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 0xffff8000371e6900 rbp 0 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffff7fffffffffc r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0 r11 0 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8246052b done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80002a0f0ea8 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{1}> show proc PROC (syz-executor) tid=481117 pid=77984 tcnt=2 stat=onproc flags process=8000010 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800029fe6cf0,0xffffffff83625980 process=0xffff8000371dfab0 user=0xffff80002a0ec000, vmspace=0xfffffd806bf31898 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77984 219811 3642 0 2 0x8000010 syz-executor *77984 481117 3642 0 7 0xc000010 syz-executor 54753 235408 31307 0 7 0x8000000 syz-executor 54753 334365 31307 0 3 0xc000080 ttyin syz-executor 71917 252310 33673 0 2 0x8100002 sh 95173 315935 13803 0 2 0x8000000 syz-executor 95173 180411 13803 0 3 0xc000080 fsleep syz-executor 12720 67927 50927 0 2 0x8100002 sh 47352 320479 61917 0 2 0x8000000 syz-executor 47352 336118 61917 0 3 0xc000080 fsleep syz-executor 47352 436351 61917 0 3 0xc000080 fsleep syz-executor 47352 282727 61917 0 3 0xc000080 fsleep syz-executor 81707 114310 55080 0 2 0x8100002 sh 75004 282897 80814 60929 2 0x8000010 syz-executor 75004 205461 80814 60929 3 0xc000090 fsleep syz-executor 75004 288630 80814 60929 3 0xc000090 fsleep syz-executor 33673 364912 63564 0 3 0x8000082 wait syz-executor 50927 292755 63564 0 3 0x8000082 wait syz-executor 3642 388511 63564 0 3 0x8000082 nanoslp syz-executor 55080 353749 63564 0 3 0x8000082 wait syz-executor 13803 218313 63564 0 3 0x8000082 nanoslp syz-executor 80814 190333 63564 0 3 0x8000082 nanoslp syz-executor 31307 398201 63564 0 3 0x8000082 nanoslp syz-executor 61917 423056 63564 0 3 0x8000082 nanoslp syz-executor 72754 267973 0 0 3 0x14200 acct acct 68820 309100 0 0 3 0x14280 nfsidl nfsio 65646 13207 0 0 3 0x14280 nfsidl nfsio 39075 430356 0 0 3 0x14280 nfsidl nfsio 39418 46643 0 0 3 0x14280 nfsidl nfsio 94725 8047 0 0 3 0x14280 nfsidl nfsio 96957 251931 0 0 3 0x14280 nfsidl nfsio 3464 310980 0 0 3 0x14280 nfsidl nfsio 1056 115927 0 0 3 0x14280 nfsidl nfsio 97608 23014 0 0 3 0x14280 nfsidl nfsio 24522 253606 0 0 3 0x14280 nfsidl nfsio 77046 453847 0 0 3 0x14280 nfsidl nfsio 29712 193316 0 0 3 0x14280 nfsidl nfsio 33393 330938 0 0 3 0x14280 nfsidl nfsio 99150 215537 0 0 3 0x14280 nfsidl nfsio 88636 121346 0 0 3 0x14280 nfsidl nfsio 90759 266389 0 0 3 0x14280 nfsidl nfsio 2268 492228 0 0 3 0x14280 nfsidl nfsio 57884 153740 0 0 3 0x14280 nfsidl nfsio 61323 228622 0 0 3 0x14280 nfsidl nfsio 16524 56625 0 0 3 0x14280 nfsidl nfsio 40248 82671 1 0 3 0x18100083 ttyopn getty 81767 165507 0 0 3 0x14200 bored sosplice 63564 339290 53189 0 3 0x8000082 kqread syz-executor 53189 131645 76896 0 3 0x810008a sigsusp ksh 76896 90176 65123 0 3 0x18000098 kqread sshd-session 65123 392930 18816 0 3 0x18000092 kqread sshd-session 18816 340781 1 0 3 0x18000088 kqread sshd 73500 56424 82135 74 3 0x19100092 bpf pflogd 82135 372333 1 0 3 0x18000080 sbwait pflogd 77212 410373 11230 73 2 0x19100010 syslogd 11230 395793 1 0 3 0x18100082 sbwait syslogd 11364 347068 1 0 3 0x18100080 kqread resolvd 58649 348224 37994 77 3 0x18100092 kqread dhcpleased 79873 34610 37994 77 3 0x18100092 kqread dhcpleased 37994 452044 1 0 3 0x18000080 kqread dhcpleased 11924 29086 0 0 3 0x14200 bored