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(ffff800037419270) at vm_run+0x169 vmmioctl(a00,c0205602,ffff800037419270,1,ffff80002a21fac0) at vmmioctl+0x2a1 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806e1bd1b8,c0205602,ffff800037419270,1,fffffd807f7d7680,ffff80002a21fac0) at VOP_IOCTL+0x97 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8066212d30,c0205602,ffff800037419270,ffff80002a21fac0) at vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a21fac0,ffff800037419450,ffff8000374193a0) at sys_ioctl+0x4a2 syscall(ffff800037419450) at syscall+0x5ae mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800037419450) at syscall+0x5ae sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb01f43ec800, count: -8 ddb{0}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff800030d2e650 rbp 0xffff800037418fc0 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffd r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0xdb30270caf679a r11 0xf8b66fccc03e00a0 r12 0xffffffff82d50ff0 cpu_info_full_primary+0x1ff0 r13 0x246 r14 0xffff800030d2e000 r15 0xffff800037419270 rip 0xffffffff8101d3db done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff800037418e26 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{0}> show proc PROC (syz-executor.2) tid=415283 pid=63401 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a220010,0xffff80002a21f2d8 process=0xffff8000374ab570 user=0xffff800037414000, vmspace=0xfffffd8067cc5728 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63360 416969 366 0 2 0 syz-executor.7 63401 490137 74061 0 7 0 syz-executor.2 *63401 415283 74061 0 7 0x4000000 syz-executor.2 24661 369370 32514 0 2 0 syz-executor.5 12424 429035 70431 0 2 0 syz-executor.4 45582 321308 15169 0 2 0 syz-executor.6 45582 168965 15169 0 2 0x4000000 syz-executor.6 2316 22322 44581 0 2 0 syz-executor.1 2316 492384 44581 0 2 0x4000000 syz-executor.1 45417 46774 43605 0 2 0 syz-executor.0 45417 239095 43605 0 3 0x4000080 fifor syz-executor.0 86891 101126 9104 0 3 0x80 nanoslp syz-executor.3 86891 132749 9104 0 3 0x4000080 netio syz-executor.3 86891 446546 9104 0 3 0x4000080 fsleep syz-executor.3 366 367060 10265 0 3 0x82 nanoslp syz-executor.7 43605 346635 10265 0 3 0x82 nanoslp syz-executor.0 32514 261811 10265 0 3 0x82 nanoslp syz-executor.5 21057 21729 0 0 3 0x14200 acct acct 15169 117704 10265 0 3 0x82 nanoslp syz-executor.6 74061 297431 10265 0 3 0x82 nanoslp syz-executor.2 70431 100025 10265 0 2 0x2 syz-executor.4 9104 136462 10265 0 3 0x82 nanoslp syz-executor.3 27118 354622 0 0 3 0x14280 nfsidl nfsio 98047 339029 0 0 3 0x14280 nfsidl nfsio 27212 117491 0 0 3 0x14280 nfsidl nfsio 92430 55571 0 0 3 0x14280 nfsidl nfsio 95577 32292 0 0 3 0x14280 nfsidl nfsio 87285 320385 0 0 3 0x14280 nfsidl nfsio 16741 140798 0 0 3 0x14280 nfsidl nfsio 78608 61808 0 0 3 0x14280 nfsidl nfsio 35842 280397 0 0 3 0x14280 nfsidl nfsio 73239 306169 0 0 3 0x14280 nfsidl nfsio 80911 403836 0 0 3 