kernel: protection fault trap, code=0 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace done_flush() at done_flush+0x38 vm_run(ffff80002e47acc0) at vm_run+0x215 sys/arch/amd64/amd64/vmm.c:4562 vmmioctl(a00,c0205602,ffff80002e47acc0,1,ffff80002130d260) at vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:685 VOP_IOCTL(fffffd806ea9ee60,c0205602,ffff80002e47acc0,1,fffffd807f7d7618,ffff80002130d260) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806fea0278,c0205602,ffff80002e47acc0,ffff80002130d260) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:528 sys_ioctl(ffff80002130d260,ffff80002e47add8,ffff80002e47ae20) at sys_ioctl+0x4a2 syscall(ffff80002e47aea0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e47aea0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9094579730, count: -8 ddb{1}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff800024788e40 rbp 0xffff80002e47aa10 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0x100000000 r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0xa423ada50872ab85 r11 0xee84031abb7965c9 r12 0xffff800024788ba0 r13 0 r14 0xffff800024788800 r15 0xffff800020de8ff0 rip 0xffffffff81bb6c70 done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80002e47a856 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{1}> show proc PROC (syz-executor.7) pid=384641 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff80002130c540,0xffffffff82b86610 process=0xffff8000ffff2dc8 user=0xffff80002e475000, vmspace=0xfffffd805efa9cf8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44425 117525 53202 0 2 0 syz-executor.2 71076 471837 38541 0 7 0 syz-executor.7 *71076 384641 38541 0 7 0x4000000 syz-executor.7 70876 277387 5204 0 2 0 syz-executor.1 31198 155590 25445 0 2 0 syz-executor.6 31198 200746 25445 0 3 0x4000080 fsleep syz-executor.6 11137 383477 78164 0 2 0 syz-executor.4 11137 418498 78164 0 3 0x4000080 fsleep syz-executor.4 71432 502247 90091 0 2 0 syz-executor.0 71432 503347 90091 0 2 0x4000000 syz-executor.0 80569 52959 98367 0 2 0 syz-executor.3 38541 318008 57158 0 3 0x82 nanoslp syz-executor.7 25445 65332 57158 0 3 0x82 nanoslp syz-executor.6 53202 115868 57158 0 3 0x82 nanoslp syz-executor.2 16570 441886 0 0 3 0x14280 nfsidl nfsio 67818 196025 0 0 3 0x14280 nfsidl nfsio 25348 350612 0 0 3 0x14280 nfsidl nfsio 79710 15206 0 0 3 0x14280 nfsidl nfsio 11962 500495 0 0 3 0x14280 nfsidl nfsio 66499 361154 0 0 3 0x14280 nfsidl nfsio 19391 311989 0 0 3 0x14280 nfsidl nfsio 16013 405947 0 0 3 0x14280 nfsidl nfsio 96264 364924 0 0 3 0x14280 nfsidl nfsio 60650 48609 0 0 3 0x14280 nfsidl nfsio 4258 203055 0 0 3 0x14280 nfsidl nfsio 45686 119093 0 0 3 0x14280 nfsidl nfsio 28605 115508 0 0 3 0x14280 nfsidl nfsio 20938 401781 0 0 3 0x14280 nfsidl nfsio 48727 521012 0 0 3 0x14280 nfsidl nfsio 74577 274119 0 0 3 0x14280 nfsidl nfsio 60014 278765 0 0 3 0x14280 nfsidl nfsio 19324 35239 0 0 3 0x14280 nfsidl