witness: lock order reversal: 1st 0xfffffd80698d5d58 vmmaplk (&map->lock) 2nd 0xfffffd806deb8918 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(fffffd806deb8918,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806deb8908,1) at rw_enter+0x122 rrw_enter(fffffd806deb8908,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806b8b47a0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806b8b47a0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806b8b47a0,ffff800011a26080,1f,0,1,db8e4c8f896e86b,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd80685a98f0) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff815ff3a0,2902,8000,ffffffff8290c0d0,ffff8000317a9a60) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000317a9850) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806de82eb8,ffff8000317a9a60,0,fffffd807f7d3340) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806c004430,ffff8000317a9a60,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff800031984030,3,ffff8000317a9a60,0,ffff8000317a9b20) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff800031984030,ffff8000317a9bd0,ffff8000317a9b20) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff8000317a9bd0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000317a9bd0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfd30fb81b70, count: -16 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff8000317a9310 rbx 0xfffffd80042c6cf0 rdx 0xffff8000012a2540 rcx 0xffff800031984030 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff8000317a91f0 r9 0x8080808080808080 r10 0xf54885f3b8e1eb8a r11 0x6b7da7c007598a59 r12 0 r13 0xfffffd8003adee00 r14 0x3 r15 0xffffffff rip 0xffffffff829b8bf5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000317a9300 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=412392 pid=83938 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800031985980,0xffff800031984a60 process=0xffff800031979228 user=0xffff8000317a4000, vmspace=0xfffffd80698d5c60 estcpu=34, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97223 174387 89361 0 2 0 syz-executor 14801 482102 29958 0 2 0 syz-executor 14801 197291 29958 0 3 0x4000080 fsleep syz-executor 83938 156094 17404 0 2 0 syz-executor *83938 412392 17404 0 7 0x4000000 syz-executor 17611 395113 51171 0 2 0 syz-executor 17611 464214 51171 0 3 0x4000080 rest syz-executor 17611 7886 51171 0 3 0x4000080 bell syz-executor 63086 160123 78926 0 3 0x80 nanoslp syz-executor 63086 123874 78926 0 3 0x4000080 fsleep syz-executor 70061 192287 10146 0 3 0x1000080 nanoslp syz-executor 70061 274253 10146 0 2 0x5000000 syz-executor 87674 215882 1 0 3 0x100083 ttyin getty 22993 334563 0 0 3 0x14200 acct acct 89361 397133 78505 0 3 0x82 nanoslp syz-executor 53923 141131 78505 0 2 0x482 syz-executor 29559 12673 78505 0 3 0x82 nanoslp syz-executor 10146 81644 78505 0 3 0x82 nanoslp syz-executor 41756 77235 0 0 3 0x14280 nfsidl nfsio 94983 267598 0 0 3 0x14280 nfsidl nfsio 67063 165124 0 0 3 0x14280 nfsidl nfsio 62718 330571 0 0 3 0x14280 nfsidl nfsio 50314 44502 0 0 3 0x14280 nfsidl nfsio 79968 520378 0 0 3 0x14280 nfsidl nfsio 19592 181006 0 0 3 0x14280 nfsidl nfsio 9108 455330 0 0 3 0x14280 nfsidl nfsio 44723 221741 0 0 3 0x14280 nfsidl nfsio 78262 251720 0 0 3 0x14280 nfsidl nfsio 55837 353651 0 0 3 0x14280 nfsidl nfsio 65587 4507 0 0 3 0x14280 nfsidl nfsio 63182 145996 0 0 3 0x14280 nfsidl nfsio 62575 521447 0 0 3 0x14280 nfsidl nfsio 20065 76379 0 0 3 0x14280 nfsidl nfsio 86380 446868 0 0 3 0x14280 nfsidl nfsio 69810 523643 0 0 3 0x14280 nfsidl nfsio 12503 162369 0 0 3 0x14280 nfsidl nfsio 89489 12594 0 0 3 0x14280 nfsidl nfsio 91743 371891 0 0 3 0x14280 nfsidl nfsio 78926 495194 78505 0 3 0x82 nanoslp syz-executor 36433 394538 0 0 3 0x14200 bored sosplice 29958 363774 78505 0 3 0x82 nanoslp syz-executor 17404 406006 78505 0 3 0x82 nanoslp syz-executor 51171 484227 78505 0 3 0x82 nanoslp syz-executor 78505 302282 14482 0 3 0x82 kqread syz-executor 14482 338500 18182 0 3 0x10008a sigsusp ksh 18182 495592 69070 0 3 0x98 kqread sshd-session 69070 17631 4244 0 3 0x92 kqread sshd-session 4244 491757 1 0 3 0x88 kqread sshd 11777 263225 50915 74 3 0x1100092 bpf pflogd 50915 311918 1 0 3 0x80 sbwait pflogd 84663 28268 494 