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(ffff8000378ffab0) at vm_run+0x163 vmmioctl(a00,c0205602,ffff8000378ffab0,1,ffff80002a63caa0) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd8073cf8000,c0205602,ffff8000378ffab0,1,fffffd807f7d74e0,ffff80002a63caa0) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069747270,c0205602,ffff8000378ffab0,ffff80002a63caa0) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a63caa0,ffff8000378ffbc0,ffff8000378ffc10) at sys_ioctl+0x49e syscall(ffff8000378ffc80) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd125f7e6f40, count: -8 ddb> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff8000329d6630 rbp 0xffff8000378ff800 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffc r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0x793eeabfed023093 r11 0x2f5d9718e5e8b3e5 r12 0xffff8000329d63a8 r13 0xffff8000378ff736 r14 0xffff8000329d6000 r15 0x246 rip 0xffffffff811796eb done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff8000378ff666 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb> show proc PROC (syz-executor.4) tid=425786 pid=11887 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a63c7f8,0xffff80002a6bf020 process=0xffff80003441a000 user=0xffff8000378fa000, vmspace=0xfffffd807a6dc5f0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 30881 145310 98052 0 2 0 syz-executor.2 30881 279244 98052 0 3 0x4000080 fsleep syz-executor.2 11887 239832 96224 0 2 0 syz-executor.4 *11887 425786 96224 0 7 0x4000000 syz-executor.4 26499 328312 60712 0 2 0 syz-executor.5 26499 369854 60712 0 3 0x4000080 fsleep syz-executor.5 26499 138430 60712 0 3 0x4000080 pipewr syz-executor.5 26499 439788 60712 0 3 0x4000080 fsleep syz-executor.5 14593 349195 8190 0 2 0 syz-executor.3 14593 86569 8190 0 3 0x4000080 netio syz-executor.3 51540 214079 50452 0 2 0 syz-executor.7 51540 85316 50452 0 3 0x4000080 fsleep syz-executor.7 96224 88362 87960 0 3 0x82 nanoslp syz-executor.4 60712 161847 87960 0 3 0x82 nanoslp syz-executor.5 91169 88895 87960 0 2 0x2 syz-executor.1 21301 40552 0 0 3 0x14200 acct acct 50452 218995 87960 0 3 0x82 nanoslp syz-executor.7 8190 302627 87960 0 3 0x82 nanoslp syz-executor.3 83039 486926 0 0 3 0x14280 nfsidl nfsio 30298 360293 0 0 3 0x14280 nfsidl nfsio 19279 125276 0 0 3 0x14280 nfsidl nfsio 18580 493074 0 0 3 0x14280 nfsidl nfsio 16739 39937 0 0 3 0x14280 nfsidl nfsio 53591 6444 0 0 3 0x14280 nfsidl nfsio 730 401554 0 0 3 0x14280 nfsidl nfsio 40659 255669 0 0 3 0x14280 nfsidl nfsio 70544 514768 0 0 3 0x14280 nfsidl nfsio 21737 85056 0 0 3 0x14280 nfsidl nfsio 81515 454635 0 0 3 0x14280 nfsidl nfsio 65811 441110 0 0 3 0x14280 nfsidl nfsio 48401 335516 0 0 3 0x14280 nfsidl nfsio 21813 398839 0 0 3 0x14280 nfsidl nfsio 19816 436231 0 0 3 0x14280 nfsidl nfsio 55743 169795 0 0 3 0x14280 nfsidl nfsio 24359 416700 0 0 3 0x14280 nfsidl nfsio 75100 43385 0 0 3 0x14280 nfsidl nfsio 9688 387128 0 0 3 0x14280 nfsidl nfsio 93480 514760 0 0 3 0x14280 nfsidl nfsio 24838 47546 0 0 3 0x14200 bored sosplice 50481 15667 87960 0 2 0x2 syz-executor.6 98052 130277 87960 0 3 0x82 nanoslp syz-executor.2 57156 397238 87960 0 2 0x2 syz-executor.0 87960 183319 35635 0 3 0x2000082 thrsleep syz-fuzzer 87960 249141 35635 0 3 0x6000082 nanoslp syz-fuzzer 87960 23520 35635 0 3 0x6000082 thrsleep syz-fuzzer 87960 433981 35635 0 3 0x6000082 wait syz-fuzzer 87960 437359 35635 0 3 0x6000082 thrsleep syz-fuzzer 87960 507933 35635 0 3 0x6000082 wait syz-fuzzer 87960 436423 35635 0 3 0x6000082 wait syz-fuzzer 87960 115298 35635 0 3 0x6000082 wait syz-fuzzer 87960 429709 35635 0 3 0x6000082 wait