panic: trap type 6, code=10, pc=0 Starting stack trace... panic(ffffffff832f36b5) at panic+0x1ba sys/kern/subr_prf.c:229 kerntrap(ffff800035519190) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b 0(fffffd806c46fe78,fffffd806c46fe78,0,fffffd806c46fe78,356,0) at 0 softclock_process_kclock_timeout(fffffd806c46fe78,0) at softclock_process_kclock_timeout+0x2a0 sys/kern/kern_timeout.c:692 softclock(0) at softclock+0x199 sys/kern/kern_timeout.c:745 softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x74164ed3b370, count: 249 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 -201341464 EXIT 0 3 Stopped at savectx+0xae: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND *431876 90877 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x78b1f3ffc5d0, 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> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: attempt to execute user address 0x0 in supervisor mode ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x78b1f3ffc5d0, count: -1 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a8b5340 rbx 0 rdx 0 rcx 0 rax 0x3b r8 0xffff80002a8b5270 r9 0 r10 0xa51ae46c7b546faf r11 0xe163f8bc046fc006 r12 0 r13 0 r14 0xffff80002a8c99d8 r15 0 rip 0xffffffff82b0e3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a8b52c0 ss 0x10 savectx+0xae: movl $0,%gs:0x680 ddb> show proc PROC (syz-executor) tid=431876 pid=90877 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a89dc60,0xffff80002a8c9c78 process=0xffff80002f0ff438 user=0xffff80002a8b0000, vmspace=0xfffffd806c06f2e0 estcpu=32, cpticks=1, pctcpu=0.13, user=0, sys=20, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 52579 10062 95050 0 2 0 syz-executor 52579 139332 95050 0 3 0x4000000 futex syz-executor 76210 354713 48714 0 3 0 netlock syz-executor 76210 150261 48714 0 2 0x4000000 syz-executor 76210 290359 48714 0 3 0x4000080 fsleep syz-executor 60204 152558 59567 0 3 0 futex syz-executor 60204 294107 59567 0 3 0x4000080 fsleep syz-executor 60204 89345 59567 0 2 0x4000000 syz-executor 96855 77680 90877 0 2 0 syz-executor 96855 289457 90877 0 2 0x4000000 syz-executor 96855 303212 90877 0 2 0x4000000 syz-executor 89863 461157 81315 0 3 0 futex syz-executor 89863 41760 81315 0 3 0x4000000 futex syz-executor *90877 431876 94131 0 7 0x2 syz-executor 58924 401698 0 0 3 0x14280 nfsidl nfsio 14526 63891 0 0 3 0x14280 nfsidl nfsio 13917 187252 0 0 3 0x14280 nfsidl nfsio 46958 267625 0 0 3 0x14280 nfsidl nfsio 57204 289822 0 0 3 0x14280 nfsidl nfsio 28881 328726 0 0 3 0x14280 nfsidl nfsio 51580 306638 0 0 3 0x14280 nfsidl nfsio 46830 350199 0 0 3 0x14280 nfsidl nfsio 3353 427891 0 0 3 0x14280 nfsidl nfsio 99179 336717 0 0 3 0x14280 nfsidl nfsio 57921 233323 0 0 3 0x14280 nfsidl nfsio 94042 379622 0 0 3 0x14280 nfsidl nfsio 45250 135606 0 0 3 0x14280 nfsidl nfsio 94532 96132 0 0 3 0x14280 nfsidl nfsio 48240 496772 0 0 3 0x14280 nfsidl nfsio 36749 183726 0 0 3 0x14280 nfsidl nfsio 7172 271414 0 0 3 0x14280 nfsidl nfsio 62908 133714 0 0 3 0x14280 nfsidl nfsio 99559 369279 0 0 3 0x14280 nfsidl nfsio 25337 433571 0 0 3 0x14280 nfsidl nfsio 72815 510904 0 0 3 0x14200 acct acct 59567 214674 94131 0 2 0x482 syz-executor 38171 342316 94131 0 2 0x2 syz-executor 81315 146361 94131 0 3 0x3 inode syz-executor 62589 401608 94131 0 2 0x2 syz-executor 48714 480108 94131 