witness: lock order reversal: 1st 0xfffffd806ca649d0 vmmaplk (&map->lock) 2nd 0xfffffd806e8c5818 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(fffffd806e8c5818,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806e8c5808,1) at rw_enter+0x122 rrw_enter(fffffd806e8c5808,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806b9d8130,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806b9d8130,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806b9d8130,ffff800011a26140,df,0,1,b2729d55bcf91b8d,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd805fd71c48) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff8143a5c0,2902,8000,ffffffff8153d7c0,ffff8000372156a8) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff800037215510) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd8072367b58,ffff8000372156a8,0,fffffd807f7d3548) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bad7d28,ffff8000372156a8,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff800035f9b468,3,ffff8000372156a8,0,ffff800037215760) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_read(ffff800035f9b468,ffff800037215810,ffff800037215760) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff800037215810) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800037215810) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe871cea2b60, count: -16 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff800037214fd0 rbx 0xfffffd80042c2250 rdx 0xffff800001284b00 rcx 0xffff800035f9b468 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff800037214eb0 r9 0x8080808080808080 r10 0xa58d3949acd2553c r11 0x93b625f279a457cb r12 0 r13 0xfffffd8003adae00 r14 0x3 r15 0xffffffff rip 0xffffffff82f37f75 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037214fc0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=502414 pid=73212 tcnt=2 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=0xffff800035f9a2b0,0xffff800035f9bc10 process=0xffff800037285b38 user=0xffff800037210000, vmspace=0xfffffd806ca648d8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90746 197306 80669 0 2 0 syz-executor 90746 110193 80669 0 2 0x4000000 syz-executor 73212 495949 61073 0 2 0 syz-executor *73212 502414 61073 0 7 0x4000000 syz-executor 68213 284050 57370 0 2 0 syz-executor 68213 334504 57370 0 3 0x4000080 fsleep syz-executor 44465 89512 46162 0 2 0 syz-executor 44465 456473 46162 0 3 0x4000080 fsleep syz-executor 25239 3082 642 0 2 0 syz-executor 25239 154804 642 0 3 0x4000080 piperd syz-executor 23976 301000 73292 0 2 0 syz-executor 23976 447502 73292 0 3 0x4000080 fsleep syz-executor 23976 511969 73292 0 3 0x4000080 fsleep syz-executor 99984 469425 33044 0 3 0x80 nanoslp syz-executor 99984 29440 33044 0 3 0x4000080 sbwait syz-executor 99984 300062 33044 0 3 0x4000080 fsleep syz-executor 64496 343035 95734 -1 3 0x90 nanoslp syz-executor 64496 80325 95734 -1 3 0x4000090 kqsel syz-executor 64496 378984 95734 -1 3 0x4000090 fsleep syz-executor 14460 431725 0 0 3 0x14280 nfsidl nfsio 23332 522780 0 0 3 0x14280 nfsidl nfsio 5115 277056 0 0 3 0x14280 nfsidl nfsio 8715 218067 0 0 3 0x14280 nfsidl nfsio 94811 457779 0 0 3 0x14280 nfsidl nfsio 33208 322342 0 0 3 0x14280 nfsidl nfsio 11863 81334 0 0 3 0x14280 nfsidl nfsio 40257 76971 0 0 3 0x14280 nfsidl nfsio 40023 289237 0 0 3 0x14280 nfsidl nfsio 92930 491661 0 0 3 0x14280 nfsidl nfsio 87994 109949 0 0 3 0x14280 nfsidl nfsio 38358 409482 0 0 3 0x14280 nfsidl nfsio 54480 412267 0 0 3 0x14280 nfsidl nfsio 71555 506279 0 0 3 0x14280 nfsidl nfsio 84354 327429 0 0 3 0x14280 nfsidl nfsio 40749 316098 0 0 3 0x14280 nfsidl nfsio 50918 486555 0 0 3 0x14280 nfsidl nfsio 70066 449051 0 0 3 0x14280 nfsidl nfsio 81612 71372 0 0 3 0x14280 nfsidl nfsio 43652 9989 0 0 3 0x14280 nfsidl nfsio 13892 265746 1 0 3 0x100083 ttyin getty 88409 326669 0 0 3 0x14200 bored sosplice 95734 190577 59401 0 3 0x82 nanoslp syz-executor 57370 246087 59401 0 3 0x82 nanoslp syz-executor 80669 103081 59401 0 3 0x82 nanoslp