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 end trace frame: 0x0, count: -1 ddb{1}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff800035ffbc18 rbp 0 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0x100000001 r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0 r11 0 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8142f92b done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80003c3fced8 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{1}> show proc PROC (syz-executor) tid=7762 pid=86361 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800030bae550,0xffff800030baefc0 process=0xffff800036045d08 user=0xffff80003c3f8000, vmspace=0xfffffd806c8ff5d0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29683 43641 76632 0 2 0 syz-executor 55435 16084 65301 0 2 0 syz-executor 55435 367089 65301 0 3 0x4000080 fsleep syz-executor 86361 329111 6522 0 7 0 syz-executor *86361 7762 6522 0 7 0x4000000 syz-executor 80913 391430 7745 0 2 0 syz-executor 80913 77204 7745 0 2 0x4000000 syz-executor 21690 454569 3640 0 2 0 syz-executor 21690 182775 3640 0 3 0x4000080 fsleep syz-executor 21690 376263 3640 0 2 0x4000000 syz-executor 70450 142944 1321 0 2 0 syz-executor 70450 459749 1321 0 3 0x4000080 fsleep syz-executor 70450 489830 1321 0 3 0x4000080 fsleep syz-executor 3640 318039 10537 0 3 0x82 nanoslp syz-executor 1321 277789 10537 0 3 0x82 nanoslp syz-executor 19512 89726 0 0 3 0x14280 nfsidl nfsio 85026 224078 0 0 3 0x14280 nfsidl nfsio 26675 387719 0 0 3 0x14280 nfsidl nfsio 42283 467358 0 0 3 0x14280 nfsidl nfsio 32307 468548 0 0 3 0x14280 nfsidl nfsio 2324 1661 0 0 3 0x14280 nfsidl nfsio 90544 321197 0 0 3 0x14280 nfsidl nfsio 17012 213724 0 0 3 0x14280 nfsidl nfsio 94312 37408 0 0 3 0x14280 nfsidl nfsio 52353 31561 0 0 3 0x14280 nfsidl nfsio 89015 336234 0 0 3 0x14280 nfsidl nfsio 65009 172779 0 0 3 0x14280 nfsidl nfsio 15640 326769 0 0 3 0x14280 nfsidl nfsio 79838 472253 0 0 3 0x14280 nfsidl nfsio 19484 505873 0 0 3 0x14280 nfsidl nfsio 16724 89688 0 0 3 0x14280 nfsidl nfsio 31315 32810 0 0 3 0x14280 nfsidl nfsio 75377 456173 0 0 3 0x14280 nfsidl nfsio 14330 128381 0 0 3 0x14280 nfsidl nfsio 79279 81956 0 0 3 0x14280 nfsidl nfsio 70786 470105 1 0 3 0x100083 ttyin getty 6522 368528 10537 0 3 0x82 nanoslp syz-executor 7745 389510 10537 0 3 0x82 nanoslp syz-executor 65301 520051 10537 0 3 0x82 nanoslp syz-executor 76632 117640 10537 0 2 0x2 syz-executor 80740 238783 10537 0 3 0x82 nanoslp syz-executor 25701 290483 10537 0 2 0x2 syz-executor 10537 187866 81688 0 3 0x82 kqread syz-executor 81688 415253 576 0 3 0x10008a sigsusp ksh 576 278867 35670 0 3 0x98 kqread sshd-session 35670 479315 84842 0 3 0x92 kqread sshd-session 84842 395993 1 0 3 0x88 kqread sshd 47394 356181 62391 74 3 0x1100092 bpf pflogd 62391 147450 1 0 3 0x80 sbwait pflogd 53702 32238 10760 73 3 0x1100090 kqread syslogd 10760 102521 1 0 3 0x100082 sbwait syslogd 57365 452065 1 0 3 0x100080 kqread resolvd 5470 170331 54063 77 3 0x100092 kqread dhcpleased 50700 85966 54063 77 3 0x100092 kqread dhcpleased 54063 133864 1 0 3 0x80 kqread dhcpleased 71250 472442 0 0 3 0x14200 bored smr 89475 444737 0 0 2 0x14200 zerothread 19883 338225 0 0 3 0x14200 aiodoned aiodoned 88433 285458 0 0 3 0x14200 syncer