witness: lock order reversal: 1st 0xfffffd80696ae820 vmmaplk (&map->lock) 2nd 0xfffffd806df610a8 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806df610a8,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806df61098,1) at rw_enter+0x122 rrw_enter(fffffd806df61098,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806be5f448,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806be5f448,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806be5f448,ffff800011a26240,31,0,1,5690f39eee8d39c1,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd805f5c99e8) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff820851c0,2902,8000,ffffffff8131b440,ffff8000371e4f98) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000371e4e00) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e085eb8,ffff8000371e4f98,0,fffffd807f7d37b8) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bfc87d8,ffff8000371e4f98,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000371d9c08,4,ffff8000371e4f98,0,ffff8000371e5050) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_read(ffff8000371d9c08,ffff8000371e5100,ffff8000371e5050) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff8000371e5100) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371e5100) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9fa55ee1290, count: -16 ddb{1}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff8000371e48c0 rbx 0xfffffd80042c8708 rdx 0xffff8000012a74c0 rcx 0xffff8000371d9c08 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff8000371e47a0 r9 0x8080808080808080 r10 0xfc5ab70f7ee90c1e r11 0xd25804e627f28052 r12 0 r13 0xfffffd8003adfe00 r14 0x3 r15 0xffffffff rip 0xffffffff812ecd15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371e48b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=156695 pid=92957 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=0xffff8000371d82b8,0xffff8000371d8550 process=0xffff80002d773b00 user=0xffff8000371e0000, vmspace=0xfffffd80696ae728 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99237 11412 93090 0 2 0 syz-executor 20621 235802 83648 0 2 0 syz-executor 92957 285114 37826 0 7 0 syz-executor *92957 156695 37826 0 7 0x4000000 syz-executor 94514 385651 41578 0 3 0x80 nanoslp syz-executor 94514 249465 41578 0 3 0x4000000 smrbar syz-executor 94514 85449 41578 0 3 0x4000080 fsleep syz-executor 94514 313167 41578 0 3 0x4000000 clonelk syz-executor 90891 116969 45166 0 3 0x80 nanoslp syz-executor 90891 205987 45166 0 3 0x4000000 clonelk syz-executor 90891 250260 45166 0 3 0x4000080 fsleep syz-executor 90891 357386 45166 0 3 0x4000080 fsleep syz-executor 51474 82511 76218 0 3 0x80 nanoslp syz-executor 51474 422870 76218 0 3 0x4000080 fsleep syz-executor 51474 57370 76218 0 3 0x4000080 ttyout syz-executor 11248 190343 86420 0 3 0x4000080 nanoslp syz-executor 11248 324610 86420 0 3 0x4000080 kqsel syz-executor 11248 2004 86420 0 3 0x4000080 piperd syz-executor 11248 449539 86420 0 3 0x4000080 fsleep syz-executor 73752 117253 1 0 3 0x100083 ttyin getty 35334 122650 0 0 3 0x14200 bored sosplice 45166 215110 66770 0 3 0x82 nanoslp syz-executor 93090 183948 66770 0 3 0x82 nanoslp syz-executor 83648 112474 66770 0 3 0x82 nanoslp syz-executor 37826 257450 66770 0 3 0x82 nanoslp syz-executor 41578 322220 66770 0 3 0x82 nanoslp syz-executor 76218 499230 66770 0 3 0x82 nanoslp syz-executor 51826 350742 66770 0 3 0x82 wait syz-executor 86420 40305 66770 0 3 0x82 nanoslp syz-executor 66770 379124 41358 0 3 0x82 kqread syz-executor 41358 258339 38679 0 3 0x10008a sigsusp ksh 38679 332553 2534 0 3 0x98 kqread sshd-session 2534 260520 52047 0 3 0x92 kqread sshd-session 52047 248125 1 0 3 0x88 kqread sshd 97993 328683 59266 74 3 0x1100092 bpf pflogd 59266 188377 1 0 3 0x80 sbwait pflogd 46713 390793 63594 73 3 0x1100090 kqread