kernel: protection fault trap, code=0 Stopped at done_flush+0x38: movl %eax,%dr6 ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace done_flush() at done_flush+0x38 vm_run(ffff80002a741d10) at vm_run+0x163 vmmioctl(a00,c0205602,ffff80002a741d10,1,ffff80002a64f558) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806e7a4288,c0205602,ffff80002a741d10,1,fffffd807f7d7958,ffff80002a64f558) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80712c15b0,c0205602,ffff80002a741d10,ffff80002a64f558) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a64f558,ffff80002a741e20,ffff80002a741e70) at sys_ioctl+0x49e syscall(ffff80002a741ee0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4120d4c4470, count: -8 ddb> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff80002db9d630 rbp 0xffff80002a741a60 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffc r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0xe0c1076ccd0b6f5e r11 0xbae1b9cd26c30e16 r12 0xffff80002db9d3a8 r13 0xffff80002a741996 r14 0xffff80002db9d000 r15 0x246 rip 0xffffffff811796eb done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80002a7418c6 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb> show proc PROC (syz-executor.5) tid=343657 pid=41689 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a64e568,0xffff80002a64eac8 process=0xffff80002a6953c0 user=0xffff80002a73c000, vmspace=0xfffffd80656de190 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 27819 51665 33022 0 2 0 syz-executor.2 65988 28071 46469 0 2 0 syz-executor.7 65988 147331 46469 0 3 0x4000080 fsleep syz-executor.7 66517 287427 2387 0 2 0 syz-executor.1 66517 256371 2387 0 3 0x4000080 fsleep syz-executor.1 41689 425405 3560 0 2 0 syz-executor.5 *41689 343657 3560 0 7 0x4000000 syz-executor.5 41689 154167 3560 0 3 0x4000080 fsleep syz-executor.5 17620 388930 6883 0 2 0 syz-executor.4 17620 297218 6883 0 3 0x4000080 fsleep syz-executor.4 17620 296169 6883 0 3 0x4000080 fsleep syz-executor.4 1963 225706 51816 0 3 0x82 nanoslp syz-executor.3 33022 73678 51816 0 3 0x82 nanoslp syz-executor.2 96190 400133 51816 0 3 0x82 nanoslp syz-executor.0 3560 291537 51816 0 3 0x82 nanoslp syz-executor.5 93756 19306 51816 0 2 0x2 syz-executor.6 6959 474599 1 0 3 0x100083 ttyin getty 13648 120198 0 0 3 0x14280 nfsidl nfsio 16566 412954 0 0 3 0x14280 nfsidl nfsio 75526 445171 0 0 3 0x14280 nfsidl nfsio 19683 165427 0 0 3 0x14280 nfsidl nfsio 96694 496893 0 0 3 0x14280 nfsidl nfsio 17430 341049 0 0 3 0x14280 nfsidl nfsio 88606 97474 0 0 3 0x14280 nfsidl nfsio 92288 422780 0 0 3 0x14280 nfsidl nfsio 4234 36308 0 0 3 0x14280 nfsidl nfsio 50390 477989 0 0 3 0x14280 nfsidl nfsio 78484 23955 0 0 3 0x14280 nfsidl nfsio 66428 478581 0 0 3 0x14280 nfsidl nfsio 33075 195496 0 0 3 0x14280 nfsidl nfsio 74897 161962 0 0 3 0x14280 nfsidl nfsio 67389 15217 0 0 3 0x14280 nfsidl nfsio 61747 454968 0 0 3 0x14280 nfsidl nfsio 12923 340402 0 0 3 0x14280 nfsidl nfsio 87554 406304 0 0 3 0x14280 nfsidl nfsio 69051 108480 0 0 3 0x14280 nfsidl nfsio 77078 48530 0 0 3 0x14280 nfsidl nfsio 46469 187495 51816 0 3 0x82 nanoslp syz-executor.7 80740 413996 0 0 3 0x14200 bored sosplice 6883 304550 51816 0 3 0x82 nanoslp syz-executor.4 2387 232130 51816 0 3 0x82 nanoslp syz-executor.1 51816 324325 22542 0 3 0x2000082 wait syz-fuzzer 51816 1499 22542 0 3 0x6000082 nanoslp syz-fuzzer 51816 266648 22542 0 3 0x6000082 thrsleep syz-fuzzer 51816 372755 22542 0 3 0x6000082 wait syz-fuzzer 51816 431707 22542 0 3 0x6000082 thrsleep syz-fuzzer 51816 344640 22542 0 3 0x6000082 thrsleep syz-fuzzer 51816 463757 22542 0 3 0x6000082 wait syz-fuzzer 51816 245161 22542 0 3 0x6000082 wait syz-fuzzer 51816 506836 22542 