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(ffff800027c75bd0) at vm_run+0x304 sys/arch/amd64/amd64/vmm.c:4295 vmmioctl(a00,c0205602,ffff800027c75bd0,1,ffff80002123d500) at vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 VOP_IOCTL(fffffd806ec96130,c0205602,ffff800027c75bd0,1,fffffd807f7d7780,ffff80002123d500) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8067ea1bf8,c0205602,ffff800027c75bd0,ffff80002123d500) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002123d500,ffff800027c75ce8,ffff800027c75d40) at sys_ioctl+0x4a2 syscall(ffff800027c75db0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027c75db0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeb1375f92d0, count: -8 ddb{0}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff8000260ee638 rbp 0xffff800027c75940 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0x91dc485d7e6151cb r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0x20de888abab73b22 r11 0x4b51b2035c8e0efb r12 0xffffffff827ab490 dt_prov_static r13 0x246 r14 0xffff8000260ee000 r15 0xffff800027c75bd0 rip 0xffffffff82367120 done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff800027c75796 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{0}> show proc PROC (syz-executor.2) pid=152276 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff80002125e540,0xffffffff8283f4d0 process=0xffff8000ffff94d0 user=0xffff800027c70000, vmspace=0xfffffd8064fa2ba8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16800 305174 64615 0 2 0 syz-executor.0 36292 351428 84799 0 2 0 syz-executor.3 26095 287287 18632 0 7 0 syz-executor.2 *26095 152276 18632 0 7 0x4000000 syz-executor.2 78509 467594 65508 0 3 0x80 nanoslp syz-executor.1 78509 522198 65508 0 3 0x4000080 ttyout syz-executor.1 78509 299427 65508 0 3 0x4000080 fsleep syz-executor.1 18632 286495 39236 0 3 0x82 nanoslp syz-executor.2 91439 340581 1 0 3 0x100083 ttyin getty 64615 159191 39236 0 3 0x82 nanoslp syz-executor.0 84799 336762 39236 0 3 0x82 nanoslp syz-executor.3 21826 461765 0 0 3 0x14280 nfsidl nfsio 21062 294024 0 0 3 0x14280 nfsidl nfsio 13668 329772 0 0 3 0x14280 nfsidl nfsio 26565 314749 0 0 3 0x14280 nfsidl nfsio 44979 220647 0 0 3 0x14280 nfsidl nfsio 21144 428898 0 0 3 0x14280 nfsidl nfsio 49536 57110 0 0 3 0x14280 nfsidl nfsio 19881 463734 0 0 3 0x14280 nfsidl nfsio 18825 274547 0 0 3 0x14280 nfsidl nfsio 45168 53225 0 0 3 0x14280 nfsidl nfsio 62419 186489 0 0 3 0x14280 nfsidl nfsio 1275 31514 0 0 3 0x14280 nfsidl nfsio 70847 490467 0 0 3 0x14280 nfsidl nfsio 10735 172269 0 0 3 0x14280 nfsidl nfsio 47585 403993 0 0 3 0x14280 nfsidl nfsio 39443 6485 0 0 3 0x14280 nfsidl nfsio 97773 212744 0 0 3 0x14280 nfsidl nfsio 3177 312752 0 0 3 0x14280 nfsidl nfsio 29903 402257 0 0 3 0x14280 nfsidl nfsio 28742 450283 0 0 3 0x14280 nfsidl nfsio 65508 408463 39236 0 3 0x82 nanoslp syz-executor.1 87756 119025 0 0 3 0x14200 bored sosplice 39236 150897 7892 0 3 0x82 thrsleep syz-fuzzer 39236 154583 7892 0 3 0x4000082 nanoslp syz-fuzzer 39236 388050 7892 0 3 0x4000082 thrsleep syz-fuzzer 39236 435517 7892 0 3 0x4000082 kqread syz-fuzzer 39236 322433 7892 0 3 0x4000082 thrsleep syz-fuzzer 39236 180236 7892 0 3 0x4000082 thrsleep syz-fuzzer 39236 334482 7892 0 3 0x4000082 thrsleep syz-fuzzer 39236 148064 7892 0 3 0x4000082 thrsleep syz-fuzzer 7892 362253 36935 0 3 0x10008a sigsusp ksh 36935 115047 99135 0 3 0x9a poll sshd 99135 167384 1 0 3 0x88 poll sshd 40130 309834 45673 74 3 0x100092 bpf pflogd 45673 444549 1 0 3 0x80 netio pflogd 22593 239758 38933 73 3 0x100090 kqread syslogd 38933 356891 1 0 3 0x100082 netio syslogd 29487 372065 1 0 3 0x100080 kqread