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 end trace frame: 0x0, count: -1 ddb{0}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff8000fffd9d18 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 0xffffffff81f1820b done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80002a2ae188 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{0}> show proc PROC (syz-executor) tid=204289 pid=86681 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe8a80,0xffffffff83a379f8 process=0xffff8000fffef038 user=0xffff80002a2a9000, vmspace=0xfffffd805f3c33f8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86681 519060 14230 0 7 0 syz-executor 86681 179199 14230 0 3 0x4000080 ttyout syz-executor 86681 183181 14230 0 3 0x4000080 ttyout syz-executor *86681 204289 14230 0 7 0x4000000 syz-executor 80491 354259 69582 60929 3 0x90 nanoslp syz-executor 80491 368584 69582 60929 3 0x4000090 ttyin syz-executor 80491 392712 69582 60929 3 0x4000090 fsleep syz-executor 24519 157433 50068 0 3 0x80 nanoslp syz-executor 24519 45160 50068 0 3 0x4000080 ttyin syz-executor 39070 182955 37581 0 2 0xc80 syz-executor 39070 97487 37581 0 3 0x4000080 kqread syz-executor 39070 318130 37581 0 3 0x4000080 netcon syz-executor 39070 176459 37581 0 3 0x4000080 fsleep syz-executor 90620 98885 0 0 3 0x14200 acct acct 23106 46109 67689 0 2 0x2 syz-executor 32347 425494 1 0 3 0x100083 ttyin getty 14230 164100 67689 0 3 0x82 nanoslp syz-executor 37581 402816 67689 0 2 0xc82 syz-executor 50068 424083 67689 0 2 0xc82 syz-executor 7544 223111 67689 0 3 0x82 wait syz-executor 69582 365148 67689 0 3 0x82 nanoslp syz-executor 74551 97221 67689 0 2 0xc82 syz-executor 58573 3028 67689 0 2 0xc82 syz-executor 67689 502641 95588 0 3 0x82 kqread syz-executor 95588 507157 59295 0 3 0x10008a sigsusp ksh 59295 203905 42857 0 3 0x98 kqread sshd-session 42857 225817 16696 0 3 0x92 kqread sshd-session 16696 264736 1 0 3 0x88 kqread sshd 51914 103998 54543 74 3 0x1100092 bpf pflogd 54543 421491 1 0 3 0x80 sbwait pflogd 20474 138080 15978 73 3 0x1100090 kqread syslogd 15978 380016 1 0 3 0x100082 sbwait syslogd 27246 456622 1 0 3 0x100080 kqread resolvd 9751 218041 1263 77 3 0x100092 kqread dhcpleased 95991 518987 1263 77 3 0x100092 kqread dhcpleased 1263 187568 1 0 3 0x80 kqread dhcpleased 20449 190506 0 0 3 0x14200 bored smr 83129 398117 0 0 3 0x14200 pgzero zerothread 99889 141041 0 0 3 0x14200 aiodoned aiodoned 29014 378727 0 0 3 0x14200 syncer update 91043 462925 0 0 3 0x14200 cleaner cleaner 97471 317607 0 0 3 0x14200 reaper reaper 67749 281301 0 0 3 0x14200 pgdaemon pagedaemon 90570 101288 0 0 3 0x14200 bored viomb 62238 144320 0 0 3 0x40014200 acpi0 acpi0 42627 12442 0 0 3 0x40014200 idle1 64329 254632 0 0 3 0x14200 bored softnet1 77434 160545 0 0 3 0x14200 bored softnet0 51971 255832 0 0 3 0x14200 bored systqmp 67922 450615 0 0 3 0x14200 bored systq 48631 420637 0 0 3 0x14200 tmoslp softclockmp 70383 175942 0 0 3 0x40014200 tmoslp softclock 65713 404607 0 0 3 0x40014200 idle0 1 435976 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 86681 (syz-executor) thread 0xffff8000fffe82b8 (204289) Process 23106 (syz-executor) thread 0xffff80003c3bcd20 (46109) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11102 12102K 13981K 166960K 13662 0 pcb 18 18K 19K 166960K 482 0 rtable 223 13K 14K 166960K 653 0 pf 35 17K 19K 166960K 178 0 ifaddr 39 7K 8K 166960K 134 0 ifgroup 55 2K 2K 166960K 222 0 sysctl 3 1K 9K 166960K 15 0 counters 70 37K 38K 166960K 244 0 ioctlops 0 0K 4K 166960K 1904 0 iov 0 0K 24K 166960K 71 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1352 85K 86K 166960K 2434 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 71 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 1555 0 sigio 0 0K 0K 166960K 25 0 proc 72 115K 164K 166960K 809 0 subproc 72 4K 4K 166960K 102 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 181 0 in_multi 85 6K 7K 166960K 199 0 ether_multi 1 0K 0K 166960K 18 0 mrt 2 0K 0K 166960K 35 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 625 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 254 167K 186K 