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(ffff800029828e90) at vm_run+0x302 sys/arch/amd64/amd64/vmm.c:4485 vmmioctl(a00,c0205602,ffff800029828e90,1,ffff800024adb260) at vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:661 VOP_IOCTL(fffffd806e854128,c0205602,ffff800029828e90,1,fffffd807f7d77e0,ffff800024adb260) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80686cc798,c0205602,ffff800029828e90,ffff800024adb260) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800024adb260,ffff800029828fa8,ffff800029829000) at sys_ioctl+0x49e syscall(ffff800029829070) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa498f783940, count: -8 ddb> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff8000297da518 rbp 0xffff800029828bf0 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffd r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0x35049e4f8ca9e9e4 r11 0xca503d615bcc475d r12 0xffff8000297da250 r13 0xffffffff8294c548 dt_prov_static r14 0xffff8000297d9f00 r15 0xffff800029828e90 rip 0xffffffff81801a90 done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff800029828a56 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb> show proc PROC (syz-executor.7) pid=157774 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff800024adb500,0xffff800024adbcf0 process=0xffff80002168cbe8 user=0xffff800029824000, vmspace=0xfffffd807f015990 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 90606 417176 43182 0 2 0 syz-executor.0 48683 397874 19532 0 2 0 syz-executor.7 *48683 157774 19532 0 7 0x4000000 syz-executor.7 84879 476578 33761 0 2 0 syz-executor.5 84879 415772 33761 0 3 0x4000080 dtread syz-executor.5 60508 224664 41716 0 2 0x10 syz-executor.6 60508 27227 41716 0 3 0x4000090 fsleep syz-executor.6 1069 347674 1593 0 2 0 syz-executor.2 1069 191876 1593 0 3 0x4000080 fsleep syz-executor.2 91834 82067 25668 0 2 0x2 syz-executor.3 41716 360665 25668 0 3 0x82 nanoslp syz-executor.6 1593 226075 25668 0 3 0x82 nanoslp syz-executor.2 51327 131107 0 0 3 0x14280 nfsidl nfsio 75927 229842 0 0 3 0x14280 nfsidl nfsio 54661 512523 0 0 3 0x14280 nfsidl nfsio 92882 406477 0 0 3 0x14280 nfsidl nfsio 46651 509991 0 0 3 0x14280 nfsidl nfsio 73931 453706 0 0 3 0x14280 nfsidl nfsio 67241 373166 0 0 3 0x14280 nfsidl nfsio 51391 405115 0 0 3 0x14280 nfsidl nfsio 12456 173504 0 0 3 0x14280 nfsidl nfsio 90876 423838 0 0 3 0x14280 nfsidl nfsio 97216 446851 0 0 3 0x14280 nfsidl nfsio 44599 224239 0 0 3 0x14280 nfsidl nfsio 24272 444478 0 0 3 0x14280 nfsidl nfsio 70445 55034 0 0 3 0x14280 nfsidl nfsio 48449 346970 0 0 3 0x14280 nfsidl nfsio 95225 130552 0 0 3 0x14280 nfsidl nfsio 25766 54637 0 0 3 0x14280 nfsidl nfsio 35849 379139 0 0 3 0x14280 nfsidl nfsio 69720 291544 0 0 3 0x14280 nfsidl nfsio 7850 458016 0 0 3 0x14280 nfsidl nfsio 97337 191836 1 0 3 0x100083 ttyin getty 28354 296559 25668 0 2 0x2 syz-executor.1 19532 19607 25668 0 3 0x82 nanoslp syz-executor.7 904 58121 0 0 3 0x14200 bored sosplice 72415 104944 0 0 3 0x14200 acct acct 77708 312015 25668 0 2 0x2 syz-executor.4 33761 365706 25668 0 3 0x82 nanoslp syz-executor.5 43182 458376 25668 0 3 0x82 nanoslp syz-executor.0 25668 289628 63049 0 3 0x82 thrsleep syz-fuzzer 25668 457859 63049 0 3 0x4000082 nanoslp syz-fuzzer 25668 385455 63049 0 3 0x4000082 thrsleep syz-fuzzer 25668 335605 63049 0 3 0x4000082 kqread syz-fuzzer 25668 263598 63049 0 3 0x4000082 thrsleep syz-fuzzer 25668 342900 63049 0 3 0x4000082 thrsleep syz-fuzzer 25668 462459 63049 0 3 0x4000082 thrsleep syz-fuzzer 25668 425937 63049 0 3 0x4000082 thrsleep syz-fuzzer 63049 69061 96681 0 3 0x10008a sigsusp ksh 96681 225638 53248 0 3 0x9a kqread sshd 53248 