 0 170 1 0 1 1 0 8 0 kstatmem 264 204 0 182 5 3 2 3 0 8 0 scsiplug 72 12 0 12 5 5 0 1 0 8 0 scxspl 216 58360 0 58358 14 12 2 8 1 8 1 plimitpl 152 619 0 600 1 0 1 1 0 8 0 sigapl 424 2703 0 2656 8 1 7 8 0 8 0 knotepl 120 836 0 0 25 0 25 25 0 8 0 kqueuepl 224 1122 0 1111 11 7 4 5 0 8 3 pipepl 344 366 0 339 3 0 3 3 0 8 0 fdescpl 528 2655 0 2627 3 0 3 3 0 8 0 filepl 160 21198 0 20974 32 16 16 22 0 8 3 lockfpl 104 1575 0 1571 5 4 1 4 0 8 0 lockfspl 48 593 0 589 1 0 1 1 0 8 0 sessionpl 144 38 0 29 1 0 1 1 0 8 0 pgrppl 48 154 0 137 1 0 1 1 0 8 0 ucredpl 104 3875 0 3861 1 0 1 1 0 8 0 zombiepl 144 2659 0 2656 2 1 1 1 0 8 0 processpl 1232 2703 0 2656 7 3 4 6 0 8 0 procpl 664 6111 0 6060 8 2 6 8 0 8 0 sosppl 168 14 0 14 4 4 0 1 0 8 0 sockpl 752 5595 0 5559 45 34 11 18 0 8 6 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 78 0 0 7 0 7 7 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 1231 0 0 74 0 74 74 0 8 0 bufpl 280 22906 0 16763 439 0 439 439 0 8 0 anonpl 32 13283 0 0 108 0 108 108 0 246 0 amapchunkpl 152 76960 0 76548 59 25 34 36 0 158 11 amappl16 200 9920 0 9859 59 45 14 30 0 8 4 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 140 0 128 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 3437 0 3408 4 2 2 3 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 17 0 16 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 128 0 115 1 0 1 1 0 8 0 amappl6 120 263 0 258 1 0 1 1 0 8 0 amappl5 112 161 0 151 1 0 1 1 0 8 0 amappl4 104 334 0 312 1 0 1 1 0 8 0 amappl3 96 13604 0 13527 3 0 3 3 0 8 0 amappl2 88 2948 0 2870 2 0 2 2 0 8 0 amappl1 80 18743 0 18152 16 1 15 15 0 8 0 amappl 88 21073 0 20936 6 1 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 257 0 257 3 3 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 23 0 22 1 0 1 1 0 8 0 aobjpl 72 121 0 8 3 0 3 3 0 8 0 uaddrrnd 24 2655 0 2627 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2655 0 2627 1 0 1 1 0 8 0 vmmpekpl 168 21096 0 21045 3 0 3 3 0 8 0 vmmpepl 168 169474 0 167565 127 26 101 112 0 357 4 vmsppl 488 2654 0 2627 5 0 5 5 0 8 0 rwobjpl 80 50326 0 43343 157 10 147 148 0 8 1 pdppl 4096 5318 0 5254 114 43 71 84 0 8 7 pvpl 32 20218 0 0 164 1 163 163 0 265 0 pmappl 256 2654 0 2627 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 399 0 85 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83845ff0) 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(ffffffff838b04e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b04e0) 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(ffffffff838b04e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b04e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c478be0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838b04e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b04e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd806b98ab88,36fc9b8e000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c478f70,36fc9b8e000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c478f70) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 end trace frame: 0xffff80003c478ff0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83845ff0) 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(ffffffff838b04e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b04e0) 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(ffffffff838b04e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b04e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c478be0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838b04e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b04e0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd806b98ab88,36fc9b8e000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c478f70,36fc9b8e000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c478f70) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7a10de74dac0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x754a565fed10, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x754a565fed10, count: -1