witness: lock order reversal: 1st 0xfffffd806bfcd4a8 vmmaplk (&map->lock) 2nd 0xfffffd806deda978 inode (&ip->i_lock) lock order [1] vmmaplk (&map->lock) -> [2] inode (&ip->i_lock) #0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 #1 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #2 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #3 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #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+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 lock order [2] inode (&ip->i_lock) -> [1] vmmaplk (&map->lock) #0 rw_do_enter_read+0x9d sys/kern/kern_rwlock.c:352 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1864 #2 uvm_fault_check+0x4b sys/uvm/uvm_fault.c:732 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:668 #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+0xbd4 sys/kern/kern_exec.c:468 #14 start_init+0x3c6 sys/kern/init_main.c:716 #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(fffffd806deda978,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806deda960,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806deda960,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805f8c71d8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f8c71d8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vn_rdwr(0,fffffd805f8c71d8,ffff800011a26480,c,0,1,ac5d7d503e717e74,0,ffff800000b2a000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd805ee23268) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff814caab0,2902,8000,ffffffff813cd180,ffff80003c1a09c0) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80003c1a07b0) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd807b05ade0,ffff80003c1a09c0,0,fffffd807f7d32d8) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bcaf1e0,ffff80003c1a09c0,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff800038d6f1f0,4,ffff80003c1a09c0,0,ffff80003c1a0a80) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff800038d6f1f0,ffff80003c1a0b30,ffff80003c1a0a80) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff80003c1a0b30) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c1a0b30) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3e7d740ad10, count: -16 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c1a0290 rbx 0xfffffd800433b360 rdx 0 rcx 0xffff800038d6f1f0 rax 0xffffffff834e3ff0 cpu_info_full_primary+0x1ff0 r8 0xffff80003c1a0170 r9 0x8080808080808080 r10 0x3a1931d2201f439e r11 0xc80576609216c822 r12 0 r13 0xfffffd8003b53f00 r14 0x3 r15 0xffffffff rip 0xffffffff8239cdf5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c1a0280 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=478162 pid=49401 tcnt=3 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=0xffff800038d6ece0,0xffff800038d6f710 process=0xffff80003c760b68 user=0xffff80003c19b000, vmspace=0xfffffd806bfcd3a8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49401 90681 1966 0 3 0x80 nanoslp syz-executor *49401 478162 1966 0 7 0x4000000 syz-executor 49401 329704 1966 0 2 0x4000000 syz-executor 49739 443561 23739 0 2 0 syz-executor 49739 25898 23739 0 3 0x4000080 msgwait syz-executor 49739 259940 23739 0 3 0x4000080 fsleep syz-executor 99657 516263 18834 0 3 0x80 nanoslp syz-executor 99657 92227 18834 0 3 0x4000000 smrbar syz-executor 99657 46943 18834 0 3 0x4000080 fsleep syz-executor 97610 181852 95327 0 2 0 syz-executor 97610 64415 95327 0 3 0x4000080 sbwait syz-executor 97610 350729 95327 0 3 0x4000080 kqsel syz-executor 97610 394004 95327 0 3 0x4000080 fsleep syz-executor 33495 287971 88270 