kernel: protection fault trap, code=0 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace done_flush() at done_flush+0x38 vm_run(ffff800027e2f330) at vm_run+0x304 sys/arch/amd64/amd64/vmm.c:4297 vmmioctl(a00,c0205602,ffff800027e2f330,1,ffff800027b2ca90) at vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 VOP_IOCTL(fffffd806e209910,c0205602,ffff800027e2f330,1,fffffd807f7d8720,ffff800027b2ca90) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806835c0b8,c0205602,ffff800027e2f330,ffff800027b2ca90) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800027b2ca90,ffff800027e2f448,ffff800027e2f4a0) at sys_ioctl+0x4a2 syscall(ffff800027e2f510) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027e2f510) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x342ae933b80, count: -8 ddb{0}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff80002c94b638 rbp 0xffff800027e2f0a0 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffc r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0x99ad9bd369f29c63 r11 0x21f37e40075e4dac r12 0xffffffff8292fcb0 dt_prov_static r13 0x246 r14 0xffff80002c94b000 r15 0xffff800027e2f330 rip 0xffffffff8101afb0 done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff800027e2eef6 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{0}> show proc PROC (syz-executor.0) pid=283311 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff800027b2c010,0xffff8000ffff3278 process=0xffff80002609fa48 user=0xffff800027e2a000, vmspace=0xfffffd807c306e80 estcpu=32, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 397 278575 69677 0 2 0 syz-executor.6 21288 523118 52884 0 2 0 syz-executor.1 21288 324051 52884 0 3 0x4000080 bell syz-executor.1 21288 501670 52884 0 2 0x4000000 syz-executor.1 66396 320127 2322 0 2 0 syz-executor.3 66396 113620 2322 0 3 0x4000080 fsleep syz-executor.3 56975 96422 5742 0 2 0 syz-executor.0 *56975 283311 5742 0 7 0x4000000 syz-executor.0 56975 454547 5742 0 3 0x4000080 fsleep syz-executor.0 28732 170211 21732 0 3 0x80 nanoslp syz-executor.2 28732 464527 21732 0 3 0x4000080 netio syz-executor.2 28732 377873 21732 0 3 0x4000080 fsleep syz-executor.2 2322 2298 27777 0 3 0x82 nanoslp syz-executor.3 45271 208640 27777 0 3 0x82 nanoslp syz-executor.4 21732 259254 27777 0 3 0x82 nanoslp syz-executor.2 52884 393867 27777 0 3 0x82 nanoslp syz-executor.1 5742 198935 27777 0 3 0x82 nanoslp syz-executor.0 3181 441628 27777 0 2 0x2 syz-executor.7 4207 95235 27777 0 3 0x82 piperd syz-executor.5 69677 429935 27777 0 3 0x82 nanoslp syz-executor.6 37201 89941 0 0 3 0x14200 acct acct 29867 216020 0 0 3 0x14280 nfsidl nfsio 84314 82873 0 0 3 0x14280 nfsidl nfsio 55645 212738 0 0 3 0x14280 nfsidl nfsio 37817 303076 0 0 3 0x14280 nfsidl nfsio 78600 150103 0 0 3 0x14280 nfsidl nfsio 21562 271559 0 0 3 0x14280 nfsidl nfsio 37947 47004 0 0 3 0x14280 nfsidl nfsio 15227 152423 0 0 3 0x14280 nfsidl nfsio 83451 137951 0 0 3 0x14280 nfsidl nfsio 22426 373649 0 0 