smr 87273 346553 0 0 2 0x14200 zerothread 71674 265657 0 0 3 0x14200 aiodoned aiodoned 16824 141273 0 0 3 0x14200 syncer update 63929 341621 0 0 3 0x14200 cleaner cleaner 7964 242747 0 0 3 0x14200 reaper reaper 75897 126588 0 0 3 0x14200 pgdaemon pagedaemon 944 346983 0 0 3 0x14200 bored viomb 29073 166274 0 0 3 0x40014200 acpi0 acpi0 69232 209864 0 0 3 0x40014200 idle1 90116 352450 0 0 3 0x14200 bored softnet3 48794 456560 0 0 3 0x14200 bored softnet2 37991 450041 0 0 3 0x14200 bored softnet1 2735 228542 0 0 3 0x14200 bored softnet0 66959 178577 0 0 3 0x14200 bored systqmp 52629 294869 0 0 3 0x14200 bored systq 26056 483115 0 0 3 0x14200 tmoslp softclockmp 71936 101991 0 0 3 0x40014200 tmoslp softclock 57617 322731 0 0 3 0x40014200 idle0 1 401256 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 77984 (syz-executor) thread 0xffff800029fe7710 (481117) exclusive rwlock vcpu r = 0 (0xffff8000371e6668) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 vm_run+0xa2 #2 vmmioctl+0x37b sys/dev/vmm/vmm.c:242 #3 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xf6 sys/kern/vfs_vnops.c:525 #5 sys_ioctl+0x67c #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 77212 (syslogd) thread 0xffff8000ffffd960 (410373) exclusive rrwlock inode r = 0 (0xfffffd806e4c71b0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2927 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10211 10303K 10733K 166960K 16460 0 pcb 17 15K 16K 166960K 540 0 rtable 169 16K 19K 166960K 5481 0 pf 39 18K 23K 166960K 969 0 ifaddr 34 7K 9K 166960K 727 0 ifgroup 59 2K 2K 166960K 799 0 sysctl 4 1K 1K 166960K 11 0 counters 66 36K 37K 166960K 452 0 ioctlops 0 0K 4K 166960K 1998 0 iov 0 0K 28K 166960K 293 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1624 102K 103K 166960K 6668 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 13K 166960K 55 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 193 0 dirhash 15 2K 3K 166960K 78 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 18 65K 89K 166960K 4837 0 sigio 0 0K 0K 166960K 69 0 proc 70 91K 140K 166960K 5259 0 subproc 104 6K 7K 166960K 2240 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 346 0 in_multi 63 4K 7K 166960K 1942 0 ether_multi 1 0K 0K 166960K 28 0 mrt 0 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 3100 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 242 107K 109K 166960K 37626 0 UVM aobj 111 7K 7K 166960K 114 0 pinsyscall 43 86K 108K 166960K 10094 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 157 0 NDP 15 0K 1K 166960K 540 0 temp 78 6816K 6948K 166960K 105321 0 kqueue 13 20K 29K 166960K 385 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 727 0 724 6 5 1 3 0 8 0 rtentry 112 1935 0 1869 6 3 3 4 0 8 0 unpcb 144 3299 0 3281 36 35 1 6 0 8 0 syncache 336 13 0 13 9 9 0 1 0 8 0 tcpcb 808 1129 0 1121 41 39 2 8 0 8 0 arp 120 350 0 338 1 0 1 1 0 8 0 inpcb 336 4557 0 4544 69 67 2 12 0 8 0 nd6 136 529 0 514 1 0 1 1 0 8 0 pkpcb 40 17 0 17 9 9 0 1 0 8 0 kcovpl 48 172 0 164 1 0 1 1 0 8 0 ppxss 1168 21 0 21 14 13 1 1 0 8 1 pfstscr 40 3 0 3 2 2 0 1 0 8 0 pffrag 232 25 0 22 3 2 1 1 0 482 0 pffrnode 88 23 0 20 3 2 1 1 0 8 0 pffrent 40 79 0 76 3 2 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 33 0 27 1 0 1 1 0 8 0 pfanchor 1288 185 0 177 1 0 1 1 0 8 0 pftag 88 9 0 7 2 1 1 1 0 8 0 pfqueue 264 2 0 1 1 0 1 1 0 8 0 pfstitem 24 417 0 375 1 0 1 1 0 8 0 pfstkey 128 438 0 396 2 0 2 2 0 8 0 pfstate 376 426 0 386 9 3 6 6 0 8 0 pfrule 1344 109 0 72 