witness: lock order reversal: 1st 0xfffffd8068de6d58 vmmaplk (&map->lock) 2nd 0xfffffd806d34e2c0 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(fffffd806d34e2c0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806d34e2b0,1) at rw_enter+0x122 rrw_enter(fffffd806d34e2b0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805f5a4b40,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f5a4b40,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd805f5a4b40,ffff800011a26d00,7,0,1,494e4644c17a302f,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd806257c348) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff81a98990,2902,8000,ffffffff81fe1a60,ffff800037216bf0) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000372169e0) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e61bc30,ffff800037216bf0,0,fffffd807f7d3410) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd8068c30150,ffff800037216bf0,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000ffff22a8,5,ffff800037216bf0,0,ffff800037216cb0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000ffff22a8,ffff800037216d60,ffff800037216cb0) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff800037216d60) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800037216d60) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeb8aca53200, count: -16 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff8000372164a0 rbx 0xfffffd80042c64e8 rdx 0xffff8000012a2cc0 rcx 0xffff8000ffff22a8 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff800037216380 r9 0x8080808080808080 r10 0x5a8d042fa0821bb9 r11 0x7508a05a534d81e r12 0 r13 0xfffffd8003adde00 r14 0x3 r15 0xffffffff rip 0xffffffff8221d4b5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037216490 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=206963 pid=38306 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff3970,0xffff800035b951f0 process=0xffff8000ffff7b00 user=0xffff800037211000, vmspace=0xfffffd8068de6c60 estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97726 383486 29084 0 2 0 syz-executor 97726 213877 29084 0 3 0x4000080 fsleep syz-executor 38306 173511 32796 0 2 0 syz-executor *38306 206963 32796 0 7 0x4000000 syz-executor 55208 61818 72408 0 2 0 syz-executor 55208 523794 72408 0 3 0x4000080 fsleep syz-executor 16710 451947 19055 -1 3 0x90 nanoslp syz-executor 16710 51610 19055 -1 3 0x4000090 kqsel syz-executor 16710 259405 19055 -1 3 0x4000090 fsleep syz-executor 32796 194026 36228 0 2 0x482 syz-executor 11024 481238 36228 0 3 0x82 nanoslp syz-executor 36034 516126 1 0 3 0x80 nanoslp init 60535 141788 0 0 3 0x14200 acct acct 95858 203224 0 0 3 0x14200 bored sosplice 19055 218009 36228 0 2 0x482 syz-executor 80737 95595 36228 0 3 0x82 nanoslp syz-executor 18465 121552 36228 0 2 0x2 syz-executor 72408 436004 36228 0 2 0x482 syz-executor 22578 229039 36228 0 3 0x82 nanoslp syz-executor 29084 96138 36228 0 2 0x482 syz-executor 36228 371466 44343 0 3 0x82 kqread syz-executor 44343 132760 32055 0 3 0x10008a sigsusp ksh 32055 465481 87323 0 3 0x98 kqread sshd-session 87323 393069 34039 0 3 0x92 kqread sshd-session 34039 400987 1 0 3 0x88 kqread sshd 20164 380814 48500 74 3 0x1100092 bpf pflogd 48500 8224 1 0 3 0x80 sbwait pflogd 13527 392765 1957 73 3 0x1100090 kqread syslogd 1957 328197 1 0 3 0x100082 sbwait syslogd 85163 238082 1 0 3 0x100080 kqread resolvd 94622 410592 192 77 3 0x100092 kqread dhcpleased 11516 89183 192 77 3 0x100092 kqread dhcpleased 192 326344 1 0 3 0x80 kqread dhcpleased 64796 473254 0 0 3 0x14200 bored smr 59424 400267 0 0 2 0x14200 zerothread 36100 384103 0 0 3 0x14200 aiodoned aiodoned 82416 502525 0 0 3 0x14200 syncer update 54715 171463 0 0 3 0x14200 cleaner cleaner 1847 490741 0 0 3 0x14200 reaper