3 0x14280 nfsidl nfsio 78395 275153 0 0 3 0x14280 nfsidl nfsio 28543 355577 0 0 3 0x14280 nfsidl nfsio 69494 195660 0 0 3 0x14280 nfsidl nfsio 48880 491554 0 0 3 0x14280 nfsidl nfsio 16106 222237 0 0 3 0x14280 nfsidl nfsio 69657 168975 0 0 3 0x14280 nfsidl nfsio 80530 202755 0 0 3 0x14280 nfsidl nfsio 94299 520181 0 0 3 0x14280 nfsidl nfsio 87304 120290 0 0 3 0x14280 nfsidl nfsio 52307 119701 0 0 3 0x14280 nfsidl nfsio 32333 301836 0 0 3 0x14200 bored sosplice 27777 95257 37714 0 3 0x82 thrsleep syz-fuzzer 27777 243979 37714 0 3 0x4000082 nanoslp syz-fuzzer 27777 464102 37714 0 3 0x4000082 kqread syz-fuzzer 27777 398639 37714 0 3 0x4000082 thrsleep syz-fuzzer 27777 159077 37714 0 3 0x4000082 thrsleep syz-fuzzer 27777 3952 37714 0 3 0x4000082 nanoslp syz-fuzzer 27777 360974 37714 0 3 0x4000082 thrsleep syz-fuzzer 27777 11241 37714 0 3 0x4000082 thrsleep syz-fuzzer 27777 73969 37714 0 3 0x4000082 thrsleep syz-fuzzer 37714 180087 37467 0 3 0x10008a sigsusp ksh 37467 226721 99397 0 3 0x9a kqread sshd 55667 117280 1 0 3 0x100083 ttyin getty 99397 464805 1 0 3 0x88 kqread sshd 99506 91664 74480 74 3 0x1100092 bpf pflogd 74480 183925 1 0 3 0x80 netio pflogd 63267 48561 75192 73 3 0x1100090 kqread syslogd 75192 81683 1 0 3 0x100082 netio syslogd 64748 37951 1 0 3 0x100080 kqread resolvd 73229 143851 33400 77 3 0x100092 kqread dhcpleased 74868 450800 33400 77 3 0x100092 kqread dhcpleased 33400 233176 1 0 3 0x80 kqread dhcpleased 24679 520012 0 0 3 0x14200 bored smr 66585 511137 0 0 2 0x14200 zerothread 94642 523124 0 0 3 0x14200 aiodoned aiodoned 8649 453075 0 0 3 0x14200 syncer update 463 31509 0 0 3 0x14200 cleaner cleaner 30738 242676 0 0 3 0x14200 reaper reaper 39927 514442 0 0 3 0x14200 pgdaemon pagedaemon 85997 289177 0 0 3 0x14200 bored viomb 30065 384971 0 0 3 0x40014200 acpi0 acpi0 17184 138171 0 0 7 0x40014200 idle1 97137 132875 0 0 3 0x14200 bored softnet 22913 63165 0 0 3 0x14200 bored systqmp 9571 233862 0 0 3 0x14200 bored systq 94954 210000 0 0 3 0x40014200 bored softclock 76434 513062 0 0 3 0x40014200 idle0 1 275876 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 56975 (syz-executor.0) thread 0xffff800027b2ca90 (283311) exclusive rwlock vcpu r = 0 (0xffff80002c94b3b0) #0 witness_lock+0x44d #1 vm_run+0x2e0 sys/arch/amd64/amd64/vmm.c:4264 #2 vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 #3 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #5 sys_ioctl+0x4a2 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 3181 (syz-executor.7) thread 0xffff800027b2da50 (441628) exclusive rrwlock inode r = 0 (0xfffffd8065534700) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8065ec9d60) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10223 6524K 8101K 78643K 21426 0 pcb 14 20K 25K 78643K 4928 0 rtable 226 17K 18K 78643K 8933 0 ifaddr 98 27K 31K 78643K 2049 0 sysctl 3 1K 2K 78643K 14 0 counters 56 35K 36K 78643K 636 0 ioctlops 0 0K 4K 78643K 11459 0 iov 0 0K 24K 78643K 2391 