resolvd 35116 170155 91680 77 3 0x100092 kqread dhcpleased 48338 89115 91680 77 3 0x100092 kqread dhcpleased 91680 383728 1 0 3 0x80 kqread dhcpleased 81845 27184 0 0 3 0x14200 bored smr 38439 414197 0 0 2 0x14200 zerothread 87497 66740 0 0 3 0x14200 aiodoned aiodoned 61306 87532 0 0 3 0x14200 syncer update 48949 313540 0 0 3 0x14200 cleaner cleaner 45229 107376 0 0 3 0x14200 reaper reaper 65236 206183 0 0 3 0x14200 pgdaemon pagedaemon 27183 297620 0 0 3 0x14200 bored viomb 99786 134650 0 0 3 0x40014200 acpi0 acpi0 81512 389273 0 0 3 0x40014200 idle1 46676 453455 0 0 3 0x14200 bored softnet 84904 110032 0 0 3 0x14200 bored systqmp 41666 144111 0 0 3 0x14200 bored systq 41122 155034 0 0 3 0x40014200 bored softclock 90016 41339 0 0 3 0x40014200 idle0 1 272132 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 26095 (syz-executor.2) thread 0xffff80002123d500 (152276) exclusive rwlock vcpu r = 0 (0xffff8000260ee3b0) #0 witness_lock+0x44d #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+0xbc 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 10213 6639K 7617K 78643K 136541 0 pcb 13 18K 23K 78643K 5403 0 rtable 169 20K 21K 78643K 5806 0 ifaddr 83 25K 28K 78643K 2025 0 sysctl 2 0K 4K 78643K 16 0 counters 50 34K 35K 78643K 710 0 ioctlops 0 0K 8K 78643K 7551 0 iov 0 0K 32K 78643K 2806 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1420 89K 90K 78643K 33583 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 309 0 VM map 2 1K 1K 78643K 2 0 sem 11 1K 1K 78643K 21 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 10 33K 49K 78643K 32487 0 sigio 1 0K 0K 78643K 232 0 proc 72 87K 111K 78643K 3786 0 subproc 52 3K 3K 78643K 1099 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2165 0 in_multi 51 3K 3K 78643K 2558 0 ether_multi 1 0K 0K 78643K 481 0 mrt 1 0K 0K 78643K 110 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 265 1182K 1182K 78643K 265 0 exec 0 0K 2K 78643K 7775 0 pfkey data 0 0K 1K 78643K 9 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 686 1826K 1832K 78643K 418998 0 UVM aobj 131 8K 8K 78643K 148 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 2140 0 NDP 10 0K 1K 78643K 616 0 temp 118 4224K 8320K 78643K 243203 0 kqueue 14 20K 30K 78643K 1376 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 2804 0 2801 42 41 1 5 0 8 0 rtentry 112 1590 0 1534 3 1 2 3 0 8 0 unpcb 136 25665 0 25650 206 203 3 9 0 8 2 syncache 296 104 0 104 34 34 0 1 0 8 0 tcpqe 32 354 32908 354 9 9 0 1 0 8 0 tcpcb 736 13384 0 13372 318 315 3 28 0 8 0 arp 120 238 0 228 1 0 1 1 0 8 0 inpcb 304 42459 0 42443 363 359 4 14 0 8 1 rttmr 72 13 0 13 6 6 0 1 0 8 0 nd6 48 418 0 407 1 0 1 1 0 8 0 pkpcb 40 185 0 185 25 25 0 1 0 8 0 kcovpl 48 83 0 79 1 0 1 1 0 8 0 pfstscr 40 46 0 46 4 4 0 1 0 8 0 pffrag 232 238 0 237 11 10 1 1 0 482 0 pffrnode 88 230 0 229 11 10 1 1 0 8 0 pffrent 40 1403 0 1402 11 10 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 289 0 276 8 6 2 2 0 8 0 pftag 88 30 0 26 3 2 1 1 0 8 0 pfqueue 264 3 0 0 1 0 1 1 0 8 0 pfstitem 24 138 0 136 1 0 1 1 0 8 0 pfstkey 112 221 0 219 2 1 1 2 0 8 0 pfstate 320 180 0 178 5 4 1 4 0 8 0 pfrule 1360 735 0 664 7 1 6 6 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 6637 0 6418 43 28 15 20 0 8 0 art_table 32 6638 0 6418 4 1 3 3 0 8 0 art_node 16 1583 0 1538 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 1 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 145 0 17 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 43292 0 41791 95 0 95 95 0 8 0 ffsino 272 43292 0 41791 101 0 101 101 0 8 0 nchpl 144 86702 0 85108 61 0 61 61 0 8 0 uvmvnodes 80 6174 0 0 126 0 126 126 0 8 0 vnodes 224 6174 0 