uvm_fault(0xfffffd807391e208, 0xf, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82eedbd8 cs 8 rflags 10246 cr2 f cpl 0 rsp ffff80003c4d4990 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82eedbd8 Starting stack trace... panic(ffffffff8332bdd2) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c4d48e0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ktrops(ffff80002a2b4538,ffffffffffffffff,0,80000b1c,fffffd80799462d0,fffffd807f7d3888) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:727 [inline] ktrops(ffff80002a2b4538,ffffffffffffffff,0,80000b1c,fffffd80799462d0,fffffd807f7d3888) at ktrops+0x58 sys/kern/kern_ktrace.c:570 doktrace(fffffd80799462d0,4,b1c,0,ffff80002a2b4538) at doktrace+0x6dd ktrsetchildren sys/kern/kern_ktrace.c:595 [inline] doktrace(fffffd80799462d0,4,b1c,0,ffff80002a2b4538) at doktrace+0x6dd sys/kern/kern_ktrace.c:517 sys_ktrace(ffff80002a2b4538,ffff80003c4d4cf0,ffff80003c4d4c40) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:558 syscall(ffff80003c4d4cf0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4d4cf0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4b6d8603150, count: 249 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 99 3 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND 86007 45409 0 0 0 0 syz-executor *166709 8610 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7964b0c97c30, 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(0xfffffd807391e208, 0xf, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7964b0c97c30, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c0223d0 rbx 0 rdx 0 rcx 0xffff8000fffe94a8 rax 0x32 r8 0xffff80003c022300 r9 0x1 r10 0xcd3491165a3e3f4 r11 0xdd9dbdd772ee963b r12 0 r13 0 r14 0xffff8000fffe94a8 r15 0 rip 0xffffffff812ca3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c022350 ss 0x10 savectx+0xae: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=166709 pid=8610 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff1210,0xffff8000fffe82c8 process=0xffff8000fffe4970 user=0xffff80003c01d000, vmspace=0xfffffd806ebc35a8 estcpu=36, cpticks=1, pctcpu=0.24, user=3, sys=84, intr=3 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77323 449538 92428 0 2 0 syz-executor 77323 397828 92428 0 3 0x4000080 fsleep syz-executor 24701 222414 53589 0 2 0 syz-executor 24701 366059 53589 0 3 0x4000080 fsleep syz-executor 24701 434183 53589 0 3 0x4000080 fsleep syz-executor 24701 358730 53589 0 3 0x4000080 fsleep syz-executor 45409 86007 26614 0 7 0 syz-executor 45409 483876 26614 0 3 0x4000000 sbar syz-executor 94302 111522 80748 0 2 0 syz-executor 94302 296263 80748 0 2 0x4000000 syz-executor 94302 150107 80748 0 2 0x4000000 syz-executor 87624 322070 37822 0 3 0x80 nanoslp syz-executor 87624 349977 37822 0 3 0x4000080 semwait syz-executor 87624 498119 37822 0 3 0x4000080 fsleep syz-executor 87624 285308 37822 0 3 0x4000080 fsleep syz-executor 87624 232380 37822 0 3 0x4000080 fsleep syz-executor 95590 372120 87487 0 3 0x82 nanoslp syz-executor 92428 116882 87487 0 3 0x82 nanoslp syz-executor 26614 443630 87487 0 3 0x82 nanoslp syz-executor 51949 213398 1 0 3 0x100083 ttyin getty 84594 204242 87487 0 3 0x2 biowait syz-executor * 8610 166709 87487 0 7 0x2 syz-executor 80748 194872 87487 0 3 0x82 nanoslp syz-executor 71522 397488 0 0 3 0x14200 bored sosplice 37822 339599 87487 0 3 0x82 nanoslp syz-executor 53589 279446 87487 0 3 0x82 nanoslp syz-executor 87487 370157 26483 0 2 0x2 syz-executor 26483 114412 35210 0 3 0x10008a sigsusp ksh 35210 9449 90576 0 3 0x98 kqread sshd-session 90576 167933 37672 0 3 0x92 kqread sshd-session 37672 489128 1 0 3 0x88 kqread sshd 93655 382601 45620 74 3 0x1100092 bpf pflogd 45620 139299 1 0 3 0x80 sbwait pflogd 