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 0xffff80003c433c18 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 0xffffffff811fe69b done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80003c3f7f08 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{1}> show proc PROC (syz-executor) tid=481324 pid=31381 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c42f500,0xffffffff839163d0 process=0xffff80003c471368 user=0xffff80003c3f3000, vmspace=0xfffffd80760193e8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69199 332622 37837 0 2 0 syz-executor 85613 31414 39055 0 7 0 syz-executor 85613 490460 39055 0 2 0x4000000 syz-executor 31381 162899 3872 0 2 0 syz-executor *31381 481324 3872 0 7 0x4000000 syz-executor 9980 182671 28268 0 3 0x80 nanoslp syz-executor 9980 126639 28268 0 3 0x4000080 netcon syz-executor 82471 413842 70641 0 2 0 syz-executor 82471 437918 70641 0 3 0x4000080 fsleep syz-executor 63327 105174 37053 -1 2 0x10 syz-executor 63327 76408 37053 -1 3 0x4000090 fsleep syz-executor 63327 213672 37053 -1 3 0x4000090 fsleep syz-executor 63327 69145 37053 -1 3 0x4000090 fsleep syz-executor 7132 203496 84585 0 3 0x3000 suspend syz-executor 7132 256655 84585 0 2 0x4081000 syz-executor 7132 63038 84585 0 3 0x4081000 inode syz-executor 7132 320503 84585 0 3 0x4081000 inode syz-executor 49380 472409 0 0 3 0x14280 nfsidl nfsio 90689 119102 0 0 3 0x14280 nfsidl nfsio 83009 84572 0 0 3 0x14280 nfsidl nfsio 89410 228123 0 0 3 0x14280 nfsidl nfsio 49401 106632 0 0 3 0x14280 nfsidl nfsio 78613 138002 0 0 3 0x14280 nfsidl nfsio 93991 258277 0 0 3 0x14280 nfsidl nfsio 66681 127599 0 0 3 0x14280 nfsidl nfsio 70317 165570 0 0 3 0x14280 nfsidl nfsio 25963 208380 0 0 3 0x14280 nfsidl nfsio 99186 253770 0 0 3 0x14280 nfsidl nfsio 48922 336317 0 0 3 0x14280 nfsidl nfsio 22196 440060 0 0 3 0x14280 nfsidl nfsio 8176 300610 0 0 3 0x14280 nfsidl nfsio 22045 37806 0 0 3 0x14280 nfsidl nfsio 21864 297288 0 0 3 0x14280 nfsidl nfsio 16055 468887 0 0 3 0x14280 nfsidl nfsio 43786 405291 0 0 3 0x14280 nfsidl nfsio 47387 495784 0 0 3 0x14280 nfsidl nfsio 62858 81265 0 0 3 0x14280 nfsidl nfsio 39055 362253 62284 0 3 0x82 nanoslp syz-executor 1370 149699 1 0 3 0x100083 ttyin getty 88428 260765 42127 0 3 0x82 sbwait sshd-session 16961 155884 62284 0 3 0x82 nanoslp syz-executor 3872 190635 62284 0 3 0x82 nanoslp syz-executor 28268 477642 62284 0 3 0x82 nanoslp syz-executor 84585 83355 62284 0 3 0x82 nanoslp syz-executor 37053 170231 62284 0 3 0x82 nanoslp syz-executor 70641 265009 62284 0 3 0x82 nanoslp syz-executor 37837 162802 62284 0 3 0x82 nanoslp syz-executor 62284 465856 94344 0 3 0x82 kqread syz-executor 94344 139436 98812 0 3 0x10008a sigsusp ksh 98812 294108 42661 0 3 0x98 kqread sshd-session 42661 495915 42127 0 3 0x92 kqread sshd-session 42127 489272 1 0 3 0x88 kqread sshd 6442 153830 4900 74 3 0x1100092 bpf pflogd 4900 38672 1 0 3 0x80 sbwait pflogd 25072 483951 2964 73 3 0x1100090 kqread syslogd 2964 114838 1 0 3 0x100082 sbwait syslogd 9562 3908 1 0 3 0x100080 kqread resolvd 75896 186324 97266 77 3 0x100092 kqread dhcpleased 94507 436271 97266 77 3 0x100092 kqread dhcpleased 97266 42281 1 