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(ffff80002e8052c0) at vm_run+0x302 sys/arch/amd64/amd64/vmm.c:4463 vmmioctl(a00,c0205602,ffff80002e8052c0,1,ffff8000ffff87e8) at vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:656 VOP_IOCTL(fffffd806e8153c8,c0205602,ffff80002e8052c0,1,fffffd807f7d73c0,ffff8000ffff87e8) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8068dbcc40,c0205602,ffff80002e8052c0,ffff8000ffff87e8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff87e8,ffff80002e8053d8,ffff80002e805430) at sys_ioctl+0x49e syscall(ffff80002e8054a0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa5fb85204e0, count: -8 ddb> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff80002650cdd8 rbp 0xffff80002e805020 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0x7fffffffffffffff r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0xfa3146faf9c02857 r11 0xb18fdf0386983a43 r12 0xffff80002650cb10 r13 0xffffffff82984c20 dt_prov_static r14 0xffff80002650c7c0 r15 0xffff80002e8052c0 rip 0xffffffff816c5f90 done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80002e804e86 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb> show proc PROC (syz-executor.2) pid=33996 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff9268,0xffff800024ac7a50 process=0xffff800021634028 user=0xffff80002e800000, vmspace=0xfffffd807e2a4778 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 3243 448609 58321 0 2 0 syz-executor.6 85068 343189 75956 0 2 0 syz-executor.5 85068 499339 75956 0 2 0x4000000 syz-executor.5 85068 379227 75956 0 3 0x4000080 fsleep syz-executor.5 92841 20683 58093 0 2 0 syz-executor.7 92841 138152 58093 0 3 0x4000080 fsleep syz-executor.7 30791 409050 92939 0 2 0 syz-executor.4 30791 472867 92939 0 3 0x4000080 fsleep syz-executor.4 36779 140980 46852 0 2 0 syz-executor.2 *36779 33996 46852 0 7 0x4000000 syz-executor.2 46852 406757 2749 0 2 0x482 syz-executor.2 58093 321429 2749 0 3 0x82 nanoslp syz-executor.7 75956 267802 2749 0 3 0x82 nanoslp syz-executor.5 83497 102172 0 0 3 0x14200 acct acct 71766 485580 2749 0 2 0x2 syz-executor.0 65928 251828 2749 0 2 0x482 syz-executor.3 92939 54481 2749 0 3 0x82 nanoslp syz-executor.4 58321 483469 2749 0 3 0x82 nanoslp syz-executor.6 5113 372372 2749 0 3 0x82 nanoslp syz-executor.1 79700 353944 1 0 3 0x100083 ttyin getty 71110 253480 0 0 3 0x14280 nfsidl nfsio 44947 388826 0 0 3 0x14280 nfsidl nfsio 24941 390002 0 0 3 0x14280 nfsidl nfsio 66546 345053 0 0 3 0x14280 nfsidl nfsio 39099 352094 0 0 3 0x14280 nfsidl nfsio 50814 129412 0 0 3 0x14280 nfsidl nfsio 76056 403781 0 0 3 0x14200 bored sosplice 2749 186008 80491 0 3 0x82 thrsleep syz-fuzzer 2749 131022 80491 0 2 0x4000482 syz-fuzzer 2749 337377 80491 0 3 0x4000082 thrsleep syz-fuzzer 2749 322297 80491 0 3 0x4000082 thrsleep syz-fuzzer 2749 450882 80491 0 3 0x4000082 thrsleep syz-fuzzer 2749 443754 80491 0 3 0x4000082 thrsleep syz-fuzzer 2749 145005 80491 0 3 0x4000082 kqread syz-fuzzer 2749 369628 80491 0 3 0x4000082 thrsleep syz-fuzzer 80491 2640 68431 0 3 0x10008a sigsusp ksh 68431 28774 73484 0 3 0x9a kqread sshd 73484 305419 1 0 3 0x88 kqread sshd 42563 15463 62268 73 3 0x1100090 kqread syslogd 62268 66534 1 0 3 0x100082 netio syslogd 68046 329687 1 0 3 0x100080 kqread resolvd 83099 201415 35667 77 3 0x100092 kqread dhcpleased 10971 180314 35667 77 3 0x100092 kqread dhcpleased 35667 442038 1 0 3 0x80 kqread dhcpleased 61135 1780 0 0 3 0x14200 bored smr 88295 383631 0 0 2 0x14200 zerothread 75770 39265 0 0 3 0x14200 aiodoned aiodoned 79768 297884 0 