166960K 15678 0 UVM aobj 43 22K 22K 166960K 48 0 pinsyscall 42 84K 106K 166960K 2785 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 148 0 NDP 12 0K 1K 166960K 95 0 temp 79 9088K 9184K 166960K 71552 0 kqueue 16 24K 30K 166960K 289 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 181 0 178 3 2 1 2 0 8 0 rtentry 176 194 0 112 6 0 6 6 0 8 0 unpcb 144 1200 0 1183 12 11 1 6 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 585 0 580 22 17 5 13 0 8 4 arp 136 31 0 16 1 0 1 1 0 8 0 inpcb 328 2059 0 2049 26 17 9 12 0 8 7 nd6 152 39 0 18 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 2 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 68 0 68 1 0 1 1 0 8 1 pppxif 1576 5 0 5 3 2 1 1 0 8 1 pffrag 232 16 0 3 1 0 1 1 0 482 0 pffrnode 88 13 0 2 1 0 1 1 0 8 0 pffrent 40 28 0 14 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 pfsrclim 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 119 0 31 1 0 1 1 0 8 0 pfstkey 128 119 0 31 3 0 3 3 0 8 0 pfstate 448 119 0 31 10 0 10 10 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 951 0 558 35 5 30 31 0 8 3 art_table 40 953 0 558 5 0 5 5 0 8 0 art_node 32 192 0 120 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 68 0 58 1 0 1 1 0 8 0 shmpl 112 36 0 5 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 4459 0 2989 93 0 93 93 0 8 0 ffsino 296 4459 0 2989 114 0 114 114 0 8 0 nchpl 144 6640 0 4924 64 0 64 64 0 8 0 rtmask 32 14 0 14 3 3 0 1 0 8 0 vnodes 216 4925 0 0 274 0 274 274 0 8 0 namei 1024 23177 0 23177 2 1 1 2 0 8 1 percpumem 16 137 0 87 1 0 1 1 0 8 0 vcpupl 3968 9 0 0 2 0 2 2 0 8 0 vmpool 848 9 0 0 1 0 1 1 0 8 0 kstatmem 264 146 0 118 3 0 3 3 0 8 0 scsiplug 72 4 0 4 4 3 1 1 0 8 1 scxspl 216 38412 0 38412 14 11 3 8 1 8 3 plimitpl 152 350 0 331 1 0 1 1 0 8 0 sigapl 424 1886 0 1838 8 1 7 8 0 8 0 knotepl 120 562 0 0 17 0 17 17 0 8 0 kqueuepl 224 523 0 511 7 5 2 3 0 8 1 pipepl 344 247 0 220 3 0 3 3 0 8 0 fdescpl 528 1839 0 1808 3 0 3 3 0 8 0 filepl 160 12703 0 12473 23 9 14 16 0 8 3 lockfpl 104 768 0 766 1 0 1 1 0 8 0 lockfspl 48 220 0 218 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 55 0 38 1 0 1 1 0 8 0 ucredpl 104 2091 0 2076 1 0 1 1 0 8 0 zombiepl 144 1841 0 1838 1 0 1 1 0 8 0 processpl 1232 1886 0 1838 6 2 4 6 0 8 0 procpl 664 4326 0 4269 8 2 6 8 0 8 0 sosppl 176 12 0 12 2 2 0 1 0 8 0 sockpl 752 3491 0 3461 36 25 11 17 0 8 7 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1209 0 0 76 0 76 76 0 8 0 bufpl 280 14661 0 8532 439 0 439 439 0 8 0 anonpl 32 11671 0 0 94 0 94 94 0 246 0 amapchunkpl 152 52865 0 52317 41 14 27 35 0 158 4 amappl16 200 5846 0 5811 40 25 15 28 0 8 6 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 466 0 465 1 0 1 1 0 8 0 amappl13 176 128 0 116 1 0 1 1 0 8 0 amappl12 168 2102 0 2072 2 0 2 2 0 8 0 amappl11 160 10 0 10 2 2 0 1 0 8 0 amappl10 152 64 0 50 1 0 1 1 0 8 0 amappl9 144 265 0 265 1 1 0 1 0 8 0 amappl8 136 135 0 133 1 0 1 1 0 8 0 amappl7 128 158 0 144 1 0 1 1 0 8 0 amappl6 120 189 0 187 1 0 1 1 0 8 0 amappl5 112 111 0 101 1 0 1 1 0 8 0 amappl4 104 310 0 290 1 0 1 1 0 8 0 amappl3 96 10860 0 10733 4 0 4 4 0 8 0 amappl2 88 568 0 508 2 0 2 2 0 8 0 amappl1 80 15762 0 15155 17 3 14 17 0 8 0 amappl 88 14653 0 14471 5 0 5 5 0 92 0 uvmvnodes 80 150 0 0 4 0 4 4 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 256 0 256 3 2 1 1 0 8 1 dma64 64 8 0 8 2 2 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 47 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1839 0 1808 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1839 0 1808 1 0 1 1 0 8 0 vmmpekpl 168 15360 0 15316 3 0 3 3 0 8 0 vmmpepl 168 120865 0 118900 114 8 106 109 0 357 10 vmsppl 488 1838 0 1808 6 1 5 5 0 8 0 rwobjpl 80 33208 0 32038 34 0 34 34 0 8 2 pdppl 4096 3703 0 3625 116 36 80 87 0 8 2 pvpl 32 17707 0 0 143 0 143 143 0 265 0 pmappl 256 1847 0 1808 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 394 0 65 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace end trace frame: 0x0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299adff0) 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: 0x74252664caa0, count: -3