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 0xffff80003c4c3c18 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 0xffff80003c4cc9e8 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{1}> show proc PROC (syz-executor) tid=85609 pid=90544 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2747e0,0xffffffff839163d0 process=0xffff8000fffed828 user=0xffff80003c4c8000, vmspace=0xfffffd806c9787b8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90544 191803 56663 0 7 0 syz-executor *90544 85609 56663 0 7 0x4000000 syz-executor 10037 241973 19540 0 2 0x10 syz-executor 10037 203603 19540 0 3 0x4000090 fsleep syz-executor 90994 519096 35829 0 2 0 syz-executor 90994 314162 35829 0 3 0x4000080 fsleep syz-executor 75513 76488 20673 0 2 0 syz-executor 75513 402673 20673 0 2 0x4000000 syz-executor 75513 96801 20673 0 3 0x4000080 fsleep syz-executor 14955 474968 45300 0 3 0 vmmaplk syz-executor 14955 214824 45300 0 2 0x4000000 syz-executor 39020 64666 71983 0 2 0 syz-executor 39020 136553 71983 0 3 0x4000080 kqread syz-executor 39020 285756 71983 0 3 0x4000080 fsleep syz-executor 51116 33256 97022 0 3 0x80 nanoslp syz-executor 51116 43887 97022 0 2 0x4000000 syz-executor 51116 523447 97022 0 3 0x4000000 fltagain2 syz-executor 51116 501213 97022 0 3 0x4000080 fsleep syz-executor 20673 313892 23618 0 3 0x82 nanoslp syz-executor 91625 257628 0 0 3 0x14200 acct acct 71983 123201 23618 0 3 0x82 nanoslp syz-executor 29571 338410 23618 0 3 0x82 nanoslp syz-executor 97022 413528 23618 0 3 0x82 nanoslp syz-executor 19540 291894 23618 0 3 0x82 nanoslp syz-executor 35829 14322 23618 0 3 0x82 nanoslp syz-executor 45300 349685 23618 0 3 0x82 nanoslp syz-executor 56663 197328 23618 0 3 0x82 nanoslp syz-executor 23618 465801 87391 0 3 0x82 kqread syz-executor 87391 53007 21341 0 3 0x10008a sigsusp ksh 21341 174303 75624 0 3 0x98 kqread sshd-session 75624 438322 2522 0 3 0x92 kqread sshd-session 39743 481579 1 0 3 0x100083 ttyopn getty 2522 77283 1 0 3 0x88 kqread sshd 43576 258603 45848 74 3 0x1100092 bpf pflogd 45848 301608 1 0 3 0x80 sbwait pflogd 45640 413021 49288 73 3 0x1100090 kqread syslogd 49288 283960 1 0 3 0x100082 sbwait syslogd 20314 31065 1 0 3 0x100080 kqread resolvd 46429 148815 6697 77 3 0x100092 kqread dhcpleased 7407 120393 6697 77 3 0x100092 kqread dhcpleased 6697 504271 1 0 3 0x80 kqread dhcpleased 2175 459171 0 0 3 0x14200 bored smr 39203 394814 0 0 2 0x14200 zerothread 76388 147920 0 0 3 0x14200 aiodoned aiodoned 53241 252332 0 0 3 0x14200 syncer update 41711 440376 0 0 3 0x14200 cleaner cleaner 73142 479171 0 0 3 0x14200 reaper reaper 96234 74049 0 0 3 0x14200 pgdaemon pagedaemon 87453 14707 0 0 3 0x14200 bored viomb 54534 334841 0 0 3 0x40014200 acpi0 acpi0 9854 282437 0 0 3 0x40014200 idle1 38705 206966 0 0 3 0x14200 bored softnet1 42238 150948 0 0 3 0x14200 bored softnet0 73996 11355 0 0 3 0x14200 bored systqmp 89262 115423 0 0 3 0x14200 bored systq 22235 331641 0 0 3 0x14200 tmoslp softclockmp 34542 447029 0 0 3 0x40014200 tmoslp softclock 45424 2725 