witness: lock order reversal: 1st 0xfffffd806ab029d8 vmmaplk (&map->lock) 2nd 0xfffffd806bea25f0 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(fffffd806bea25f0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bea25e0,1) at rw_enter+0x122 rrw_enter(fffffd806bea25e0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806aaec0d8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806aaec0d8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806aaec0d8,ffff800011a26480,dc,0,1,930b96d7e67eab70,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd8074b0c478) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff82a27880,2902,8000,ffffffff81d8fc90,ffff8000371d7e10) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000371d7c00) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e601d08,ffff8000371d7e10,0,fffffd807f7d3138) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bf8c690,ffff8000371d7e10,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff80002a04e530,3,ffff8000371d7e10,0,ffff8000371d7ed0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff80002a04e530,ffff8000371d7f80,ffff8000371d7ed0) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff8000371d7f80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371d7f80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa25e94ac090, count: -16 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff8000371d76c0 rbx 0xfffffd80042c7020 rdx 0xffff80000128d140 rcx 0xffff80002a04e530 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff8000371d75a0 r9 0x8080808080808080 r10 0xdc4262e5fe231bad r11 0xc1e02a1f9b6e7122 r12 0 r13 0xfffffd8003adee00 r14 0x3 r15 0xffffffff rip 0xffffffff81325f45 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371d76b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=50429 pid=31767 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=0xffff80002a04f460,0xffffffff8361ed48 process=0xffff8000fffe9b30 user=0xffff8000371d3000, vmspace=0xfffffd806ab028e0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 31767 257852 41470 0 2 0 syz-executor *31767 50429 41470 0 7 0x4000000 syz-executor 6006 167693 72192 0 2 0 syz-executor 6006 250409 72192 0 3 0x4000080 sbwait syz-executor 91384 220458 53391 0 2 0x480 syz-executor 91384 509053 53391 0 3 0x4000080 fifow syz-executor 91384 443771 53391 0 3 0x4000080 fsleep syz-executor 83622 79161 48218 0 3 0x80 nanoslp syz-executor 83622 131328 48218 0 3 0x4000080 fifor syz-executor 83622 225689 48218 0 3 0x4000080 fsleep syz-executor 18386 271133 15547 0 7 0 syz-executor 18386 151616 15547 0 3 0x4000080 netacc syz-executor 18386 515993 15547 0 3 0x4000080 fsleep syz-executor 67120 256315 0 0 3 0x14200 acct acct 21685 476519 1 0 3 0x100083 ttyin getty 6240 259995 0 0 3 0x14280 nfsidl nfsio 41633 17085 0 0 3 0x14280 nfsidl nfsio 89977 23433 0 0 3 0x14280 nfsidl nfsio 42719 1908 0 0 3 0x14280 nfsidl nfsio 9406 187457 0 0 3 0x14280 nfsidl nfsio 8197 350301 0 0 3 0x14280 nfsidl nfsio 79787 522334 0 0 3 0x14280 nfsidl nfsio 8814 113871 0 0 3 0x14280 nfsidl nfsio 71618 248916 0 0 3 0x14280 nfsidl nfsio 20974 307679 0 0 3 0x14280 nfsidl nfsio 74366 167344 0 0 3 0x14280 nfsidl nfsio 92974 89790 0 0 3 0x14280 nfsidl nfsio 92859 137094 0 0 3 0x14280 nfsidl nfsio 52332 334732 0 0 3 0x14280 nfsidl nfsio 97836 367660 0 0 3 0x14280 nfsidl nfsio 25317 504788 0 0 3 0x14280 nfsidl nfsio 49502 181731 0 0 3 0x14280 nfsidl nfsio 6098 145748 0 0 3 0x14280 nfsidl nfsio 80202 460217 0 0 3 0x14280 nfsidl nfsio 31902 23104 0 0 3 0x14280 nfsidl nfsio 44386 428997 0 0 3 0x14200 bored sosplice 9011 209192 9658 0 3 0x100082 sbwait arp 9658 216957 13759 0 3 0x10008a sigsusp sh 48218 199697 55180 0 2 0x482 syz-executor 41470 245712 55180 0 3 0x82 nanoslp syz-executor 82213 385938 55180 0 3 0x82 wait syz-executor 72192 324214 55180 0 2 0x482 syz-executor 53391 89094 55180 0 3 0x82 nanoslp syz-executor 13759 302660 55180 0 3 0x82 wait syz-executor 15547 56587 55180 0 2 0x482 syz-executor 15108 428373 55180 