5 1 4 4 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 7609 0 7322 39 13 26 30 0 8 8 art_table 32 7610 0 7322 4 0 4 4 0 8 1 art_node 16 1927 0 1869 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 191 0 181 1 0 1 1 0 8 0 shmpl 112 111 0 3 4 0 4 4 0 8 0 dirhash 1024 63 0 43 3 0 3 3 0 8 0 dino2pl 256 6523 0 4696 115 0 115 115 0 8 0 ffsino 272 6523 0 4696 122 0 122 122 0 8 0 nchpl 144 10316 0 8401 71 0 71 71 0 8 0 uvmvnodes 80 9807 0 0 201 0 201 201 0 8 0 vnodes 216 9807 0 0 545 0 545 545 0 8 0 namei 1024 57946 0 57946 17 16 1 2 0 8 1 percpumem 16 240 0 193 1 0 1 1 0 8 0 vcpupl 3904 7 0 0 1 0 1 1 0 8 0 vmpool 696 14 0 7 1 0 1 1 0 8 0 pfiaddrpl 120 26 0 3 1 0 1 1 0 8 0 kstatmem 264 412 0 386 5 3 2 3 0 8 0 scsiplug 72 6 0 6 4 4 0 1 0 8 0 scxspl 216 89590 0 89590 25 24 1 8 1 8 1 plimitpl 152 960 0 942 1 0 1 1 0 8 0 sigapl 424 4836 0 4764 9 0 9 9 0 8 0 futexpl 64 50203 0 50197 19 18 1 1 0 8 0 knotepl 120 987 0 0 19 1 18 18 0 8 0 kqueuepl 216 1134 0 1125 12 11 1 5 0 8 0 pipepl 320 1205 0 1178 24 21 3 8 0 8 0 fdescpl 496 4792 0 4760 5 0 5 5 0 8 0 filepl 152 33323 0 33074 79 69 10 20 0 8 0 lockfpl 104 1253 0 1250 2 1 1 2 0 8 0 lockfspl 48 469 0 466 1 0 1 1 0 8 0 sessionpl 144 187 0 178 1 0 1 1 0 8 0 pgrppl 48 402 0 385 1 0 1 1 0 8 0 ucredpl 104 5784 0 5768 1 0 1 1 0 8 0 zombiepl 144 4764 0 4764 2 1 1 1 0 8 1 processpl 1152 4836 0 4764 7 1 6 6 0 8 0 procpl 648 9081 0 9001 11 2 9 9 0 8 1 srpgc 96 28 0 28 11 11 0 1 0 8 0 sosppl 168 13 0 13 9 8 1 1 0 8 1 sockpl 664 8616 0 8582 103 99 4 16 0 8 0 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 10 0 0 2 0 2 2 0 8 0 mcl4k 4096 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 374 0 0 33 4 29 33 0 8 0 mtagpl 96 13 0 0 1 0 1 1 0 8 0 mbufpl 256 851 0 0 33 0 33 33 0 8 0 bufpl 280 17164 0 7357 701 0 701 701 0 8 0 anonpl 24 656962 0 648609 146 82 64 77 0 185 13 amapchunkpl 152 120956 0 120200 99 67 32 42 0 158 2 amappl16 200 10219 0 10205 129 120 9 15 0 8 6 amappl15 192 14 0 14 1 1 0 1 0 8 0 amappl14 184 441 0 429 1 0 1 1 0 8 0 amappl13 176 12 0 12 3 3 0 1 0 8 0 amappl12 168 7987 0 7952 3 1 2 2 0 8 0 amappl11 160 86 0 72 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 142 0 141 1 0 1 1 0 8 0 amappl8 136 27 0 25 1 0 1 1 0 8 0 amappl7 128 428 0 415 1 0 1 1 0 8 0 amappl6 120 1774 0 1770 1 0 1 1 0 8 0 amappl5 112 780 0 768 1 0 1 1 0 8 0 amappl4 104 798 0 777 1 0 1 1 0 8 0 amappl3 96 23059 0 22936 4 0 4 4 0 8 0 amappl2 88 2887 0 2816 2 0 2 2 0 8 0 amappl1 80 31561 0 30963 17 3 14 15 0 8 0 amappl 88 35933 0 35761 7 2 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 2 0 2 2 2 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 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 113 0 3 2 0 2 2 0 8 0 uaddrrnd 24 4807 0 4768 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4807 0 4768 1 0 1 1 0 8 0 vmmpekpl 168 41849 0 41789 4 0 4 4 0 8 0 vmmpepl 168 294602 0 292740 175 83 92 97 0 357 10 vmsppl 440 4806 0 4768 7 2 5 5 0 8 0 rwobjpl 56 89768 0 78865 162 6 156 157 0 8 1 pdppl 4096 9621 0 9543 341 261 80 84 0 8 2 pvpl 32 45827 0 0 368 2 366 366 0 265 0 pmappl 248 4806 0 4768 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 851 0 429 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83469ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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: 0x7dff30c8fb30, count: -3 ddb{0}> machine ddbcpu 1 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{1}> trace end trace frame: 0x0, count: -1