witness: lock order reversal: 1st 0xfffffd806bf4b2d8 vmmaplk (&map->lock) 2nd 0xfffffd806ddab1b8 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_readv+0xd8 sys/kern/sys_generic.c:199 #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(fffffd806ddab1b8,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806ddab1a8,1) at rw_enter+0x122 rrw_enter(fffffd806ddab1a8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806894f528,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806894f528,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806894f528,ffff800011a26440,3f,0,1,1dfc299ba2ff78e8,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd805f0a7140) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff81f882e0,2902,8000,ffffffff820e6e60,ffff800032598a60) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff800032598850) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e65feb8,ffff800032598a60,0,fffffd807f7d3750) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd8061f5adb8,ffff800032598a60,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff80002a03e020,3,ffff800032598a60,0,ffff800032598b20) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff80002a03e020,ffff800032598bd0,ffff800032598b20) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff800032598bd0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800032598bd0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x292e27f6990, count: -16 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff800032598310 rbx 0xfffffd80042cb250 rdx 0xffff8000012a2dc0 rcx 0xffff80002a03e020 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff8000325981f0 r9 0x8080808080808080 r10 0x60042bd8a59e2979 r11 0xabddd6a6f809273d r12 0 r13 0xfffffd8003ae3e00 r14 0x3 r15 0xffffffff rip 0xffffffff82b713d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800032598300 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=467698 pid=96917 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a03ea40,0xffffffff83631f90 process=0xffff8000fffed220 user=0xffff800032593000, vmspace=0xfffffd806bf4b1e0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96917 459187 81047 0 3 0x80 fsleep syz-executor *96917 467698 81047 0 7 0x4000000 syz-executor 55416 301250 74402 0 3 0x90 fsleep syz-executor 55416 91064 74402 0 2 0x4000010 syz-executor 3352 253243 20843 0 3 0x80 fsleep syz-executor 3352 219706 20843 0 3 0x4000080 lockf syz-executor 4208 107675 37856 0 3 0x80 fsleep syz-executor 4208 398725 37856 0 3 0x4000080 kqread syz-executor 4208 353982 37856 0 3 0x4000080 fsleep syz-executor 16591 352414 18694 0 3 0x80 fsleep syz-executor 16591 39459 18694 0 3 0x4000080 kqsel syz-executor 98855 179562 38499 0 3 0x80 fsleep syz-executor 98855 202942 38499 0 3 0x4000080 netcon syz-executor 75227 381005 98983 0 3 0x80 fsleep syz-executor 75227 103324 98983 0 3 0x4000080 lockf syz-executor 37805 172195 89696 0 3 0x80 fsleep syz-executor 37805 421618 89696 0 3 0x4000080 ttyout syz-executor 10665 149550 1 0 3 0x80 nanoslp init 41575 119655 0 0 3 0x14200 acct acct 22976 340498 0 0 3 0x14280 nfsidl nfsio 15215 130219 0 0 3 0x14280 nfsidl nfsio 95354 45305 0 0 3 0x14280 nfsidl nfsio 80872 464094 0 0 3 0x14280 nfsidl nfsio 45940 3182 0 0 3 0x14280 nfsidl nfsio 3554 49554 0 0 3 0x14280 nfsidl nfsio 10669 419744 0 0 3 0x14280 nfsidl nfsio 45545 26617 0 0 3 0x14280 nfsidl nfsio 90940 514947 0 0 3 0x14280 nfsidl nfsio 59063 72915 0 0 3 0x14280 nfsidl nfsio 61409 445142 0 0 3 0x14280 nfsidl nfsio 320 508213 0 0 3 0x14280 nfsidl nfsio 92580 503453 0 0 3 0x14280 nfsidl nfsio 63231 452626 0 0 3 0x14280 nfsidl nfsio 29609 214852 0 0 3 0x14280 nfsidl nfsio 46066 313716 0 0 3 0x14280 nfsidl nfsio 26757 166131 0 0 3 0x14280 nfsidl nfsio 26900 466553 0 0 3 0x14280 nfsidl nfsio 95483 56481 0 0 3 0x14280 nfsidl nfsio 87170 270448 0 0 3 0x14280 nfsidl nfsio 34277 146842 0 0 3 0x14200 bored sosplice 38499 349233 9778 0 3 0x82 nanoslp syz-executor 74402 191091 9778 0 3 0x82 nanoslp syz-executor 18694 237977 9778 0 3 0x82 nanoslp syz-executor 20843 496718 9778 0 3 0x82 nanoslp syz-executor 81047 441733 9778 0 3 0x82 nanoslp