syz-fuzzer 87960 507183 35635 0 3 0x6000082 thrsleep syz-fuzzer 87960 298295 35635 0 3 0x6000082 wait syz-fuzzer 87960 383407 35635 0 3 0x6000082 wait syz-fuzzer 87960 177931 35635 0 3 0x6000082 wait syz-fuzzer 87960 280481 35635 0 3 0x6000082 kqread syz-fuzzer 35635 346240 31851 0 3 0x10008a sigsusp ksh 31851 438096 8011 0 3 0x9a kqread sshd 75559 341601 1 0 3 0x100083 ttyopn getty 8011 213953 1 0 3 0x88 kqread sshd 63788 452227 29006 73 3 0x1100090 kqread syslogd 29006 400671 1 0 3 0x100082 netio syslogd 48649 2848 1 0 3 0x100080 kqread resolvd 24021 445154 17652 77 3 0x100092 kqread dhcpleased 11863 431171 17652 77 3 0x100092 kqread dhcpleased 17652 172312 1 0 3 0x80 kqread dhcpleased 50454 192885 0 0 3 0x14200 bored smr 37981 262949 0 0 2 0x14200 zerothread 37032 198103 0 0 3 0x14200 aiodoned aiodoned 84698 365394 0 0 3 0x14200 syncer update 3024 55677 0 0 3 0x14200 cleaner cleaner 45112 124203 0 0 3 0x14200 reaper reaper 70052 385956 0 0 3 0x14200 pgdaemon pagedaemon 38965 483954 0 0 3 0x14200 bored viomb 71244 172847 0 0 3 0x40014200 acpi0 acpi0 29656 418760 0 0 3 0x14200 bored softnet3 97072 492845 0 0 3 0x14200 bored softnet2 48040 1966 0 0 3 0x14200 bored softnet1 22382 95469 0 0 2 0x14200 softnet0 77798 369841 0 0 3 0x14200 bored systqmp 41650 184541 0 0 3 0x14200 bored systq 54045 161336 0 0 3 0x40014200 tmoslp softclock 26937 477649 0 0 3 0x40014200 idle0 1 355024 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 10203 6540K 6882K 166960K 16926 0 pcb 13 20K 23K 166960K 336 0 rtable 200 14K 15K 166960K 675 0 pf 28 8K 9K 166960K 109 0 ifaddr 36 10K 11K 166960K 108 0 ifgroup 49 2K 2K 166960K 168 0 sysctl 2 0K 0K 166960K 2 0 counters 27 17K 17K 166960K 64 0 ioctlops 0 0K 2K 166960K 678 0 iov 1 2K 14K 166960K 311 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1472 92K 93K 166960K 3529 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 130 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 1116 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 69K 166960K 3952 0 sigio 0 0K 0K 166960K 127 0 proc 57 59K 75K 166960K 760 0 subproc 104 6K 6K 166960K 195 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 60 0 in_multi 77 5K 7K 166960K 191 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 193 864K 864K 166960K 193 0 exec 0 0K 1K 166960K 686 0 pfkey data 0 0K 0K 166960K 7 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 351 228K 229K 166960K 37756 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 90 0 NDP 10 0K 1K 166960K 79 0 temp 76 5922K 5996K 166960K 24197 0 kqueue 12 18K 24K 166960K 223 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 120 181 0 178 3 2 1 3 0 8 0 rtentry 112 202 0 112 4 0 4 4 0 8 0 unpcb 144 3518 0 3503 30 24 6 6 0 8 5 syncache 312 42 0 42 8 8 0 1 0 8 0 tcpqe 32 98 0 98 6 6 0 1 0 8 0 tcpcb 808 2549 0 2533 48 44 4 16 0 8 1 arp 88 32 0 18 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 336 4621 0 4602 60 53 7 20 0 8 4 nd6 104 53 0 33 1 0 1 1 0 8 0 pkpcb 40 52 0 52 4 4 0 1 0 8 0 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1160 18 0 18 4 4 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 875 0 501 35 8 27 29 0 8 3 art_table 32 876 0 501 4 0 4 4 0 8 0 art_node 16 201 0 119 1 0 1 1 0 8 0 sysvmsgpl 40 95 0 64 1 0 1 1 0 8 0 semupl 112 10 0 10 1 1 0 1 0 8 0 semapl 112 1109 0 1099 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6110 0 4664 91 0 91 91 0 8 0 ffsino 240 6110 0 4664 86 0 86 86 0 8 0 nchpl 144 12077 0 10434 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 36403 0 36400 4 3 1 3 0 8 0 vcpupl 2048 49 0 0 7 0 7 7 0 8 0 vmpool 664 53 0 4 6 1 5 5 0 