kernel: protection fault trap, code=0 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace done_flush() at done_flush+0x38 vm_run(ffff8000245a58e0) at vm_run+0x304 sys/arch/amd64/amd64/vmm.c:4295 vmmioctl(a00,c0205602,ffff8000245a58e0,1,ffff80002267ba50) at vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 VOP_IOCTL(fffffd806e921590,c0205602,ffff8000245a58e0,1,fffffd807f7d74e0,ffff80002267ba50) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8071d3de50,c0205602,ffff8000245a58e0,ffff80002267ba50) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002267ba50,ffff8000245a59f8,ffff8000245a5a50) at sys_ioctl+0x4a2 syscall(ffff8000245a5ac0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000245a5ac0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8e59252dfa0, count: -8 ddb{0}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff8000246dce38 rbp 0xffff8000245a5650 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffc r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0xb8f9f8b608f129db r11 0x801d998ae6364d43 r12 0xffffffff82809820 dt_prov_static r13 0x246 r14 0xffff8000246dc800 r15 0xffff8000245a58e0 rip 0xffffffff81f126d0 done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff8000245a54a6 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{0}> show proc PROC (syz-executor.1) pid=246035 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff80002267ad30,0xffffffff82941978 process=0xffff800024513200 user=0xffff8000245a0000, vmspace=0xfffffd807e2e0308 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17139 236689 97578 0 2 0 syz-executor.1 *17139 246035 97578 0 7 0x4000000 syz-executor.1 42983 387050 78153 0 2 0 syz-executor.0 42983 296713 78153 0 3 0x4000080 fsleep syz-executor.0 78153 29626 33408 0 3 0x82 nanoslp syz-executor.0 97578 106837 33408 0 3 0x82 nanoslp syz-executor.1 77154 8924 1 0 3 0x100083 ttyin getty 549 178332 0 0 3 0x14280 nfsidl nfsio 60930 15865 0 0 3 0x14280 nfsidl nfsio 41488 418217 0 0 3 0x14280 nfsidl nfsio 11063 7619 0 0 3 0x14280 nfsidl nfsio 56255 146563 0 0 3 0x14280 nfsidl nfsio 64425 451810 0 0 3 0x14280 nfsidl nfsio 8529 89024 0 0 3 0x14280 nfsidl nfsio 45308 137984 0 0 3 0x14280 nfsidl nfsio 74290 84582 0 0 3 0x14280 nfsidl nfsio 14241 337938 0 0 3 0x14280 nfsidl nfsio 82020 245140 0 0 3 0x14280 nfsidl nfsio 37504 348117 0 0 3 0x14280 nfsidl nfsio 72757 358622 0 0 3 0x14280 nfsidl nfsio 81668 416863 0 0 3 0x14280 nfsidl nfsio 2924 270321 0 0 3 0x14280 nfsidl nfsio 10638 460866 0 0 3 0x14280 nfsidl nfsio 44948 261411 0 0 3 0x14280 nfsidl nfsio 16678 28328 0 0 3 0x14280 nfsidl nfsio 81764 34269 0 0 3 0x14280 nfsidl nfsio 51545 280386 0 0 3 0x14280 nfsidl nfsio 43969 516756 0 0 3 0x14200 bored sosplice 33408 8749 59137 0 3 0x82 thrsleep syz-fuzzer 33408 103318 59137 0 3 0x4000082 thrsleep syz-fuzzer 33408 444869 59137 0 3 0x4000082 thrsleep syz-fuzzer 33408 353882 59137 0 3 0x4000082 thrsleep syz-fuzzer 33408 4895 59137 0 3 0x4000082 thrsleep syz-fuzzer 33408 311960 59137 0 3 0x4000082 thrsleep syz-fuzzer 33408 466130 59137 0 3 0x4000082 thrsleep syz-fuzzer 33408 284978 59137 0 3 0x4000082 thrsleep syz-fuzzer 33408 219139 59137 0 3 0x4000082 kqread syz-fuzzer 59137 99802 90587 0 3 0x10008a sigsusp ksh 90587 342146 59141 0 3 0x9a kqread sshd 59141 373686 1 0 3 0x88 kqread sshd 63978 192520 48268 74 3 0x100092 bpf pflogd 48268 9789 1 0 3 0x80 netio pflogd 31682 334363 80988 73 3 0x100090 kqread syslogd 80988 136880 1 0 3 0x100082 netio syslogd 84397 87810 1 0 3 0x100080 kqread resolvd 34929 128867 48096 77 3 0x100092 kqread dhcpleased 64291 47949 48096 77 3 0x100092 kqread dhcpleased 48096 261755 1 0 3 