update 38164 140523 0 0 3 0x14200 cleaner cleaner 37941 145446 0 0 3 0x14200 reaper reaper 60339 281497 0 0 3 0x14200 pgdaemon pagedaemon 27470 315424 0 0 3 0x14200 bored viomb 76027 485560 0 0 3 0x40014200 acpi0 acpi0 61070 216235 0 0 3 0x40014200 idle1 81111 499644 0 0 3 0x14200 bored softnet1 53219 32456 0 0 3 0x14200 bored softnet0 7557 384109 0 0 3 0x14200 bored systqmp 91415 162072 0 0 3 0x14200 bored systq 37422 135982 0 0 3 0x14200 tmoslp softclockmp 45757 399980 0 0 3 0x40014200 tmoslp softclock 54426 94407 0 0 3 0x40014200 idle0 1 357933 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 86361 (syz-executor) thread 0xffff800030bae7e8 (7762) exclusive rwlock vcpu r = 0 (0xffff800035ffb970) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_run+0xa2 sys/arch/amd64/amd64/vmm_machdep.c:-1 #3 vmmioctl+0x337 sys/dev/vmm/vmm.c:254 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #8 Xsyscall+0x128 Process 25701 (syz-executor) thread 0xffff8000ffffd230 (290483) exclusive rrwlock inode r = 0 (0xfffffd806de342f8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x98a sys/kern/vfs_lookup.c:567 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d6d50b0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11083 12112K 12390K 166960K 13975 0 pcb 17 16K 18K 166960K 624 0 rtable 193 11K 12K 166960K 910 0 pf 34 17K 81K 166960K 351 0 ifaddr 35 6K 9K 166960K 186 0 ifgroup 53 2K 3K 166960K 309 0 sysctl 4 1K 9K 166960K 23 0 counters 72 37K 38K 166960K 328 0 ioctlops 0 0K 4K 166960K 2202 0 iov 0 0K 16K 166960K 189 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1384 87K 88K 166960K 3298 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 18 16K 17K 166960K 139 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 2130 0 sigio 0 0K 0K 166960K 90 0 proc 73 115K 164K 166960K 903 0 subproc 72 4K 4K 166960K 138 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 342 0 in_multi 73 5K 7K 166960K 288 0 ether_multi 1 0K 0K 166960K 20 0 mrt 1 0K 0K 166960K 52 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 121 546K 546K 166960K 121 0 exec 0 0K 1K 166960K 1027 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 229 160K 183K 166960K 20431 0 UVM aobj 19 28K 28K 166960K 19 0 pinsyscall 42 84K 104K 166960K 3587 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 196 0 NDP 12 0K 2K 166960K 132 0 temp 76 9084K 9156K 166960K 102500 0 kqueue 15 24K 31K 166960K 429 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 361 0 358 5 1 4 4 0 8 3 rtentry 176 277 0 206 5 0 5 5 0 8 0 unpcb 144 1460 0 1443 12 8 4 4 0 8 3 syncache 336 21 0 21 6 5 1 1 0 8 1 tcpqe 32 4 0 4 3 2 1 1 0 8 1 tcpcb 736 959 0 952 24 20 4 7 0 8 3 arp 136 48 0 39 1 0 1 1 0 8 0 inpcb 328 2730 0 2717 33 26 7 10 0 8 5 nd6 152 53 0 34 2 0 2 2 0 8 0 pkpcb 40 11 0 11 5 4 1 1 0 8 1 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1192 97 0 95 3 2 1 1 0 8 0 pppxif 1576 11 0 11 2 2 0 1 0 8 0 pffrag 232 35 0 25 1 0 1 1 0 482 0 pffrnode 88 33 0 23 1 0 1 1 0 8 0 pffrent 40 64 0 53 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfstitem 24 81 0 40 1 0 1 1 0 8 0 pfstkey 128 81 0 40 2 0 2 2 0 8 0 pfstate 448 81 0 40 5 0 5 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 rttmr 136 7 0 7 2 1 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1297 