0 3 0x14200 syncer update 77226 463536 0 0 3 0x14200 cleaner cleaner 29189 432586 0 0 3 0x14200 reaper reaper 84884 57882 0 0 3 0x14200 pgdaemon pagedaemon 78800 462293 0 0 3 0x14200 bored viomb 23872 230005 0 0 3 0x40014200 acpi0 acpi0 43307 338321 0 0 3 0x14200 bored softnet 94673 47017 0 0 3 0x14200 bored systqmp 68471 480587 0 0 3 0x14200 bored systq 30224 226966 0 0 2 0x40014200 softclock 9999 104138 0 0 3 0x40014200 idle0 1 251718 0 0 3 0x80082 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 10201 6473K 14614K 78643K 28098 0 pcb 13 16K 18K 78643K 1008 0 rtable 234 13K 16K 78643K 2506 0 ifaddr 114 27K 29K 78643K 1488 0 sysctl 3 1K 3K 78643K 9 0 counters 28 17K 17K 78643K 174 0 ioctlops 0 0K 4K 78643K 2279 0 iov 0 0K 28K 78643K 699 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1667 104K 104K 78643K 6218 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 52 0 VM map 2 0K 0K 78643K 2 0 sem 12 1K 1K 78643K 79 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 69K 78643K 7453 0 sigio 0 0K 0K 78643K 586 0 proc 64 67K 75K 78643K 2191 0 subproc 104 6K 7K 78643K 364 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 392 0 in_multi 85 5K 7K 78643K 512 0 ether_multi 1 0K 0K 78643K 82 0 mrt 1 0K 0K 78643K 56 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 235 1049K 1049K 78643K 235 0 exec 0 0K 2K 78643K 2725 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 377 628K 4948K 78643K 41356 0 UVM aobj 131 4K 4K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 455 0 NDP 13 0K 1K 78643K 218 0 temp 171 4790K 4870K 78643K 41419 0 kqueue 12 18K 24K 78643K 511 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 120 627 0 624 11 8 3 5 0 8 2 rtentry 112 546 0 454 4 0 4 4 0 8 0 unpcb 136 10338 0 10325 65 61 4 9 0 8 3 syncache 296 23 0 23 7 7 0 1 0 8 0 tcpqe 32 81 0 81 4 4 0 1 0 8 0 tcpcb 736 2586 0 2580 79 78 1 14 0 8 0 arp 88 100 0 86 1 0 1 1 0 8 0 ipq 40 18 0 17 5 4 1 1 0 8 0 ipqe 40 359 0 358 5 4 1 1 0 8 0 inpcb 312 13519 0 13512 113 106 7 19 0 8 6 ip6q 72 8 0 8 4 4 0 1 0 8 0 ip6af 40 14 0 14 4 4 0 1 0 8 0 nd6 48 103 0 77 1 0 1 1 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 ppxss 1152 102 0 102 8 8 0 1 0 8 0 pfstscr 40 107 0 104 2 1 1 1 0 8 0 pfosfp 40 12 0 9 1 0 1 1 0 8 0 pfosfpen 112 12 0 0 1 0 1 1 0 8 0 pfrke_plain 168 154 0 152 1 0 1 1 0 8 0 pfrktable 1344 434 0 421 4 2 2 2 0 8 0 pftag 88 15 0 0 1 0 1 1 0 8 0 pfstitem 24 19 0 10 1 0 1 1 0 8 0 pfstkey 112 365 0 361 2 1 1 1 0 8 0 pfstate 336 184 0 179 2 1 1 1 0 8 0 pfrule 1360 608 0 532 9 2 7 7 0 8 0 rttmrq 48 41 0 37 1 0 1 1 0 8 0 rttmr 72 18 0 18 6 6 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1933 0 1478 44 13 31 32 0 8 0 art_table 32 1934 0 1478 5 0 5 5 0 8 0 art_node 16 541 0 462 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 0 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 77 0 67 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 11154 0 9695 92 0 92 92 0 8 0 ffsino 240 11154 0 9695 87 0 87 87 0 8 0 nchpl 144 21698 0 20071 63 0 63 63 0 8 0 rtmask 32 306 0 305 1 0 1 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 78905 0 78905 5 4 1 2 0 8 1 vcpupl 1984 68 0 0 9 0 9 9 0 8 0 vmpool 528 72 0 4 5 0 5 5 0 8 0 pfiaddrpl 120 125 0 112 1 0 1 1 0 8 0 kstatmem 264 318 0 292 2 0 2 2 0 8 0 scsiplug 72 6 0 6 2 2 0 1 0 8 0 scxspl 216 62576 0 62576 18 17 1 8 0 8 1 plimitpl 152 687 0 673 1 0 1 1 0 8 0 sigapl 424 7713 0 7664 8 2 6 8 0 8 0 futexpl 64 79007 0 79004 1 0 1 1 0 8 0 knotepl 120 118329 0 118249 27 22 5 11 0 8 0 kqueuepl 184 1814 0 1806 27 26 1 4 0 8 0 pipepl 304 2878 