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(ffff80002df6daf0) at vm_run+0x163 vmmioctl(a00,c0205602,ffff80002df6daf0,1,ffff80002a681558) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806ef0c1b0,c0205602,ffff80002df6daf0,1,fffffd807f7d7750,ffff80002a681558) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c70ada0,c0205602,ffff80002df6daf0,ffff80002a681558) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a681558,ffff80002df6dc00,ffff80002df6dc50) at sys_ioctl+0x49e syscall(ffff80002df6dcc0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc86d3bd5380, count: -8 ddb> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff800034402e30 rbp 0xffff80002df6d840 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffc r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0xb55bbbd903e905b4 r11 0xa0c1e0d04c521d53 r12 0xffff800034402ba8 r13 0xffff80002df6d776 r14 0xffff800034402800 r15 0x246 rip 0xffffffff8121cd3b done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80002df6d6a6 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb> show proc PROC (syz-executor.2) tid=53930 pid=85740 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=77, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a681aa8,0xffffffff82c6c410 process=0xffff80002a72db98 user=0xffff80002df68000, vmspace=0xfffffd80770ae460 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 85740 25021 33500 0 2 0 syz-executor.2 *85740 53930 33500 0 7 0x4000000 syz-executor.2 73047 149758 13603 60928 2 0x10 syz-executor.6 73047 143985 13603 60928 3 0x4000090 fsleep syz-executor.6 3227 65847 86295 0 2 0 syz-executor.1 3227 329034 86295 0 3 0x4000080 fsleep syz-executor.1 50100 211759 30349 0 2 0 syz-executor.5 50100 221415 30349 0 3 0x4000080 lockf syz-executor.5 30349 179817 30402 0 3 0x82 nanoslp syz-executor.5 97020 227395 30402 0 2 0x2 syz-executor.4 52098 252725 30402 0 2 0x2 syz-executor.7 77808 312147 30402 0 2 0x2 syz-executor.0 49011 177152 0 0 3 0x14200 acct acct 36249 299062 0 0 3 0x14200 bored sosplice 13603 324896 30402 0 3 0x82 nanoslp syz-executor.6 86295 511915 30402 0 3 0x82 nanoslp syz-executor.1 33500 110999 30402 0 3 0x82 nanoslp syz-executor.2 30402 417876 93240 0 3 0x2000082 wait syz-fuzzer 30402 460483 93240 0 3 0x6000082 nanoslp syz-fuzzer 30402 416046 93240 0 3 0x6000082 wait syz-fuzzer 30402 118646 93240 0 3 0x6000082 thrsleep syz-fuzzer 30402 495921 93240 0 3 0x6000082 thrsleep syz-fuzzer 30402 95886 93240 0 3 0x6000082 wait syz-fuzzer 30402 454241 93240 0 3 0x6000082 kqread syz-fuzzer 30402 36315 93240 0 3 0x6000082 wait syz-fuzzer 30402 229125 93240 0 3 0x6000082 thrsleep syz-fuzzer 30402 107043 93240 0 3 0x6000082 wait syz-fuzzer 30402 253023 93240 0 3 0x6000082 thrsleep syz-fuzzer 30402 514275 93240 0 3 0x6000082 wait syz-fuzzer 30402 85536 93240 0 3 0x6000082 wait syz-fuzzer 30402 275171 93240 0 3 0x6000082 wait syz-fuzzer 93240 102282 4858 0 3 0x10008a sigsusp ksh 4858 101371 17438 0 3 0x9a kqread sshd 63883 137305 1 0 3 0x100083 ttyin getty 17438 183891 1 0 3 0x88 kqread sshd 74904 462081 14537 73 3 0x1100090 kqread syslogd 14537 365990 1 0 3 0x100082 netio syslogd 57244 452887 1 0 3 0x100080 kqread resolvd 84727 384989 52610 77 3 0x100092 kqread dhcpleased 30431 467961 