syslogd 63594 273778 1 0 3 0x100082 sbwait syslogd 61398 376625 1 0 3 0x100080 kqread resolvd 73625 267848 57399 77 3 0x100092 kqread dhcpleased 77729 435105 57399 77 3 0x100092 kqread dhcpleased 57399 50660 1 0 3 0x80 kqread dhcpleased 13802 438177 0 0 3 0x14200 bored smr 20376 508558 0 0 3 0x14200 pgzero zerothread 64350 98772 0 0 3 0x14200 aiodoned aiodoned 69594 428956 0 0 3 0x14200 syncer update 5518 188766 0 0 3 0x14200 cleaner cleaner 74724 186834 0 0 3 0x14200 reaper reaper 24491 492313 0 0 3 0x14200 pgdaemon pagedaemon 30854 333233 0 0 3 0x14200 bored viomb 1143 466601 0 0 3 0x40014200 acpi0 acpi0 92990 131740 0 0 3 0x40014200 idle1 99748 332308 0 0 3 0x14200 bored softnet3 60952 55095 0 0 3 0x14200 bored softnet2 11895 19952 0 0 3 0x14200 bored softnet1 40608 108908 0 0 3 0x14200 bored softnet0 19945 386350 0 0 3 0x14200 bored systqmp 84212 346404 0 0 3 0x14200 bored systq 59535 279502 0 0 3 0x14200 tmoslp softclockmp 68280 8642 0 0 3 0x40014200 tmoslp softclock 44203 248744 0 0 3 0x40014200 idle0 1 124839 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 92957 (syz-executor) thread 0xffff8000371d9c08 (156695) shared rwlock vmmaplk r = 0 (0xfffffd80696ae820) #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 (0xffffffff836258d8) #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 94514 (syz-executor) thread 0xffff8000371d8f60 (249465) exclusive rwlock clonelk r = 0 (0xffffffff8343e420) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 if_clone_destroy+0x67 #2 ifioctl+0x5c5 #3 sys_ioctl+0x67c #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 11185K 11556K 166960K 12397 0 pcb 18 13K 14K 166960K 232 0 rtable 189 5K 7K 166960K 444 0 pf 37 18K 21K 166960K 93 0 ifaddr 39 6K 7K 166960K 65 0 ifgroup 55 2K 2K 166960K 99 0 sysctl 2 0K 0K 166960K 6 0 counters 64 36K 36K 166960K 94 0 ioctlops 0 0K 4K 166960K 1597 0 iov 0 0K 28K 166960K 40 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1451 91K 92K 166960K 2030 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 22 0 dirhash 12 2K 3K 166960K 27 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 97K 166960K 722 0 sigio 0 0K 0K 166960K 14 0 proc 72 91K 140K 166960K 599 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 78 0 in_multi 87 6K 7K 166960K 130 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 518 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 250 77K 90K 166960K 8457 0 UVM aobj 23 2K 2K 166960K 24 0 pinsyscall 43 86K 104K 166960K 1805 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 53 0 NDP 12 0K 1K 166960K 44 0 temp 58 6823K 7071K 166960K 19757 0 kqueue 14 22K 30K 166960K 116 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 109 0 104 2 1 1 2 0 8 0 rtentry 112 126 0 40 4 0 4 4 0 8 0 unpcb 144 336 0 315 2 0 2 2 0 8 1 syncache 336 3 0 3 2 2 0 1 0 8 0 tcpcb 808 379 0 375 8 0 8 8 0 8 7 arp 120 22 0 5 1 0 1 1 0 8 0 inpcb 336 1056 0 1042 7 0 7 7 0 8 5 nd6 136 30 0 7 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 10 0 10 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 7 0 4 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 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 65 0 3 1 0 1 1 0 8 0 pfstkey 128 66 0 4 3 0 3 3 0 8 0 pfstate 376 65 0 4 7 0 7 7 0 8 0 pfrule 1344 25 0 16 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 527 0 120 30 0 30 30 0 8 2 art_table 32 528 0 120 4 0 4 4 0 8 0 art_node 16 125 0 48 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 21 0 1 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2692 0 1201 95 0 95 95 0 8 0 ffsino 272 2692 0 1201 102 0 102 102 0 8 0 nchpl 144 3790 0 3249 63 32 31 63 0 8 7 uvmvnodes 80 3200 0 0 66 0 66 66 0 8 0 vnodes 216 3200 0 0 178 0 178 178 0 8 0 namei 1024 13217 0 13217 3 2 1 2 0 8 1 percpumem 16 61 0 15 1 0 1 1 0 8 0 kstatmem 264 54 0 30 