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1503 94K 94K 78643K 8315 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 205 0 VM map 2 1K 1K 78643K 2 0 sem 11 1K 1K 78643K 36 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 89K 78643K 33434 0 sigio 0 0K 0K 78643K 1497 0 proc 71 87K 123K 78643K 4017 0 subproc 104 6K 7K 78643K 1313 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1222 0 in_multi 91 6K 7K 78643K 3107 0 ether_multi 1 0K 0K 78643K 198 0 mrt 2 0K 0K 78643K 488 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 5208 0 pfkey data 0 0K 4K 78643K 25997 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 756 2017K 2019K 78643K 402829 0 UVM aobj 131 9K 9K 78643K 135 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 841 0 NDP 14 0K 2K 78643K 893 0 temp 148 4721K 4801K 78643K 325222 0 kqueue 12 18K 26K 78643K 3745 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 1632 0 1629 23 22 1 3 0 8 0 rtentry 112 3263 0 3170 6 2 4 4 0 8 1 unpcb 136 18233 0 18216 186 180 6 9 0 8 5 syncache 296 30 0 30 9 9 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 18804 0 18800 347 342 5 26 0 8 4 arp 120 234 0 218 1 0 1 1 0 8 0 inpcb 304 41523 0 41514 339 332 7 19 0 8 6 rttmr 72 206 0 206 10 9 1 1 0 8 1 ip6q 72 6 0 6 2 2 0 1 0 8 0 ip6af 40 42 0 42 2 2 0 1 0 8 0 nd6 48 748 0 727 1 0 1 1 0 8 0 pkpcb 40 21840 0 21840 25 24 1 3 0 8 1 kcovpl 48 101 0 93 1 0 1 1 0 8 0 ppxss 1248 97 0 97 28 28 0 1 0 8 0 pfstscr 40 6 0 6 2 2 0 1 0 8 0 pffrag 232 86 0 86 7 6 1 1 0 482 1 pffrnode 88 86 0 86 7 6 1 1 0 8 1 pffrent 40 504 0 504 10 9 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 106 0 102 2 1 1 1 0 8 0 pftag 88 11 0 10 2 1 1 1 0 8 0 pfqueue 264 4 0 4 1 1 0 1 0 8 0 pfstitem 24 113 0 111 1 0 1 1 0 8 0 pfstkey 112 123 0 121 1 0 1 1 0 8 0 pfstate 320 117 0 115 3 2 1 3 0 8 0 pfsrctr 152 4 0 4 1 1 0 1 0 8 0 pfrule 1360 123 0 95 6 3 3 3 0 8 0 art_heap8 4096 154 0 153 9 8 1 4 0 8 0 art_heap4 256 7823 0 7413 84 55 29 37 0 8 1 art_table 32 7977 0 7566 10 6 4 5 0 8 0 art_node 16 2932 0 2852 1 0 1 1 0 8 0 sysvmsgpl 40 41 0 3 1 0 1 1 0 8 0 semapl 112 21 0 12 1 0 1 1 0 8 0 shmpl 112 132 0 4 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 44262 0 42726 97 0 97 97 0 8 0 ffsino 272 44262 0 42726 103 0 103 103 0 8 0 nchpl 144 90512 0 88884 63 0 63 63 0 8 0 uvmvnodes 80 8350 0 0 171 0 171 171 0 8 0 vnodes 224 8350 0 0 492 0 492 492 0 8 0 namei 1024 293796 0 293796 8 7 1 2 0 8 1 percpumem 16 330 0 290 1 0 1 1 0 8 0 vcpupl 2048 426 0 0 54 0 54 54 0 8 0 vmpool 560 483 0 57 31 0 31 31 0 8 0 pfiaddrpl 120 36 0 27 3 2 1 1 0 8 0 scsiplug 72 9 0 9 3 3 0 1 0 8 0 scxspl 216 246436 0 246436 26 25 1 8 0 8 1 plimitpl 152 3446 0 3431 1 0 1 1 0 8 0 sigapl 424 33563 0 33498 8 0 8 8 0 8 0 futexpl 64 326141 0 326138 5 4 1 1 0 8 0 knotepl 120 339 0 0 5 0 5 5 0 8 0 kqueuepl 216 7717 0 7709 106 105 1 5 0 8 0 pipepl 336 6122 0 6093 138 135 3 14 0 8 0 fdescpl 496 33526 0 33498 5 0 5 5 0 8 0 filepl 152 232128 0 