syz-executor 642 26957 59401 0 3 0x82 nanoslp syz-executor 33044 69235 59401 0 3 0x82 nanoslp syz-executor 73292 483672 59401 0 3 0x82 nanoslp syz-executor 61073 22916 59401 0 3 0x82 nanoslp syz-executor 46162 82868 59401 0 3 0x82 nanoslp syz-executor 59401 442447 31756 0 3 0x82 kqread syz-executor 31756 456432 8766 0 3 0x10008a sigsusp ksh 8766 192854 36530 0 3 0x98 kqread sshd-session 36530 497838 27130 0 3 0x92 kqread sshd-session 27130 451219 1 0 3 0x88 kqread sshd 1440 6099 21982 74 3 0x1100092 bpf pflogd 21982 95895 1 0 3 0x80 sbwait pflogd 49289 296540 76950 73 3 0x1100090 kqread syslogd 76950 40585 1 0 3 0x100082 sbwait syslogd 6153 159030 1 0 3 0x100080 kqread resolvd 37942 166827 36588 77 3 0x100092 kqread dhcpleased 56306 368821 36588 77 3 0x100092 kqread dhcpleased 36588 42971 1 0 3 0x80 kqread dhcpleased 6334 147938 0 0 3 0x14200 bored smr 18645 168371 0 0 2 0x14200 zerothread 7359 443271 0 0 3 0x14200 aiodoned aiodoned 21845 20065 0 0 3 0x14200 syncer update 14437 369636 0 0 3 0x14200 cleaner cleaner 533 166739 0 0 3 0x14200 reaper reaper 61648 94021 0 0 3 0x14200 pgdaemon pagedaemon 80019 284319 0 0 3 0x14200 bored viomb 24703 269629 0 0 3 0x40014200 acpi0 acpi0 32521 62759 0 0 7 0x40014200 idle1 59202 28157 0 0 3 0x14200 bored softnet3 93495 482343 0 0 3 0x14200 bored softnet2 4449 318768 0 0 3 0x14200 bored softnet1 40623 69996 0 0 2 0x14200 softnet0 8759 428497 0 0 3 0x14200 bored systqmp 46154 519692 0 0 3 0x14200 bored systq 81117 429949 0 0 3 0x14200 tmoslp softclockmp 61477 167151 0 0 3 0x40014200 tmoslp softclock 49391 87877 0 0 3 0x40014200 idle0 1 54823 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 73212 (syz-executor) thread 0xffff800035f9b468 (502414) shared rwlock vmmaplk r = 0 (0xfffffd806ca649d0) #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 (0xffffffff8350aba8) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10208 11208K 11731K 166960K 13260 0 pcb 17 15K 17K 166960K 244 0 rtable 222 8K 8K 166960K 469 0 pf 36 18K 21K 166960K 113 0 ifaddr 41 7K 8K 166960K 77 0 ifgroup 55 2K 2K 166960K 130 0 sysctl 4 1K 1K 166960K 6 0 counters 64 36K 36K 166960K 108 0 ioctlops 0 0K 4K 166960K 1631 0 iov 1 2K 20K 166960K 114 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1479 93K 94K 166960K 2480 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 42 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 97K 166960K 1200 0 sigio 0 0K 0K 166960K 81 0 proc 72 91K 152K 166960K 631 0 subproc 104 6K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 112 0 in_multi 88 6K 7K 166960K 143 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 836 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 249 73K 91K 166960K 12895 0 UVM aobj 131 6K 6K 166960K 134 0 pinsyscall 43 86K 104K 166960K 2307 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 54 0 NDP 12 0K 2K 166960K 53 0 temp 69 6826K 6901K 166960K 57800 0 kqueue 13 20K 28K 166960K 218 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 96 0 93 1 0 1 1 0 8 0 rtentry 112 147 0 48 4 0 4 4 0 8 0 unpcb 144 679 0 659 6 4 2 4 0 8 1 syncache 336 9 0 9 3 2 1 1 0 8 1 tcpqe 32 5 0 5 2 1 1 1 0 8 1 tcpcb 808 305 0 296 6 4 2 5 0 8 0 arp 120 28 0 10 1 0 1 1 0 8 0 ipq 40 4 0 2 1 0 1 1 0 8 0 ipqe 40 97 0 94 1 0 1 1 0 8 0 inpcb 336 1437 0 1422 23 10 13 13 0 8 9 nd6 136 33 0 7 1 0 1 1 0 8 0 pkpcb 40 18 0 18 3 2 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 10 0 10 3 2 1 1 0 8 1 pfstscr 40 4 0 3 3 2 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 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 1 0 0 1 0 1 1 0 8 0 pfstitem 24 51 0 24 1 0 1 1 0 8 0 pfstkey 128 55 0 26 2 0 2 2 0 8 0 pfstate 376 50 0 25 5 0 5 5 0 8 0 pfrule 1344 27 0 19 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 544 0 108 29 1 28 29 0 8 0 art_table 32 546 0 108 4 0 4 4 0 8 0 art_node 16 141 0 54 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 12 1 0 1 1 0 8 0 semapl 112 39 0 29 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 