0 2 0x482 syz-executor 55180 127581 44570 0 3 0x82 kqread syz-executor 44570 240802 17852 0 3 0x10008a sigsusp ksh 17852 344388 25397 0 3 0x98 kqread sshd-session 25397 40597 69852 0 3 0x92 kqread sshd-session 69852 42640 1 0 3 0x88 kqread sshd 30992 357564 54519 74 3 0x1100092 bpf pflogd 54519 36052 1 0 3 0x80 sbwait pflogd 39813 83164 70788 73 3 0x1100090 kqread syslogd 70788 117987 1 0 3 0x100082 sbwait syslogd 728 33361 1 0 3 0x100080 kqread resolvd 95843 130171 87901 77 3 0x100092 kqread dhcpleased 53543 189648 87901 77 3 0x100092 kqread dhcpleased 87901 36712 1 0 3 0x80 kqread dhcpleased 92987 118155 0 0 3 0x14200 bored smr 63025 219889 0 0 3 0x14200 pgzero zerothread 18516 508823 0 0 3 0x14200 aiodoned aiodoned 32840 423123 0 0 3 0x14200 syncer update 40628 331311 0 0 3 0x14200 cleaner cleaner 68397 414469 0 0 3 0x14200 reaper reaper 9509 242448 0 0 3 0x14200 pgdaemon pagedaemon 45477 154896 0 0 3 0x14200 bored viomb 82156 403705 0 0 3 0x40014200 acpi0 acpi0 43084 327082 0 0 3 0x40014200 idle1 58901 332875 0 0 3 0x14200 bored softnet3 86184 413997 0 0 3 0x14200 bored softnet2 68399 221202 0 0 3 0x14200 bored softnet1 84303 182256 0 0 3 0x14200 bored softnet0 58618 267324 0 0 3 0x14200 bored systqmp 25651 252965 0 0 3 0x14200 bored systq 47261 189804 0 0 3 0x14200 tmoslp softclockmp 68292 246887 0 0 2 0x40014200 softclock 36299 473562 0 0 3 0x40014200 idle0 1 247855 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 31767 (syz-executor) thread 0xffff80002a04e530 (50429) shared rwlock vmmaplk r = 0 (0xfffffd806ab029d8) #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 (0xffffffff83623fc8) #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 10213 11212K 11643K 166960K 12931 0 pcb 17 15K 17K 166960K 318 0 rtable 162 6K 7K 166960K 435 0 pf 42 19K 19K 166960K 75 0 ifaddr 36 5K 7K 166960K 58 0 ifgroup 59 2K 2K 166960K 84 0 sysctl 3 1K 1K 166960K 5 0 counters 68 36K 36K 166960K 82 0 ioctlops 0 0K 4K 166960K 1557 0 iov 0 0K 16K 166960K 59 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1487 93K 94K 166960K 2457 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 44 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 19 69K 93K 166960K 1221 0 sigio 0 0K 0K 166960K 29 0 proc 72 91K 128K 166960K 669 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 2 0K 0K 166960K 192 0 in_multi 63 4K 6K 166960K 129 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 674 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 257 73K 87K 166960K 13277 0 UVM aobj 49 2K 2K 166960K 55 0 pinsyscall 45 90K 106K 166960K 2347 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 86 0 NDP 15 0K 1K 166960K 38 0 temp 78 6828K 6900K 166960K 35295 0 kqueue 14 22K 26K 166960K 179 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 120 148 0 144 3 0 3 3 0 8 2 rtentry 112 123 0 55 4 0 4 4 0 8 0 unpcb 144 1136 0 1112 12 6 6 6 0 8 5 syncache 336 12 0 12 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 339 0 332 5 4 1 4 0 8 0 arp 120 18 0 5 1 0 1 1 0 8 0 inpcb 336 1459 0 1447 17 13 4 12 0 8 2 nd6 136 30 0 16 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 5 0 3 2 1 1 1 0 8 0 pfstscr 40 4 0 4 2 2 0 1 0 8 0 pffrag 232 5 0 2 1 0 1 1 0 482 0 pffrnode 88 5 0 2 1 0 1 1 0 8 0 pffrent 40 17 0 14 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 pfstitem 24 92 0 24 1 0 1 1 0 8 0 pfstkey 128 99 0 31 3 0 3 3 0 8 0 pfstate 376 95 0 28 7 0 7 7 0 8 0 pfrule 1344 25 0 19 2 0 2 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 544 0 221 26 3 23 26 0 8 1 art_table 32 547 0 221 4 0 4 4 0 8 0 art_node 16 122 0 61 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 8 1 0 1 1 0 8 0 semapl 112 41 0 31 1 0 1 1 0 8 0 shmpl 112 52 0 6 2 0 2 2 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 3517 0 2023 95 0 95 95 0 8 0 ffsino 272 3517 0 2023 101 0 101 101 0 8 0 nchpl 144 5273 0 3583 63 0 63 63 0 8 0 uvmvnodes 80 4357 0 0 89 0 89 89 0 8 0 vnodes 216 4357 0 0 243 0 243 243 0 8 0 namei 1024 18471 0 18471 2 1 1 2 0 