0x80 kqread dhcpleased 84565 42427 0 0 3 0x14200 bored smr 17912 244491 0 0 2 0x14200 zerothread 48207 494356 0 0 3 0x14200 aiodoned aiodoned 3606 71483 0 0 3 0x14200 syncer update 20811 11010 0 0 3 0x14200 cleaner cleaner 11077 30934 0 0 3 0x14200 reaper reaper 53662 429021 0 0 3 0x14200 pgdaemon pagedaemon 39358 389105 0 0 3 0x14200 bored viomb 33135 412006 0 0 3 0x40014200 acpi0 acpi0 57150 262722 0 0 7 0x40014200 idle1 62042 507485 0 0 3 0x14200 bored softnet 64933 480919 0 0 3 0x14200 bored systqmp 95864 80069 0 0 3 0x14200 bored systq 22245 433729 0 0 3 0x40014200 bored softclock 60129 445745 0 0 3 0x40014200 idle0 1 175522 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 17139 (syz-executor.1) thread 0xffff80002267ba50 (246035) exclusive rwlock vcpu r = 0 (0xffff8000246dcbb0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 vm_run+0x2e0 sys/arch/amd64/amd64/vmm.c:4262 #2 vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 #3 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xba sys/kern/vfs_vnops.c:531 #5 sys_ioctl+0x4a2 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10169 6460K 7301K 78643K 88354 0 pcb 13 20K 23K 78643K 6404 0 rtable 112 11K 12K 78643K 7101 0 ifaddr 66 26K 35K 78643K 2929 0 sysctl 3 1K 3K 78643K 10 0 counters 46 34K 35K 78643K 1164 0 ioctlops 0 0K 4K 78643K 10062 0 iov 0 0K 32K 78643K 4313 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1416 89K 89K 78643K 26357 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 327 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 3701 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 6 17K 25K 78643K 39650 0 sigio 0 0K 0K 78643K 927 0 proc 87 88K 111K 78643K 4346 0 subproc 26 1K 1K 78643K 1044 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 11907 0 in_multi 22 1K 2K 78643K 3226 0 ether_multi 1 0K 0K 78643K 714 0 mrt 1 0K 0K 78643K 254 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 7414 0 pfkey data 0 0K 1K 78643K 26 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 566 1485K 1501K 78643K 484621 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 3059 0 NDP 8 0K 0K 78643K 879 0 temp 98 4214K 8310K 78643K 267756 0 kqueue 12 18K 28K 78643K 1708 0 SYN cache 2 8K 16K 78643K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 3222 0 3219 47 46 1 5 0 8 0 rtentry 112 2082 0 2056 7 6 1 2 0 8 0 unpcb 128 22530 0 22515 274 273 1 9 0 8 0 syncache 296 129 0 129 45 45 0 1 0 8 0 tcpqe 32 67 32925 67 2 2 0 1 0 8 0 tcpcb 736 32261 0 32251 744 737 7 20 0 8 5 arp 120 244 0 240 1 0 1 1 0 8 0 inpcb 304 70144 0 70133 699 693 6 15 0 8 5 rttmr 72 76 0 76 19 19 0 1 0 8 0 nd6 48 430 0 427 4 3 1 1 0 8 0 pkpcb 40 310 0 310 36 35 1 1 0 8 1 kcovpl 48 80 0 78 1 0 1 1 0 8 0 ppxss 1248 230 0 230 43 43 0 1 0 8 0 pfstscr 40 22 0 22 3 3 0 1 0 8 0 pffrag 232 411 0 410 28 27 1 1 0 482 0 pffrnode 88 411 0 410 28 27 1 1 0 8 0 pffrent 40 4607 0 4606 36 35 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 134 0 118 5 3 2 2 0 8 0 pftag 88 6 0 4 1 0 1 1 0 8 0 pfqueue 264 6 0 0 1 0 1 1 0 8 0 pfstitem 24 19 0 17 1 0 1 1 0 8 0 pfstkey 112 60 0 58 1 0 1 1 0 8 0 pfstate 320 39 0 37 2 1 1 2 0 8 0 pfrule 1360 774 0 712 7 1 6 6 0 8 0 art_heap8 4096 8 0 7 6 5 1 3 0 8 0 art_heap4 256 10918 0 10773 83 73 10 15 0 8 0 art_table 32 10926 0 10780 7 5 2 2 0 8 0 art_node 16 1914 0 1894 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 7 1 1 0 1 0 8 0 semapl 112 3699 0 3689 1 0 1 1 0 8 0 shmpl 112 134 0 6 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 54939 0 53435 95 0 95 95 0 8 0 ffsino 272 54939 0 53435 104 3 101 101 0 8 0 nchpl 144 106644 0 105038 61 0 61 61 0 8 0 uvmvnodes 72 5963 0 0 109 