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 11056 0 11056 10 2 8 8 1 8 8 plimitpl 152 103 0 84 1 0 1 1 0 8 0 sigapl 424 1027 0 976 8 1 7 7 0 8 0 futexpl 64 9166 0 9161 1 0 1 1 0 8 0 knotepl 120 705 0 0 22 0 22 22 0 8 0 kqueuepl 216 170 0 160 1 0 1 1 0 8 0 pipepl 320 166 0 136 3 0 3 3 0 8 0 fdescpl 496 1006 0 974 6 1 5 6 0 8 0 filepl 152 6392 0 6123 14 0 14 14 0 8 1 lockfpl 104 201 0 198 1 0 1 1 0 8 0 lockfspl 48 91 0 88 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 104 897 0 882 1 0 1 1 0 8 0 zombiepl 144 977 0 976 1 0 1 1 0 8 0 processpl 1160 1027 0 976 5 1 4 5 0 8 0 procpl 648 2085 0 2022 7 1 6 6 0 8 0 srpgc 96 8 0 8 1 0 1 1 0 8 1 sosppl 168 5 0 5 1 0 1 1 0 8 1 sockpl 664 1523 0 1483 10 0 10 10 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 20 0 0 1 0 1 1 0 8 0 mbufpl 256 403 0 0 25 0 25 25 0 8 0 bufpl 280 3293 0 112 228 0 228 228 0 8 0 anonpl 24 212280 0 208539 52 3 49 49 0 185 20 amapchunkpl 152 27510 0 26970 25 0 25 25 0 158 2 amappl16 200 5722 0 5695 21 10 11 15 0 8 8 amappl15 192 15 0 15 1 1 0 1 0 8 0 amappl14 184 117 0 105 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 1668 0 1637 4 1 3 3 0 8 0 amappl11 160 77 0 63 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 127 0 127 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 108 0 96 1 0 1 1 0 8 0 amappl6 120 167 0 165 1 0 1 1 0 8 0 amappl5 112 140 0 127 1 0 1 1 0 8 0 amappl4 104 310 0 294 1 0 1 1 0 8 0 amappl3 96 5174 0 5073 3 0 3 3 0 8 0 amappl2 88 1278 0 1192 2 0 2 2 0 8 0 amappl1 80 9324 0 8747 14 1 13 14 0 8 0 amappl 88 8044 0 7856 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 71 0 71 2 1 1 1 0 8 1 dma128 128 253 0 253 1 1 0 1 0 8 0 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 23 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1006 0 974 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1006 0 974 1 0 1 1 0 8 0 vmmpekpl 168 9239 0 9199 3 0 3 3 0 8 0 vmmpepl 168 69590 0 67671 97 0 97 97 0 357 12 vmsppl 448 1005 0 974 6 2 4 5 0 8 0 rwobjpl 56 25782 0 21603 62 1 61 61 0 8 1 pdppl 4096 2019 0 1948 101 30 71 87 0 8 0 pvpl 32 14125 0 0 114 0 114 114 0 265 0 pmappl 248 1005 0 974 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 413 0 38 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(ffffffff8348eff0) 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 __mp_lock(ffffffff836256d0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff8000371bd080,ffff800000079e00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __mp_lock(ffffffff836256d0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x73afd99c41d0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806df610a8,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806df61098,1) at rw_enter+0x122 rrw_enter(fffffd806df61098,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806be5f448,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806be5f448,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806be5f448,ffff800011a26240,31,0,1,5690f39eee8d39c1,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd805f5c99e8) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff820851c0,2902,8000,ffffffff8131b440,ffff8000371e4f98) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000371e4e00) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e085eb8,ffff8000371e4f98,0,fffffd807f7d37b8) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bfc87d8,ffff8000371e4f98,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000371d9c08,4,ffff8000371e4f98,0,ffff8000371e5050) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_read(ffff8000371d9c08,ffff8000371e5100,ffff8000371e5050) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff8000371e5100) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371e5100) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9fa55ee1290, count: -16