nfsio 16752 136779 0 0 3 0x14280 nfsidl nfsio 76059 59687 0 0 3 0x14280 nfsidl nfsio 53845 471808 0 0 3 0x14200 acct acct 78164 488392 57158 0 3 0x82 nanoslp syz-executor.4 98367 185489 57158 0 3 0x82 nanoslp syz-executor.3 90091 236924 57158 0 3 0x82 nanoslp syz-executor.0 96372 477853 1 0 3 0x100083 ttyin getty 5204 346355 57158 0 3 0x82 nanoslp syz-executor.1 1994 203540 0 0 3 0x14200 bored sosplice 82712 235281 57158 0 2 0x2 syz-executor.5 57158 354038 66679 0 3 0x82 thrsleep syz-fuzzer 57158 169774 66679 0 3 0x4000082 nanoslp syz-fuzzer 57158 122610 66679 0 3 0x4000082 thrsleep syz-fuzzer 57158 319527 66679 0 3 0x4000082 thrsleep syz-fuzzer 57158 34244 66679 0 3 0x4000082 thrsleep syz-fuzzer 57158 13748 66679 0 3 0x4000082 thrsleep syz-fuzzer 57158 380066 66679 0 3 0x4000082 kqread syz-fuzzer 57158 215914 66679 0 3 0x4000082 thrsleep syz-fuzzer 66679 231742 27869 0 3 0x10008a sigsusp ksh 27869 141139 24637 0 3 0x9a kqread sshd 24637 75249 1 0 3 0x88 kqread sshd 19409 443054 1836 74 3 0x1100092 bpf pflogd 1836 336861 1 0 3 0x80 netio pflogd 55671 278154 91097 73 3 0x1100090 kqread syslogd 91097 68975 1 0 3 0x100082 netio syslogd 81907 138170 1 0 3 0x100080 kqread resolvd 29101 93742 793 77 3 0x100092 kqread dhcpleased 79881 116158 793 77 3 0x100092 kqread dhcpleased 793 349261 1 0 3 0x80 kqread dhcpleased 38846 438274 0 0 3 0x14200 bored smr 13174 155572 0 0 2 0x14200 zerothread 97685 194435 0 0 3 0x14200 aiodoned aiodoned 58583 272310 0 0 3 0x14200 syncer update 31722 383295 0 0 3 0x14200 cleaner cleaner 69334 310455 0 0 3 0x14200 reaper reaper 51612 288239 0 0 3 0x14200 pgdaemon pagedaemon 11732 146602 0 0 3 0x14200 bored viomb 16674 180747 0 0 3 0x40014200 acpi0 acpi0 18785 203981 0 0 3 0x40014200 idle1 11155 259196 0 0 3 0x14200 bored softnet 49601 89861 0 0 3 0x14200 bored softnet 18894 518227 0 0 3 0x14200 bored softnet 29063 195057 0 0 3 0x14200 bored softnet 78704 231701 0 0 3 0x14200 bored systqmp 84338 120933 0 0 3 0x14200 bored systq 35204 65958 0 0 3 0x40014200 bored softclock 31173 66039 0 0 3 0x40014200 idle0 1 371469 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 71076 (syz-executor.7) thread 0xffff80002130d260 (384641) exclusive rwlock vcpu r = 0 (0xffff800024788bb0) #0 witness_lock+0x44d #1 vm_run+0x100 sys/arch/amd64/amd64/vmm.c:4536 #2 vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:685 #3 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xbc sys/kern/vfs_vnops.c:528 #5 sys_ioctl+0x4a2 #6 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #6 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10245 6773K 7737K 78643K 64688 0 pcb 13 16K 21K 78643K 1388 0 rtable 138 14K 16K 78643K 2141 0 ifaddr 79 18K 22K 78643K 802 0 sysctl 2 0K 2K 78643K 7 0 counters 50 34K 35K 78643K 280 0 ioctlops 0 0K 8K 78643K 7716 0 iov 0 0K 24K 78643K 1414 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1502 94K 94K 78643K 15192 