0 109 109 0 8 0 vnodes 224 5963 0 0 351 0 351 351 0 8 0 namei 1024 380176 0 380176 28 27 1 1 0 8 1 percpumem 16 594 0 559 1 0 1 1 0 8 0 vcpupl 2048 459 0 0 58 0 58 58 0 8 0 vmpool 560 512 0 53 38 5 33 33 0 8 0 pfiaddrpl 120 53 0 27 2 1 1 1 0 8 0 scsiplug 72 21 0 21 5 5 0 1 0 8 0 scxspl 216 338514 0 338514 42 41 1 8 0 8 1 plimitpl 152 4222 0 4213 1 0 1 1 0 8 0 sigapl 424 39737 0 39683 14 7 7 7 0 8 0 futexpl 64 415594 0 415593 32 31 1 1 0 8 0 knotepl 112 243 0 0 3 0 3 3 0 8 0 kqueuepl 216 10555 0 10535 227 225 2 9 0 8 0 pipepl 336 15480 0 15470 435 433 2 11 0 8 1 fdescpl 496 39656 0 39637 3 0 3 3 0 8 0 filepl 152 306995 0 306885 601 591 10 15 0 8 5 lockfpl 104 12703 0 12701 23 22 1 2 0 8 0 lockfspl 48 3428 0 3426 1 0 1 1 0 8 0 sessionpl 144 101 0 90 1 0 1 1 0 8 0 pgrppl 48 614 0 603 1 0 1 1 0 8 0 ucredpl 96 36651 0 36637 1 0 1 1 0 8 0 zombiepl 144 39683 0 39683 19 18 1 1 0 8 1 processpl 1064 39737 0 39683 5 1 4 4 0 8 0 procpl 672 99588 0 99524 102 95 7 8 0 8 1 srpgc 96 60 0 60 19 19 0 1 0 8 0 sosppl 168 299 0 299 55 55 0 1 0 8 0 sockpl 480 96390 0 96361 1687 1675 12 34 0 8 8 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 13 0 0 2 0 2 2 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 665 0 0 45 6 39 42 0 8 0 mtagpl 96 2264 0 0 12 0 12 12 0 8 0 mbufpl 256 6097 0 0 343 0 343 343 0 8 0 bufpl 280 78436 0 72228 453 6 447 453 0 8 0 anonpl 24 11182925 0 11152454 1059 868 191 215 0 186 0 amapchunkpl 152 1218418 0 1217621 360 323 37 45 0 158 6 amappl16 200 118136 0 116730 470 392 78 90 0 8 0 amappl15 192 9001 0 8995 1 0 1 1 0 8 0 amappl14 184 4812 0 4810 1 0 1 1 0 8 0 amappl13 176 8090 0 8085 1 0 1 1 0 8 0 amappl12 168 4557 0 4555 1 0 1 1 0 8 0 amappl11 160 2998 0 2980 1 0 1 1 0 8 0 amappl10 152 4656 0 4652 1 0 1 1 0 8 0 amappl9 144 5637 0 5634 1 0 1 1 0 8 0 amappl8 136 6646 0 6551 4 0 4 4 0 8 0 amappl7 128 5133 0 5122 1 0 1 1 0 8 0 amappl6 120 5799 0 5783 1 0 1 1 0 8 0 amappl5 112 30648 0 30618 1 0 1 1 0 8 0 amappl4 104 12590 0 12562 1 0 1 1 0 8 0 amappl3 96 12687 0 12658 1 0 1 1 0 8 0 amappl2 88 50176 0 50103 2 0 2 2 0 8 0 amappl1 80 650220 0 649753 17 6 11 13 0 8 0 amappl 88 482048 0 481750 7 0 7 7 0 92 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 128 253 0 253 1 1 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 64 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 40168 0 39690 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 40168 0 39690 3 0 3 3 0 8 0 vmmpekpl 168 250193 0 250138 4 1 3 3 0 8 0 vmmpepl 168 3543881 0 3538169 1467 1204 263 281 0 357 8 vmsppl 368 40167 0 39690 48 4 44 44 0 8 0 rwobjpl 56 829000 0 826592 154 119 35 38 0 8 0 pdppl 4096 80344 0 79839 622 117 505 506 0 8 0 pvpl 32 18633817 0 18611956 1512 1323 189 247 0 265 0 pmappl 224 40167 0 39690 29 0 29 29 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 2630 0 1408 38 2 36 36 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace done_flush() at done_flush+0x38 vm_run(ffff8000245a58e0) at vm_run+0x304 sys/arch/amd64/amd64/vmm.c:4295 vmmioctl(a00,c0205602,ffff8000245a58e0,1,ffff80002267ba50) at vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 VOP_IOCTL(fffffd806e921590,c0205602,ffff8000245a58e0,1,fffffd807f7d74e0,ffff80002267ba50) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8071d3de50,c0205602,ffff8000245a58e0,ffff80002267ba50) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002267ba50,ffff8000245a59f8,ffff8000245a5a50) at sys_ioctl+0x4a2 syscall(ffff8000245a5ac0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000245a5ac0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8e59252dfa0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp