witness: lock order reversal: 1st 0xfffffd806bde3120 vmmaplk (&map->lock) 2nd 0xfffffd806ddf2c50 inode (&ip->i_lock) lock order [1] vmmaplk (&map->lock) -> [2] inode (&ip->i_lock) #0 rw_enter+0x122 #1 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #2 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #3 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #4 vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 #5 vndstrategy+0x4ff sys/dev/vnd.c:342 #6 physio+0x2f6 sys/kern/kern_physio.c:162 #7 spec_read+0x155 sys/kern/spec_vnops.c:215 #8 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #9 vn_read+0x17b sys/kern/vfs_vnops.c:369 #10 dofilereadv+0x230 sys/kern/sys_generic.c:252 #11 sys_read+0xa2 sys/kern/sys_generic.c:172 #12 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #12 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 lock order [2] inode (&ip->i_lock) -> [1] vmmaplk (&map->lock) #0 rw_enter_read+0xab sys/kern/kern_rwlock.c:112 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1819 #2 uvm_fault_check+0x49 sys/uvm/uvm_fault.c:672 #3 uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 #4 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #5 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x57 #8 ffs_read+0x422 sys/ufs/ffs/ffs_vnops.c:254 #9 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #10 vn_rdwr+0x15b #11 vmcmd_map_readvn+0x142 sys/kern/exec_subr.c:249 #12 exec_process_vmcmds+0xfb sys/kern/exec_subr.c:139 #13 sys_execve+0xbe4 sys/kern/kern_exec.c:468 #14 start_init+0x3c6 sys/kern/init_main.c:714 #15 proc_trampoline+0x10 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806ddf2c50,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806ddf2c40,1) at rw_enter+0x122 rrw_enter(fffffd806ddf2c40,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805ff8ca50,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805ff8ca50,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd805ff8ca50,ffff800011a26140,df,0,1,4c84dc5ea06839a5,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd80602aa380) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff82b2d360,2902,8000,ffffffff82abc400,ffff80003728a8e8) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80003728a750) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806deebde0,ffff80003728a8e8,0,fffffd807f7d35b0) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd8067073010,ffff80003728a8e8,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff800032387478,3,ffff80003728a8e8,0,ffff80003728a9a0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_read(ffff800032387478,ffff80003728aa50,ffff80003728a9a0) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80003728aa50) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80003728aa50) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd242af6b6e0, count: -16 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff80003728a210 rbx 0xfffffd80042cb460 rdx 0xffff80000128f5c0 rcx 0xffff800032387478 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff80003728a0f0 r9 0x8080808080808080 r10 0x1540f554b5b22b87 r11 0x6ffd82727f2fc1c1 r12 0 r13 0xfffffd8003ae2e00 r14 0x3 r15 0xffffffff rip 0xffffffff81e356c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003728a200 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=272870 pid=6481 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800032387700,0xffffffff835851b8 process=0xffff8000fffecdb8 user=0xffff800037285000, vmspace=0xfffffd806bde3028 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 6481 447050 82644 60928 2 0x10 syz-executor * 6481 272870 82644 60928 7 0x4000010 syz-executor 8277 470378 98608 0 2 0x10 syz-executor 8277 129349 98608 0 2 0x4000010 syz-executor 72936 98363 67747 0 2 0x480 syz-executor 72936 487640 67747 0 3 0x4000080 netcon syz-executor 72936 122293 67747 0 3 0x4000080 fsleep syz-executor 36504 441844 77347 0 2 0 syz-executor 36504 504954 77347 0 3 0x4000080 sbwait syz-executor 36504 301604 77347 0 3 0x4000080 fsleep syz-executor 45805 524247 1 0 3 0x82 nanoslp getty 63669 224490 0 0 3 0x14200 acct acct 67709 201385 8431 0 3 0x82 wait syz-executor 77347 495316 8431 0 3 0x82 nanoslp syz-executor 82225 181469 0 0 3 0x14200 bored sosplice 69599 445706 8431 0 2 0x482 syz-executor 67747 126297 8431 0 3 0x82 nanoslp syz-executor 89432 519997 8431 0 2 0x2 syz-executor 98608 139190 8431 0 3 0x82 nanoslp syz-executor 82644 158814 