0 2 0x482 syz-executor 71588 40153 0 0 3 0x14200 bored sosplice 95050 183399 94131 0 2 0x3 syz-executor 56921 496555 94131 0 2 0x482 syz-executor 94131 320414 407 0 3 0x82 kqread syz-executor 407 68872 5321 0 3 0x10008a sigsusp ksh 5321 263858 44761 0 3 0x98 kqread sshd-session 44761 362888 51136 0 3 0x92 kqread sshd-session 94338 155149 1 0 2 0x100003 getty 51136 353683 1 0 3 0x88 kqread sshd 58500 448362 56229 73 3 0x1100090 kqread syslogd 56229 249326 1 0 3 0x100082 sbwait syslogd 98195 413736 1 0 3 0x100080 kqread resolvd 10614 280054 19698 77 3 0x100092 kqread dhcpleased 53338 157122 19698 77 3 0x100092 kqread dhcpleased 19698 65998 1 0 3 0x80 kqread dhcpleased 49971 309992 0 0 3 0x14200 bored smr 32731 368610 0 0 2 0x14200 zerothread 39067 65722 0 0 3 0x14200 aiodoned aiodoned 5906 36103 0 0 2 0x14600 update 20106 427481 0 0 3 0x14200 cleaner cleaner 31258 123806 0 0 3 0x14200 reaper reaper 62433 108826 0 0 3 0x14200 pgdaemon pagedaemon 93431 303075 0 0 3 0x14200 bored viomb 22534 120550 0 0 3 0x40014200 acpi0 acpi0 97608 16438 0 0 3 0x14200 bored softnet3 413 243535 0 0 3 0x14200 bored softnet2 44252 67154 0 0 3 0x14200 bored softnet1 11718 296165 0 0 2 0x14200 softnet0 54004 476495 0 0 3 0x14200 bored systqmp 1008 469038 0 0 3 0x14200 bored systq 56878 192733 0 0 3 0x40014200 netlock softclock 13893 54587 0 0 3 0x40014200 idle0 1 356680 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 11072K 12223K 166960K 18959 0 pcb 17 20K 24K 166960K 810 0 rtable 209 10K 11K 166960K 1822 0 pf 33 13K 16K 166960K 256 0 ifaddr 39 7K 9K 166960K 197 0 ifgroup 54 2K 3K 166960K 341 0 sysctl 4 1K 3K 166960K 10 0 counters 30 17K 18K 166960K 228 0 ioctlops 0 0K 4K 166960K 769 0 iov 0 0K 32K 166960K 388 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1643 103K 104K 166960K 5956 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 6K 14K 166960K 74 0 VM map 2 1K 1K 166960K 2 0 sem 26 153K 153K 166960K 163 0 dirhash 12 2K 2K 166960K 87 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 236K 166960K 4129 0 sigio 0 0K 0K 166960K 223 0 proc 61 59K 108K 166960K 1159 0 subproc 72 4K 4K 166960K 181 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 678 0 in_multi 82 6K 7K 166960K 357 0 ether_multi 1 0K 0K 166960K 39 0 mrt 2 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 1377 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 6 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 218 160K 195K 166960K 40770 0 UVM aobj 165 6K 6K 166960K 167 0 pinsyscall 39 78K 94K 166960K 5458 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 242 0 NDP 11 0K 1K 166960K 142 0 temp 75 8684K 8940K 166960K 118339 0 kqueue 13 20K 30K 166960K 636 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 618 0 615 8 5 3 3 0 8 2 rtentry 136 524 0 438 4 0 4 4 0 8 0 unpcb 144 2865 0 2850 20 14 6 8 0 8 5 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 808 1151 0 1147 25 17 8 8 0 8 7 arp 88 120 0 100 1 0 1 1 0 8 0 ipq 40 27 0 26 3 2 1 1 0 8 0 ipqe 40 101 0 100 3 2 1 1 0 8 0 inpcb 344 4670 0 4656 48 39 9 11 0 8 7 nd6 104 86 0 66 1 0 1 1 0 8 0 pkpcb 40 50 0 50 3 2 1 1 0 8 1 kcovpl 48 20 0 12 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1072 159 0 159 5 4 1 1 0 8 1 pppxif 1384 17 0 17 5 4 1 1 0 8 1 pfrktable 1344 131 0 131 1 1 0 1 0 8 0 rttmr 136 4 0 4 