syz-executor 89696 92394 9778 0 3 0x82 nanoslp syz-executor 37856 82171 9778 0 3 0x82 nanoslp syz-executor 98983 26447 9778 0 3 0x82 nanoslp syz-executor 9778 374847 55619 0 3 0x82 kqread syz-executor 55619 300484 33259 0 3 0x10008a sigsusp ksh 33259 498563 6096 0 3 0x98 kqread sshd-session 6096 381691 86504 0 3 0x92 kqread sshd-session 86504 358336 1 0 3 0x88 kqread sshd 17816 349 54651 74 3 0x1100092 bpf pflogd 54651 522970 1 0 3 0x80 sbwait pflogd 93510 186619 43160 73 3 0x1100090 kqread syslogd 43160 81120 1 0 3 0x100082 sbwait syslogd 30870 123671 1 0 3 0x100080 kqread resolvd 57598 159309 4477 77 3 0x100092 kqread dhcpleased 20394 425723 4477 77 3 0x100092 kqread dhcpleased 4477 426858 1 0 3 0x80 kqread dhcpleased 71448 25336 0 0 3 0x14200 bored smr 284 156306 0 0 3 0x14200 pgzero zerothread 59455 322321 0 0 3 0x14200 aiodoned aiodoned 50628 65796 0 0 3 0x14200 syncer update 32103 184298 0 0 3 0x14200 cleaner cleaner 84796 465744 0 0 3 0x14200 reaper reaper 2358 22773 0 0 3 0x14200 pgdaemon pagedaemon 57750 31691 0 0 3 0x14200 bored viomb 88210 192711 0 0 3 0x40014200 acpi0 acpi0 8704 204999 0 0 7 0x40014200 idle1 3481 329435 0 0 3 0x14200 bored softnet3 56042 454136 0 0 3 0x14200 bored softnet2 74024 48578 0 0 3 0x14200 bored softnet1 47037 226455 0 0 2 0x14200 softnet0 58201 425225 0 0 3 0x14200 bored systqmp 38412 261531 0 0 3 0x14200 bored systq 9794 291318 0 0 3 0x14200 tmoslp softclockmp 52949 389970 0 0 3 0x40014200 tmoslp softclock 4618 98330 0 0 3 0x40014200 idle0 1 449929 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 96917 (syz-executor) thread 0xffff80002a03e020 (467698) shared rwlock vmmaplk r = 0 (0xfffffd806bf4b2d8) #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_readv+0xd8 sys/kern/sys_generic.c:199 #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 (0xffffffff8363b4e8) #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_readv+0xd8 sys/kern/sys_generic.c:199 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10255 11347K 12390K 166960K 15112 0 pcb 17 16K 18K 166960K 416 0 rtable 161 5K 8K 166960K 619 0 pf 44 19K 23K 166960K 139 0 ifaddr 37 6K 8K 166960K 101 0 ifgroup 60 2K 2K 166960K 142 0 sysctl 4 1K 1K 166960K 7 0 counters 66 36K 37K 166960K 128 0 ioctlops 0 0K 4K 166960K 1700 0 iov 0 0K 20K 166960K 243 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1538 97K 97K 166960K 3824 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 42 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 229 0 dirhash 12 2K 3K 166960K 87 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 85K 166960K 2553 0 sigio 0 0K 0K 166960K 59 0 proc 64 79K 128K 166960K 773 0 subproc 104 6K 6K 166960K 105 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 443 0 in_multi 56 4K 7K 166960K 237 0 ether_multi 1 0K 0K 166960K 27 0 mrt 2 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 277 1235K 1235K 166960K 277 0 exec 0 0K 1K 166960K 721 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 73K 91K 166960K 25932 0 UVM aobj 109 7K 7K 166960K 113 0 pinsyscall 42 84K 100K 166960K 3701 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 187 0 NDP 13 0K 1K 166960K 71 0 temp 78 6828K 6955K 166960K 102706 0 kqueue 17 24K 28K 166960K 423 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 120 184 0 181 1 0 1 1 0 8 0 rtentry 112 195 0 126 4 0 4 4 0 8 0 unpcb 144 1786 0 1767 17 13 4 6 0 8 3 syncache 336 12 0 12 5 5 0 1 0 8 0 tcpqe 32 5 0 5 4 4 0 1 0 8 0 tcpcb 808 844 0 837 24 22 2 8 0 8 1 arp 120 35 0 16 1 0 1 1 0 8 0 inpcb 336 2996 0 2985 37 30 7 10 0 8 5 nd6 136 36 0 23 1 0 1 1 0 8 0 pkpcb 40 18 0 18 6 5 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 23 0 23 5 4 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 9 0 3 1 0 1 1 0 482 0 pffrnode 88 7 0 1 1 0 1 1 0 8 0 pffrent 40 20 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 pfstitem 24 217 0 85 1 0 1 1 0 8 0 pfstkey 128 224 0 93 5 0 5 5 0 8 0 pfstate 376 217 0 88 14 0 14 14 0 8 0 pfrule 1344 28 0 20 2 1 1 2 0 8 0 art_heap8 4096 9 0 6 6 2 4 4 0 8 1 art_heap4 256 922 0 612 33 8 25 30 0 8 0 art_table 32 931 0 618 4 0 4 4 0 8 0 art_node 16 187 0 