8431 0 3 0x82 nanoslp syz-executor 98436 352616 8431 0 2 0x482 syz-executor 8431 144683 99717 0 2 0x2 syz-executor 99717 46821 14499 0 3 0x10008a sigsusp ksh 14499 443601 16326 0 3 0x98 kqread sshd-session 16326 68874 5547 0 3 0x92 kqread sshd-session 5547 20708 1 0 3 0x88 kqread sshd 79150 105114 99053 74 3 0x1100092 bpf pflogd 99053 5839 1 0 3 0x80 sbwait pflogd 68426 202593 16823 73 3 0x1100090 kqread syslogd 16823 312386 1 0 3 0x100082 sbwait syslogd 80563 162930 1 0 3 0x100080 kqread resolvd 89359 147762 10553 77 3 0x100092 kqread dhcpleased 14789 299088 10553 77 3 0x100092 kqread dhcpleased 10553 198574 1 0 3 0x80 kqread dhcpleased 37576 445743 0 0 3 0x14200 bored smr 86786 112468 0 0 2 0x14200 zerothread 67909 451047 0 0 3 0x14200 aiodoned aiodoned 53905 219526 0 0 3 0x14200 syncer update 66478 266781 0 0 3 0x14200 cleaner cleaner 12369 390177 0 0 3 0x14200 reaper reaper 24917 126112 0 0 3 0x14200 pgdaemon pagedaemon 92491 211336 0 0 3 0x14200 bored viomb 44640 201833 0 0 3 0x40014200 acpi0 acpi0 12828 470584 0 0 7 0x40014200 idle1 98041 297804 0 0 3 0x14200 bored softnet3 7493 412274 0 0 3 0x14200 bored softnet2 88575 43779 0 0 3 0x14200 bored softnet1 40053 172352 0 0 3 0x14200 bored softnet0 81292 418733 0 0 3 0x14200 bored systqmp 88004 398793 0 0 3 0x14200 bored systq 25100 169915 0 0 3 0x14200 tmoslp softclockmp 75926 240853 0 0 2 0x40014200 softclock 21179 128134 0 0 3 0x40014200 idle0 1 76234 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 6481 (syz-executor) thread 0xffff800032387478 (272870) shared rwlock vmmaplk r = 0 (0xfffffd806bde3120) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:172 #2 physio+0x277 sys/kern/kern_physio.c:139 #3 spec_read+0x155 sys/kern/spec_vnops.c:215 #4 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #5 vn_read+0x17b sys/kern/vfs_vnops.c:369 #6 dofilereadv+0x230 sys/kern/sys_generic.c:252 #7 sys_read+0xa2 sys/kern/sys_generic.c:172 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8363bb40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vn_read+0x56 sys/kern/vfs_vnops.c:351 #2 dofilereadv+0x230 sys/kern/sys_generic.c:252 #3 sys_read+0xa2 sys/kern/sys_generic.c:172 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 89432 (syz-executor) thread 0xffff8000ffff6cc8 (519997) exclusive rrwlock inode r = 0 (0xfffffd806de4e808) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c49f2b8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10251 11211K 11603K 166960K 13294 0 pcb 19 14K 16K 166960K 424 0 rtable 216 7K 8K 166960K 536 0 pf 37 18K 274K 166960K 195 0 ifaddr 43 7K 8K 166960K 92 0 ifgroup 59 2K 2K 166960K 152 0 sysctl 4 1K 2K 166960K 7 0 counters 66 36K 37K 166960K 120 0 ioctlops 0 0K 4K 166960K 1646 0 iov 0 0K 32K 166960K 85 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1455 91K 92K 166960K 2546 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 113 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 97K 166960K 1594 0 sigio 0 0K 0K 166960K 100 0 proc 75 103K 140K 166960K 710 0 subproc 104 6K 6K 166960K 132 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 344 0 in_multi 88 6K 7K 166960K 182 0 ether_multi 1 0K 0K 166960K 14 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 693 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 249 73K 87K 166960K 16762 0 UVM aobj 112 3K 3K 166960K 117 0 pinsyscall 42 84K 105K 166960K 2804 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 107 0 NDP 13 0K 2K 166960K 64 0 temp 75 6828K 7077K 166960K 51497 0 kqueue 14 22K 30K 166960K 243 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 218 0 215 4 3 1 3 0 8 0 rtentry 112 164 0 66 4 0 4 4 0 8 0 unpcb 144 1227 0 1206 15 13 2 6 0 8 1 syncache 336 20 0 20 3 2 1 1 0 8 1 tcpqe 32 4 0 4 2 2 0 1 0 8 0 tcpcb 808 528 0 520 14 9 5 8 0 8 4 arp 120 27 0 10 1 0 1 1 0 8 0 inpcb 336 2338 0 2319 24 16 8 8 0 8 6 nd6 136 37 0 12 1 0 1 1 0 8 0 pkpcb 40 43 0 43 3 2 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1168 13 0 13 3 2 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 8 0 1 1 0 1 1 0 482 0 pffrnode 88 8 0 1 1 0 1 1 0 8 0 pffrent 40 20 0 12 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 pfanchor 1288 4 0 4 1 1 0 1 0 8 0 pfstitem 24 122 0 31 1 0 1 1 0 8 0 pfstkey 128 122 0 31 3 0 3 3 0 8 0 pfstate 376 121 0 31 9 0 9 9 0 8 0 pfrule 1344 29 0 23 2 0 2 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 665 0 244 30 3 27 29 0 8 0 art_table 32 668 0 