0x14280 nfsidl nfsio 84894 186683 0 0 3 0x14280 nfsidl nfsio 85333 236962 0 0 3 0x14280 nfsidl nfsio 27753 462618 0 0 3 0x14280 nfsidl nfsio 32726 328889 0 0 3 0x14280 nfsidl nfsio 37195 359798 0 0 3 0x14280 nfsidl nfsio 50116 518037 0 0 3 0x14280 nfsidl nfsio 85324 466977 0 0 3 0x14280 nfsidl nfsio 62952 264175 0 0 3 0x14280 nfsidl nfsio 61332 139757 0 0 3 0x14280 nfsidl nfsio 44581 493351 10265 0 3 0x82 nanoslp syz-executor.1 38192 244485 0 0 3 0x14200 bored sosplice 10265 305952 60309 0 3 0x2000082 wait syz-fuzzer 10265 86049 60309 0 3 0x6000082 thrsleep syz-fuzzer 10265 356307 60309 0 3 0x6000082 thrsleep syz-fuzzer 10265 205034 60309 0 3 0x6000082 thrsleep syz-fuzzer 10265 148756 60309 0 3 0x6000082 wait syz-fuzzer 10265 57998 60309 0 3 0x6000082 wait syz-fuzzer 10265 31940 60309 0 3 0x6000082 thrsleep syz-fuzzer 10265 435393 60309 0 3 0x6000082 kqread syz-fuzzer 10265 132609 60309 0 3 0x6000082 wait syz-fuzzer 10265 432721 60309 0 3 0x6000082 thrsleep syz-fuzzer 10265 268258 60309 0 3 0x6000082 thrsleep syz-fuzzer 10265 12800 60309 0 3 0x6000082 wait syz-fuzzer 10265 422159 60309 0 3 0x6000082 thrsleep syz-fuzzer 10265 510627 60309 0 3 0x6000082 wait syz-fuzzer 10265 519274 60309 0 3 0x6000082 wait syz-fuzzer 10265 78865 60309 0 3 0x6000082 wait syz-fuzzer 60309 436801 21924 0 3 0x10008a sigsusp ksh 21924 176547 8948 0 3 0x9a kqread sshd 84749 230008 1 0 3 0x100083 ttyin getty 8948 204225 1 0 3 0x88 kqread sshd 16611 249569 88810 74 3 0x1100092 bpf pflogd 88810 105651 1 0 3 0x80 netio pflogd 24816 118434 20046 73 3 0x1100090 kqread syslogd 20046 96081 1 0 3 0x100082 netio syslogd 65468 60907 1 0 3 0x100080 kqread resolvd 3795 87444 57301 77 3 0x100092 kqread dhcpleased 44879 448847 57301 77 3 0x100092 kqread dhcpleased 57301 298433 1 0 3 0x80 kqread dhcpleased 47095 153013 0 0 3 0x14200 bored smr 97668 450104 0 0 2 0x14200 zerothread 86734 174860 0 0 3 0x14200 aiodoned aiodoned 61186 135638 0 0 3 0x14200 syncer update 27256 94768 0 0 3 0x14200 cleaner cleaner 1078 273707 0 0 3 0x14200 reaper reaper 62288 355532 0 0 3 0x14200 pgdaemon pagedaemon 34133 39388 0 0 3 0x14200 bored viomb 96465 29126 0 0 3 0x40014200 acpi0 acpi0 99526 445782 0 0 3 0x40014200 idle1 5111 339211 0 0 3 0x14200 bored softnet3 45729 242804 0 0 3 0x14200 bored softnet2 48964 217918 0 0 3 0x14200 bored softnet1 82744 331139 0 0 3 0x14200 bored softnet0 86463 433774 0 0 3 0x14200 bored systqmp 41416 443739 0 0 3 0x14200 bored systq 89308 492961 0 0 3 0x14200 tmoslp softclockmp 47705 390221 0 0 3 0x40014200 tmoslp softclock 39260 515620 0 0 3 0x40014200 idle0 1 106903 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 63401 (syz-executor.2) thread 0xffff80002a21fac0 (415283) exclusive rwlock vcpu r = 0 (0xffff800030d2e3b8) #0 witness_lock+0x447 #1 vm_run+0x77 sys/arch/amd64/amd64/vmm_machdep.c:3667 #2 vmmioctl+0x2a1 sys/dev/vmm/vmm.c:242 #3 VOP_IOCTL+0x97 sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 #5 