0 0 3 0x40014200 idle0 1 303729 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 90544 (syz-executor) thread 0xffff80002a2742b0 (85609) exclusive rwlock vcpu r = 0 (0xffff80003c4c3970) #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 14955 (syz-executor) thread 0xffff80003c492030 (214824) exclusive rwlock vmmaplk r = 0 (0xfffffd805dbea138) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 51116 (syz-executor) thread 0xffff80002a2754d8 (43887) exclusive rrwlock inode r = 0 (0xfffffd806e7bc248) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11101 12113K 13131K 166960K 13658 0 pcb 19 17K 19K 166960K 753 0 rtable 217 14K 15K 166960K 878 0 pf 45 20K 84K 166960K 243 0 ifaddr 36 6K 7K 166960K 160 0 ifgroup 60 2K 3K 166960K 258 0 sysctl 4 1K 9K 166960K 23 0 counters 72 37K 38K 166960K 424 0 ioctlops 0 0K 4K 166960K 1987 0 iov 0 0K 20K 166960K 136 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1483 93K 94K 166960K 3057 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 28 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 179 0 dirhash 12 2K 2K 166960K 57 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 2016 0 sigio 0 0K 0K 166960K 37 0 proc 73 115K 164K 166960K 840 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 280 0 in_multi 63 4K 7K 166960K 235 0 ether_multi 1 0K 0K 166960K 21 0 mrt 1 0K 0K 166960K 17 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 773 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 257 160K 178K 166960K 20466 0 UVM aobj 50 22K 22K 166960K 58 0 pinsyscall 43 86K 101K 166960K 3294 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 297 0 NDP 16 0K 2K 166960K 121 0 temp 112 8684K 8796K 166960K 106501 0 kqueue 15 22K 31K 166960K 436 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 120 291 0 288 2 1 1 2 0 8 0 rtentry 176 260 0 187 6 2 4 6 0 8 0 unpcb 144 1504 0 1486 16 14 2 6 0 8 1 syncache 336 13 0 13 4 3 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 3 0 3 3 3 0 1 0 8 0 tcpcb 736 617 0 609 9 2 7 7 0 8 5 arp 136 42 0 27 1 0 1 1 0 8 0 inpcb 328 2493 0 2478 28 21 7 9 0 8 5 nd6 152 45 0 31 1 0 1 1 0 8 0 pkpcb 40 20 0 20 6 5 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 160 0 160 4 3 1 1 0 8 1 pppxif 1504 4 0 4 3 3 0 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 19 0 3 1 0 1 1 0 482 0 pffrnode 88 18 0 3 1 0 1 1 0 8 0 pffrent 40 24 0 8 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 6 0 3 1 0 1 1 0 8 0 pfsrclim 320 33 0 33 1 1 0 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 3 1 0 1 1 0 8 0 pfstate 448 3 0 1 1 0 1 1 0 8 0 pfrule 1360 6 0 3 1 0 1 1 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 983 0 678 31 8 23 29 0 8 0 art_table 40 988 0 678 5 0 5 5 0 8 0 art_node 32 259 0 197 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 2 1 1 1 0 8 0 semapl 112 175 0 165 1 0 1 1 0 8 0 shmpl 112 40 0 2 2 0 2 2 0 8 0 dirhash 1024 48 0 31 3 0 3 3 0 8 0 dino2pl 256 5467 0 3956 96 0 96 96 0 8 0 ffsino 296 5467 0 3956 118 1 117 118 0 8 0 nchpl 144 8180 0 6468 64 0 64 64 0 