24752 1 0 3 0x88 kqread sshd 34819 407945 19068 73 3 0x1100090 kqread syslogd 19068 347444 1 0 3 0x100082 netio syslogd 25101 290173 1 0 3 0x100080 kqread resolvd 86981 323105 69516 77 3 0x100092 kqread dhcpleased 59352 141519 69516 77 3 0x100092 kqread dhcpleased 69516 73821 1 0 3 0x80 kqread dhcpleased 71410 454807 0 0 3 0x14200 bored smr 7326 21437 0 0 2 0x14200 zerothread 71019 204039 0 0 3 0x14200 aiodoned aiodoned 27816 414957 0 0 3 0x14200 syncer update 73744 293716 0 0 3 0x14200 cleaner cleaner 72638 30211 0 0 3 0x14200 reaper reaper 64381 145049 0 0 3 0x14200 pgdaemon pagedaemon 20657 194244 0 0 3 0x14200 bored viomb 26030 75103 0 0 3 0x40014200 acpi0 acpi0 39238 490674 0 0 3 0x14200 bored softnet 58410 258622 0 0 3 0x14200 bored softnet 77604 166380 0 0 3 0x14200 bored softnet 67061 467983 0 0 3 0x14200 bored softnet 31114 107373 0 0 3 0x14200 bored systqmp 48957 169667 0 0 3 0x14200 bored systq 94204 40809 0 0 3 0x40014200 bored softclock 74589 251705 0 0 3 0x40014200 idle0 1 455727 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 10169 6429K 7758K 78643K 18880 0 pcb 15 16K 19K 78643K 3257 0 rtable 207 8K 11K 78643K 1916 0 ifaddr 78 16K 18K 78643K 838 0 sysctl 2 0K 0K 78643K 2 0 counters 25 17K 17K 78643K 64 0 ioctlops 0 0K 4K 78643K 1030 0 iov 0 0K 16K 78643K 379 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1440 90K 90K 78643K 3588 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 37 0 VM map 2 0K 0K 78643K 2 0 sem 19 1K 1K 78643K 24 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 85K 78643K 3747 0 sigio 0 0K 0K 78643K 55 0 proc 58 59K 75K 78643K 826 0 subproc 104 6K 7K 78643K 208 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 192 0 in_multi 77 5K 6K 78643K 379 0 ether_multi 1 0K 0K 78643K 13 0 mrt 2 0K 0K 78643K 9 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 2K 78643K 1114 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 271 233K 238K 78643K 21711 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 105 0 NDP 11 0K 2K 78643K 119 0 temp 317 5112K 6136K 78643K 68516 0 kqueue 12 18K 24K 78643K 270 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 465 0 462 9 8 1 3 0 8 0 rtentry 112 243 0 155 4 0 4 4 0 8 0 unpcb 136 3349 0 3334 33 32 1 8 0 8 0 syncache 296 16 0 16 5 5 0 1 0 8 0 tcpqe 32 296 0 296 2 2 0 1 0 8 0 tcpcb 736 1423 0 1419 55 53 2 18 0 8 1 arp 88 34 0 20 1 0 1 1 0 8 0 ipq 40 5 0 5 2 2 0 1 0 8 0 ipqe 40 15 0 15 2 2 0 1 0 8 0 inpcb 312 7423 0 7414 56 52 4 14 0 8 3 nd6 48 89 0 71 1 0 1 1 0 8 0 pkpcb 40 9 0 9 2 2 0 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1152 21 0 21 6 6 0 1 0 8 0 pfstscr 40 8 0 6 1 0 1 1 0 8 0 pfosfp 40 36 0 35 1 0 1 1 0 8 0 pfosfpen 112 36 0 0 2 0 2 2 0 8 0 pfrktable 1344 580 0 577 1 0 1 1 0 8 0 pftag 88 9 0 6 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 16 0 14 2 1 1 1 0 8 0 pfstate 336 8 0 7 2 1 1 1 0 8 0 pfrule 1360 265 0 244 3 1 2 2 0 8 0 rttmr 64 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 824 0 454 32 5 27 29 0 8 0 art_table 32 825 0 454 4 0 4 4 0 8 0 art_node 16 242 0 162 1 0 1 1 0 8 0 sysvmsgpl 40 32 0 19 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 18 0 1 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6521 0 5079 91 0 91 91 0 8 0 ffsino 240 6521 0 5079 86 0 86 86 0 8 0 nchpl 144 11576 0 9938 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 42483 0 42482 2 1 1 2 0 8 0 vcpupl 1984 10 0 0 2 0 2 2 0 8 0 vmpool 528 10 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 169 0 166 4 3 1 1 0 8 0 kstatmem 264 100 0 78 2 0 2 2 0 8 0 scxspl 216 39328 0 39328 14 12 2 8 0 8 2 plimitpl 152 431 0 417 1 0 1 1 0 8 0 sigapl 424 4073 0 4009 8 