reaper 99567 466332 0 0 3 0x14200 pgdaemon pagedaemon 65374 26127 0 0 3 0x14200 bored viomb 78654 594 0 0 3 0x40014200 acpi0 acpi0 64088 268193 0 0 7 0x40014200 idle1 34163 45667 0 0 3 0x14200 bored softnet3 64776 348378 0 0 3 0x14200 bored softnet2 49232 461013 0 0 3 0x14200 bored softnet1 37209 216972 0 0 3 0x14200 bored softnet0 95901 513541 0 0 3 0x14200 bored systqmp 79568 279117 0 0 3 0x14200 bored systq 99544 426444 0 0 3 0x14200 tmoslp softclockmp 6614 371010 0 0 2 0x40014200 softclock 30389 98605 0 0 3 0x40014200 idle0 1 505180 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 38306 (syz-executor) thread 0xffff8000ffff22a8 (206963) shared rwlock vmmaplk r = 0 (0xfffffd8068de6d58) #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 (0xffffffff83622cc8) #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 Process 18465 (syz-executor) thread 0xffff80002a03f968 (121552) exclusive rrwlock inode r = 0 (0xfffffd80787753c8) #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 vget+0x2bd sys/kern/vfs_subr.c:678 #6 ufs_ihashget+0x192 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c5e4c48) #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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #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 10226 11131K 11559K 166960K 13873 0 pcb 18 15K 17K 166960K 421 0 rtable 158 5K 7K 166960K 597 0 pf 36 17K 273K 166960K 104 0 ifaddr 35 5K 8K 166960K 87 0 ifgroup 59 2K 2K 166960K 123 0 sysctl 3 0K 1K 166960K 6 0 counters 66 36K 36K 166960K 108 0 ioctlops 0 0K 4K 166960K 1794 0 iov 0 0K 24K 166960K 245 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1488 94K 94K 166960K 3080 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 10K 14K 166960K 30 0 VM map 2 1K 1K 166960K 2 0 sem 20 11K 11K 166960K 175 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 93K 166960K 1488 0 sigio 0 0K 0K 166960K 85 0 proc 63 79K 152K 166960K 738 0 subproc 104 6K 6K 166960K 135 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 355 0 in_multi 68 5K 7K 166960K 196 0 ether_multi 1 0K 0K 166960K 17 0 mrt 3 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 858 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 243 74K 87K 166960K 15065 0 UVM aobj 78 5K 5K 166960K 88 0 pinsyscall 41 82K 106K 166960K 2619 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 72 0 NDP 13 0K 2K 166960K 59 0 temp 76 6828K 7076K 166960K 70782 0 kqueue 13 20K 26K 166960K 236 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 120 250 0 247 5 3 2 3 0 8 1 rtentry 112 179 0 110 4 0 4 4 0 8 0 unpcb 144 1398 0 1375 11 7 4 6 0 8 3 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 808 637 0 632 15 13 2 8 0 8 1 arp 120 36 0 16 1 0 1 1 0 8 0 ipq 40 4 0 2 2 1 1 1 0 8 0 ipqe 40 7 0 5 2 1 1 1 0 8 0 inpcb 336 2022 0 2010 17 10 7 9 0 8 5 nd6 136 37 0 23 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1168 12 0 12 2 1 1 1 0 8 1 pffrent 40 1 0 1 1 1 0 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 62 0 32 1 0 1 1 0 8 0 pfstkey 128 62 0 32 2 0 2 2 0 8 0 pfstate 376 62 0 32 6 0 6 6 0 8 0 pfrule 1344 25 0 19 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 782 0 400 33 9 24 30 0 8 0 art_table 32 784 0 400 4 0 4 4 0 8 0 art_node 16 176 0 114 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 5 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 168 0 150 1 0 1 1 0 8 0 shmpl 112 85 0 10 3 0 3 3 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 4264 0 2764 95 0 95 95 0 8 0 ffsino 272 4264 0 2764 102 0 102 102 0 8 0 nchpl 144 6413 0 4729 63 0 63 63 0 8 0 uvmvnodes 80 5420 0 0 111 0 111 111 0 8 0 vnodes 216 5420 0 0 302 0 302 302 0 8 0 namei 1024 24642 0 24642 4 3 1 2 0 8 1 percpumem 16 68 0 21 1 0 1 1 0 8 0 kstatmem 264 68 0 