8 0 rtmask 32 19 0 19 4 4 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 28842 0 28842 5 4 1 2 0 8 1 percpumem 16 227 0 176 1 0 1 1 0 8 0 vcpupl 3968 10 0 1 2 0 2 2 0 8 0 vmpool 848 14 0 5 3 2 1 2 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 186 0 156 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 10 0 10 4 4 0 1 0 8 0 scxspl 216 60139 0 60139 19 16 3 8 1 8 3 plimitpl 152 817 0 799 1 0 1 1 0 8 0 sigapl 424 2325 0 2276 9 3 6 9 0 8 0 knotepl 120 581 0 0 18 0 18 18 0 8 0 kqueuepl 224 781 0 770 8 4 4 5 0 8 3 pipepl 344 398 0 371 6 3 3 6 0 8 0 fdescpl 528 2282 0 2250 3 0 3 3 0 8 0 filepl 160 16045 0 15820 27 13 14 16 0 8 2 lockfpl 104 747 0 745 2 1 1 2 0 8 0 lockfspl 48 263 0 261 1 0 1 1 0 8 0 sessionpl 144 37 0 28 1 0 1 1 0 8 0 pgrppl 48 96 0 79 1 0 1 1 0 8 0 ucredpl 104 2971 0 2957 1 0 1 1 0 8 0 zombiepl 144 3290 0 3289 1 0 1 1 0 8 0 processpl 1232 2325 0 2276 6 2 4 6 0 8 0 procpl 664 5662 0 5602 8 2 6 8 0 8 0 sosppl 176 15 0 15 4 3 1 1 0 8 1 sockpl 752 4356 0 4320 48 37 11 17 0 8 6 mcl64k 65536 18 0 0 3 0 3 3 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 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 125 0 0 16 0 16 16 0 8 0 mcl2k 2048 37 0 0 4 0 4 4 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1707 0 0 105 0 105 105 0 8 0 bufpl 280 25852 0 19716 439 0 439 439 0 8 0 anonpl 32 11421 0 0 93 1 92 92 0 246 0 amapchunkpl 152 71213 0 70666 61 28 33 38 0 158 10 amappl16 200 8646 0 8603 90 74 16 25 0 8 8 amappl15 192 42 0 42 1 1 0 1 0 8 0 amappl14 184 7 0 6 1 0 1 1 0 8 0 amappl13 176 489 0 488 1 0 1 1 0 8 0 amappl12 168 2698 0 2655 3 1 2 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 51 0 35 1 0 1 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 30 0 28 1 0 1 1 0 8 0 amappl7 128 99 0 98 1 0 1 1 0 8 0 amappl6 120 347 0 333 1 0 1 1 0 8 0 amappl5 112 93 0 82 1 0 1 1 0 8 0 amappl4 104 474 0 443 1 0 1 1 0 8 0 amappl3 96 12377 0 12269 4 1 3 3 0 8 0 amappl2 88 2472 0 2390 2 0 2 2 0 8 0 amappl1 80 19720 0 19132 14 0 14 14 0 8 0 amappl 88 19268 0 19089 5 0 5 5 0 92 0 uvmvnodes 80 193 0 0 4 0 4 4 0 8 0 dma65536 65536 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 0 1 1 0 8 1 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 2 2 0 1 0 8 0 dma128 128 256 0 256 4 4 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 57 0 8 1 0 1 1 0 8 0 uaddrrnd 24 2282 0 2250 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2282 0 2250 1 0 1 1 0 8 0 vmmpekpl 168 20336 0 20272 4 0 4 4 0 8 0 vmmpepl 168 153470 0 151458 142 39 103 106 0 357 5 vmsppl 488 2281 0 2250 8 3 5 5 0 8 0 rwobjpl 80 43754 0 42547 38 6 32 33 0 8 0 pdppl 4096 4599 0 4519 123 41 82 83 0 8 2 pvpl 32 20095 0 0 162 0 162 162 0 265 0 pmappl 256 2295 0 2255 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 420 0 65 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(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: 0x75446f2dfa80, count: -3 ddb{0}> machine ddbcpu 1 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{1}> trace end trace frame: 0x0, count: -1