0 917 39 12 27 31 0 8 2 art_table 40 1301 0 917 5 0 5 5 0 8 0 art_node 32 277 0 216 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semupl 112 5 0 5 3 2 1 1 0 8 1 semapl 112 126 0 110 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 5549 0 4081 93 0 93 93 0 8 0 ffsino 296 5549 0 4081 114 0 114 114 0 8 0 nchpl 144 8331 0 6604 65 0 65 65 0 8 0 rtmask 32 20 0 20 5 4 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 30621 0 30621 5 4 1 2 0 8 1 percpumem 16 179 0 128 1 0 1 1 0 8 0 vcpupl 3968 13 0 0 2 0 2 2 0 8 0 vmpool 848 13 0 0 2 0 2 2 0 8 0 kstatmem 264 200 0 172 6 3 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 11 0 11 5 4 1 1 0 8 1 scxspl 216 49955 0 49955 14 12 2 8 1 8 2 plimitpl 152 798 0 779 1 0 1 1 0 8 0 sigapl 424 2464 0 2397 10 2 8 8 0 8 0 knotepl 120 569 0 0 17 0 17 17 0 8 0 kqueuepl 224 874 0 862 13 11 2 5 0 8 0 pipepl 344 417 0 390 9 0 9 9 0 8 6 fdescpl 528 2406 0 2375 3 0 3 3 0 8 0 filepl 160 17353 0 17132 34 15 19 19 0 8 7 lockfpl 104 987 0 984 2 1 1 2 0 8 0 lockfspl 48 335 0 332 1 0 1 1 0 8 0 sessionpl 144 45 0 36 1 0 1 1 0 8 0 pgrppl 48 130 0 113 1 0 1 1 0 8 0 ucredpl 104 2991 0 2978 1 0 1 1 0 8 0 zombiepl 144 2674 0 2673 1 0 1 1 0 8 0 processpl 1232 2464 0 2397 6 0 6 6 0 8 0 procpl 664 5668 0 5594 9 1 8 8 0 8 0 sosppl 176 13 0 13 5 5 0 1 0 8 0 sockpl 752 4650 0 4617 55 42 13 20 0 8 8 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 11 0 0 2 0 2 2 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 44 0 0 6 0 6 6 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1787 0 0 112 0 112 112 0 8 0 bufpl 280 19054 0 12924 439 0 439 439 0 8 1 anonpl 32 12430 0 0 100 0 100 100 0 246 0 amapchunkpl 152 70046 0 69540 58 26 32 45 0 158 5 amappl16 200 7832 0 7794 64 43 21 26 0 8 11 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 525 0 524 1 0 1 1 0 8 0 amappl13 176 186 0 174 1 0 1 1 0 8 0 amappl12 168 2708 0 2679 2 0 2 2 0 8 0 amappl11 160 24 0 24 4 3 1 1 0 8 1 amappl10 152 137 0 123 1 0 1 1 0 8 0 amappl9 144 266 0 265 2 1 1 1 0 8 0 amappl8 136 133 0 130 1 0 1 1 0 8 0 amappl7 128 192 0 178 1 0 1 1 0 8 0 amappl6 120 239 0 237 1 0 1 1 0 8 0 amappl5 112 142 0 130 1 0 1 1 0 8 0 amappl4 104 397 0 376 1 0 1 1 0 8 0 amappl3 96 14529 0 14424 4 0 4 4 0 8 0 amappl2 88 828 0 766 2 0 2 2 0 8 0 amappl1 80 25443 0 24846 21 4 17 17 0 8 1 amappl 88 19070 0 18913 5 0 5 5 0 92 0 uvmvnodes 80 173 0 0 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 11 0 11 5 5 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 18 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2407 0 2376 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2407 0 2376 1 0 1 1 0 8 0 vmmpekpl 168 23013 0 22953 3 0 3 3 0 8 0 vmmpepl 168 167067 0 165152 133 26 107 109 0 357 5 vmsppl 488 2406 0 2376 5 0 5 5 0 8 0 rwobjpl 80 47934 0 46801 43 9 34 34 0 8 2 pdppl 4096 4847 0 4765 153 69 84 86 0 8 2 pvpl 32 21464 0 0 175 1 174 174 0 265 0 pmappl 256 2419 0 2376 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 480 0 116 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8391cff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x738beaa81b00, count: -3 ddb{0}> machine ddbcpu 1 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{1}> trace end trace frame: 0x0, count: -1