0 3 0x80 nanoslp syz-executor 33495 280974 88270 0 3 0x4000080 ttyout syz-executor 33495 62151 88270 0 3 0x4000080 ttyout syz-executor 33495 159730 88270 0 3 0x4000080 fsleep syz-executor 85344 130388 398 0 3 0x80 nanoslp syz-executor 85344 447229 398 0 3 0x4000080 kqread syz-executor 85344 520299 398 0 3 0x4000080 fsleep syz-executor 85344 2610 398 0 3 0x4000080 fsleep syz-executor 98081 164751 0 0 3 0x14280 nfsidl nfsio 14098 144352 0 0 3 0x14280 nfsidl nfsio 27772 250278 0 0 3 0x14280 nfsidl nfsio 10473 164978 0 0 3 0x14280 nfsidl nfsio 72625 95360 0 0 3 0x14280 nfsidl nfsio 80064 501173 0 0 3 0x14280 nfsidl nfsio 66552 457277 0 0 3 0x14280 nfsidl nfsio 33066 107750 0 0 3 0x14280 nfsidl nfsio 76536 276474 0 0 3 0x14280 nfsidl nfsio 19247 92765 0 0 3 0x14280 nfsidl nfsio 11149 143853 0 0 3 0x14280 nfsidl nfsio 7773 271474 0 0 3 0x14280 nfsidl nfsio 99597 132886 0 0 3 0x14280 nfsidl nfsio 54838 480057 0 0 3 0x14280 nfsidl nfsio 98995 275564 0 0 3 0x14280 nfsidl nfsio 92134 453899 0 0 3 0x14280 nfsidl nfsio 31717 35244 0 0 3 0x14280 nfsidl nfsio 49969 171202 0 0 3 0x14280 nfsidl nfsio 9729 299392 0 0 3 0x14280 nfsidl nfsio 31261 463788 0 0 3 0x14280 nfsidl nfsio 10721 380329 1 0 3 0x100083 ttyin getty 54116 195923 0 0 3 0x14200 bored sosplice 79024 437454 98562 0 3 0x82 nanoslp syz-executor 88270 11056 98562 0 3 0x82 nanoslp syz-executor 398 461454 98562 0 3 0x82 nanoslp syz-executor 23739 462591 98562 0 3 0x82 nanoslp syz-executor 8939 201683 98562 0 7 0x2 syz-executor 1966 344249 98562 0 3 0x82 nanoslp syz-executor 18834 222293 98562 0 3 0x82 nanoslp syz-executor 95327 472790 98562 0 3 0x82 nanoslp syz-executor 98562 161453 93599 0 3 0x82 kqread syz-executor 93599 253941 91400 0 3 0x10008a sigsusp ksh 91400 84213 60898 0 3 0x98 kqread sshd-session 60898 523808 34503 0 3 0x92 kqread sshd-session 34503 118675 1 0 3 0x88 kqread sshd 41659 312969 27587 74 3 0x1100092 bpf pflogd 27587 450700 1 0 3 0x80 sbwait pflogd 26286 396124 26547 73 3 0x1100090 kqread syslogd 26547 518471 1 0 3 0x100082 sbwait syslogd 61604 266412 1 0 3 0x100080 kqread resolvd 13463 370034 21227 77 3 0x100092 kqread dhcpleased 18725 305386 21227 77 3 0x100092 kqread dhcpleased 21227 413246 1 0 3 0x80 kqread dhcpleased 69844 116333 0 0 3 0x14200 bored smr 20094 139751 0 0 2 0x14200 zerothread 63503 218671 0 0 3 0x14200 aiodoned aiodoned 61981 440833 0 0 3 0x14200 syncer update 25523 406931 0 0 3 0x14200 cleaner cleaner 27522 496334 0 0 3 0x14200 reaper reaper 72010 97254 0 0 3 0x14200 pgdaemon pagedaemon 2071 215520 0 0 3 0x14200 bored viomb 6650 186446 0 0 3 0x40014200 acpi0 acpi0 61789 340834 0 0 3 0x40014200 idle1 48502 215925 0 0 3 0x14200 bored softnet3 50113 138597 0 0 3 0x14200 bored softnet2 28580 348109 0 0 3 0x14200 bored softnet1 32118 33694 0 0 3 0x14200 bored softnet0 66879 222787 0 0 3 0x14200 bored systqmp 85676 218143 0 0 3 0x14200 bored systq 80797 220155 0 0 3 0x14200 tmoslp softclockmp 74647 498886 0 0 3 0x40014200 tmoslp softclock 74147 278761 0 0 3 0x40014200 idle0 1 292738 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 49401 (syz-executor) thread 0xffff800038d6f1f0 (478162) shared rwlock vmmaplk r = 0 (0xfffffd806bfcd4a8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:172 #3 physio+0x277 sys/kern/kern_physio.c:139 #4 spec_read+0x155 sys/kern/spec_vnops.c:215 #5 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #6 vn_read+0x17b sys/kern/vfs_vnops.c:369 #7 dofilereadv+0x230 sys/kern/sys_generic.c:252 #8 sys_readv+0xd8 sys/kern/sys_generic.c:199 