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 104 0 VM map 2 1K 1K 78643K 2 0 sem 17 5K 10K 78643K 636 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 93K 78643K 11919 0 sigio 0 0K 0K 78643K 309 0 proc 73 91K 128K 78643K 1994 0 subproc 104 6K 7K 78643K 572 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 408 0 in_multi 47 3K 6K 78643K 745 0 ether_multi 1 0K 0K 78643K 68 0 mrt 1 0K 0K 78643K 68 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 253 1129K 1129K 78643K 253 0 exec 0 0K 2K 78643K 2741 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 471 845K 845K 78643K 72793 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 521 0 NDP 13 0K 1K 78643K 230 0 temp 153 4758K 70294K 78643K 86434 0 kqueue 12 18K 26K 78643K 758 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 120 777 0 774 11 10 1 4 0 8 0 rtentry 112 621 0 569 4 0 4 4 0 8 0 unpcb 144 6944 0 6929 82 76 6 10 0 8 5 syncache 296 34 0 34 9 9 0 1 0 8 0 tcpqe 32 10 0 10 5 5 0 1 0 8 0 tcpcb 736 2846 0 2842 97 95 2 14 0 8 1 arp 120 101 0 93 1 0 1 1 0 8 0 inpcb 320 8435 0 8428 113 108 5 12 0 8 4 nd6 48 147 0 136 1 0 1 1 0 8 0 pkpcb 40 13 0 13 3 3 0 1 0 8 0 kcovpl 48 44 0 36 1 0 1 1 0 8 0 ppxss 1256 31 0 31 9 9 0 1 0 8 0 pfstscr 40 43 0 43 1 1 0 1 0 8 0 pffrag 232 32 0 32 2 2 0 1 0 482 0 pffrnode 88 29 0 29 2 2 0 1 0 8 0 pffrent 40 76 0 76 4 4 0 1 0 8 0 pfosfp 40 1433 0 1008 5 0 5 5 0 8 0 pfosfpen 112 1433 0 714 21 0 21 21 0 8 0 pfrktable 1344 84 0 82 4 3 1 1 0 8 0 pftag 88 5 0 3 1 0 1 1 0 8 0 pfqueue 264 4 0 4 2 2 0 1 0 8 0 pfstitem 24 21 0 19 1 0 1 1 0 8 0 pfstkey 120 104 0 102 1 0 1 1 0 8 0 pfstate 336 61 0 59 2 1 1 2 0 8 0 pfrule 1360 281 0 276 2 1 1 2 0 8 0 rttmr 136 20 0 20 6 6 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2832 0 2571 47 22 25 29 0 8 3 art_table 32 2833 0 2571 4 0 4 4 0 8 0 art_node 16 620 0 576 1 0 1 1 0 8 0 sysvmsgpl 40 50 0 14 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 612 0 597 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 17071 0 15591 94 0 94 94 0 8 0 ffsino 272 17071 0 15591 101 1 100 100 0 8 0 nchpl 144 32975 0 31330 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 130157 0 130157 4 3 1 2 0 8 1 percpumem 16 152 0 115 1 0 1 1 0 8 0 vcpupl 2048 132 0 0 17 0 17 17 0 8 0 vmpool 568 226 0 94 10 0 10 10 0 8 0 pfiaddrpl 120 8 0 4 2 1 1 1 0 8 0 kstatmem 264 256 0 230 6 3 3 3 0 8 0 scsiplug 72 8 0 8 2 2 0 1 0 8 0 scxspl 216 94724 0 94724 34 33 1 8 0 8 1 plimitpl 152 2477 0 2462 1 0 1 1 0 8 0 sigapl 424 12217 0 12148 10 2 8 8 0 8 0 futexpl 64 105074 0 105072 3 2 1 1 0 8 0 knotepl 120 679 0 0 10 0 10 10 0 8 0 kqueuepl 216 1956 0 1948 35 29 6 6 0 8 5 pipepl 320 2240 0 2211 56 50 6 12 0 8 3 fdescpl 496 12136 0 12106 5 1 4 5 0 8 0 filepl 152 86689 0 86443 130 112 18 21 0 8 8 lockfpl 104 4871 0 4868 11 9 2 2 0 8 1 lockfspl 48 1738 0 1735 1 0 1 1 0 8 0 sessionpl 144 61 0 44 1 0 1 1 0 8 0 pgrppl 48 180 0 163 1 0 1 1 0 8 0 ucredpl 