52610 77 3 0x100092 kqread dhcpleased 52610 340744 1 0 3 0x80 kqread dhcpleased 85498 487587 0 0 3 0x14200 bored smr 86834 390209 0 0 2 0x14200 zerothread 24712 99298 0 0 3 0x14200 aiodoned aiodoned 29813 391633 0 0 3 0x14200 syncer update 38158 58817 0 0 3 0x14200 cleaner cleaner 14849 358267 0 0 3 0x14200 reaper reaper 23941 438773 0 0 3 0x14200 pgdaemon pagedaemon 92504 294337 0 0 3 0x14200 bored viomb 42102 160076 0 0 3 0x40014200 acpi0 acpi0 27294 100128 0 0 3 0x14200 bored softnet3 95884 461423 0 0 3 0x14200 bored softnet2 50808 44590 0 0 3 0x14200 bored softnet1 88182 255658 0 0 3 0x14200 bored softnet0 97703 160054 0 0 3 0x14200 bored systqmp 43193 282167 0 0 3 0x14200 bored systq 59862 318101 0 0 3 0x40014200 tmoslp softclock 84045 233423 0 0 3 0x40014200 idle0 1 35212 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 10205 6545K 7598K 166960K 20681 0 pcb 13 11K 13K 166960K 94 0 rtable 202 14K 15K 166960K 578 0 pf 31 9K 9K 166960K 77 0 ifaddr 38 10K 11K 166960K 84 0 ifgroup 54 2K 2K 166960K 122 0 sysctl 2 0K 0K 166960K 2 0 counters 29 17K 17K 166960K 49 0 ioctlops 0 0K 2K 166960K 246 0 iov 0 0K 16K 166960K 491 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1416 89K 89K 166960K 5156 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 36 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 194 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 14 49K 77K 166960K 2686 0 sigio 0 0K 0K 166960K 34 0 proc 58 59K 75K 166960K 625 0 subproc 104 6K 6K 166960K 156 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 217 0 in_multi 87 6K 7K 166960K 195 0 ether_multi 1 0K 0K 166960K 10 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 812 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 344 186K 188K 166960K 26497 0 UVM aobj 131 4K 4K 166960K 131 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 12 0K 1K 166960K 58 0 temp 74 5920K 6000K 166960K 19064 0 kqueue 12 18K 28K 166960K 216 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 120 160 0 157 3 2 1 3 0 8 0 rtentry 112 185 0 94 4 0 4 4 0 8 0 unpcb 144 995 0 982 8 7 1 6 0 8 0 syncache 312 36 0 36 4 4 0 1 0 8 0 tcpqe 32 125 0 125 4 4 0 1 0 8 0 tcpcb 808 633 0 619 18 16 2 9 0 8 0 arp 88 31 0 21 1 0 1 1 0 8 0 inpcb 336 1875 0 1858 27 24 3 13 0 8 0 nd6 104 42 0 19 1 0 1 1 0 8 0 pkpcb 40 12 0 12 2 2 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1160 9 0 9 2 2 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 744 0 292 31 2 29 29 0 8 0 art_table 32 745 0 292 4 0 4 4 0 8 0 art_node 16 181 0 98 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 189 0 179 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5062 0 3607 92 0 92 92 0 8 0 ffsino 240 5062 0 3607 86 0 86 86 0 8 0 nchpl 144 8667 0 7040 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 31199 0 31197 5 4 1 3 0 8 0 vcpupl 2048 77 0 0 10 0 10 10 0 8 0 vmpool 664 88 0 11 8 1 7 7 0 8 0 kstatmem 264 64 0 40 2 0 2 2 0 8 0 scxspl 216 30715 0 30715 16 15 1 8 1 8 1 plimitpl 152 148 0 133 1 0 1 1 0 8 0 sigapl 424 2976 0 2932 6 0 6 6 0 8 0 futexpl 64 24274 0 24272 2 1 1 1 0 8 0 knotepl 120 26406 0 26326 11 8 3 11 0 8 0 kqueuepl 184 340 0 332 4 0 4 4 0 8 3 pipepl 288 662 0 635 11 8 3 9 0 8 0 fdescpl 432 2958 0 2933 4 0 4 4 0 8 0 filepl 120 