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff836710f8) #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+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 99657 (syz-executor) thread 0xffff8000ffff8538 (92227) exclusive rwlock clonelk r = 0 (0xffffffff834c6f28) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 if_clone_destroy+0x67 #3 tun_dev_close+0x1dc sys/net/if_tun.c:529 #4 spec_close+0x412 #5 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #7 fdrop+0x126 sys/kern/kern_descrip.c:1265 #8 closef+0x192 sys/kern/kern_descrip.c:1249 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 Process 97610 (syz-executor) thread 0xffff800038d6c2b8 (64415) exclusive rwlock sbufrcv r = 0 (0xffff800010fdee60) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sblock+0xb7 sys/kern/uipc_socket2.c:537 #3 soreceive+0x28e sys/kern/uipc_socket.c:876 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #5 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:963 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 11096K 11405K 166960K 12058 0 pcb 19 16K 21K 166960K 271 0 rtable 175 6K 7K 166960K 406 0 pf 41 18K 20K 166960K 64 0 ifaddr 41 6K 8K 166960K 60 0 ifgroup 68 2K 2K 166960K 80 0 sysctl 3 1K 2K 166960K 4 0 counters 70 37K 37K 166960K 78 0 ioctlops 0 0K 4K 166960K 1619 0 iov 2 20K 22K 166960K 30 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1396 88K 88K 166960K 1793 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 29 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 93K 166960K 595 0 sigio 0 0K 0K 166960K 7 0 proc 75 103K 128K 166960K 591 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 257 0 in_multi 80 5K 7K 166960K 124 0 ether_multi 1 0K 0K 166960K 3 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 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 558 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 236 73K 78K 166960K 7240 0 UVM aobj 75 3K 3K 166960K 77 0 pinsyscall 42 84K 104K 166960K 1695 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 33 0 NDP 16 0K 2K 166960K 37 0 temp 52 6893K 6989K 166960K 15317 0 kqueue 16 26K 34K 166960K 143 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 73 0 67 1 0 1 1 0 8 0 rtentry 112 120 0 43 4 0 4 4 0 8 0 unpcb 144 697 0 671 6 4 2 6 0 8 1 syncache 336 6 0 6 1 1 0 1 0 8 0 tcpcb 808 206 0 200 8 5 3 8 0 8 2 arp 120 19 0 6 1 0 1 1 0 8 0 inpcb 376 797 0 784 17 9 8 15 0 8 6 nd6 136 27 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 2 0 2 1 0 1 1 0 8 1 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 7 0 6 2 1 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 pfstitem 24 60 0 11 1 0 1 1 0 8 0 pfstkey 128 60 0 11 2 0 2 2 0 8 0 pfstate 376 60 0 11 6 0 6 6 0 8 0 pfrule 1344 58 0 52 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 520 0 139 29 0 29 29 0 8 4 art_table 32 521 0 139 4 0 4 4 0 8 0 art_node 16 118 0 51 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 25 0 15 1 0 1 1 0 8 0 shmpl 112 74 0 2 3 0 3 3 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2446 0 942 95 0 95 95 0 8 0 ffsino 280 2446 0 942 109 0 109 109 0 8 0 nchpl 144 3332 0 1637 64 0 64 64 0 8 0 uvmvnodes 80 2789 0 0 57 0 57 57 0 8 0 vnodes 216 2789 0 0 155 0 155 155 0 8 0 namei 1024 11768 0 11768 1 0 1 1 0 8 1 percpumem 16 53 0 4 1 0 1 1 0 8 0 kstatmem 264 38 0 8 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 11790 0 11790 3 2 1 2 1 8 1 plimitpl 152 148 0 130 1 0 1 1 0 8 0 sigapl 424 919 0 849 9 1 8 8 0 8 0 futexpl 64 7945 0 7939 1 0 1 1 0 8 0 knotepl 120 354 0 0 11 0 11 11 0 8 0 kqueuepl 216 289 0 275 4 1 3 3 0 8 1 pipepl 328 186 0 153 6 0 6 6 