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(ffff80002496d0d0) at vm_run+0x302 sys/arch/amd64/amd64/vmm.c:4295 VOP_IOCTL(fffffd806ed89d68,c0205602,ffff80002496d0d0,1,fffffd807f7d87e0,ffff800026561cf0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c7142e0,c0205602,ffff80002496d0d0,ffff800026561cf0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800026561cf0,ffff80002496d1e8,ffff80002496d240) at sys_ioctl+0x49e syscall(ffff80002496d2b0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9ce40bba10, count: -7 ddb> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff8000ffff6cd8 rbp 0xffff80002496cea0 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0x20000000004 r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0x509c78c9961c8224 r11 0x65f243a70ec8aa29 r12 0xffff8000ffff6a10 r13 0xffffffff8274d570 dt_prov_static r14 0xffff8000ffff66c0 r15 0xffff80002496d0d0 rip 0xffffffff81eafad0 done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80002496cd06 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb> show proc PROC (syz-executor.1) pid=412992 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800026560550,0xffff8000265602c0 process=0xffff8000216d8408 user=0xffff800024968000, vmspace=0xfffffd8065402998 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 46718 16377 53116 0 2 0 syz-executor.3 46718 474770 53116 0 3 0x4000080 poll syz-executor.3 67041 520228 46655 0 2 0 syz-executor.2 67041 406531 46655 0 3 0x4000080 fsleep syz-executor.2 79615 17467 43166 0 2 0 syz-executor.1 *79615 412992 43166 0 7 0x4000000 syz-executor.1 43166 426143 21211 0 3 0x82 nanoslp syz-executor.1 46655 153255 21211 0 3 0x82 nanoslp syz-executor.2 30404 293546 21211 0 2 0x2 syz-executor.0 53116 367213 21211 0 3 0x82 nanoslp syz-executor.3 26217 52870 0 0 3 0x14200 acct acct 83431 97534 1 0 3 0x100083 ttyopn getty 6931 287214 0 0 3 0x14280 nfsidl nfsio 76048 204022 0 0 3 0x14280 nfsidl nfsio 73500 514318 0 0 3 0x14280 nfsidl nfsio 80733 30954 0 0 3 0x14280 nfsidl nfsio 86609 52279 0 0 3 0x14280 nfsidl nfsio 89869 16901 0 0 3 0x14280 nfsidl nfsio 78294 472330 0 0 3 0x14200 bored sosplice 21211 157666 36518 0 3 0x82 thrsleep syz-fuzzer 21211 357653 36518 0 3 0x4000082 nanoslp syz-fuzzer 21211 126408 36518 0 3 0x4000082 thrsleep syz-fuzzer 21211 63408 36518 0 3 0x4000082 kqread syz-fuzzer 21211 400111 36518 0 3 0x4000082 thrsleep syz-fuzzer 21211 23957 36518 0 3 0x4000082 thrsleep syz-fuzzer 21211 477712 36518 0 3 0x4000082 thrsleep syz-fuzzer 21211 389544 36518 0 3 0x4000082 thrsleep syz-fuzzer 36518 66026 91567 0 3 0x10008a sigsusp ksh 91567 383802 29733 0 3 0x9a poll sshd 29733 374900 1 0 3 0x88 poll sshd 8537 435448 24518 73 3 0x100090 kqread syslogd 24518 119673 1 0 3 0x100082 netio syslogd 60220 66471 1 0 3 0x100080 kqread resolvd 75590 444806 82019 77 3 0x100092 kqread dhcpleased 15689 422805 82019 77 3 0x100092 kqread dhcpleased 82019 232268 1 0 3 0x80 kqread dhcpleased 7515 156166 0 0 3 0x14200 bored smr 93233 484567 0 0 2 0x14200 zerothread 99133 389654 0 0 3 0x14200 aiodoned aiodoned 81070 48860 0 0 3 0x14200 syncer update 44267 148713 0 0 3 0x14200 cleaner cleaner 38208 341025 0 0 3 0x14200 reaper reaper 65488 518036 0 0 3 0x14200 pgdaemon pagedaemon 71590 394291 0 0 3 0x14200 bored viomb 81202 141384 0 0 3 0x40014200 acpi0 acpi0 65112 427555 0 0 3 