104 12605 0 12591 1 0 1 1 0 8 0 zombiepl 144 12148 0 12148 2 1 1 1 0 8 1 processpl 1064 12217 0 12148 5 0 5 5 0 8 0 procpl 672 34802 0 34722 26 17 9 9 0 8 1 srpgc 96 78 0 78 17 16 1 1 0 8 1 sosppl 168 99 0 99 17 17 0 1 0 8 0 sockpl 488 16176 0 16151 341 326 15 34 0 8 11 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 27 0 0 4 1 3 3 0 8 0 mcl12k 12288 39 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 58 0 0 5 2 3 3 0 8 0 mcl2k2 2112 16 0 0 2 0 2 2 0 8 0 mcl2k 2048 253 0 0 22 3 19 22 0 8 0 mtagpl 96 840 0 0 12 0 12 12 0 8 0 mbufpl 256 1216 0 0 51 1 50 50 0 8 0 bufpl 288 22075 0 15745 453 0 453 453 0 8 0 anonpl 24 2473855 0 2451533 343 180 163 181 0 186 11 amapchunkpl 152 217311 0 216659 92 62 30 42 0 158 0 amappl16 200 38487 0 37527 178 114 64 71 0 8 7 amappl15 192 2887 0 2886 1 0 1 1 0 8 0 amappl14 184 3024 0 3019 3 2 1 1 0 8 0 amappl13 176 1276 0 1274 1 0 1 1 0 8 0 amappl12 168 1301 0 1296 1 0 1 1 0 8 0 amappl11 160 863 0 842 2 1 1 2 0 8 0 amappl10 152 2351 0 2345 1 0 1 1 0 8 0 amappl9 144 2163 0 2161 1 0 1 1 0 8 0 amappl8 136 2685 0 2568 5 0 5 5 0 8 0 amappl7 128 1506 0 1490 1 0 1 1 0 8 0 amappl6 120 2118 0 2098 2 1 1 2 0 8 0 amappl5 112 10194 0 10174 1 0 1 1 0 8 0 amappl4 104 5302 0 5270 2 1 1 2 0 8 0 amappl3 96 37417 0 37370 2 0 2 2 0 8 0 amappl2 88 14696 0 14628 3 1 2 3 0 8 0 amappl1 80 291072 0 290446 22 7 15 20 0 8 0 amappl 88 71195 0 70966 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 12362 0 12200 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12362 0 12200 1 0 1 1 0 8 0 vmmpekpl 168 93843 0 93777 4 0 4 4 0 8 0 vmmpepl 168 1194859 0 1190587 316 113 203 210 0 357 7 vmsppl 368 12361 0 12200 16 1 15 15 0 8 0 rwobjpl 56 303459 0 295341 143 24 119 121 0 8 0 pdppl 4096 24731 0 24532 585 384 201 201 0 8 2 pvpl 32 4725893 0 4704580 551 338 213 255 0 265 15 pmappl 248 12361 0 12200 11 0 11 11 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1522 0 526 29 0 29 29 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8297bff0) 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 end of kernel end trace frame: 0x7f7ffffe9a80, count: -3 ddb{0}> machine ddbcpu 1 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{1}> trace done_flush() at done_flush+0x38 vm_run(ffff80002e47acc0) at vm_run+0x215 sys/arch/amd64/amd64/vmm.c:4562 vmmioctl(a00,c0205602,ffff80002e47acc0,1,ffff80002130d260) at vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:685 VOP_IOCTL(fffffd806ea9ee60,c0205602,ffff80002e47acc0,1,fffffd807f7d7618,ffff80002130d260) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806fea0278,c0205602,ffff80002e47acc0,ffff80002130d260) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:528 sys_ioctl(ffff80002130d260,ffff80002e47add8,ffff80002e47ae20) at sys_ioctl+0x4a2 syscall(ffff80002e47aea0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e47aea0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9094579730, count: -8