73 3 0x1100090 kqread syslogd 494 476748 1 0 3 0x100082 sbwait syslogd 48728 249965 1 0 3 0x100080 kqread resolvd 98928 421959 96357 77 3 0x100092 kqread dhcpleased 16955 73202 96357 77 3 0x100092 kqread dhcpleased 96357 146136 1 0 3 0x80 kqread dhcpleased 15362 107051 0 0 3 0x14200 bored smr 67889 348860 0 0 2 0x14200 zerothread 35307 428408 0 0 3 0x14200 aiodoned aiodoned 35304 346720 0 0 3 0x14200 syncer update 47581 11077 0 0 3 0x14200 cleaner cleaner 91198 157025 0 0 3 0x14200 reaper reaper 63463 105385 0 0 3 0x14200 pgdaemon pagedaemon 72991 221343 0 0 3 0x14200 bored viomb 11534 511423 0 0 3 0x40014200 acpi0 acpi0 84396 87793 0 0 7 0x40014200 idle1 75007 398352 0 0 3 0x14200 bored softnet3 1426 466333 0 0 3 0x14200 bored softnet2 81094 243521 0 0 3 0x14200 bored softnet1 24554 11945 0 0 3 0x14200 bored softnet0 60094 339007 0 0 3 0x14200 bored systqmp 25505 455165 0 0 3 0x14200 bored systq 43513 126194 0 0 3 0x14200 tmoslp softclockmp 92874 464988 0 0 2 0x40014200 softclock 44150 128920 0 0 3 0x40014200 idle0 1 393413 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &cq->cq_mtx r = 0 (0xffff800029b7cde8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 clockintr_dispatch+0xf3 sys/kern/kern_clockintr.c:180 #4 lapic_clockintr+0x51 sys/arch/amd64/amd64/lapic.c:489 #5 Xresume_lapic_ltimer+0x2a #6 acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 #7 sched_idle+0x558 sys/kern/kern_sched.c:182 #8 proc_trampoline+0x10 Process 83938 (syz-executor) thread 0xffff800031984030 (412392) shared rwlock vmmaplk r = 0 (0xfffffd80698d5d58) #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 (0xffffffff8357fcc8) #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 10240 11275K 11728K 166960K 16580 0 pcb 17 20K 23K 166960K 1047 0 rtable 254 9K 10K 166960K 938 0 pf 47 20K 274K 166960K 236 0 ifaddr 46 8K 9K 166960K 150 0 ifgroup 63 2K 2K 166960K 219 0 sysctl 4 1K 3K 166960K 12 0 counters 68 36K 37K 166960K 176 0 ioctlops 0 0K 4K 166960K 1957 0 iov 0 0K 32K 166960K 258 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1483 93K 94K 166960K 4539 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 60K 62K 166960K 61 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 160 0 dirhash 12 2K 3K 166960K 114 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 89K 166960K 3331 0 sigio 0 0K 0K 166960K 221 0 proc 72 91K 140K 166960K 1065 0 subproc 104 6K 6K 166960K 209 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 699 0 in_multi 97 7K 7K 166960K 355 0 ether_multi 2 0K 0K 166960K 38 0 mrt 1 0K 0K 166960K 19 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 1004 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 245 73K 87K 166960K 33215 0 UVM aobj 127 8K 8K 166960K 138 0 pinsyscall 43 86K 102K 166960K 4766 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 206 0 NDP 14 0K 1K 166960K 111 0 temp 80 6828K 7084K 166960K 124033 0 kqueue 14 22K 31K 166960K 542 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 120 414 0 411 6 5 1 3 0 8 0 rtentry 112 296 0 184 4 0 4 4 0 8 0 unpcb 144 2926 0 2905 29 28 1 6 0 8 0 syncache 336 27 0 27 6 6 0 1 0 8 0 tcpqe 32 10 0 10 6 6 0 1 0 8 0 tcpcb 808 1419 0 1410 34 32 2 8 0 8 0 arp 120 49 0 29 1 0 1 1 0 8 0 ipq 40 20 0 19 1 0 1 1 0 8 0 ipqe 40 279 0 278 1 0 1 1 0 8 0 inpcb 336 5049 0 5036 72 70 2 13 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 1 0 1 1 1 0 1 0 8 0 nd6 136 73 0 42 2 0 2 2 0 8 0 pkpcb 40 86 0 86 6 5 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1168 35 0 35 8 8 0 1 0 8 0 pfstscr 40 6 0 5 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 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 264 1 0 1 1 1 0 1 0 8 0 pfstitem 24 25 0 17 1 0 1 1 0 8 0 pfstkey 128 39 0 27 1 0 1 1 0 8 0 pfstate 376 26 0 21 2 0 2 2 0 8 0 pfrule 1344 46 0 38 2 1 1 2 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1203 0 744 43 14 29 33 0 8 0 art_table 32 1208 0 744 5 0 5 5 0 8 0 art_node 16 286 0 190 1 0 1 1 0 8 0 sysvmsgpl 40 88 0 79 1 0 1 1 0 8 0 semapl 112 131 0 121 1 0 1 1 0 8 0 shmpl 112 135 0 11 4 0 4 4 0 8 0 dirhash 1024 86 0 69 3 0 3 3 0 8 0 dino2pl 256 7694 0 6173 96 0 96 96 0 8 0 ffsino 272 7694 0 6173 102 0 102 102 0 8 0 nchpl 144 12385 0 11763 64 39 25 64 