0 364 0 364 364 0 8 0 namei 1024 306333 0 306333 8 7 1 1 0 8 1 percpumem 16 367 0 330 1 0 1 1 0 8 0 vcpupl 2048 457 0 0 58 0 58 58 0 8 0 vmpool 560 512 0 55 34 1 33 33 0 8 0 pfiaddrpl 120 119 0 98 5 4 1 1 0 8 0 scsiplug 72 38 0 38 12 12 0 1 0 8 0 scxspl 216 268022 0 268022 58 55 3 8 0 8 3 plimitpl 152 2501 0 2489 1 0 1 1 0 8 0 sigapl 424 32547 0 32489 8 1 7 7 0 8 0 futexpl 64 296357 0 296356 10 9 1 1 0 8 0 knotepl 112 307 0 0 4 0 4 4 0 8 0 kqueuepl 216 8587 0 8573 146 143 3 8 0 8 1 pipepl 336 6682 0 6666 175 173 2 12 0 8 0 fdescpl 496 32476 0 32453 4 1 3 4 0 8 0 filepl 152 234738 0 234583 320 310 10 19 0 8 3 lockfpl 104 8958 0 8956 16 15 1 2 0 8 0 lockfspl 48 2710 0 2708 1 0 1 1 0 8 0 sessionpl 144 101 0 88 1 0 1 1 0 8 0 pgrppl 48 355 0 342 1 0 1 1 0 8 0 ucredpl 96 26953 0 26935 1 0 1 1 0 8 0 zombiepl 144 32489 0 32489 1 0 1 1 0 8 1 processpl 1064 32547 0 32489 4 0 4 4 0 8 0 procpl 672 98110 0 98042 41 34 7 8 0 8 1 srpgc 96 82 0 82 19 19 0 1 0 8 0 sosppl 168 299 0 298 20 19 1 1 0 8 0 sockpl 480 71284 0 71250 1181 1167 14 34 0 8 8 mcl64k 65536 76 0 0 5 2 3 3 0 8 0 mcl16k 16384 49 0 0 5 2 3 3 0 8 0 mcl12k 12288 81 0 0 2 0 2 2 0 8 0 mcl9k 9216 41 0 0 2 1 1 2 0 8 0 mcl8k 8192 97 0 0 8 5 3 5 0 8 0 mcl4k 4096 98 0 0 10 7 3 6 0 8 0 mcl2k2 2112 20 0 0 2 0 2 2 0 8 0 mcl2k 2048 605 0 0 26 9 17 26 0 8 0 mtagpl 96 2151 0 0 26 0 26 26 0 8 0 mbufpl 256 7261 0 0 383 0 383 383 0 8 0 bufpl 288 56726 0 50385 454 0 454 454 0 8 0 anonpl 24 9393185 0 9370958 695 542 153 207 0 186 10 amapchunkpl 152 1038246 0 1037370 321 285 36 65 0 158 1 amappl16 200 83949 0 83171 339 290 49 54 0 8 7 amappl15 192 4577 0 4576 1 0 1 1 0 8 0 amappl14 184 2450 0 2446 1 0 1 1 0 8 0 amappl13 176 7835 0 7831 1 0 1 1 0 8 0 amappl12 168 4073 0 4068 1 0 1 1 0 8 0 amappl11 160 3639 0 3623 1 0 1 1 0 8 0 amappl10 152 2919 0 2907 1 0 1 1 0 8 0 amappl9 144 3607 0 3605 1 0 1 1 0 8 0 amappl8 136 7830 0 7676 6 0 6 6 0 8 0 amappl7 128 5992 0 5982 1 0 1 1 0 8 0 amappl6 120 3775 0 3755 1 0 1 1 0 8 0 amappl5 112 26898 0 26875 1 0 1 1 0 8 0 amappl4 104 10036 0 10003 1 0 1 1 0 8 0 amappl3 96 10057 0 10037 1 0 1 1 0 8 0 amappl2 88 11394 0 11340 3 1 2 2 0 8 0 amappl1 80 593542 0 593040 20 8 12 13 0 8 0 amappl 88 416503 0 416170 11 3 8 9 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 72 147 0 17 3 0 3 3 0 8 0 uaddrrnd 24 32988 0 32508 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 32988 0 32508 3 0 3 3 0 8 0 vmmpekpl 168 210235 0 210148 6 1 5 5 0 8 0 vmmpepl 168 2978429 0 2975078 867 705 162 181 0 357 8 vmsppl 368 32987 0 32508 45 1 44 44 0 8 0 rwobjpl 56 725591 0 717422 161 42 119 119 0 8 2 pdppl 4096 65984 0 65473 593 82 511 511 0 8 0 pvpl 32 15591080 0 15567718 1011 793 218 312 0 265 20 pmappl 248 32987 0 32508 30 0 30 30 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 2341 0 634 50 0 50 50 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace done_flush() at done_flush+0x38 vm_run(ffff800027c75bd0) at vm_run+0x304 sys/arch/amd64/amd64/vmm.c:4295 vmmioctl(a00,c0205602,ffff800027c75bd0,1,ffff80002123d500) at vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 VOP_IOCTL(fffffd806ec96130,c0205602,ffff800027c75bd0,1,fffffd807f7d7780,ffff80002123d500) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8067ea1bf8,c0205602,ffff800027c75bd0,ffff80002123d500) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002123d500,ffff800027c75ce8,ffff800027c75d40) at sys_ioctl+0x4a2 syscall(ffff800027c75db0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027c75db0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeb1375f92d0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0x7f7fffffadd0, count: -3