3676 0 2177 95 0 95 95 0 8 0 ffsino 272 3676 0 2177 102 1 101 102 0 8 0 nchpl 144 5427 0 3734 63 0 63 63 0 8 0 uvmvnodes 80 4400 0 0 90 0 90 90 0 8 0 vnodes 216 4400 0 0 245 0 245 245 0 8 0 namei 1024 18946 0 18946 3 2 1 2 0 8 1 percpumem 16 68 0 22 1 0 1 1 0 8 0 kstatmem 264 68 0 44 2 0 2 2 0 8 0 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 15710 0 15710 13 11 2 8 1 8 2 plimitpl 152 370 0 352 1 0 1 1 0 8 0 sigapl 424 1528 0 1457 9 1 8 8 0 8 0 futexpl 64 16925 0 16919 1 0 1 1 0 8 0 knotepl 120 568 0 0 17 0 17 17 0 8 0 kqueuepl 216 339 0 328 1 0 1 1 0 8 0 pipepl 320 444 0 416 15 9 6 8 0 8 3 fdescpl 496 1488 0 1456 6 1 5 6 0 8 0 filepl 152 10116 0 9858 25 8 17 18 0 8 4 lockfpl 104 475 0 471 1 0 1 1 0 8 0 lockfspl 48 174 0 171 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 47 0 30 1 0 1 1 0 8 0 ucredpl 104 2113 0 2098 1 0 1 1 0 8 0 zombiepl 144 1457 0 1457 2 1 1 1 0 8 1 processpl 1160 1528 0 1457 7 1 6 6 0 8 0 procpl 648 3302 0 3220 9 1 8 8 0 8 0 srpgc 96 5 0 5 2 2 0 1 0 8 0 sosppl 168 18 0 16 4 3 1 1 0 8 0 sockpl 664 2246 0 2210 29 14 15 15 0 8 11 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 17 0 17 17 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 153 0 0 4 0 4 4 0 8 0 mbufpl 256 411 0 0 26 0 26 26 0 8 0 bufpl 280 4767 0 106 333 0 333 333 0 8 0 anonpl 24 264652 0 258871 76 28 48 59 0 185 4 amapchunkpl 152 42127 0 41532 41 11 30 33 0 158 4 amappl16 200 6677 0 6590 29 20 9 18 0 8 0 amappl15 192 12 0 11 1 0 1 1 0 8 0 amappl14 184 136 0 123 1 0 1 1 0 8 0 amappl13 176 42 0 42 1 1 0 1 0 8 0 amappl12 168 2169 0 2137 4 2 2 3 0 8 0 amappl11 160 57 0 42 1 0 1 1 0 8 0 amappl10 152 14 0 14 1 1 0 1 0 8 0 amappl9 144 147 0 146 2 1 1 1 0 8 0 amappl8 136 42 0 39 1 0 1 1 0 8 0 amappl7 128 119 0 107 1 0 1 1 0 8 0 amappl6 120 171 0 170 1 0 1 1 0 8 0 amappl5 112 145 0 133 1 0 1 1 0 8 0 amappl4 104 341 0 322 1 0 1 1 0 8 0 amappl3 96 7873 0 7771 3 0 3 3 0 8 0 amappl2 88 1826 0 1739 3 0 3 3 0 8 0 amappl1 80 12215 0 11640 16 2 14 14 0 8 1 amappl 88 12377 0 12190 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 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 6 0 6 1 1 0 1 0 8 0 dma128 128 257 0 257 3 2 1 1 0 8 1 dma64 64 6 0 6 1 1 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 1488 0 1456 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1488 0 1456 1 0 1 1 0 8 0 vmmpekpl 168 14001 0 13961 3 0 3 3 0 8 0 vmmpepl 168 98480 0 96493 105 11 94 94 0 357 2 vmsppl 448 1487 0 1456 6 2 4 5 0 8 0 rwobjpl 56 33973 0 28433 79 0 79 79 0 8 0 pdppl 4096 2983 0 2912 119 48 71 87 0 8 0 pvpl 32 16216 0 0 131 0 131 131 0 265 0 pmappl 248 1487 0 1456 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 449 0 77 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(fffffd806e8c5818,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806e8c5808,1) at rw_enter+0x122 rrw_enter(fffffd806e8c5808,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806b9d8130,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806b9d8130,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806b9d8130,ffff800011a26140,df,0,1,b2729d55bcf91b8d,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd805fd71c48) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff8143a5c0,2902,8000,ffffffff8153d7c0,ffff8000372156a8) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff800037215510) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd8072367b58,ffff8000372156a8,0,fffffd807f7d3548) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bad7d28,ffff8000372156a8,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff800035f9b468,3,ffff8000372156a8,0,ffff800037215760) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_read(ffff800035f9b468,ffff800037215810,ffff800037215760) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff800037215810) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800037215810) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe871cea2b60, 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