0 3 0x6000082 kqread syz-fuzzer 51816 222822 22542 0 3 0x6000082 thrsleep syz-fuzzer 51816 181868 22542 0 3 0x6000082 wait syz-fuzzer 51816 458113 22542 0 3 0x6000082 wait syz-fuzzer 51816 418438 22542 0 3 0x6000082 wait syz-fuzzer 51816 150838 22542 0 3 0x6000082 wait syz-fuzzer 22542 294432 62250 0 3 0x10008a sigsusp ksh 62250 195711 74542 0 3 0x9a kqread sshd 74542 45581 1 0 3 0x88 kqread sshd 97495 23677 69214 73 3 0x1100090 kqread syslogd 69214 287228 1 0 3 0x100082 netio syslogd 3984 182613 1 0 3 0x100080 kqread resolvd 83359 70951 67658 77 3 0x100092 kqread dhcpleased 68435 243116 67658 77 3 0x100092 kqread dhcpleased 67658 215892 1 0 3 0x80 kqread dhcpleased 50730 192136 0 0 3 0x14200 bored smr 72078 83306 0 0 2 0x14200 zerothread 45108 393668 0 0 3 0x14200 aiodoned aiodoned 59882 307276 0 0 3 0x14200 syncer update 96232 3803 0 0 3 0x14200 cleaner cleaner 239 148279 0 0 3 0x14200 reaper reaper 69579 197788 0 0 3 0x14200 pgdaemon pagedaemon 24252 370804 0 0 3 0x14200 bored viomb 81626 342340 0 0 3 0x40014200 acpi0 acpi0 3790 329396 0 0 3 0x14200 bored softnet3 82127 126746 0 0 3 0x14200 bored softnet2 77059 365123 0 0 3 0x14200 bored softnet1 17288 310729 0 0 3 0x14200 bored softnet0 72725 397112 0 0 3 0x14200 bored systqmp 92122 253400 0 0 3 0x14200 bored systq 77203 434777 0 0 3 0x40014200 tmoslp softclock 9339 117617 0 0 3 0x40014200 idle0 1 128267 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10194 6432K 8597K 166960K 21489 0 pcb 13 16K 18K 166960K 472 0 rtable 197 14K 16K 166960K 1096 0 pf 32 9K 10K 166960K 136 0 ifaddr 37 10K 11K 166960K 133 0 ifgroup 55 2K 2K 166960K 211 0 sysctl 3 0K 0K 166960K 3 0 counters 29 17K 17K 166960K 77 0 ioctlops 0 0K 2K 166960K 437 0 iov 0 0K 24K 166960K 750 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1600 100K 100K 166960K 5612 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 38 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 405 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 69K 166960K 5766 0 sigio 0 0K 0K 166960K 171 0 proc 58 59K 75K 166960K 1027 0 subproc 104 6K 6K 166960K 253 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 162 0 in_multi 78 5K 7K 166960K 265 0 ether_multi 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 1357 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 pagedep 1 8K 8K 166960K 1 0 inodedep 1 32K 32K 166960K 1 0 newblk 1 0K 0K 166960K 1 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 403 342K 352K 166960K 55280 0 UVM aobj 131 4K 4K 166960K 134 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 102 0 NDP 12 0K 1K 166960K 100 0 temp 74 5920K 6007K 166960K 45735 0 kqueue 12 18K 26K 166960K 472 0 SYN cache 2 1236K 1244K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 209 0 206 2 1 1 2 0 8 0 rtentry 112 256 0 169 4 1 3 4 0 8 0 unpcb 144 4067 0 4054 49 48 1 10 0 8 0 syncache 312 61 0 61 11 11 0 1 0 8 0 tcpqe 32 351 0 351 8 8 0 1 0 8 0 tcpcb 808 1498 0 1494 44 43 1 11 0 8 0 arp 88 44 0 32 1 0 1 1 0 8 0 ipq 40 13 0 13 4 3 1 1 0 8 1 ipqe 40 39 0 39 4 3 1 1 0 8 1 inpcb 336 5205 0 5198 67 58 9 14 0 8 8 nd6 104 67 0 48 1 0 1 1 0 8 0 pkpcb 40 14 0 14 3 3 0 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 ppxss 1160 23 0 22 6 5 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1075 0 659 34 6 28 29 0 8 2 art_table 32 1076 0 659 4 0 4 4 0 8 0 art_node 16 255 0 175 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 399 0 389 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 9096 0 7618 93 0 93 93 0 8 0 ffsino 240 9096 0 7618 88 0 88 88 0 8 0 nchpl 144 16753 0 15104 63 0 63 63 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 58578 0 58577 6 5 1 3 0 8 0 vcpupl 2048 