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 47495 0 47495 6 5 1 2 0 8 1 percpumem 16 102 0 54 1 0 1 1 0 8 0 kstatmem 264 136 0 108 4 2 2 3 0 8 0 scsiplug 72 17 0 17 8 8 0 1 0 8 0 scxspl 216 39514 0 39514 15 14 1 8 1 8 1 plimitpl 152 859 0 842 1 0 1 1 0 8 0 sigapl 424 3679 0 3607 11 2 9 9 0 8 0 futexpl 64 49392 0 49390 1 0 1 1 0 8 0 knotepl 120 687 0 0 19 0 19 19 0 8 0 kqueuepl 216 1023 0 1013 8 7 1 6 0 8 0 pipepl 320 701 0 674 17 14 3 8 0 8 0 fdescpl 496 3631 0 3599 5 0 5 5 0 8 0 filepl 152 28968 0 28711 47 33 14 20 0 8 0 lockfpl 104 1542 0 1538 3 2 1 2 0 8 0 lockfspl 48 506 0 502 1 0 1 1 0 8 0 sessionpl 144 56 0 47 1 0 1 1 0 8 0 pgrppl 48 152 0 135 1 0 1 1 0 8 0 ucredpl 104 5574 0 5560 1 0 1 1 0 8 0 zombiepl 144 3934 0 3932 2 1 1 1 0 8 0 processpl 1160 3679 0 3607 7 1 6 6 0 8 0 procpl 648 8811 0 8733 11 3 8 8 0 8 0 srpgc 96 15 0 15 5 5 0 1 0 8 0 sosppl 168 24 0 24 7 6 1 1 0 8 1 sockpl 664 8633 0 8597 98 94 4 21 0 8 0 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 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 148 0 0 18 1 17 18 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 94 0 0 11 4 7 11 0 8 0 mtagpl 96 111 0 0 2 0 2 2 0 8 0 mbufpl 256 414 0 0 22 0 22 22 0 8 0 bufpl 280 12871 0 6696 442 0 442 442 0 8 0 anonpl 24 530512 0 522357 159 91 68 73 0 185 1 amapchunkpl 152 107275 0 106663 67 39 28 32 0 158 0 amappl16 200 14158 0 13927 98 77 21 24 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 180 0 168 1 0 1 1 0 8 0 amappl13 176 11 0 11 3 3 0 1 0 8 0 amappl12 168 4442 0 4410 3 1 2 2 0 8 0 amappl11 160 59 0 45 1 0 1 1 0 8 0 amappl10 152 22 0 22 3 3 0 1 0 8 0 amappl9 144 216 0 216 1 1 0 1 0 8 0 amappl8 136 26 0 22 1 0 1 1 0 8 0 amappl7 128 154 0 141 1 0 1 1 0 8 0 amappl6 120 250 0 248 1 0 1 1 0 8 0 amappl5 112 203 0 191 1 0 1 1 0 8 0 amappl4 104 461 0 440 1 0 1 1 0 8 0 amappl3 96 19807 0 19707 3 0 3 3 0 8 0 amappl2 88 4188 0 4101 4 1 3 3 0 8 0 amappl1 80 23634 0 23067 15 0 15 15 0 8 0 amappl 88 32211 0 32027 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 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 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 128 257 0 257 5 5 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 21 0 20 1 0 1 1 0 8 0 aobjpl 72 137 0 11 3 0 3 3 0 8 0 uaddrrnd 24 3631 0 3599 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3631 0 3599 1 0 1 1 0 8 0 vmmpekpl 168 29703 0 29642 4 0 4 4 0 8 0 vmmpepl 168 233578 0 231452 155 56 99 104 0 357 0 vmsppl 448 3630 0 3599 6 2 4 5 0 8 0 rwobjpl 56 69722 0 62518 109 5 104 105 0 8 0 pdppl 4096 7269 0 7198 157 86 71 83 0 8 0 pvpl 32 18724 0 0 153 3 150 150 0 265 0 pmappl 248 3630 0 3599 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 600 0 235 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(fffffd806deb8918,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806deb8908,1) at rw_enter+0x122 rrw_enter(fffffd806deb8908,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806b8b47a0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806b8b47a0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806b8b47a0,ffff800011a26080,1f,0,1,db8e4c8f896e86b,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd80685a98f0) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff815ff3a0,2902,8000,ffffffff8290c0d0,ffff8000317a9a60) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000317a9850) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806de82eb8,ffff8000317a9a60,0,fffffd807f7d3340) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806c004430,ffff8000317a9a60,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff800031984030,3,ffff8000317a9a60,0,ffff8000317a9b20) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff800031984030,ffff8000317a9bd0,ffff8000317a9b20) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff8000317a9bd0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000317a9bd0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfd30fb81b70, 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 nsecuptime() at nsecuptime+0xb sys/kern/kern_tc.c:254 lapic_clockintr(0,0) at lapic_clockintr+0x51 sys/arch/amd64/amd64/lapic.c:489 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a 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: -8