8 1 percpumem 16 55 0 7 1 0 1 1 0 8 0 kstatmem 264 42 0 14 2 0 2 2 0 8 0 scsiplug 72 6 0 6 4 3 1 1 0 8 1 scxspl 216 20323 0 20323 10 9 1 8 1 8 1 plimitpl 152 184 0 167 1 0 1 1 0 8 0 sigapl 424 1559 0 1486 9 0 9 9 0 8 0 futexpl 64 17145 0 17142 1 0 1 1 0 8 0 knotepl 120 521 0 0 16 0 16 16 0 8 0 kqueuepl 216 323 0 313 3 2 1 3 0 8 0 pipepl 320 277 0 250 3 0 3 3 0 8 0 fdescpl 496 1516 0 1483 5 0 5 5 0 8 0 filepl 152 10087 0 9824 29 11 18 19 0 8 7 lockfpl 104 795 0 792 5 4 1 4 0 8 0 lockfspl 48 245 0 242 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 56 0 39 1 0 1 1 0 8 0 ucredpl 104 1481 0 1467 1 0 1 1 0 8 0 zombiepl 144 1488 0 1486 1 0 1 1 0 8 0 processpl 1160 1559 0 1486 6 0 6 6 0 8 0 procpl 648 3341 0 3260 8 0 8 8 0 8 0 srpgc 96 8 0 8 4 3 1 1 0 8 1 sosppl 168 5 0 5 1 1 0 1 0 8 0 sockpl 664 2779 0 2739 36 25 11 20 0 8 7 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 150 0 0 19 0 19 19 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 38 0 0 4 0 4 4 0 8 0 mtagpl 96 70 0 0 2 0 2 2 0 8 0 mbufpl 256 426 0 0 26 0 26 26 0 8 0 bufpl 280 7286 0 1111 442 0 442 442 0 8 0 anonpl 24 247521 0 242915 71 30 41 71 0 185 0 amapchunkpl 152 43521 0 42928 40 15 25 36 0 158 1 amappl16 200 5912 0 5883 36 32 4 23 0 8 0 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 137 0 123 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 2169 0 2135 3 1 2 2 0 8 0 amappl11 160 56 0 41 1 0 1 1 0 8 0 amappl10 152 13 0 13 2 2 0 1 0 8 0 amappl9 144 135 0 135 1 1 0 1 0 8 0 amappl8 136 19 0 16 1 0 1 1 0 8 0 amappl7 128 116 0 103 1 0 1 1 0 8 0 amappl6 120 171 0 168 1 0 1 1 0 8 0 amappl5 112 140 0 128 1 0 1 1 0 8 0 amappl4 104 363 0 342 1 0 1 1 0 8 0 amappl3 96 8075 0 7968 3 0 3 3 0 8 0 amappl2 88 1889 0 1800 3 0 3 3 0 8 0 amappl1 80 13039 0 12443 15 0 15 15 0 8 0 amappl 88 12743 0 12552 5 0 5 5 0 92 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 54 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1516 0 1483 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1516 0 1483 1 0 1 1 0 8 0 vmmpekpl 168 14215 0 14182 2 0 2 2 0 8 0 vmmpepl 168 100731 0 98760 105 17 88 103 0 357 2 vmsppl 448 1515 0 1483 6 1 5 5 0 8 0 rwobjpl 56 34205 0 28795 78 1 77 77 0 8 0 pdppl 4096 3039 0 2966 119 46 73 85 0 8 0 pvpl 32 18879 0 0 155 2 153 153 0 265 0 pmappl 248 1515 0 1483 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 435 0 72 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(fffffd806bea25f0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bea25e0,1) at rw_enter+0x122 rrw_enter(fffffd806bea25e0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806aaec0d8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806aaec0d8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd806aaec0d8,ffff800011a26480,dc,0,1,930b96d7e67eab70,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd8074b0c478) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff82a27880,2902,8000,ffffffff81d8fc90,ffff8000371d7e10) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000371d7c00) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e601d08,ffff8000371d7e10,0,fffffd807f7d3138) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bf8c690,ffff8000371d7e10,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff80002a04e530,3,ffff8000371d7e10,0,ffff8000371d7ed0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff80002a04e530,ffff8000371d7f80,ffff8000371d7ed0) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff8000371d7f80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371d7f80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa25e94ac090, 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 __mp_lock(ffffffff83623dc0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83623dc0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff8000367a8e80) at syscall+0xa11 mi_syscall_return sys/sys/syscall_mi.h:206 [inline] syscall(ffff8000367a8e80) at syscall+0xa11 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73c860003f40, count: -6