42 2 0 2 2 0 8 0 scsiplug 72 8 0 8 3 2 1 1 0 8 1 scxspl 216 18378 0 18378 11 8 3 8 1 8 3 plimitpl 152 336 0 319 1 0 1 1 0 8 0 sigapl 424 1787 0 1736 7 1 6 7 0 8 0 futexpl 64 22342 0 22339 1 0 1 1 0 8 0 knotepl 120 550 0 0 17 0 17 17 0 8 0 kqueuepl 216 491 0 481 5 0 5 5 0 8 4 pipepl 320 323 0 296 8 5 3 8 0 8 0 fdescpl 496 1767 0 1736 6 1 5 5 0 8 0 filepl 152 13383 0 13127 23 10 13 19 0 8 0 lockfpl 104 539 0 536 1 0 1 1 0 8 0 lockfspl 48 239 0 236 1 0 1 1 0 8 0 sessionpl 144 26 0 18 1 0 1 1 0 8 0 pgrppl 48 50 0 33 1 0 1 1 0 8 0 ucredpl 104 2491 0 2475 1 0 1 1 0 8 0 zombiepl 144 1739 0 1736 1 0 1 1 0 8 0 processpl 1160 1787 0 1736 5 1 4 5 0 8 0 procpl 648 3760 0 3704 6 0 6 6 0 8 0 srpgc 96 8 0 8 1 1 0 1 0 8 0 sosppl 168 9 0 9 4 3 1 1 0 8 1 sockpl 664 3762 0 3725 41 31 10 22 0 8 6 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 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 131 0 0 17 0 17 17 0 8 1 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 62 0 0 2 0 2 2 0 8 0 mbufpl 256 246 0 0 16 0 16 16 0 8 0 bufpl 280 6046 0 115 424 0 424 424 0 8 0 anonpl 24 282537 0 273477 103 22 81 81 0 185 1 amapchunkpl 152 48976 0 48336 35 5 30 31 0 158 3 amappl16 200 7259 0 6997 60 33 27 27 0 8 4 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 120 0 108 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 2441 0 2411 4 2 2 3 0 8 0 amappl11 160 60 0 46 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 1 0 1 0 8 0 amappl9 144 142 0 142 1 1 0 1 0 8 0 amappl8 136 21 0 17 1 0 1 1 0 8 0 amappl7 128 128 0 117 1 0 1 1 0 8 0 amappl6 120 185 0 184 1 0 1 1 0 8 0 amappl5 112 174 0 160 1 0 1 1 0 8 0 amappl4 104 315 0 296 1 0 1 1 0 8 0 amappl3 96 9204 0 9109 3 0 3 3 0 8 0 amappl2 88 2054 0 1971 3 1 2 3 0 8 0 amappl1 80 11900 0 11357 14 0 14 14 0 8 0 amappl 88 14552 0 14367 5 0 5 5 0 92 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 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 255 0 255 2 2 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 87 0 10 2 0 2 2 0 8 0 uaddrrnd 24 1767 0 1736 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1767 0 1736 1 0 1 1 0 8 0 vmmpekpl 168 14197 0 14148 3 0 3 3 0 8 0 vmmpepl 168 113574 0 111491 113 9 104 104 0 357 5 vmsppl 448 1766 0 1736 6 2 4 5 0 8 0 rwobjpl 56 36803 0 30161 98 0 98 98 0 8 4 pdppl 4096 3541 0 3472 107 36 71 85 0 8 2 pvpl 32 20320 0 0 164 0 164 164 0 265 0 pmappl 248 1766 0 1736 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 433 0 80 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(fffffd806d34e2c0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806d34e2b0,1) at rw_enter+0x122 rrw_enter(fffffd806d34e2b0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805f5a4b40,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f5a4b40,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd805f5a4b40,ffff800011a26d00,7,0,1,494e4644c17a302f,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd806257c348) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff81a98990,2902,8000,ffffffff81fe1a60,ffff800037216bf0) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000372169e0) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e61bc30,ffff800037216bf0,0,fffffd807f7d3410) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd8068c30150,ffff800037216bf0,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000ffff22a8,5,ffff800037216bf0,0,ffff800037216cb0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000ffff22a8,ffff800037216d60,ffff800037216cb0) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff800037216d60) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800037216d60) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeb8aca53200, 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