231879 305 288 17 23 0 8 7 lockfpl 104 6694 0 6691 12 11 1 2 0 8 0 lockfspl 48 1614 0 1611 1 0 1 1 0 8 0 sessionpl 144 114 0 97 1 0 1 1 0 8 0 pgrppl 48 208 0 191 1 0 1 1 0 8 0 ucredpl 96 23817 0 23799 1 0 1 1 0 8 0 zombiepl 144 33499 0 33498 4 3 1 1 0 8 0 processpl 1064 33563 0 33498 5 0 5 5 0 8 0 procpl 672 88681 0 88601 28 20 8 10 0 8 0 srpgc 96 108 0 108 24 23 1 1 0 8 1 sosppl 168 129 0 129 29 28 1 1 0 8 1 sockpl 480 83316 0 83287 1317 1297 20 35 0 8 16 mcl64k 65536 33 0 0 5 2 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 33 0 0 5 2 3 3 0 8 0 mcl4k 4096 33 0 0 5 2 3 3 0 8 0 mcl2k2 2112 20 0 0 2 0 2 2 0 8 0 mcl2k 2048 350 0 0 21 2 19 21 0 8 0 mtagpl 96 554 0 0 10 2 8 10 0 8 0 mbufpl 256 1513 0 0 66 19 47 66 0 8 1 bufpl 288 49333 0 40965 598 0 598 598 0 8 0 anonpl 24 8686109 0 8665015 464 309 155 189 0 186 5 amapchunkpl 152 964961 0 964000 228 187 41 51 0 158 0 amappl16 200 84655 0 83776 240 191 49 72 0 8 0 amappl15 192 3093 0 3086 1 0 1 1 0 8 0 amappl14 184 3353 0 3344 1 0 1 1 0 8 0 amappl13 176 2552 0 2550 1 0 1 1 0 8 0 amappl12 168 5085 0 5077 2 1 1 1 0 8 0 amappl11 160 7886 0 7869 2 1 1 2 0 8 0 amappl10 152 4921 0 4909 1 0 1 1 0 8 0 amappl9 144 5809 0 5801 1 0 1 1 0 8 0 amappl8 136 5160 0 4979 7 0 7 7 0 8 0 amappl7 128 2810 0 2796 1 0 1 1 0 8 0 amappl6 120 5900 0 5868 10 8 2 2 0 8 0 amappl5 112 32352 0 32332 1 0 1 1 0 8 0 amappl4 104 14379 0 14346 6 5 1 2 0 8 0 amappl3 96 7110 0 7098 1 0 1 1 0 8 0 amappl2 88 7138 0 7071 3 1 2 3 0 8 0 amappl1 80 671495 0 670784 30 12 18 19 0 8 0 amappl 88 399928 0 399549 13 3 10 10 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 72 134 0 4 3 0 3 3 0 8 0 uaddrrnd 24 34009 0 33555 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 34009 0 33555 3 0 3 3 0 8 0 vmmpekpl 168 221701 0 221596 5 0 5 5 0 8 0 vmmpepl 168 3124924 0 3121102 585 393 192 201 0 357 9 vmsppl 368 34008 0 33555 43 1 42 42 0 8 0 rwobjpl 56 760189 0 749457 179 26 153 153 0 8 0 pdppl 4096 68025 0 67536 1283 786 497 497 0 8 8 pvpl 32 14764261 0 14743284 744 525 219 268 0 265 5 pmappl 248 34008 0 33555 31 2 29 29 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2882 0 1367 44 0 44 44 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace done_flush() at done_flush+0x38 vm_run(ffff800027e2f330) at vm_run+0x304 sys/arch/amd64/amd64/vmm.c:4297 vmmioctl(a00,c0205602,ffff800027e2f330,1,ffff800027b2ca90) at vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 VOP_IOCTL(fffffd806e209910,c0205602,ffff800027e2f330,1,fffffd807f7d8720,ffff800027b2ca90) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806835c0b8,c0205602,ffff800027e2f330,ffff800027b2ca90) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800027b2ca90,ffff800027e2f448,ffff800027e2f4a0) at sys_ioctl+0x4a2 syscall(ffff800027e2f510) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027e2f510) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x342ae933b80, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5