0 8 3 fdescpl 504 880 0 849 5 0 5 5 0 8 0 filepl 152 5931 0 5681 15 2 13 15 0 8 3 lockfpl 104 255 0 253 1 0 1 1 0 8 0 lockfspl 48 90 0 88 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 104 743 0 729 1 0 1 1 0 8 0 zombiepl 144 850 0 849 1 0 1 1 0 8 0 processpl 1168 919 0 849 7 1 6 6 0 8 0 procpl 648 1706 0 1621 8 0 8 8 0 8 0 srpgc 96 12 0 12 1 0 1 1 0 8 1 sosppl 168 7 0 7 2 1 1 1 0 8 1 sockpl 688 1579 0 1534 20 10 10 16 0 8 5 mcl64k 65536 2 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 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 74 0 0 2 0 2 2 0 8 0 mbufpl 256 299 0 0 18 0 18 18 0 8 0 bufpl 280 4154 0 140 287 0 287 287 0 8 0 anonpl 24 153872 0 150414 60 5 55 55 0 185 19 amapchunkpl 152 22936 0 22412 28 2 26 27 0 158 3 amappl16 200 3120 0 3080 25 11 14 15 0 8 9 amappl15 192 10 0 9 1 0 1 1 0 8 0 amappl14 184 116 0 104 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1527 0 1496 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 108 0 95 1 0 1 1 0 8 0 amappl6 120 184 0 181 1 0 1 1 0 8 0 amappl5 112 127 0 116 1 0 1 1 0 8 0 amappl4 104 328 0 308 1 0 1 1 0 8 0 amappl3 96 4383 0 4264 4 0 4 4 0 8 0 amappl2 88 669 0 606 2 0 2 2 0 8 0 amappl1 80 9845 0 9270 14 1 13 14 0 8 0 amappl 88 6814 0 6635 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 0 1 1 0 8 1 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 0 1 1 0 8 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 76 0 2 2 0 2 2 0 8 0 uaddrrnd 24 880 0 849 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 880 0 849 1 0 1 1 0 8 0 vmmpekpl 168 9097 0 9052 3 0 3 3 0 8 0 vmmpepl 168 60613 0 58709 97 3 94 95 0 357 4 vmsppl 456 879 0 849 5 1 4 5 0 8 0 rwobjpl 64 22019 0 18196 65 0 65 65 0 8 0 pdppl 4096 1767 0 1698 103 32 71 85 0 8 2 pvpl 32 15818 0 0 130 2 128 129 0 265 0 pmappl 248 879 0 849 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 299 0 41 8 0 8 8 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(fffffd806deda978,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806deda960,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806deda960,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805f8c71d8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f8c71d8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vn_rdwr(0,fffffd805f8c71d8,ffff800011a26480,c,0,1,ac5d7d503e717e74,0,ffff800000b2a000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd805ee23268) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff814caab0,2902,8000,ffffffff813cd180,ffff80003c1a09c0) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80003c1a07b0) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd807b05ade0,ffff80003c1a09c0,0,fffffd807f7d32d8) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bcaf1e0,ffff80003c1a09c0,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff800038d6f1f0,4,ffff80003c1a09c0,0,ffff80003c1a0a80) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff800038d6f1f0,ffff80003c1a0b30,ffff80003c1a0a80) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff80003c1a0b30) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c1a0b30) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3e7d740ad10, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029b5bff0) 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(ffffffff83670ef0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83670ef0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80002a4dc590) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a4dc590) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x718bfa8ab7d0, count: -6