sys_ioctl+0x4a2 #6 syscall+0x5ae mi_syscall sys/sys/syscall_mi.h:183 [inline] #6 syscall+0x5ae sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 6489K 7135K 166960K 18164 0 pcb 15 16K 17K 166960K 426 0 rtable 215 14K 15K 166960K 1643 0 pf 32 9K 10K 166960K 172 0 ifaddr 43 15K 17K 166960K 208 0 ifgroup 55 2K 2K 166960K 254 0 sysctl 3 0K 0K 166960K 3 0 counters 64 36K 36K 166960K 192 0 ioctlops 0 0K 4K 166960K 1838 0 iov 0 0K 32K 166960K 468 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1567 98K 98K 166960K 4102 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 67 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 452 0 dirhash 12 2K 2K 166960K 54 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 18 65K 81K 166960K 6078 0 sigio 0 0K 0K 166960K 210 0 proc 73 91K 127K 166960K 1598 0 subproc 104 6K 6K 166960K 494 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 311 0 in_multi 88 6K 7K 166960K 471 0 ether_multi 1 0K 0K 166960K 1 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 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 1352 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 422 234K 240K 166960K 60701 0 UVM aobj 131 4K 4K 166960K 139 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 166 0 NDP 12 0K 2K 166960K 152 0 temp 74 6772K 6904K 166960K 62229 0 kqueue 13 20K 26K 166960K 429 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 675 0 672 12 11 1 3 0 8 0 rtentry 112 477 0 378 4 0 4 4 0 8 0 unpcb 144 5857 0 5838 48 44 4 8 0 8 3 syncache 336 62 0 62 10 9 1 1 0 8 1 tcpqe 32 161 0 161 9 9 0 1 0 8 0 tcpcb 808 1314 0 1291 37 31 6 9 0 8 3 arp 120 91 0 75 1 0 1 1 0 8 0 inpcb 392 4350 0 4322 65 55 10 13 0 8 6 nd6 136 117 0 96 1 0 1 1 0 8 0 pkpcb 40 9 0 9 3 3 0 1 0 8 0 kcovpl 48 38 0 30 1 0 1 1 0 8 0 ppxss 1168 30 0 30 6 6 0 1 0 8 0 pffrag 232 14 0 13 1 0 1 1 0 482 0 pffrnode 88 14 0 13 1 0 1 1 0 8 0 pffrent 40 37 0 36 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 226 0 200 1 0 1 1 0 8 0 pfstkey 128 227 0 201 2 0 2 2 0 8 0 pfstate 376 227 0 201 7 3 4 7 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1840 0 1423 48 19 29 31 0 8 0 art_table 32 1841 0 1423 5 1 4 4 0 8 0 art_node 16 467 0 377 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 450 0 440 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 45 0 28 3 0 3 3 0 8 0 dino2pl 256 9277 0 7810 92 0 92 92 0 8 0 ffsino 272 9277 0 7810 98 0 98 98 0 8 0 nchpl 144 17778 0 16114 64 0 64 64 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 62902 0 62902 4 3 1 3 0 8 1 percpumem 16 110 0 64 1 0 1 1 0 8 0 vcpupl 2048 90 0 0 12 0 12 12 0 8 0 vmpool 696 104 0 14 9 0 9 9 0 8 0 kstatmem 264 152 0 128 2 0 2 2 0 8 0 scxspl 216 50848 0 50848 17 16 1 8 1 8 1 plimitpl 152 816 0 800 1 0 1 1 0 8 0 sigapl 424 6384 0 6313 11 2 9 9 0 8 0 futexpl 64 45326 0 45325 1 0 1 1 0 8 0 knotepl 120 395 0 0 10 0 10 10 0 8 0 kqueuepl 216 772 0 763 10 2 8 8 0 8 7 pipepl 320 1324 0 1296 44 38 6 13 0 8 3 fdescpl 496 6323 0 6292 