witness: lock order reversal: 1st 0xfffffd806beccd58 vmmaplk (&map->lock) 2nd 0xfffffd806bcef810 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{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(fffffd806bcef810,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bcef800,1) at rw_enter+0x122 rrw_enter(fffffd806bcef800,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80769488a8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80769488a8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd80769488a8,ffff800011a26080,1f,0,1,528792ef446f53e4,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd8062ee87d8) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff81206c10,2902,8000,ffffffff817cdc60,ffff80003198c3f0) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80003198c1e0) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd8076d39d08,ffff80003198c3f0,0,fffffd807f7d35b0) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806a922ac0,ffff80003198c3f0,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000ffff07c0,4,ffff80003198c3f0,0,ffff80003198c4b0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000ffff07c0,ffff80003198c560,ffff80003198c4b0) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff80003198c560) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80003198c560) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1e65aae7af0, count: -16 ddb{1}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff80003198bca0 rbx 0xfffffd80042c9240 rdx 0xffff800001325a80 rcx 0xffff8000ffff07c0 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff80003198bb80 r9 0x8080808080808080 r10 0x13d4299d3d3bc7d5 r11 0xcc0482e8f4133bff r12 0 r13 0xfffffd8003ae0e00 r14 0x3 r15 0xffffffff rip 0xffffffff817ca965 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003198bc90 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=325526 pid=56690 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff11e0,0xffff8000ffff1700 process=0xffff8000ffff44a0 user=0xffff800031987000, vmspace=0xfffffd806beccc60 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 39222 447472 66076 0 2 0 syz-executor 39222 455306 66076 0 3 0x4000080 fsleep syz-executor 56690 146580 89583 0 7 0 syz-executor *56690 325526 89583 0 7 0x4000000 syz-executor 73040 360409 49985 0 2 0 syz-executor 73040 32383 49985 0 3 0x4000080 sbwait syz-executor 69835 365741 38586 0 2 0 syz-executor 69835 376111 38586 0 3 0x4000080 fsleep syz-executor 2713 35845 49950 0 2 0 syz-executor 2713 442232 49950 0 3 0x4000080 fsleep syz-executor 82259 417205 26413 60929 3 0x90 nanoslp syz-executor 82259 204606 26413 60929 3 0x4000090 kqsel syz-executor 82259 195315 26413 60929 3 0x4000090 fsleep syz-executor 30767 296273 37913 0 3 0x80 nanoslp syz-executor 30767 163116 37913 0 3 0x4000080 kqread syz-executor 30767 56192 37913 0 3 0x4000080 fsleep syz-executor 30767 220173 37913 0 3 0x4000080 fsleep syz-executor 76033 409607 49648 0 3 0x80 nanoslp syz-executor 76033 143282 49648 0 3 0x4000080 piperd syz-executor 76033 139803 49648 0 3 0x4000080 fsleep syz-executor 91637 293268 0 0 3 0x14200 acct acct 89583 443255 71296 0 3 0x82 nanoslp syz-executor 88889 229730 1 0 3 0x100083 ttyin getty 75806 113019 0 0 3 0x14200 bored sosplice 37913 41756 71296 0 2 0x2 syz-executor 38586 523216 71296 0 3 0x82 nanoslp syz-executor 66076 112173 71296 0 3 0x82 nanoslp syz-executor 49648 169373 71296 0 3 0x82 nanoslp syz-executor 49950 23514 71296 0 3 0x82 nanoslp syz-executor 26413 290028 71296 0 3 0x82 nanoslp syz-executor 49985 518927 71296 0 3 0x82 nanoslp syz-executor 71296 75670 76689 0 3 0x82 kqread syz-executor 76689 186162 6420 0 3 0x10008a sigsusp ksh 6420 520294 52188 0 3 0x98 kqread sshd-session 52188 270674 31940 0 3 0x92 kqread sshd-session 31940 224117 1 0 3 0x88 kqread sshd 50824 69407 91354 74 3 0x1100092 bpf pflogd 91354 201261 1 0 3 0x80 sbwait pflogd 64927 291195 59469 73 3 0x1100090 kqread syslogd 59469 104624 1 0 3 0x100082 sbwait syslogd 76249 48716 1 0 3 0x100080 kqread resolvd 95153 349917 3736 77 3 0x100092 kqread dhcpleased 30359 387375 3736 77 3 0x100092 kqread dhcpleased 3736 117115 1 0 3 0x80 kqread dhcpleased 35721 353383 0 0 3 0x14200 bored smr 94397 76083 0 0 2 0x14200 zerothread 94242 17002 0 0 3 0x14200 aiodoned aiodoned 95577 347680 0 0 3 0x14200 syncer update 93129 422044 0 0 3 0x14200 cleaner cleaner 16952 56540 0 0 3 0x14200 reaper reaper 31474 300286 0 0 3 0x14200 pgdaemon pagedaemon 90548 60336 0 0 3 0x14200 bored viomb 62684 121610 0 0 3 0x40014200 acpi0 acpi0 96113 407847 0 0 3 0x40014200 idle1 54819 415701 0 0 3 0x14200 bored softnet3 4213 259621 0 0 3 0x14200 bored softnet2 986 11737 0 0 3 0x14200 bored softnet1 21865 209091 0 0 3 0x14200 bored softnet0 81950 171873 0 0 3 0x14200 bored systqmp 80340 253023 0 0 3 0x14200 bored systq 6270 7460 0 0 3 0x14200 tmoslp softclockmp 83498 466581 0 0 3 0x40014200 tmoslp softclock 34274 91895 0 0 3 0x40014200 idle0 1 309870 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 56690 (syz-executor) thread 0xffff8000ffff07c0 (325526) shared rwlock vmmaplk r = 0 (0xfffffd806beccd58) #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 (0xffffffff836331e0) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 11243K 11535K 166960K 12419 0 pcb 18 13K 14K 166960K 154 0 rtable 210 7K 9K 166960K 462 0 pf 37 18K 19K 166960K 79 0 ifaddr 39 6K 8K 166960K 64 0 ifgroup 59 2K 2K 166960K 91 0 sysctl 3 0K 0K 166960K 7 0 counters 64 36K 36K 166960K 82 0 ioctlops 0 0K 4K 166960K 1629 0 iov 1 1K 17K 166960K 39 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1430 90K 90K 166960K 1905 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 25 2K 2K 166960K 42 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 780 0 sigio 0 0K 0K 166960K 9 0 proc 72 91K 140K 166960K 615 0 subproc 104 6K 6K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 108 0 in_multi 86 6K 7K 166960K 156 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 463 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 247 73K 87K 166960K 9065 0 UVM aobj 30 4K 6K 166960K 34 0 pinsyscall 43 86K 104K 166960K 1899 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 49 0 NDP 12 0K 2K 166960K 41 0 temp 80 6829K 6894K 166960K 20136 0 kqueue 18 30K 30K 166960K 124 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 68 0 65 1 0 1 1 0 8 0 rtentry 112 140 0 47 4 0 4 4 0 8 0 unpcb 144 494 0 475 5 1 4 4 0 8 3 syncache 336 7 0 7 3 2 1 1 0 8 1 tcpqe 32 8 0 8 1 0 1 1 0 8 1 tcpcb 808 339 0 332 8 0 8 8 0 8 7 arp 120 25 0 8 1 0 1 1 0 8 0 inpcb 336 1030 0 1013 7 0 7 7 0 8 4 nd6 136 31 0 8 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 3 0 3 1 0 1 1 0 8 1 pffrag 232 6 0 1 1 0 1 1 0 482 0 pffrnode 88 6 0 1 1 0 1 1 0 8 0 pffrent 40 53 0 48 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 72 0 10 1 0 1 1 0 8 0 pfstkey 128 72 0 10 3 0 3 3 0 8 0 pfstate 376 72 0 10 7 0 7 7 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 256 591 0 210 32 0 32 32 0 8 3 art_table 32 593 0 210 5 0 5 5 0 8 0 art_node 16 139 0 58 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 1 1 0 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 34 0 11 1 0 1 1 0 8 0 shmpl 112 31 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2712 0 1205 95 0 95 95 0 8 0 ffsino 272 2712 0 1205 101 0 101 101 0 8 0 nchpl 144 3810 0 2119 63 0 63 63 0 8 0 uvmvnodes 80 3164 0 0 65 0 65 65 0 8 0 vnodes 216 3164 0 0 176 0 176 176 0 8 0 namei 1024 13110 0 13110 2 1 1 2 0 8 1 percpumem 16 55 0 9 1 0 1 1 0 8 0 kstatmem 264 42 0 18 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 11590 0 11590 11 3 8 8 1 8 8 plimitpl 152 115 0 96 1 0 1 1 0 8 0 sigapl 424 1086 0 1034 7 1 6 7 0 8 0 futexpl 64 10102 0 10095 1 0 1 1 0 8 0 knotepl 120 317 0 0 10 0 10 10 0 8 0 kqueuepl 216 260 0 245 5 4 1 5 