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(ffff800037903790) at vm_run+0x163 vmmioctl(a00,c0205602,ffff800037903790,1,ffff80002a63caa8) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806eef1438,c0205602,ffff800037903790,1,fffffd807f7d7618,ffff80002a63caa8) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8064dd4168,c0205602,ffff800037903790,ffff80002a63caa8) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a63caa8,ffff8000379038a0,ffff8000379038f0) at sys_ioctl+0x49e syscall(ffff800037903960) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf54bbcc6120, count: -8 ddb> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff8000378d9630 rbp 0xffff8000379034e0 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffc r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0x1bb0da41e0e18c22 r11 0xea4486fbe5c6c3e8 r12 0xffff8000378d93a8 r13 0xffff800037903416 r14 0xffff8000378d9000 r15 0x246 rip 0xffffffff81abd84b done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff800037903346 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb> show proc PROC (syz-executor.3) tid=365051 pid=41304 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a63cff8,0xffff80002a671810 process=0xffff80002f5cd7b0 user=0xffff8000378fe000, vmspace=0xfffffd8069c30e70 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 18908 241672 40873 0 3 0x80 nanoslp syz-executor.6 18908 221380 40873 0 3 0x4000080 lockf syz-executor.6 18908 102482 40873 0 3 0x4000080 fsleep syz-executor.6 18908 141316 40873 0 3 0x4000080 fsleep syz-executor.6 28607 401505 6302 0 2 0 syz-executor.5 28607 158580 6302 0 3 0x4000080 fsleep syz-executor.5 41304 150939 82150 0 2 0 syz-executor.3 *41304 365051 82150 0 7 0x4000000 syz-executor.3 41304 165175 82150 0 3 0x4000080 fsleep syz-executor.3 7044 388585 5779 0 2 0 syz-executor.7 7044 298275 5779 0 3 0x4000080 fsleep syz-executor.7 57452 237327 78677 0 2 0 syz-executor.4 57452 425138 78677 0 3 0x4000080 fsleep syz-executor.4 18486 281761 19979 60928 2 0x10 syz-executor.1 18486 444320 19979 60928 3 0x4000090 fsleep syz-executor.1 6302 276593 96359 0 3 0x82 nanoslp syz-executor.5 78677 487037 96359 0 3 0x82 nanoslp syz-executor.4 87770 406650 96359 0 3 0x2 biowait syz-executor.0 40873 270231 96359 0 3 0x82 nanoslp syz-executor.6 5318 54012 0 0 3 0x14200 bored sosplice 51344 435419 0 0 3 0x14280 nfsidl nfsio 91430 473883 0 0 3 0x14280 nfsidl nfsio 41180 76922 0 0 3 0x14280 nfsidl nfsio 50201 261676 0 0 3 0x14280 nfsidl nfsio 68406 418714 0 0 3 0x14280 nfsidl nfsio 74477 148338 0 0 3 0x14280 nfsidl nfsio 22906 523487 0 0 3 0x14280 nfsidl nfsio 277 408629 0 0 3 0x14280 nfsidl nfsio 88253 494216 0 0 3 0x14280 nfsidl nfsio 58278 58581 0 0 3 0x14280 nfsidl nfsio 93939 98796 0 0 3 0x14280 nfsidl nfsio 73502 510757 0 0 3 0x14280 nfsidl nfsio 76474 203512 0 0 3 0x14280 nfsidl nfsio 73562 292050 0 0 3 0x14280 nfsidl nfsio 91396 178300 0 0 3 0x14280 nfsidl nfsio 74134 423091 0 0 3 0x14280 nfsidl nfsio 45185 190877 0 0 3 0x14280 nfsidl nfsio 46627 164749 0 0 3 0x14280 nfsidl nfsio 9825 337788 0 0 3 0x14280 nfsidl nfsio 88423 33322 0 0 3 0x14280 nfsidl nfsio 5779 121808 96359 0 3 0x82 nanoslp syz-executor.7 82150 398368 96359 0 3 0x82 nanoslp syz-executor.3 23018 210920 96359 0 3 0x82 nanoslp syz-executor.2 19979 513605 96359 0 3 0x82 nanoslp syz-executor.1 96359 350862 72012 0 3 0x2000082 wait syz-fuzzer 96359 436188 72012 0 3 0x6000082 thrsleep syz-fuzzer 96359 469725 72012 0 3 0x6000082 thrsleep syz-fuzzer 96359 318059 72012 0 3 0x6000082 thrsleep syz-fuzzer 96359 41378 72012 0 3 0x6000082 wait syz-fuzzer 96359 312372 72012 0 3 0x6000082 wait syz-fuzzer 96359 161653 72012 0 3 0x6000082 thrsleep syz-fuzzer 96359 70494 72012 0 3 0x6000082 wait