12414 267973 27863 73 3 0x1100090 kqread syslogd 27863 177962 1 0 3 0x100082 sbwait syslogd 37276 504296 1 0 3 0x100080 kqread resolvd 61459 67834 84089 77 3 0x100092 kqread dhcpleased 60014 508486 84089 77 3 0x100092 kqread dhcpleased 84089 28516 1 0 3 0x80 kqread dhcpleased 89667 187567 0 0 3 0x14200 bored smr 79565 462731 0 0 2 0x14200 zerothread 44141 386651 0 0 3 0x14200 aiodoned aiodoned 27973 245016 0 0 3 0x14200 syncer update 81571 390406 0 0 3 0x14200 cleaner cleaner 94422 523313 0 0 3 0x14200 reaper reaper 11162 346803 0 0 3 0x14200 pgdaemon pagedaemon 80686 480195 0 0 3 0x14200 bored viomb 41333 40109 0 0 3 0x40014200 acpi0 acpi0 15358 46967 0 0 3 0x40014200 idle1 81219 184733 0 0 3 0x14200 bored softnet3 92528 72763 0 0 3 0x14200 bored softnet2 86093 482873 0 0 3 0x14200 bored softnet1 7777 218200 0 0 3 0x14200 netlock softnet0 57910 96915 0 0 2 0x14200 systqmp 74569 381843 0 0 3 0x14200 bored systq 56866 407172 0 0 3 0x14200 tmoslp softclockmp 33534 115392 0 0 3 0x40014200 tmoslp softclock 85028 279837 0 0 3 0x40014200 idle0 1 219659 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 45409 (syz-executor) thread 0xffff80002a2b4538 (483876) Process 84594 (syz-executor) thread 0xffff8000fffe82b8 (204242) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10237 11056K 12443K 166960K 17078 0 pcb 17 18K 20K 166960K 625 0 rtable 320 15K 15K 166960K 1364 0 pf 52 21K 81K 166960K 307 0 ifaddr 37 6K 8K 166960K 192 0 ifgroup 65 2K 3K 166960K 311 0 sysctl 4 1K 1K 166960K 12 0 counters 70 37K 37K 166960K 396 0 ioctlops 0 0K 4K 166960K 1934 0 iov 0 0K 16K 166960K 168 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1479 93K 93K 166960K 5239 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 56 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 231 0 dirhash 12 2K 3K 166960K 72 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 3151 0 sigio 0 0K 0K 166960K 134 0 proc 76 103K 140K 166960K 1135 0 subproc 72 4K 4K 166960K 172 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 618 0 in_multi 66 4K 7K 166960K 346 0 ether_multi 1 0K 0K 166960K 26 0 mrt 1 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 869 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 244 160K 178K 166960K 29842 0 UVM aobj 52 2K 4K 166960K 63 0 pinsyscall 41 82K 104K 166960K 4529 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 157 0 NDP 14 0K 2K 166960K 140 0 temp 77 8692K 8804K 166960K 108731 0 kqueue 14 22K 30K 166960K 510 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 120 290 0 287 3 2 1 3 0 8 0 rtentry 176 392 0 255 8 0 8 8 0 8 0 unpcb 144 2357 0 2338 11 5 6 6 0 8 5 syncache 336 9 0 9 4 4 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 808 982 0 976 13 5 8 8 0 8 7 arp 128 109 0 32 3 0 3 3 0 8 0 ipq 40 12 0 4 1 0 1 1 0 8 0 ipqe 40 20 0 12 1 0 1 1 0 8 0 inpcb 384 3601 0 3591 34 25 9 15 0 8 7 nd6 144 80 0 62 2 0 2 2 0 8 1 pkpcb 40 150 0 150 2 1 1 1 0 8 1 kcovpl 48 19 0 11 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 133 0 132 2 1 1 1 0 8 0 pppxif 1504 11 0 10 3 2 1 1 0 8 0 pfstscr 40 6 0 5 1 0 1 1 0 8 0 pffrag 232 7 0 0 1 0 1 1 0 482 0 pffrnode 88 6 0 0 1 0 1 1 0 8 0 pffrent 40 10 0 3 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfrktable 1344 5 0 4 3 2 1 1 0 8 0 pfanchor 1288 8 0 0 1 0 1 1 0 8 0 pftag 88 5 0 1 1 0 1 1 0 8 0 pfstitem 24 49 0 25 1 0 1 1 0 8 0 pfstkey 128 58 0 34 2 0 2 2 0 8 0 pfstate 384 53 0 30 5 1 4 5 0 8 0 pfrule 1344 49 0 29 3 1 2 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1346 0 1017 35 9 26 35 0 8 4 art_table 32 1350 0 1017 5 0 5 5 0 8 0 art_node 16 351 0 290 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 12 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 223 0 213 1 0 