0x14200 bored softnet 24985 257223 0 0 3 0x14200 bored systqmp 25223 511355 0 0 3 0x14200 bored systq 13177 10769 0 0 3 0x40014200 bored softclock 93327 272344 0 0 3 0x40014200 idle0 1 93945 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 10170 6427K 7066K 78643K 43249 0 pcb 15 22K 32K 78643K 9945 0 rtable 210 28K 29K 78643K 12761 0 ifaddr 82 26K 28K 78643K 3822 0 sysctl 3 1K 1K 78643K 3 0 counters 23 16K 17K 78643K 387 0 ioctlops 0 0K 4K 78643K 10162 0 iov 0 0K 28K 78643K 5973 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1355 85K 86K 78643K 14935 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 174 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 3756 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 9 29K 37K 78643K 23056 0 sigio 0 0K 0K 78643K 231 0 proc 64 55K 71K 78643K 4180 0 subproc 52 3K 3K 78643K 1572 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1202 0 in_multi 48 3K 3K 78643K 3248 0 ether_multi 1 0K 0K 78643K 420 0 mrt 8 0K 0K 78643K 86 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 295 1314K 1314K 78643K 295 0 exec 0 0K 2K 78643K 9067 0 pfkey data 0 0K 0K 78643K 4 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 596 1558K 1561K 78643K 275361 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1549 0 NDP 9 0K 1K 78643K 790 0 temp 114 4219K 4699K 78643K 261433 0 kqueue 14 22K 28K 78643K 838 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 1930 0 1927 28 27 1 3 0 8 0 rtentry 112 2151 0 2093 2 0 2 2 0 8 0 unpcb 128 46112 0 46099 248 247 1 9 0 8 0 syncache 296 54 0 54 12 12 0 1 0 8 0 tcpqe 32 39 0 39 7 7 0 1 0 8 0 tcpcb 736 8376 0 8365 324 322 2 14 0 8 0 arp 88 251 0 241 1 0 1 1 0 8 0 ipq 40 72 0 72 23 22 1 1 0 8 1 ipqe 40 1553 0 1553 23 22 1 1 0 8 1 inpcb 304 30858 0 30848 344 343 1 20 0 8 0 rttmr 72 21 0 21 7 7 0 1 0 8 0 ip6q 72 17 0 17 5 5 0 1 0 8 0 ip6af 40 27 0 27 5 5 0 1 0 8 0 nd6 48 559 0 549 1 0 1 1 0 8 0 pkpcb 40 230 0 230 17 17 0 1 0 8 0 kcovpl 48 120 0 116 1 0 1 1 0 8 0 ppxss 1152 76 0 76 13 13 0 1 0 8 0 pfstscr 40 924 0 924 7 7 0 1 0 8 0 pfosfp 40 104 0 104 1 1 0 1 0 8 0 pfosfpen 112 104 0 104 3 3 0 3 0 8 0 pfrktable 1344 3145 0 3116 17 14 3 3 0 8 0 pftag 88 385 0 374 1 0 1 1 0 8 0 pfqueue 264 12 0 8 3 2 1 1 0 8 0 pfstitem 24 414 0 414 5 5 0 1 0 8 0 pfstkey 112 1715 0 1715 7 7 0 1 0 8 0 pfstate 320 863 0 863 7 7 0 1 0 8 0 pfrule 1360 6440 0 6016 40 4 36 36 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 10787 0 10554 74 59 15 21 0 8 0 art_table 32 10789 0 10555 11 8 3 3 0 8 0 art_node 16 2139 0 2090 1 0 1 1 0 8 0 sysvmsgpl 40 78 0 75 2 1 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 3751 0 3741 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 31817 0 30323 95 1 94 94 0 8 0 ffsino 240 31817 0 30323 89 0 89 89 0 8 0 nchpl 144 65707 0 64116 61 0 61 61 0 8 0 uvmvnodes 80 7296 0 0 149 0 149 149 0 8 0 vnodes 224 7296 0 0 430 0 430 430 0 8 0 namei 1024 226884 0 226884 15 14 1 1 0 8 1 vcpupl 1984 410 0 1 52 0 52 52 0 8 0 vmpool 528 493 0 84 28 0 28 28 0 8 0 pfiaddrpl 120 5580 0 5384 10 4 6 7 0 8 0 scsiplug 72 10 0 10 3 3 0 1 0 8 0 scxspl 216 211816 0 211816 44 41 3 8 0 8 3 plimitpl 152 2452 0 2441 1 0 1 1 0 8 0 sigapl 424 22959 0 22918 7 1 6 7 0 8 0 futexpl 64 250450 0 250449 17 16 1 1 0 8 0 knotepl 112 12555 0 12505 6 4 2 4 0 8 0 kqueuepl 184 5657 0 5644 101 100 1 9 0 8 0 pipepl 304 