0 3 0x80 kqread dhcpleased 42674 86607 0 0 3 0x14200 bored smr 81650 12219 0 0 2 0x14200 zerothread 29531 479725 0 0 3 0x14200 aiodoned aiodoned 66038 248736 0 0 3 0x14200 syncer update 59810 485265 0 0 3 0x14200 cleaner cleaner 85661 37420 0 0 3 0x14200 reaper reaper 95153 115968 0 0 3 0x14200 pgdaemon pagedaemon 78928 367130 0 0 3 0x14200 bored viomb 47929 63076 0 0 3 0x40014200 acpi0 acpi0 89379 216630 0 0 3 0x40014200 idle1 24238 256951 0 0 3 0x14200 bored softnet1 95568 398913 0 0 3 0x14200 bored softnet0 53376 495200 0 0 3 0x14200 smrbar systqmp 24478 304619 0 0 3 0x14200 bored systq 91107 250265 0 0 3 0x14200 tmoslp softclockmp 60818 230049 0 0 3 0x40014200 tmoslp softclock 84109 52360 0 0 3 0x40014200 idle0 1 62614 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 31381 (syz-executor) thread 0xffff80003c42eaa0 (481324) exclusive rwlock vcpu r = 0 (0xffff80003c433970) #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:775 #8 Xsyscall+0x128 Process 7132 (syz-executor) thread 0xffff80003c42fa30 (256655) exclusive rrwlock inode r = 0 (0xfffffd806f8c1b70) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 53376 (systqmp) thread 0xffff8000ffffe7c8 (495200) shared rwlock systqmp r = 0 (0xffffffff838059a8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11074 12101K 12423K 166960K 13020 0 pcb 18 13K 14K 166960K 549 0 rtable 145 7K 8K 166960K 545 0 pf 37 18K 81K 166960K 93 0 ifaddr 32 5K 8K 166960K 84 0 ifgroup 59 2K 2K 166960K 106 0 sysctl 4 1K 9K 166960K 15 0 counters 72 37K 38K 166960K 132 0 ioctlops 0 0K 4K 166960K 1702 0 iov 0 0K 16K 166960K 42 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1347 85K 85K 166960K 2163 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 63 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1124 0 sigio 0 0K 0K 166960K 20 0 proc 72 115K 164K 166960K 625 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 182 0 in_multi 49 3K 7K 166960K 175 0 ether_multi 1 0K 0K 166960K 11 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 542 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 261 184K 202K 166960K 11324 0 UVM aobj 32 26K 26K 166960K 36 0 pinsyscall 45 90K 105K 166960K 2305 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 1K 166960K 130 0 NDP 13 0K 2K 166960K 53 0 temp 78 8684K 8752K 166960K 40318 0 kqueue 18 26K 30K 166960K 186 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 120 106 0 102 1 0 1 1 0 8 0 rtentry 176 157 0 106 6 1 5 6 0 8 0 unpcb 144 735 0 716 5 3 2 4 0 8 1 syncache 336 7 0 7 1 1 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 350 0 339 3 1 2 2 0 8 0 arp 136 22 0 15 1 0 1 1 0 8 0 inpcb 328 1317 0 1302 7 2 5 5 0 8 3 nd6 152 32 0 23 1 0 1 1 0 8 0 pkpcb 40 7 0 7 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 26 0 26 2 1 1 1 0 8 1 pppxif 1504 1 0 1 1 0 1 1 0 8 1 pffrag 232 5 0 1 2 1 1 1 0 482 0 pffrnode 88 5 0 1 2 1 1 1 0 8 0 pffrent 40 7 0 3 2 1 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 6 0 5 1 0 1 1 0 8 0 pftag 88 4 0 3 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 448 1 0 0 1 0 1 1 0 8 0 pfrule 1360 18 0 7 2 0 2 2 0 8 1 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 4 