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 0xffff8000fffe8d98 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 0xffffffff81ac42db done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80003c442c78 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{0}> show proc PROC (syz-executor) tid=443108 pid=70137 tcnt=3 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=0xffff80002ebada20,0xffff80002ebacd38 process=0xffff80003c3fa6a0 user=0xffff80003c43e000, vmspace=0xfffffd806ea921f8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7021 50997 71437 0 2 0 syz-executor 352 313441 20827 0 2 0 syz-executor 352 80189 20827 0 3 0x4000000 fltagain2 syz-executor 51629 321115 19341 0 2 0 syz-executor 51629 476821 19341 0 3 0x4000080 fsleep syz-executor 51629 212555 19341 0 3 0x4000080 fsleep syz-executor 70137 265737 38735 0 7 0 syz-executor *70137 443108 38735 0 7 0x4000000 syz-executor 70137 400638 38735 0 3 0x4000080 fsleep syz-executor 15392 391365 90360 60929 2 0x10 syz-executor 15392 60620 90360 60929 3 0x4000090 fsleep syz-executor 8724 448331 96713 -1 3 0x90 nanoslp syz-executor 8724 506402 96713 -1 3 0x4000090 kqread syz-executor 8724 357544 96713 -1 3 0x4000090 fsleep syz-executor 37512 12161 79698 0 2 0 syz-executor 37512 242737 79698 0 2 0x4000000 syz-executor 37512 25548 79698 0 3 0x4000080 fsleep syz-executor 29239 157560 1 0 3 0x100083 ttyopn getty 27154 458782 0 0 3 0x14200 acct acct 96713 349980 63044 0 2 0xc82 syz-executor 90360 365496 63044 0 2 0x2 syz-executor 61844 521338 63044 0 2 0x2 syz-executor 71437 258918 63044 0 2 0x2 syz-executor 79698 86595 63044 0 2 0x2 syz-executor 19341 382213 63044 0 3 0x82 nanoslp syz-executor 38735 515180 63044 0 3 0x82 nanoslp syz-executor 20827 297928 63044 0 3 0x82 nanoslp syz-executor 63044 135277 42793 0 3 0x82 kqread syz-executor 42793 67251 726 0 3 0x10008a sigsusp ksh 726 349646 17989 0 3 0x98 kqread sshd-session 17989 21533 65261 0 3 0x92 kqread sshd-session 65261 101586 1 0 3 0x88 kqread sshd 26105 50527 9319 74 3 0x1100092 bpf pflogd 9319 299437 1 0 3 0x80 sbwait pflogd 81749 266594 67229 73 3 0x1100090 kqread syslogd 67229 284414 1 0 3 0x100082 sbwait syslogd 18548 292128 1 0 3 0x100080 kqread resolvd 68419 76709 86069 77 3 0x100092 kqread dhcpleased 88302 342845 86069 77 3 0x100092 kqread dhcpleased 86069 518983 1 0 3 0x80 kqread dhcpleased 37508 375144 0 0 3 0x14200 bored smr 62379 24932 0 0 2 0x14200 zerothread 273 352649 0 0 3 0x14200 aiodoned aiodoned 47349 522295 0 0 3 0x14200 syncer update 32387 20840 0 0 3 0x14200 cleaner cleaner 62864 40319 0 0 3 0x14200 reaper reaper 66875 365437 0 0 3 0x14200 pgdaemon pagedaemon 58509 315140 0 0 3 0x14200 bored viomb 94088 109624 0 0 3 0x40014200 acpi0 acpi0 15022 9389 0 0 3 0x40014200 idle1 93948 245223 0 0 3 0x14200 bored softnet1 63144 237364 0 0 3 0x14200 bored softnet0 87453 70332 0 0 3 0x14200 bored systqmp 88379 68234 0 0 3 0x14200 bored systq 95487 449316 0 0 3 0x14200 tmoslp softclockmp 59499 150529 0 0 3 0x40014200 tmoslp softclock 3432 245002 0 0 3 0x40014200 idle0 1 23667 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 352 (syz-executor) thread 0xffff80003a3dda10 (80189) exclusive rwlock fdlock r = 0 (0xffff8000357c9300) #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 sys_socketpair+0x2fa sys/kern/uipc_syscalls.c:492 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #4 Xsyscall+0x128 Process 70137 (syz-executor) thread 0xffff80002ebacfc0 (443108) exclusive rwlock vcpu r = 0 (0xffff8000fffe8af0) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11109 12192K 14021K 166960K 13777 0 pcb 17 15K 16K 166960K 234 0 rtable 205 11K 11K 166960K 562 0 pf 39 18K 81K 166960K 143 0 ifaddr 38 6K 7K 166960K 103 0 ifgroup 61 2K 3K 166960K 173 0 sysctl 4 1K 9K 166960K 19 0 counters 76 37K 38K 166960K 190 0 ioctlops 0 0K 4K 166960K 1742 0 iov 0 0K 16K 166960K 46 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1411 89K 89K 166960K 2571 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 122 0 dirhash 12 2K 3K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 1176 0 sigio 0 0K 0K 166960K 26 0 proc 72 115K 164K 166960K 676 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 129 0 in_multi 67 5K 7K 166960K 164 0 ether_multi 1 0K 0K 166960K 18 0 mrt 2 0K 0K 166960K 42 