syz-fuzzer 96359 206821 72012 0 3 0x6000082 wait syz-fuzzer 96359 67797 72012 0 3 0x6000082 wait syz-fuzzer 96359 402746 72012 0 3 0x6000082 thrsleep syz-fuzzer 96359 376288 72012 0 3 0x6000082 wait syz-fuzzer 96359 138900 72012 0 3 0x6000082 wait syz-fuzzer 96359 122371 72012 0 3 0x6000082 kqread syz-fuzzer 72012 59308 81602 0 3 0x10008a sigsusp ksh 81602 187519 46573 0 3 0x9a kqread sshd 9851 405355 1 0 3 0x100083 ttyin getty 46573 507244 1 0 3 0x88 kqread sshd 87260 377592 22139 73 3 0x1100090 kqread syslogd 22139 488757 1 0 3 0x100082 netio syslogd 49071 18151 1 0 3 0x100080 kqread resolvd 91590 175689 45872 77 3 0x100092 kqread dhcpleased 49486 501310 45872 77 3 0x100092 kqread dhcpleased 45872 260864 1 0 3 0x80 kqread dhcpleased 90714 265674 0 0 3 0x14200 bored smr 62672 177846 0 0 2 0x14200 zerothread 43961 98913 0 0 3 0x14200 aiodoned aiodoned 16922 74302 0 0 3 0x14200 syncer update 35840 211752 0 0 3 0x14200 cleaner cleaner 32419 485396 0 0 3 0x14200 reaper reaper 4595 111392 0 0 3 0x14200 pgdaemon pagedaemon 41705 334359 0 0 3 0x14200 bored viomb 24732 138080 0 0 3 0x40014200 acpi0 acpi0 78051 239723 0 0 3 0x14200 bored softnet3 20932 359587 0 0 3 0x14200 bored softnet2 12747 436877 0 0 3 0x14200 bored softnet1 97390 54150 0 0 3 0x14200 bored softnet0 52703 322525 0 0 3 0x14200 bored systqmp 48061 293302 0 0 3 0x14200 bored systq 80965 330842 0 0 3 0x40014200 tmoslp softclock 76796 56879 0 0 3 0x40014200 idle0 1 326514 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 10217 6604K 7399K 166960K 24166 0 pcb 13 11K 13K 166960K 145 0 rtable 170 13K 14K 166960K 588 0 pf 27 8K 9K 166960K 96 0 ifaddr 36 10K 11K 166960K 95 0 ifgroup 46 2K 2K 166960K 153 0 sysctl 2 0K 0K 166960K 2 0 counters 27 17K 17K 166960K 55 0 ioctlops 0 0K 2K 166960K 270 0 iov 0 0K 16K 166960K 402 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1535 96K 96K 166960K 4893 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 52 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 191 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 77K 166960K 3500 0 sigio 0 0K 0K 166960K 103 0 proc 58 59K 83K 166960K 745 0 subproc 104 6K 6K 166960K 160 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 192 0 in_multi 67 5K 7K 166960K 203 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 163 731K 731K 166960K 163 0 exec 0 0K 1K 166960K 837 0 pfkey data 0 0K 0K 166960K 3 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 367 188K 190K 166960K 34341 0 UVM aobj 131 4K 4K 166960K 154 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 66 0 NDP 10 0K 2K 166960K 65 0 temp 74 5920K 6044K 166960K 36030 0 kqueue 12 18K 26K 166960K 251 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 215 0 212 4 3 1 2 0 8 0 rtentry 112 186 0 111 4 1 3 4 0 8 0 unpcb 144 2419 0 2406 32 31 1 6 0 8 0 syncache 312 55 0 55 11 11 0 1 0 8 0 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 169 0 169 9 9 0 1 0 8 0 tcpcb 808 1427 0 1423 49 48 1 9 0 8 0 arp 88 29 0 19 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 336 2634 0 2627 51 50 1 11 0 8 0 nd6 104 49 0 34 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 2 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1160 9 0 9 3 3 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 791 0 431 33 8 25 29 0 8 0 art_table 32 792 0 431 4 1 3 4 0 8 0 art_node 16 185 0 116 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 0 1 0 1 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 180 0 170 1 0 1 1 0 8 0 shmpl 112 151 0 23 4 0 4 4 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 6078 0 4629 91 0 91 91 0 8 0 ffsino 240 6078 0 4629 86 0 86 86 0 8 0 nchpl 144 10903 0 9252 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 37406 