0 2850 67 59 8 12 0 8 5 fdescpl 432 7678 0 7652 4 0 4 4 0 8 0 filepl 120 63374 0 63139 85 71 14 18 0 8 6 lockfpl 104 2077 0 2075 6 4 2 2 0 8 1 lockfspl 48 617 0 615 1 0 1 1 0 8 0 sessionpl 144 45 0 29 1 0 1 1 0 8 0 pgrppl 48 55 0 39 1 0 1 1 0 8 0 ucredpl 96 6355 0 6345 1 0 1 1 0 8 0 zombiepl 144 7666 0 7664 1 0 1 1 0 8 0 processpl 1000 7713 0 7664 9 2 7 9 0 8 0 procpl 672 19080 0 19019 18 11 7 8 0 8 1 sosppl 168 46 0 46 4 4 0 1 0 8 0 sockpl 448 24633 0 24610 415 404 11 33 0 8 8 mcl64k 65536 265 0 265 10 9 1 1 0 8 1 mcl16k 16384 83 0 83 14 14 0 1 0 8 0 mcl12k 12288 243 0 243 11 10 1 1 0 8 1 mcl9k 9216 147 0 147 18 18 0 1 0 8 0 mcl8k 8192 464 0 464 10 9 1 1 0 8 1 mcl4k 4096 893 0 892 6 5 1 1 0 8 0 mcl2k2 2112 55 0 55 14 13 1 1 0 8 1 mcl2k 2048 92977 0 92900 28 17 11 13 0 8 0 mtagpl 96 1890 0 1327 19 4 15 15 0 8 0 mbufpl 256 201620 0 200855 147 89 58 63 0 8 7 bufpl 288 15580 0 9176 458 0 458 458 0 8 0 anonpl 24 1461242 0 1442258 223 98 125 143 0 188 0 amapchunkpl 152 1093559 0 1092873 4452 4371 81 4419 0 158 52 amappl16 200 21619 0 20905 114 74 40 51 0 8 0 amappl15 192 1582 0 1578 1 0 1 1 0 8 0 amappl14 184 802 0 797 1 0 1 1 0 8 0 amappl13 176 427 0 425 1 0 1 1 0 8 0 amappl12 168 1056 0 1053 1 0 1 1 0 8 0 amappl11 160 175 0 156 1 0 1 1 0 8 0 amappl10 152 1693 0 1687 1 0 1 1 0 8 0 amappl9 144 1463 0 1457 1 0 1 1 0 8 0 amappl8 136 2418 0 2325 4 0 4 4 0 8 0 amappl7 128 1608 0 1597 1 0 1 1 0 8 0 amappl6 120 1287 0 1266 2 1 1 2 0 8 0 amappl5 112 8227 0 8213 1 0 1 1 0 8 0 amappl4 104 2166 0 2132 2 0 2 2 0 8 0 amappl3 96 22232 0 22188 2 0 2 2 0 8 0 amappl2 88 8685 0 8622 3 1 2 3 0 8 0 amappl1 80 179920 0 179327 25 11 14 19 0 8 0 amappl 88 40267 0 40071 5 0 5 5 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 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 7750 0 7656 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7750 0 7656 1 0 1 1 0 8 0 vmmpekpl 168 59840 0 59780 4 0 4 4 0 8 0 vmmpepl 168 743401 0 740707 228 96 132 160 0 357 1 vmsppl 272 7749 0 7656 8 1 7 7 0 8 0 rwobjpl 24 182401 0 174616 52 4 48 49 0 8 0 pdppl 4096 15506 0 15380 480 348 132 132 0 8 6 pvpl 32 2850437 0 2827747 390 187 203 256 0 265 11 pmappl 216 7749 0 7656 6 0 6 6 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2014 0 1102 27 0 27 27 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff80002e8052c0) at vm_run+0x302 sys/arch/amd64/amd64/vmm.c:4463 vmmioctl(a00,c0205602,ffff80002e8052c0,1,ffff8000ffff87e8) at vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:656 VOP_IOCTL(fffffd806e8153c8,c0205602,ffff80002e8052c0,1,fffffd807f7d73c0,ffff8000ffff87e8) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8068dbcc40,c0205602,ffff80002e8052c0,ffff8000ffff87e8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff87e8,ffff80002e8053d8,ffff80002e805430) at sys_ioctl+0x49e syscall(ffff80002e8054a0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa5fb85204e0, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff80002e8052c0) at vm_run+0x302 sys/arch/amd64/amd64/vmm.c:4463 vmmioctl(a00,c0205602,ffff80002e8052c0,1,ffff8000ffff87e8) at vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:656 VOP_IOCTL(fffffd806e8153c8,c0205602,ffff80002e8052c0,1,fffffd807f7d73c0,ffff8000ffff87e8) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8068dbcc40,c0205602,ffff80002e8052c0,ffff8000ffff87e8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff87e8,ffff80002e8053d8,ffff80002e805430) at sys_ioctl+0x49e syscall(ffff80002e8054a0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa5fb85204e0, count: -8