127 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 225 0 215 1 0 1 1 0 8 0 shmpl 112 110 0 4 4 0 4 4 0 8 0 dirhash 1024 68 0 51 3 0 3 3 0 8 0 dino2pl 256 6213 0 4716 95 0 95 95 0 8 0 ffsino 272 6213 0 4716 101 0 101 101 0 8 0 nchpl 144 9744 0 8057 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 34320 0 34320 6 5 1 3 0 8 1 percpumem 16 78 0 31 1 0 1 1 0 8 0 kstatmem 264 88 0 62 5 3 2 3 0 8 0 scsiplug 72 16 0 16 5 4 1 1 0 8 1 scxspl 216 27453 0 27453 16 15 1 8 1 8 1 plimitpl 152 629 0 612 1 0 1 1 0 8 0 sigapl 424 2896 0 2824 10 1 9 9 0 8 0 futexpl 64 37836 0 37827 1 0 1 1 0 8 0 knotepl 120 614 0 0 18 0 18 18 0 8 0 kqueuepl 216 729 0 714 5 4 1 3 0 8 0 pipepl 320 624 0 597 18 10 8 8 0 8 5 fdescpl 496 2853 0 2821 6 1 5 5 0 8 0 filepl 152 20175 0 19905 35 18 17 18 0 8 6 lockfpl 104 1269 0 1261 3 2 1 2 0 8 0 lockfspl 48 429 0 423 1 0 1 1 0 8 0 sessionpl 144 32 0 24 1 0 1 1 0 8 0 pgrppl 48 73 0 57 1 0 1 1 0 8 0 ucredpl 104 3736 0 3719 2 1 1 2 0 8 0 zombiepl 144 2953 0 2953 1 0 1 1 0 8 1 processpl 1160 2896 0 2824 6 0 6 6 0 8 0 procpl 648 7043 0 6962 8 0 8 8 0 8 0 srpgc 96 13 0 13 4 4 0 1 0 8 0 sosppl 168 22 0 22 4 4 0 1 0 8 0 sockpl 664 5055 0 5022 53 39 14 15 0 8 9 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 134 0 0 17 0 17 17 0 8 0 mcl2k 2048 33 0 0 4 0 4 4 0 8 0 mtagpl 96 62 0 0 2 0 2 2 0 8 0 mbufpl 256 282 0 0 16 0 16 16 0 8 0 bufpl 280 6821 0 646 442 0 442 442 0 8 0 anonpl 24 430918 0 425654 131 76 55 57 0 185 19 amapchunkpl 152 85545 0 84948 56 27 29 33 0 158 4 amappl16 200 10717 0 10657 82 72 10 16 0 8 6 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 146 0 135 1 0 1 1 0 8 0 amappl13 176 18 0 17 1 0 1 1 0 8 0 amappl12 168 3527 0 3496 4 1 3 3 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 19 0 19 2 2 0 1 0 8 0 amappl9 144 158 0 158 2 2 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 126 0 115 1 0 1 1 0 8 0 amappl6 120 176 0 174 1 0 1 1 0 8 0 amappl5 112 147 0 133 1 0 1 1 0 8 0 amappl4 104 363 0 343 1 0 1 1 0 8 0 amappl3 96 15703 0 15603 3 0 3 3 0 8 0 amappl2 88 3225 0 3140 3 0 3 3 0 8 0 amappl1 80 16988 0 16444 14 0 14 14 0 8 0 amappl 88 25308 0 25123 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 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 128 258 0 258 5 4 1 1 0 8 1 dma64 64 39 0 39 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 112 0 4 2 0 2 2 0 8 0 uaddrrnd 24 2853 0 2821 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2853 0 2821 1 0 1 1 0 8 0 vmmpekpl 168 24524 0 24483 3 0 3 3 0 8 0 vmmpepl 168 180402 0 178476 133 40 93 97 0 357 4 vmsppl 448 2852 0 2821 6 2 4 5 0 8 0 rwobjpl 56 54212 0 47239 106 6 100 102 0 8 1 pdppl 4096 5713 0 5642 117 46 71 81 0 8 0 pvpl 32 16281 0 0 132 1 131 131 0 265 0 pmappl 248 2852 0 2821 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 485 0 129 11 0 11 11 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(fffffd806ddab1b8,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806ddab1a8,1) at rw_enter+0x122 rrw_enter(fffffd806ddab1a8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806894f528,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806894f528,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806894f528,ffff800011a26440,3f,0,1,1dfc299ba2ff78e8,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd805f0a7140) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff81f882e0,2902,8000,ffffffff820e6e60,ffff800032598a60) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff800032598850) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e65feb8,ffff800032598a60,0,fffffd807f7d3750) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd8061f5adb8,ffff800032598a60,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff80002a03e020,3,ffff800032598a60,0,ffff800032598b20) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff80002a03e020,ffff800032598bd0,ffff800032598b20) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff800032598bd0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800032598bd0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x292e27f6990, 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