0 37405 7 6 1 3 0 8 0 vcpupl 2048 12 0 0 2 0 2 2 0 8 0 vmpool 664 16 0 4 1 0 1 1 0 8 0 kstatmem 264 76 0 56 2 0 2 2 0 8 0 scxspl 216 36703 0 36702 14 13 1 8 1 8 0 plimitpl 152 553 0 538 1 0 1 1 0 8 0 sigapl 424 3805 0 3740 9 1 8 8 0 8 0 futexpl 64 32751 0 32744 3 2 1 1 0 8 0 knotepl 120 34758 0 34676 30 26 4 17 0 8 0 kqueuepl 184 637 0 629 13 12 1 7 0 8 0 pipepl 288 514 0 485 12 9 3 7 0 8 0 fdescpl 432 3768 0 3741 9 5 4 4 0 8 0 filepl 120 23113 0 22864 65 56 9 16 0 8 1 lockfpl 104 1231 0 1225 5 4 1 2 0 8 0 lockfspl 48 423 0 418 1 0 1 1 0 8 0 sessionpl 144 27 0 11 1 0 1 1 0 8 0 pgrppl 48 37 0 21 1 0 1 1 0 8 0 ucredpl 104 2574 0 2562 1 0 1 1 0 8 0 zombiepl 144 3741 0 3740 2 1 1 1 0 8 0 processpl 1008 3805 0 3740 12 3 9 9 0 8 0 procpl 680 8993 0 8906 13 5 8 9 0 8 0 sosppl 168 60 0 60 3 3 0 1 0 8 0 sockpl 456 5274 0 5251 154 147 7 23 0 8 4 mcl64k 65536 120 0 120 14 14 0 1 0 8 0 mcl16k 16384 79 0 79 11 10 1 1 0 8 1 mcl12k 12288 173 0 173 15 15 0 1 0 8 0 mcl9k 9216 55 0 55 13 13 0 1 0 8 0 mcl8k 8192 224 0 224 15 15 0 1 0 8 0 mcl4k 4096 1524 0 1273 45 12 33 33 0 8 0 mcl2k2 2112 18 0 18 12 12 0 1 0 8 0 mcl2k 2048 73930 0 73875 41 33 8 31 0 8 0 mtagpl 96 193 0 138 4 2 2 2 0 8 0 mbufpl 256 146220 0 145818 94 67 27 63 0 8 0 bufpl 288 10266 0 3869 458 0 458 458 0 8 0 anonpl 24 530709 0 516888 190 97 93 157 0 188 0 amapchunkpl 152 112008 0 111120 77 41 36 64 0 158 0 amappl16 200 11461 0 11020 51 27 24 36 0 8 0 amappl15 192 14 0 14 2 2 0 1 0 8 0 amappl14 184 160 0 146 2 1 1 2 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 4440 0 4411 2 0 2 2 0 8 0 amappl11 160 57 0 47 1 0 1 1 0 8 0 amappl10 152 35 0 26 2 1 1 1 0 8 0 amappl9 144 183 0 182 2 1 1 1 0 8 0 amappl8 136 309 0 226 3 0 3 3 0 8 0 amappl7 128 179 0 158 2 0 2 2 0 8 0 amappl6 120 344 0 331 1 0 1 1 0 8 0 amappl5 112 177 0 168 1 0 1 1 0 8 0 amappl4 104 480 0 460 2 1 1 2 0 8 0 amappl3 96 21877 0 21784 3 0 3 3 0 8 0 amappl2 88 4344 0 4270 3 0 3 3 0 8 0 amappl1 80 21580 0 21064 22 10 12 22 0 8 0 amappl 88 33717 0 33477 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 72 153 0 23 3 0 3 3 0 8 0 uaddrrnd 24 3784 0 3745 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3784 0 3745 1 0 1 1 0 8 0 vmmpekpl 168 29497 0 29442 4 1 3 3 0 8 0 vmmpepl 168 237242 0 234956 180 75 105 120 0 357 0 vmsppl 368 3783 0 3745 4 0 4 4 0 8 0 rwobjpl 24 67539 0 59983 48 1 47 47 0 8 0 pdppl 4096 7574 0 7502 303 230 73 75 0 8 1 pvpl 32 1310841 0 1291624 392 224 168 361 0 265 0 pmappl 216 3783 0 3745 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1347 0 520 25 0 25 25 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff800037903790) at vm_run+0x163 vmmioctl(a00,c0205602,ffff800037903790,1,ffff80002a63caa8) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806eef1438,c0205602,ffff800037903790,1,fffffd807f7d7618,ffff80002a63caa8) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8064dd4168,c0205602,ffff800037903790,ffff80002a63caa8) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a63caa8,ffff8000379038a0,ffff8000379038f0) at sys_ioctl+0x49e syscall(ffff800037903960) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf54bbcc6120, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff800037903790) at vm_run+0x163 vmmioctl(a00,c0205602,ffff800037903790,1,ffff80002a63caa8) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806eef1438,c0205602,ffff800037903790,1,fffffd807f7d7618,ffff80002a63caa8) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8064dd4168,c0205602,ffff800037903790,ffff80002a63caa8) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a63caa8,ffff8000379038a0,ffff8000379038f0) at sys_ioctl+0x49e syscall(ffff800037903960) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf54bbcc6120, count: -8