104 0 0 13 0 13 13 0 8 0 vmpool 664 114 0 10 9 0 9 9 0 8 0 kstatmem 264 120 0 96 2 0 2 2 0 8 0 scxspl 216 50829 0 50829 24 22 2 8 1 8 2 plimitpl 152 625 0 610 1 0 1 1 0 8 0 sigapl 424 6068 0 6003 8 0 8 8 0 8 0 futexpl 64 56880 0 56875 1 0 1 1 0 8 0 knotepl 120 60105 0 60023 17 14 3 9 0 8 0 kqueuepl 184 4518 0 4510 48 47 1 9 0 8 0 pipepl 288 1723 0 1695 33 30 3 7 0 8 0 fdescpl 432 6029 0 6002 4 0 4 4 0 8 0 filepl 120 41905 0 41668 72 61 11 18 0 8 2 lockfpl 104 1477 0 1475 3 2 1 2 0 8 0 lockfspl 48 581 0 579 1 0 1 1 0 8 0 sessionpl 144 38 0 22 1 0 1 1 0 8 0 pgrppl 48 82 0 66 1 0 1 1 0 8 0 ucredpl 104 4396 0 4377 1 0 1 1 0 8 0 zombiepl 144 6005 0 6003 1 0 1 1 0 8 0 processpl 1008 6068 0 6003 10 1 9 9 0 8 0 procpl 680 14671 0 14587 12 4 8 9 0 8 0 sosppl 168 84 0 84 4 3 1 1 0 8 1 sockpl 456 9495 0 9469 198 184 14 35 0 8 8 mcl64k 65536 245 0 245 12 11 1 1 0 8 1 mcl16k 16384 147 0 147 12 11 1 1 0 8 1 mcl12k 12288 227 0 227 14 13 1 1 0 8 1 mcl9k 9216 97 0 97 14 13 1 1 0 8 1 mcl8k 8192 599 0 599 10 9 1 1 0 8 1 mcl4k 4096 595 0 595 8 7 1 3 0 8 1 mcl2k2 2112 21 0 21 10 9 1 1 0 8 1 mcl2k 2048 80445 0 80390 55 46 9 32 0 8 0 mtagpl 96 1021 0 767 13 6 7 8 0 8 0 mbufpl 256 169020 0 168688 97 72 25 68 0 8 1 bufpl 288 15187 0 8790 458 0 458 458 0 8 0 anonpl 24 727299 0 713241 164 65 99 123 0 188 5 amapchunkpl 152 178083 0 177220 82 41 41 46 0 158 3 amappl16 200 15835 0 15396 68 38 30 43 0 8 6 amappl15 192 15 0 15 2 2 0 1 0 8 0 amappl14 184 198 0 183 2 1 1 2 0 8 0 amappl13 176 16 0 15 2 1 1 1 0 8 0 amappl12 168 6819 0 6789 2 0 2 2 0 8 0 amappl11 160 55 0 45 1 0 1 1 0 8 0 amappl10 152 58 0 47 2 1 1 1 0 8 0 amappl9 144 211 0 211 14 13 1 1 0 8 1 amappl8 136 308 0 236 3 0 3 3 0 8 0 amappl7 128 215 0 192 2 0 2 2 0 8 0 amappl6 120 481 0 473 1 0 1 1 0 8 0 amappl5 112 228 0 219 1 0 1 1 0 8 0 amappl4 104 574 0 546 2 1 1 2 0 8 0 amappl3 96 34793 0 34707 3 0 3 3 0 8 0 amappl2 88 6710 0 6635 3 1 2 3 0 8 0 amappl1 80 30147 0 29636 22 11 11 22 0 8 0 amappl 88 54498 0 54256 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 6143 0 6012 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6143 0 6012 1 0 1 1 0 8 0 vmmpekpl 168 46824 0 46741 4 0 4 4 0 8 0 vmmpepl 168 369138 0 366805 202 83 119 125 0 357 9 vmsppl 368 6142 0 6012 12 0 12 12 0 8 0 rwobjpl 24 97120 0 89585 48 1 47 47 0 8 0 pdppl 4096 12292 0 12128 472 305 167 167 0 8 3 pvpl 32 1776583 0 1757295 389 211 178 337 0 265 11 pmappl 216 6142 0 6012 8 0 8 8 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1544 0 620 28 0 28 28 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff80002a741d10) at vm_run+0x163 vmmioctl(a00,c0205602,ffff80002a741d10,1,ffff80002a64f558) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806e7a4288,c0205602,ffff80002a741d10,1,fffffd807f7d7958,ffff80002a64f558) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80712c15b0,c0205602,ffff80002a741d10,ffff80002a64f558) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a64f558,ffff80002a741e20,ffff80002a741e70) at sys_ioctl+0x49e syscall(ffff80002a741ee0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4120d4c4470, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff80002a741d10) at vm_run+0x163 vmmioctl(a00,c0205602,ffff80002a741d10,1,ffff80002a64f558) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806e7a4288,c0205602,ffff80002a741d10,1,fffffd807f7d7958,ffff80002a64f558) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80712c15b0,c0205602,ffff80002a741d10,ffff80002a64f558) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a64f558,ffff80002a741e20,ffff80002a741e70) at sys_ioctl+0x49e syscall(ffff80002a741ee0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4120d4c4470, count: -8