0 1 4 0 4 4 0 8 1 art_heap4 256 699 0 402 31 11 20 31 0 8 0 art_table 40 703 0 403 5 1 4 5 0 8 0 art_node 32 156 0 108 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 1 0 1 0 8 0 semapl 112 61 0 51 1 0 1 1 0 8 0 shmpl 112 19 0 1 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 3418 0 1905 96 1 95 96 0 8 0 ffsino 296 3418 0 1905 118 1 117 118 0 8 0 nchpl 144 4947 0 3244 64 0 64 64 0 8 0 rtmask 32 6 0 6 1 1 0 1 0 8 0 vnodes 216 3856 0 0 215 0 215 215 0 8 0 namei 1024 15711 0 15711 3 2 1 2 0 8 1 percpumem 16 81 0 30 1 0 1 1 0 8 0 vcpupl 3968 12 0 1 2 0 2 2 0 8 0 vmpool 848 14 0 3 2 0 2 2 0 8 0 kstatmem 264 68 0 38 3 0 3 3 0 8 0 scsiplug 72 15 0 15 2 1 1 1 0 8 1 scxspl 216 19801 0 19801 12 11 1 8 1 8 1 plimitpl 152 233 0 214 1 0 1 1 0 8 0 sigapl 424 1441 0 1372 9 1 8 8 0 8 0 knotepl 120 555 0 0 17 0 17 17 0 8 0 kqueuepl 224 426 0 413 7 2 5 5 0 8 4 pipepl 344 189 0 162 3 0 3 3 0 8 0 fdescpl 528 1404 0 1371 3 0 3 3 0 8 0 filepl 160 8167 0 7936 16 3 13 13 0 8 2 lockfpl 104 352 0 350 1 0 1 1 0 8 0 lockfspl 48 135 0 133 1 0 1 1 0 8 0 sessionpl 144 26 0 16 1 0 1 1 0 8 0 pgrppl 48 41 0 22 1 0 1 1 0 8 0 ucredpl 104 1771 0 1757 1 0 1 1 0 8 0 zombiepl 144 1374 0 1372 1 0 1 1 0 8 0 processpl 1232 1441 0 1372 6 0 6 6 0 8 0 procpl 664 2802 0 2723 9 1 8 8 0 8 0 sosppl 176 6 0 6 1 1 0 1 0 8 0 sockpl 752 2196 0 2158 17 8 9 11 0 8 5 mcl64k 65536 22 0 0 3 0 3 3 0 8 0 mcl16k 16384 19 0 0 3 0 3 3 0 8 0 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 16 0 0 2 0 2 2 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 225 0 0 15 0 15 15 0 8 0 bufpl 280 6898 0 762 439 0 439 439 0 8 0 anonpl 32 8018 0 0 65 0 65 65 0 246 0 amapchunkpl 152 38015 0 37504 38 7 31 33 0 158 9 amappl16 200 3867 0 3700 19 10 9 16 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 4 0 4 1 1 0 1 0 8 0 amappl13 176 455 0 454 1 0 1 1 0 8 0 amappl12 168 1790 0 1746 3 0 3 3 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 79 0 76 1 0 1 1 0 8 0 amappl7 128 92 0 91 1 0 1 1 0 8 0 amappl6 120 300 0 285 1 0 1 1 0 8 0 amappl5 112 171 0 160 1 0 1 1 0 8 0 amappl4 104 459 0 427 1 0 1 1 0 8 0 amappl3 96 6696 0 6600 4 1 3 3 0 8 0 amappl2 88 1536 0 1454 2 0 2 2 0 8 0 amappl1 80 13977 0 13292 16 0 16 16 0 8 0 amappl 88 10367 0 10193 5 0 5 5 0 92 0 uvmvnodes 80 128 0 0 3 0 3 3 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 128 255 0 255 3 2 1 1 0 8 1 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 35 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1404 0 1371 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1404 0 1371 1 0 1 1 0 8 0 vmmpekpl 168 12147 0 12108 3 0 3 3 0 8 0 vmmpepl 168 93807 0 91558 105 6 99 103 0 357 0 vmsppl 488 1403 0 1371 5 0 5 5 0 8 0 rwobjpl 80 25565 0 24233 30 0 30 30 0 8 0 pdppl 4096 2843 0 2759 124 39 85 85 0 8 1 pvpl 32 18112 0 0 147 1 146 146 0 265 0 pmappl 256 1417 0 1374 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 317 0 59 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8383cff0) 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: 0x720243448050, count: -3 ddb{0}> machine ddbcpu 1 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{1}> trace end trace frame: 0x0, count: -1