1 1 0 8 0 shmpl 112 60 0 11 2 0 2 2 0 8 0 dirhash 1024 58 0 41 3 0 3 3 0 8 0 dino2pl 256 7816 0 6294 96 0 96 96 0 8 0 ffsino 288 7816 0 6294 110 0 110 110 0 8 1 nchpl 144 12081 0 10365 64 0 64 64 0 8 0 rtmask 32 19 0 19 3 2 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 43518 0 43517 3 2 1 1 0 8 0 percpumem 16 213 0 163 1 0 1 1 0 8 0 kstatmem 264 198 0 170 4 1 3 3 0 8 0 scsiplug 72 8 0 8 4 4 0 1 0 8 0 scxspl 216 35503 0 35502 15 14 1 8 1 8 0 plimitpl 152 464 0 447 1 0 1 1 0 8 0 sigapl 424 3424 0 3375 7 1 6 7 0 8 0 futexpl 64 44850 0 44843 1 0 1 1 0 8 0 knotepl 120 812 0 0 25 0 25 25 0 8 0 kqueuepl 224 1221 0 1210 7 2 5 5 0 8 4 pipepl 336 496 0 469 8 3 5 6 0 8 2 fdescpl 520 3400 0 3370 3 0 3 3 0 8 0 filepl 160 26211 0 25993 36 16 20 21 0 8 6 lockfpl 104 1066 0 1064 2 1 1 2 0 8 0 lockfspl 48 346 0 344 1 0 1 1 0 8 0 sessionpl 144 39 0 30 1 0 1 1 0 8 0 pgrppl 48 137 0 120 1 0 1 1 0 8 0 ucredpl 104 5662 0 5649 1 0 1 1 0 8 0 zombiepl 144 3376 0 3375 1 0 1 1 0 8 0 processpl 1192 3424 0 3375 5 0 5 5 0 8 0 procpl 656 8304 0 8244 7 1 6 7 0 8 0 srpgc 96 29 0 29 3 2 1 1 0 8 1 sosppl 168 23 0 23 2 1 1 1 0 8 1 sockpl 728 6507 0 6475 53 37 16 22 0 8 13 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 46 0 0 5 0 5 5 0 8 0 mtagpl 96 171 0 0 4 0 4 4 0 8 0 mbufpl 256 1325 0 0 81 0 81 81 0 8 0 bufpl 280 10485 0 4342 440 1 439 440 0 8 0 anonpl 32 8822 0 0 71 0 71 71 0 246 0 amapchunkpl 152 100461 0 99924 43 12 31 36 0 158 4 amappl16 200 6587 0 6547 43 33 10 15 0 8 5 amappl15 192 5 0 5 2 2 0 1 0 8 0 amappl14 184 149 0 137 1 0 1 1 0 8 0 amappl13 176 9 0 9 2 2 0 1 0 8 0 amappl12 168 4293 0 4263 3 1 2 2 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 4 0 3 2 1 1 1 0 8 0 amappl9 144 319 0 318 1 0 1 1 0 8 0 amappl8 136 25 0 21 1 0 1 1 0 8 0 amappl7 128 139 0 126 1 0 1 1 0 8 0 amappl6 120 297 0 292 1 0 1 1 0 8 0 amappl5 112 167 0 157 1 0 1 1 0 8 0 amappl4 104 369 0 348 1 0 1 1 0 8 0 amappl3 96 20949 0 20840 5 1 4 4 0 8 0 amappl2 88 841 0 777 2 0 2 2 0 8 0 amappl1 80 22210 0 21616 15 0 15 15 0 8 0 amappl 88 28376 0 28204 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 3 0 3 3 3 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 10 0 10 3 3 0 1 0 8 0 dma128 128 257 0 257 5 5 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 9 0 9 3 2 1 1 0 8 1 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 62 0 11 1 0 1 1 0 8 0 uaddrrnd 24 3400 0 3370 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3400 0 3370 1 0 1 1 0 8 0 vmmpekpl 168 25319 0 25257 4 0 4 4 0 8 0 vmmpepl 168 211188 0 209195 113 13 100 103 0 357 3 vmsppl 480 3399 0 3370 6 1 5 5 0 8 0 rwobjpl 72 55667 0 48741 132 4 128 131 0 8 0 pdppl 4096 6808 0 6740 118 46 72 86 0 8 4 pvpl 32 16674 0 0 135 1 134 134 0 265 0 pmappl 256 3399 0 3370 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 513 0 79 13 0 13 13 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(ffffffff838daf30) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:114 [inline] __mp_lock(ffffffff838daf30) at __mp_lock+0x190 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:149 intr_handler(ffff80003c428690,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7ea746d746f0, count: 5 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(ffffffff838daf30) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:114 [inline] __mp_lock(ffffffff838daf30) at __mp_lock+0x190 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:149 intr_handler(ffff80003c428690,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7ea746d746f0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x680 savectx() at savectx+0xae end of kernel end trace frame: 0x7964b0c97c30, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7964b0c97c30, count: -1