3874 0 3858 88 86 2 7 0 8 0 fdescpl 432 22922 0 22902 3 0 3 3 0 8 0 filepl 120 197564 0 197412 294 287 7 15 0 8 2 lockfpl 104 5788 0 5786 9 8 1 2 0 8 0 lockfspl 48 1676 0 1674 1 0 1 1 0 8 0 sessionpl 144 138 0 126 1 0 1 1 0 8 0 pgrppl 48 166 0 154 1 0 1 1 0 8 0 ucredpl 96 20079 0 20068 1 0 1 1 0 8 0 zombiepl 144 22918 0 22918 3 2 1 1 0 8 1 processpl 1000 22959 0 22918 8 1 7 8 0 8 0 procpl 672 57869 0 57818 23 17 6 8 0 8 0 sosppl 168 179 0 179 33 33 0 1 0 8 0 sockpl 448 79233 0 79207 1496 1492 4 32 0 8 1 mcl64k 65536 1736 0 1736 50 49 1 1 0 8 1 mcl16k 16384 292 0 292 65 65 0 1 0 8 0 mcl12k 12288 636 0 636 58 57 1 1 0 8 1 mcl9k 9216 298 0 298 58 57 1 1 0 8 1 mcl8k 8192 2825 0 2825 38 37 1 1 0 8 1 mcl4k 4096 2571 0 2571 34 33 1 1 0 8 1 mcl2k2 2112 148 0 148 60 59 1 1 0 8 1 mcl2k 2048 133773 0 133731 64 57 7 20 0 8 0 mtagpl 96 3893 0 3819 46 44 2 10 0 8 0 mbufpl 256 455028 0 454713 1084 1061 23 479 0 8 1 bufpl 288 48012 0 40715 522 0 522 522 0 8 0 anonpl 24 6620651 0 6596082 572 396 176 189 0 188 21 amapchunkpl 152 743754 0 743049 319 289 30 43 0 158 1 amappl16 200 77453 0 76369 284 214 70 77 0 8 7 amappl15 192 4905 0 4898 1 0 1 1 0 8 0 amappl14 184 2779 0 2777 1 0 1 1 0 8 0 amappl13 176 3351 0 3349 1 0 1 1 0 8 0 amappl12 168 3139 0 3132 1 0 1 1 0 8 0 amappl11 160 3434 0 3421 1 0 1 1 0 8 0 amappl10 152 3112 0 3109 1 0 1 1 0 8 0 amappl9 144 1865 0 1863 1 0 1 1 0 8 0 amappl8 136 5217 0 5114 4 0 4 4 0 8 0 amappl7 128 3292 0 3282 1 0 1 1 0 8 0 amappl6 120 2265 0 2246 1 0 1 1 0 8 0 amappl5 112 20615 0 20603 1 0 1 1 0 8 0 amappl4 104 11232 0 11193 12 10 2 2 0 8 0 amappl3 96 5460 0 5442 1 0 1 1 0 8 0 amappl2 88 7763 0 7699 2 0 2 2 0 8 0 amappl1 80 401029 0 400565 13 2 11 12 0 8 0 amappl 88 272551 0 272259 8 1 7 8 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 23415 0 22986 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 23415 0 22986 3 0 3 3 0 8 0 vmmpekpl 168 152722 0 152659 3 0 3 3 0 8 0 vmmpepl 168 2129624 0 2126259 722 554 168 187 0 357 8 vmsppl 272 23414 0 22986 35 6 29 29 0 8 0 rwobjpl 24 504724 0 495240 87 28 59 59 0 8 1 pdppl 4096 46836 0 46381 630 173 457 457 0 8 2 pvpl 32 11459479 0 11437769 722 509 213 247 0 265 20 pmappl 216 23414 0 22986 24 0 24 24 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 4663 0 3376 54 15 39 40 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff80002496d0d0) at vm_run+0x302 sys/arch/amd64/amd64/vmm.c:4295 VOP_IOCTL(fffffd806ed89d68,c0205602,ffff80002496d0d0,1,fffffd807f7d87e0,ffff800026561cf0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c7142e0,c0205602,ffff80002496d0d0,ffff800026561cf0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800026561cf0,ffff80002496d1e8,ffff80002496d240) at sys_ioctl+0x49e syscall(ffff80002496d2b0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9ce40bba10, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff80002496d0d0) at vm_run+0x302 sys/arch/amd64/amd64/vmm.c:4295 VOP_IOCTL(fffffd806ed89d68,c0205602,ffff80002496d0d0,1,fffffd807f7d87e0,ffff800026561cf0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c7142e0,c0205602,ffff80002496d0d0,ffff800026561cf0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800026561cf0,ffff80002496d1e8,ffff80002496d240) at sys_ioctl+0x49e syscall(ffff80002496d2b0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9ce40bba10, count: -7