18228 0 17987 42 27 15 15 0 8 7 lockfpl 104 733 0 729 2 1 1 2 0 8 0 lockfspl 48 274 0 271 1 0 1 1 0 8 0 sessionpl 144 27 0 11 1 0 1 1 0 8 0 pgrppl 48 45 0 29 1 0 1 1 0 8 0 ucredpl 104 2797 0 2786 1 0 1 1 0 8 0 zombiepl 144 2934 0 2932 1 0 1 1 0 8 0 processpl 1008 2976 0 2932 8 1 7 7 0 8 0 procpl 680 6674 0 6613 12 5 7 7 0 8 0 sosppl 168 41 0 41 4 4 0 1 0 8 0 sockpl 456 3043 0 3010 64 58 6 27 0 8 0 mcl64k 65536 90 0 90 4 3 1 1 0 8 1 mcl16k 16384 69 0 69 5 4 1 1 0 8 1 mcl12k 12288 85 0 85 6 5 1 1 0 8 1 mcl9k 9216 29 0 29 7 6 1 1 0 8 1 mcl8k 8192 239 0 239 6 5 1 1 0 8 1 mcl4k 4096 326 0 326 4 3 1 2 0 8 1 mcl2k2 2112 20 0 20 7 6 1 1 0 8 1 mcl2k 2048 71740 0 71690 40 26 14 31 0 8 4 mtagpl 96 482 0 200 10 1 9 9 0 8 0 mbufpl 256 131873 0 131480 49 17 32 32 0 8 1 bufpl 288 11818 0 5418 458 0 458 458 0 8 0 anonpl 24 450306 0 436613 131 42 89 108 0 188 0 amapchunkpl 152 97993 0 97203 60 22 38 46 0 158 3 amappl16 200 11991 0 11594 61 39 22 35 0 8 0 amappl15 192 44 0 44 1 1 0 1 0 8 0 amappl14 184 159 0 148 2 1 1 2 0 8 0 amappl13 176 27 0 24 1 0 1 1 0 8 0 amappl12 168 3636 0 3609 2 0 2 2 0 8 0 amappl11 160 66 0 56 1 0 1 1 0 8 0 amappl10 152 32 0 24 2 1 1 1 0 8 0 amappl9 144 133 0 132 1 0 1 1 0 8 0 amappl8 136 244 0 170 3 0 3 3 0 8 0 amappl7 128 175 0 157 2 0 2 2 0 8 0 amappl6 120 327 0 318 1 0 1 1 0 8 0 amappl5 112 173 0 164 1 0 1 1 0 8 0 amappl4 104 487 0 463 2 1 1 2 0 8 0 amappl3 96 16993 0 16917 3 0 3 3 0 8 0 amappl2 88 3478 0 3405 3 1 2 3 0 8 0 amappl1 80 18788 0 18282 22 11 11 22 0 8 0 amappl 88 25896 0 25684 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 3046 0 2944 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3046 0 2944 1 0 1 1 0 8 0 vmmpekpl 168 25202 0 25133 4 0 4 4 0 8 0 vmmpepl 168 194544 0 192364 158 52 106 124 0 357 2 vmsppl 368 3045 0 2944 10 0 10 10 0 8 0 rwobjpl 24 58729 0 51269 47 1 46 46 0 8 0 pdppl 4096 6098 0 5965 263 123 140 140 0 8 7 pvpl 32 1034159 0 1015320 361 197 164 333 0 265 0 pmappl 216 3045 0 2944 6 0 6 6 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1142 0 246 26 0 26 26 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff80002df6daf0) at vm_run+0x163 vmmioctl(a00,c0205602,ffff80002df6daf0,1,ffff80002a681558) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806ef0c1b0,c0205602,ffff80002df6daf0,1,fffffd807f7d7750,ffff80002a681558) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c70ada0,c0205602,ffff80002df6daf0,ffff80002a681558) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a681558,ffff80002df6dc00,ffff80002df6dc50) at sys_ioctl+0x49e syscall(ffff80002df6dcc0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc86d3bd5380, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff80002df6daf0) at vm_run+0x163 vmmioctl(a00,c0205602,ffff80002df6daf0,1,ffff80002a681558) at vmmioctl+0x299 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806ef0c1b0,c0205602,ffff80002df6daf0,1,fffffd807f7d7750,ffff80002a681558) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c70ada0,c0205602,ffff80002df6daf0,ffff80002a681558) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a681558,ffff80002df6dc00,ffff80002df6dc50) at sys_ioctl+0x49e syscall(ffff80002df6dcc0) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc86d3bd5380, count: -8 ddb>