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 526 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 223 150K 170K 166960K 12553 0 UVM aobj 60 70K 70K 166960K 63 0 pinsyscall 42 84K 106K 166960K 2376 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 106 0 NDP 14 0K 2K 166960K 75 0 temp 68 9081K 9201K 166960K 45744 0 kqueue 16 26K 30K 166960K 224 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 120 113 0 110 1 0 1 1 0 8 0 rtentry 176 164 0 87 6 0 6 6 0 8 0 unpcb 144 938 0 914 9 5 4 6 0 8 3 syncache 336 8 0 8 2 2 0 1 0 8 0 tcpcb 736 439 0 435 10 6 4 7 0 8 3 arp 136 27 0 15 1 0 1 1 0 8 0 inpcb 328 1403 0 1395 13 9 4 12 0 8 2 nd6 152 32 0 13 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 47 0 45 1 0 1 1 0 8 0 pppxif 1576 2 0 2 1 0 1 1 0 8 1 pffrag 232 11 0 2 1 0 1 1 0 482 0 pffrnode 88 10 0 2 1 0 1 1 0 8 0 pffrent 40 16 0 7 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 2 0 2 2 2 0 1 0 8 0 pfsrclim 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 110 0 58 1 0 1 1 0 8 0 pfstkey 128 110 0 58 2 0 2 2 0 8 0 pfstate 448 110 0 58 9 2 7 9 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 rttmr 136 6 0 6 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 678 0 346 29 4 25 29 0 8 0 art_table 40 682 0 346 5 0 5 5 0 8 0 art_node 32 163 0 95 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 118 0 108 1 0 1 1 0 8 0 shmpl 112 26 0 3 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3823 0 2367 93 0 93 93 0 8 0 ffsino 296 3823 0 2367 114 0 114 114 0 8 0 nchpl 144 5446 0 3740 64 0 64 64 0 8 0 rtmask 32 7 0 7 2 1 1 1 0 8 1 vnodes 216 4539 0 0 253 0 253 253 0 8 0 namei 1024 18222 0 18222 2 1 1 2 0 8 1 percpumem 16 110 0 57 1 0 1 1 0 8 0 vcpupl 3968 34 0 0 5 0 5 5 0 8 0 vmpool 848 34 0 0 4 0 4 4 0 8 0 kstatmem 264 114 0 80 3 0 3 3 0 8 0 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 32145 0 32145 11 8 3 8 1 8 3 plimitpl 152 442 0 425 1 0 1 1 0 8 0 sigapl 424 1516 0 1468 9 2 7 8 0 8 0 knotepl 120 559 0 0 17 0 17 17 0 8 0 kqueuepl 224 448 0 434 6 1 5 5 0 8 4 pipepl 344 211 0 182 3 0 3 3 0 8 0 fdescpl 528 1478 0 1447 3 0 3 3 0 8 0 filepl 160 9367 0 9133 18 4 14 17 0 8 3 lockfpl 104 533 0 530 2 1 1 2 0 8 0 lockfspl 48 230 0 227 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 65 0 48 1 0 1 1 0 8 0 ucredpl 104 1689 0 1673 1 0 1 1 0 8 0 zombiepl 144 1468 0 1468 1 0 1 1 0 8 1 processpl 1232 1516 0 1468 6 2 4 6 0 8 0 procpl 664 3353 0 3295 8 2 6 8 0 8 0 sosppl 176 8 0 8 1 0 1 1 0 8 1 sockpl 752 2490 0 2455 29 18 11 17 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 33 0 0 5 1 4 5 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 301 0 0 19 0 19 19 0 8 0 bufpl 280 12125 0 5995 438 0 438 438 0 8 0 anonpl 32 11676 0 0 96 1 95 95 0 246 0 amapchunkpl 152 42936 0 42488 32 2 30 32 0 158 8 amappl16 200 5156 0 5122 32 8 24 28 0 8 20 amappl15 192 17 0 16 1 0 1 1 0 8 0 amappl14 184 439 0 438 1 0 1 1 0 8 0 amappl13 176 142 0 130 1 0 1 1 0 8 0 amappl12 168 1735 0 1706 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 68 0 54 1 0 1 1 0 8 0 amappl9 144 266 0 266 1 1 0 1 0 8 0 amappl8 136 106 0 104 1 0 1 1 0 8 0 amappl7 128 172 0 159 1 0 1 1 0 8 0 amappl6 120 167 0 165 1 0 1 1 0 8 0 amappl5 112 103 0 93 1 0 1 1 0 8 0 amappl4 104 311 0 291 1 0 1 1 0 8 0 amappl3 96 8544 0 8438 4 0 4 4 0 8 0 amappl2 88 575 0 515 2 0 2 2 0 8 0 amappl1 80 15142 0 14545 18 4 14 17 0 8 0 amappl 88 11611 0 11459 5 0 5 5 0 92 0 uvmvnodes 80 137 0 0 3 0 3 3 0 8 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 7 0 7 2 2 0 1 0 8 0 dma128 128 257 0 257 3 2 1 1 0 8 1 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 9 0 9 3 2 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 62 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1478 0 1447 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1478 0 1447 1 0 1 1 0 8 0 vmmpekpl 168 13624 0 13582 3 0 3 3 0 8 0 vmmpepl 168 100942 0 99038 110 2 108 108 0 357 13 vmsppl 488 1477 0 1447 5 1 4 5 0 8 0 rwobjpl 80 29428 0 28312 35 1 34 34 0 8 5 pdppl 4096 3031 0 2928 137 32 105 109 0 8 2 pvpl 32 19290 0 0 156 0 156 156 0 265 0 pmappl 256 1511 0 1447 5 0 5 5 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 344 0 53 9 0 9 9 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(ffff8000299bdff0) 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: 0x7b66806b8660, count: -3