0 8 8 0 8 0 futexpl 64 37855 0 37853 1 0 1 1 0 8 0 knotepl 120 40887 0 40807 17 14 3 7 0 8 0 kqueuepl 184 802 0 794 15 11 4 4 0 8 3 pipepl 304 829 0 801 17 14 3 8 0 8 0 fdescpl 432 3995 0 3969 4 0 4 4 0 8 0 filepl 120 30793 0 30549 49 38 11 15 0 8 3 lockfpl 104 1042 0 1040 2 1 1 2 0 8 0 lockfspl 48 359 0 357 1 0 1 1 0 8 0 sessionpl 144 32 0 16 1 0 1 1 0 8 0 pgrppl 48 35 0 19 1 0 1 1 0 8 0 ucredpl 96 3643 0 3630 1 0 1 1 0 8 0 zombiepl 144 4009 0 4009 1 0 1 1 0 8 1 processpl 1000 4073 0 4009 11 2 9 9 0 8 0 procpl 672 9946 0 9871 13 5 8 9 0 8 0 sosppl 168 29 0 29 7 7 0 1 0 8 0 sockpl 448 11289 0 11262 182 175 7 30 0 8 3 mcl64k 65536 125 0 125 8 7 1 1 0 8 1 mcl16k 16384 52 0 52 7 7 0 1 0 8 0 mcl12k 12288 130 0 130 9 8 1 1 0 8 1 mcl9k 9216 35 0 35 9 8 1 1 0 8 1 mcl8k 8192 289 0 289 10 9 1 1 0 8 1 mcl4k 4096 395 0 395 4 3 1 1 0 8 1 mcl2k2 2112 32 0 32 7 6 1 1 0 8 1 mcl2k 2048 74224 0 74156 23 13 10 17 0 8 0 mtagpl 96 1324 0 760 18 3 15 17 0 8 0 mbufpl 256 147761 0 146941 80 25 55 63 0 8 0 bufpl 288 10110 0 3709 458 0 458 458 0 8 0 anonpl 24 753052 0 736839 206 88 118 127 0 188 14 amapchunkpl 152 62037 0 61438 43 17 26 34 0 158 0 amappl16 200 11009 0 10445 80 47 33 43 0 8 2 amappl15 192 267 0 265 1 0 1 1 0 8 0 amappl14 184 238 0 235 1 0 1 1 0 8 0 amappl13 176 407 0 402 1 0 1 1 0 8 0 amappl12 168 1274 0 1268 2 1 1 1 0 8 0 amappl11 160 275 0 256 1 0 1 1 0 8 0 amappl10 152 782 0 769 1 0 1 1 0 8 0 amappl9 144 617 0 614 1 0 1 1 0 8 0 amappl8 136 1254 0 1176 3 0 3 3 0 8 0 amappl7 128 630 0 618 1 0 1 1 0 8 0 amappl6 120 371 0 352 2 1 1 2 0 8 0 amappl5 112 2821 0 2808 1 0 1 1 0 8 0 amappl4 104 1352 0 1324 2 1 1 2 0 8 0 amappl3 96 12321 0 12276 2 0 2 2 0 8 0 amappl2 88 5984 0 5915 3 1 2 3 0 8 0 amappl1 80 94971 0 94370 22 7 15 19 0 8 0 amappl 88 20958 0 20812 4 0 4 4 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 4005 0 3969 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4005 0 3969 1 0 1 1 0 8 0 vmmpekpl 168 31716 0 31657 3 0 3 3 0 8 0 vmmpepl 168 387884 0 385442 174 54 120 128 0 357 0 vmsppl 272 4004 0 3969 6 3 3 3 0 8 0 rwobjpl 24 99143 0 91559 48 0 48 48 0 8 0 pdppl 4096 8016 0 7948 294 220 74 74 0 8 6 pvpl 32 1583195 0 1563325 391 197 194 254 0 265 24 pmappl 216 4004 0 3969 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1406 0 577 25 0 25 25 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff800029828e90) at vm_run+0x302 sys/arch/amd64/amd64/vmm.c:4485 vmmioctl(a00,c0205602,ffff800029828e90,1,ffff800024adb260) at vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:661 VOP_IOCTL(fffffd806e854128,c0205602,ffff800029828e90,1,fffffd807f7d77e0,ffff800024adb260) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80686cc798,c0205602,ffff800029828e90,ffff800024adb260) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800024adb260,ffff800029828fa8,ffff800029829000) at sys_ioctl+0x49e syscall(ffff800029829070) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa498f783940, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace done_flush() at done_flush+0x38 vm_run(ffff800029828e90) at vm_run+0x302 sys/arch/amd64/amd64/vmm.c:4485 vmmioctl(a00,c0205602,ffff800029828e90,1,ffff800024adb260) at vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:661 VOP_IOCTL(fffffd806e854128,c0205602,ffff800029828e90,1,fffffd807f7d77e0,ffff800024adb260) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80686cc798,c0205602,ffff800029828e90,ffff800024adb260) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800024adb260,ffff800029828fa8,ffff800029829000) at sys_ioctl+0x49e syscall(ffff800029829070) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa498f783940, count: -8