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1691 0 1317 34 6 28 30 0 8 2 art_table 32 1693 0 1317 4 0 4 4 0 8 0 art_node 16 513 0 440 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 8 1 0 1 1 0 8 0 semupl 112 4 0 4 3 2 1 1 0 8 1 semapl 112 149 0 125 1 0 1 1 0 8 0 shmpl 112 164 0 2 5 0 5 5 0 8 0 dirhash 1024 68 0 51 3 0 3 3 0 8 0 dino2pl 256 8966 0 7446 96 0 96 96 0 8 0 ffsino 248 8966 0 7446 96 0 96 96 0 8 0 nchpl 144 14736 0 14131 64 32 32 64 0 8 8 rtmask 32 17 0 17 4 3 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 54642 0 54642 6 4 2 2 0 8 2 kstatmem 264 200 0 178 2 0 2 2 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 11 0 11 6 5 1 1 0 8 1 scxspl 216 47004 0 47003 29 24 5 8 1 8 4 plimitpl 152 1041 0 1025 1 0 1 1 0 8 0 sigapl 424 4397 0 4329 8 0 8 8 0 8 0 futexpl 64 55466 0 55463 1 0 1 1 0 8 0 knotepl 120 190138 0 190091 63 53 10 17 0 8 7 kqueuepl 184 1504 0 1495 16 13 3 7 0 8 2 pipepl 296 591 0 564 10 2 8 8 0 8 5 fdescpl 440 4350 0 4320 5 1 4 5 0 8 0 filepl 120 32303 0 32089 38 23 15 15 0 8 6 lockfpl 104 1289 0 1287 2 1 1 2 0 8 0 lockfspl 48 492 0 490 1 0 1 1 0 8 0 sessionpl 144 34 0 26 1 0 1 1 0 8 0 pgrppl 48 335 0 319 1 0 1 1 0 8 0 ucredpl 104 6552 0 6539 1 0 1 1 0 8 0 zombiepl 144 6738 0 6736 5 4 1 1 0 8 0 processpl 1112 4397 0 4329 5 0 5 5 0 8 0 procpl 656 11682 0 11604 8 0 8 8 0 8 0 sosppl 168 16 0 16 3 2 1 1 0 8 1 sockpl 528 8336 0 8306 53 43 10 15 0 8 8 mcl64k 65536 238 0 237 7 6 1 1 0 8 0 mcl16k 16384 6 0 6 3 2 1 1 0 8 1 mcl12k 12288 5 0 5 3 2 1 1 0 8 1 mcl9k 9216 5 0 5 2 1 1 1 0 8 1 mcl8k 8192 102 0 102 7 6 1 1 0 8 1 mcl4k 4096 8422 0 8370 20 12 8 15 0 8 1 mcl2k2 2112 2 0 2 1 1 0 1 0 8 0 mcl2k 2048 4725 0 4724 11 9 2 6 0 8 1 mtagpl 96 604 0 488 8 3 5 7 0 8 0 mbufpl 256 52564 0 52254 271 241 30 225 0 8 1 bufpl 280 14339 0 8111 446 0 446 446 0 8 0 anonpl 24 521583 0 518335 136 90 46 67 0 187 10 amapchunkpl 152 141167 0 140723 94 60 34 37 0 158 14 amappl16 200 8342 0 8306 75 61 14 26 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 140 0 130 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 5154 0 5126 2 0 2 2 0 8 0 amappl11 160 43 0 33 1 0 1 1 0 8 0 amappl10 152 8 0 8 2 1 1 1 0 8 1 amappl9 144 255 0 253 1 0 1 1 0 8 0 amappl8 136 73 0 71 1 0 1 1 0 8 0 amappl7 128 122 0 112 1 0 1 1 0 8 0 amappl6 120 287 0 284 1 0 1 1 0 8 0 amappl5 112 163 0 156 1 0 1 1 0 8 0 amappl4 104 336 0 318 1 0 1 1 0 8 0 amappl3 96 28667 0 28565 4 0 4 4 0 8 0 amappl2 88 817 0 760 2 0 2 2 0 8 0 amappl1 80 25028 0 24476 14 0 14 14 0 8 1 amappl 88 39062 0 38909 5 0 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 dma256 256 7 0 7 2 1 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 166 0 2 3 0 3 3 0 8 0 uaddrrnd 24 4350 0 4320 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4350 0 4320 1 0 1 1 0 8 0 vmmpekpl 168 31895 0 31833 3 0 3 3 0 8 0 vmmpepl 168 268594 0 266748 127 31 96 103 0 357 6 vmsppl 360 4349 0 4320 4 1 3 4 0 8 0 rwobjpl 32 69675 0 62730 63 5 58 59 0 8 0 pdppl 4096 8707 0 8640 214 147 67 81 0 8 0 pvpl 32 1718932 0 1710296 280 165 115 154 0 265 23 pmappl 216 4349 0 4320 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 709 0 458 13 0 13 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x78b1f3ffc5d0, count: -1 ddb> machine ddbcpu 1 No such command ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x78b1f3ffc5d0, count: -1