244 4 0 4 4 0 8 0 art_node 16 162 0 76 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 11 2 1 1 1 0 8 0 semapl 112 109 0 99 1 0 1 1 0 8 0 shmpl 112 114 0 5 4 0 4 4 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 4172 0 2672 95 0 95 95 0 8 0 ffsino 272 4172 0 2672 101 0 101 101 0 8 0 nchpl 144 6501 0 5886 63 39 24 63 0 8 0 uvmvnodes 80 5039 0 0 103 0 103 103 0 8 0 vnodes 216 5039 0 0 280 0 280 280 0 8 0 namei 1024 22897 0 22896 4 3 1 2 0 8 0 percpumem 16 74 0 27 1 0 1 1 0 8 0 kstatmem 264 80 0 54 3 0 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 3 0 3 3 3 0 1 0 8 0 scxspl 216 23676 0 23676 13 11 2 8 1 8 2 plimitpl 152 481 0 462 1 0 1 1 0 8 0 sigapl 424 1930 0 1879 11 4 7 9 0 8 0 futexpl 64 22727 0 22725 1 0 1 1 0 8 0 knotepl 120 496 0 0 15 0 15 15 0 8 0 kqueuepl 216 419 0 409 4 3 1 3 0 8 0 pipepl 320 375 0 348 7 2 5 5 0 8 2 fdescpl 496 1888 0 1857 6 1 5 6 0 8 0 filepl 152 12978 0 12711 32 18 14 17 0 8 1 lockfpl 104 1136 0 1134 4 3 1 4 0 8 0 lockfspl 48 257 0 255 1 0 1 1 0 8 0 sessionpl 144 41 0 33 1 0 1 1 0 8 0 pgrppl 48 61 0 45 1 0 1 1 0 8 0 ucredpl 104 1834 0 1818 1 0 1 1 0 8 0 zombiepl 144 2106 0 2103 2 1 1 1 0 8 0 processpl 1160 1930 0 1879 7 2 5 6 0 8 0 procpl 648 4393 0 4336 9 3 6 8 0 8 0 srpgc 96 8 0 8 3 3 0 1 0 8 0 sosppl 168 18 0 18 3 2 1 1 0 8 1 sockpl 664 3852 0 3809 41 32 9 18 0 8 4 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 14 0 0 2 0 2 2 0 8 0 mcl4k 4096 160 0 0 20 0 20 20 0 8 0 mcl2k 2048 40 0 0 5 0 5 5 0 8 0 mtagpl 96 53 0 0 2 0 2 2 0 8 0 mbufpl 256 1261 0 0 78 0 78 78 0 8 0 bufpl 280 7692 0 1517 442 0 442 442 0 8 0 anonpl 24 302962 0 298670 80 26 54 62 0 185 14 amapchunkpl 152 54971 0 54411 43 15 28 33 0 158 4 amappl16 200 7063 0 7034 43 28 15 15 0 8 11 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 152 0 140 1 0 1 1 0 8 0 amappl13 176 10 0 10 2 2 0 1 0 8 0 amappl12 168 2583 0 2552 4 1 3 3 0 8 0 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 11 0 10 1 0 1 1 0 8 0 amappl9 144 143 0 143 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 128 0 114 1 0 1 1 0 8 0 amappl6 120 184 0 182 1 0 1 1 0 8 0 amappl5 112 160 0 148 1 0 1 1 0 8 0 amappl4 104 388 0 367 1 0 1 1 0 8 0 amappl3 96 10172 0 10067 4 0 4 4 0 8 0 amappl2 88 2351 0 2264 3 0 3 3 0 8 0 amappl1 80 16208 0 15636 18 1 17 17 0 8 1 amappl 88 16135 0 15949 5 0 5 5 0 92 0 dma65536 65536 65 0 65 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 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 dma256 256 48 0 48 2 2 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 72 116 0 5 3 0 3 3 0 8 0 uaddrrnd 24 1888 0 1857 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1888 0 1857 1 0 1 1 0 8 0 vmmpekpl 168 17507 0 17459 3 0 3 3 0 8 0 vmmpepl 168 125909 0 124008 115 13 102 102 0 357 9 vmsppl 448 1887 0 1857 6 2 4 5 0 8 0 rwobjpl 56 41958 0 35844 89 0 89 89 0 8 2 pdppl 4096 3783 0 3714 121 48 73 87 0 8 4 pvpl 32 26656 0 0 216 1 215 215 0 265 0 pmappl 248 1887 0 1857 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 522 0 91 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806ddf2c50,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806ddf2c40,1) at rw_enter+0x122 rrw_enter(fffffd806ddf2c40,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805ff8ca50,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805ff8ca50,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd805ff8ca50,ffff800011a26140,df,0,1,4c84dc5ea06839a5,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd80602aa380) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff82b2d360,2902,8000,ffffffff82abc400,ffff80003728a8e8) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80003728a750) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806deebde0,ffff80003728a8e8,0,fffffd807f7d35b0) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd8067073010,ffff80003728a8e8,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff800032387478,3,ffff80003728a8e8,0,ffff80003728a9a0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_read(ffff800032387478,ffff80003728aa50,ffff80003728a9a0) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80003728aa50) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80003728aa50) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd242af6b6e0, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029b7bff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029b7bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5