14 10 4 5 0 8 0 filepl 152 36589 0 36341 76 57 19 22 0 8 7 lockfpl 104 1254 0 1252 3 2 1 2 0 8 0 lockfspl 48 489 0 487 1 0 1 1 0 8 0 sessionpl 144 54 0 37 1 0 1 1 0 8 0 pgrppl 48 92 0 75 1 0 1 1 0 8 0 ucredpl 104 4619 0 4607 1 0 1 1 0 8 0 zombiepl 144 6313 0 6313 1 0 1 1 0 8 1 processpl 1136 6384 0 6313 7 1 6 6 0 8 0 procpl 680 16494 0 16402 11 2 9 10 0 8 0 srpgc 96 48 0 48 12 11 1 1 0 8 1 sosppl 168 57 0 55 6 5 1 1 0 8 0 sockpl 584 10891 0 10841 101 92 9 20 0 8 4 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 11 0 0 2 0 2 2 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 284 0 0 35 5 30 35 0 8 0 mtagpl 96 159 0 0 3 0 3 3 0 8 0 mbufpl 256 828 0 0 39 0 39 39 0 8 0 bufpl 280 12947 0 6629 452 0 452 452 0 8 0 anonpl 24 712407 0 697866 127 26 101 108 0 186 0 amapchunkpl 152 191814 0 190893 68 25 43 48 0 158 0 amappl16 200 14127 0 13620 52 23 29 38 0 8 0 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 269 0 250 4 2 2 2 0 8 0 amappl13 176 20 0 20 2 2 0 1 0 8 0 amappl12 168 7453 0 7418 3 1 2 2 0 8 0 amappl11 160 62 0 48 1 0 1 1 0 8 0 amappl10 152 68 0 54 1 0 1 1 0 8 0 amappl9 144 196 0 196 11 11 0 1 0 8 0 amappl8 136 554 0 448 4 0 4 4 0 8 0 amappl7 128 297 0 271 2 0 2 2 0 8 0 amappl6 120 783 0 772 1 0 1 1 0 8 0 amappl5 112 260 0 247 1 0 1 1 0 8 0 amappl4 104 714 0 684 2 1 1 2 0 8 0 amappl3 96 37362 0 37268 4 1 3 3 0 8 0 amappl2 88 7102 0 7024 3 1 2 3 0 8 0 amappl1 80 32900 0 32346 23 10 13 23 0 8 0 amappl 88 59730 0 59467 8 1 7 7 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 72 138 0 8 3 0 3 3 0 8 0 uaddrrnd 24 6427 0 6306 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6427 0 6306 1 0 1 1 0 8 0 vmmpekpl 168 49067 0 48966 5 0 5 5 0 8 0 vmmpepl 168 406751 0 404107 288 156 132 150 0 357 2 vmsppl 448 6426 0 6306 15 1 14 14 0 8 0 rwobjpl 56 104271 0 96532 114 4 110 110 0 8 0 pdppl 4096 12861 0 12702 444 285 159 161 0 8 0 pvpl 32 45647 0 0 370 1 369 369 0 265 0 pmappl 248 6426 0 6306 9 1 8 8 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 970 0 455 15 0 15 15 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace done_flush() at done_flush+0x38 vm_run(ffff800037419270) at vm_run+0x169 vmmioctl(a00,c0205602,ffff800037419270,1,ffff80002a21fac0) at vmmioctl+0x2a1 sys/dev/vmm/vmm.c:242 VOP_IOCTL(fffffd806e1bd1b8,c0205602,ffff800037419270,1,fffffd807f7d7680,ffff80002a21fac0) at VOP_IOCTL+0x97 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8066212d30,c0205602,ffff800037419270,ffff80002a21fac0) at vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a21fac0,ffff800037419450,ffff8000374193a0) at sys_ioctl+0x4a2 syscall(ffff800037419450) at syscall+0x5ae mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800037419450) at syscall+0x5ae sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb01f43ec800, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e 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+0x27 end of kernel end trace frame: 0x6fbffb47b1b0, count: -3