0 8 0 pipepl 320 225 0 197 6 0 6 6 0 8 3 fdescpl 496 1063 0 1031 5 0 5 5 0 8 0 filepl 152 6067 0 5802 13 0 13 13 0 8 0 lockfpl 104 200 0 197 1 0 1 1 0 8 0 lockfspl 48 88 0 85 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 42 0 25 1 0 1 1 0 8 0 ucredpl 104 680 0 665 1 0 1 1 0 8 0 zombiepl 144 1034 0 1034 1 0 1 1 0 8 1 processpl 1160 1086 0 1034 5 1 4 5 0 8 0 procpl 648 2144 0 2080 6 0 6 6 0 8 0 srpgc 96 8 0 8 2 1 1 1 0 8 1 sosppl 168 12 0 12 1 0 1 1 0 8 1 sockpl 664 1608 0 1569 10 0 10 10 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 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 139 0 0 18 0 18 18 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 42 0 0 2 0 2 2 0 8 0 mbufpl 256 269 0 0 17 0 17 17 0 8 0 bufpl 280 3723 0 99 259 0 259 259 0 8 0 anonpl 24 205300 0 201802 37 7 30 36 0 185 3 amapchunkpl 152 29184 0 28643 29 1 28 28 0 158 6 amappl16 200 4925 0 4893 9 3 6 6 0 8 3 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 128 0 116 1 0 1 1 0 8 0 amappl13 176 12 0 12 1 1 0 1 0 8 0 amappl12 168 1726 0 1694 4 1 3 3 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 139 0 139 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 115 0 103 1 0 1 1 0 8 0 amappl6 120 176 0 175 1 0 1 1 0 8 0 amappl5 112 148 0 136 1 0 1 1 0 8 0 amappl4 104 333 0 315 1 0 1 1 0 8 0 amappl3 96 5426 0 5320 3 0 3 3 0 8 0 amappl2 88 1379 0 1293 3 0 3 3 0 8 0 amappl1 80 10538 0 9969 16 2 14 14 0 8 0 amappl 88 8581 0 8396 5 0 5 5 0 92 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 128 253 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 33 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1063 0 1031 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1063 0 1031 1 0 1 1 0 8 0 vmmpekpl 168 10414 0 10377 3 0 3 3 0 8 0 vmmpepl 168 73080 0 71155 91 1 90 90 0 357 3 vmsppl 448 1062 0 1031 6 2 4 5 0 8 0 rwobjpl 56 26372 0 22230 59 0 59 59 0 8 0 pdppl 4096 2133 0 2062 109 36 73 85 0 8 2 pvpl 32 13855 0 0 112 0 112 112 0 265 0 pmappl 248 1062 0 1031 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 414 0 44 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(ffffffff83472ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:159 intr_handler(ffff80002a0701a0,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83632fd8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83632fd8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a070300,ffff800000079e00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83632fd8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83632fd8) at __mp_lock+0x1a3 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: 0x700435be7860, count: -13 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(fffffd806bcef810,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bcef800,1) at rw_enter+0x122 rrw_enter(fffffd806bcef800,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80769488a8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80769488a8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd80769488a8,ffff800011a26080,1f,0,1,528792ef446f53e4,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd8062ee87d8) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff81206c10,2902,8000,ffffffff817cdc60,ffff80003198c3f0) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80003198c1e0) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd8076d39d08,ffff80003198c3f0,0,fffffd807f7d35b0) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806a922ac0,ffff80003198c3f0,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000ffff07c0,4,ffff80003198c3f0,0,ffff80003198c4b0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000ffff07c0,ffff80003198c560,ffff80003198c4b0) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff80003198c560) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80003198c560) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1e65aae7af0, count: -16