8 0 kstatmem 264 94 0 74 2 0 2 2 0 8 0 scxspl 216 33213 0 33213 13 12 1 8 1 8 1 plimitpl 152 300 0 285 1 0 1 1 0 8 0 sigapl 424 4261 0 4197 8 0 8 8 0 8 0 futexpl 64 55213 0 55209 1 0 1 1 0 8 0 knotepl 120 38833 0 38753 13 10 3 11 0 8 0 kqueuepl 184 709 0 701 11 10 1 4 0 8 0 pipepl 288 1518 0 1489 31 26 5 11 0 8 2 fdescpl 432 4221 0 4195 4 0 4 4 0 8 0 filepl 120 26578 0 26339 41 27 14 17 0 8 6 lockfpl 104 1350 0 1348 3 2 1 2 0 8 0 lockfspl 48 539 0 537 1 0 1 1 0 8 0 sessionpl 144 30 0 14 1 0 1 1 0 8 0 pgrppl 48 107 0 91 1 0 1 1 0 8 0 ucredpl 104 2718 0 2706 1 0 1 1 0 8 0 zombiepl 144 4197 0 4197 1 0 1 1 0 8 1 processpl 1008 4261 0 4197 10 1 9 9 0 8 0 procpl 680 9620 0 9536 10 2 8 9 0 8 0 sosppl 168 62 0 59 3 2 1 1 0 8 0 sockpl 456 8372 0 8335 159 145 14 38 0 8 8 mcl64k 65536 130 0 130 4 3 1 1 0 8 1 mcl16k 16384 88 0 88 5 4 1 1 0 8 1 mcl12k 12288 137 0 137 5 4 1 1 0 8 1 mcl9k 9216 70 0 70 5 4 1 1 0 8 1 mcl8k 8192 704 0 703 2 1 1 1 0 8 0 mcl4k 4096 488 0 488 6 3 3 3 0 8 3 mcl2k2 2112 392 0 392 2 1 1 1 0 8 1 mcl2k 2048 75270 0 75200 42 31 11 35 0 8 0 mtagpl 96 515 0 319 11 4 7 7 0 8 0 mbufpl 256 157459 0 157102 51 18 33 33 0 8 4 bufpl 288 9491 0 3097 458 0 458 458 0 8 0 anonpl 24 739155 0 724237 120 22 98 105 0 188 1 amapchunkpl 152 134130 0 133234 64 23 41 43 0 158 1 amappl16 200 10887 0 10440 31 7 24 25 0 8 0 amappl15 192 17 0 16 1 0 1 1 0 8 0 amappl14 184 179 0 167 2 1 1 2 0 8 0 amappl13 176 21 0 21 1 1 0 1 0 8 0 amappl12 168 4962 0 4932 2 0 2 2 0 8 0 amappl11 160 57 0 46 1 0 1 1 0 8 0 amappl10 152 40 0 30 1 0 1 1 0 8 0 amappl9 144 176 0 175 1 0 1 1 0 8 0 amappl8 136 228 0 171 2 0 2 2 0 8 0 amappl7 128 191 0 168 2 0 2 2 0 8 0 amappl6 120 408 0 399 1 0 1 1 0 8 0 amappl5 112 179 0 171 1 0 1 1 0 8 0 amappl4 104 507 0 487 2 1 1 2 0 8 0 amappl3 96 23854 0 23772 3 0 3 3 0 8 0 amappl2 88 5250 0 5180 3 1 2 3 0 8 0 amappl1 80 23760 0 23260 22 11 11 22 0 8 0 amappl 88 37045 0 36817 6 0 6 6 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 4274 0 4199 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4274 0 4199 1 0 1 1 0 8 0 vmmpekpl 168 35047 0 34980 4 0 4 4 0 8 0 vmmpepl 168 261964 0 259750 155 50 105 117 0 357 0 vmsppl 368 4273 0 4199 7 0 7 7 0 8 0 rwobjpl 24 71683 0 64177 46 0 46 46 0 8 0 pdppl 4096 8554 0 8447 247 135 112 112 0 8 5 pvpl 32 1575110 0 1554271 335 156 179 335 0 265 2 pmappl 216 4273 0 4199 5 0 5 5 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1209 0 341 26 0 26 26 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff8000378ffab0) at vm_run+0x163 vmmioctl(a00,c0205602,ffff8000378ffab0,1,ffff80002a63caa0) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd8073cf8000,c0205602,ffff8000378ffab0,1,fffffd807f7d74e0,ffff80002a63caa0) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069747270,c0205602,ffff8000378ffab0,ffff80002a63caa0) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a63caa0,ffff8000378ffbc0,ffff8000378ffc10) at sys_ioctl+0x49e syscall(ffff8000378ffc80) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd125f7e6f40, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff8000378ffab0) at vm_run+0x163 vmmioctl(a00,c0205602,ffff8000378ffab0,1,ffff80002a63caa0) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd8073cf8000,c0205602,ffff8000378ffab0,1,fffffd807f7d74e0,ffff80002a63caa0) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069747270,c0205602,ffff8000378ffab0,ffff80002a63caa0) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a63caa0,ffff8000378ffbc0,ffff8000378ffc10) at sys_ioctl+0x49e syscall(ffff8000378ffc80) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd125f7e6f40, count: -8