witness: lock order reversal: 1st 0xfffffd806ce8fd50 vmmaplk (&map->lock) 2nd 0xfffffd806bd722c0 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(fffffd806bd722c0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bd722b0,1) at rw_enter+0x122 rrw_enter(fffffd806bd722b0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80670a9b08,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80670a9b08,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd80670a9b08,ffff800011a26080,1f,0,1,14fbf5542915468f,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd80753939e8) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff81206c10,2902,8000,ffffffff817cdc60,ffff8000371aa480) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000371aa270) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd8071050a80,ffff8000371aa480,0,fffffd807f7d32d8) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806340ead0,ffff8000371aa480,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000ffff47c0,5,ffff8000371aa480,0,ffff8000371aa540) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000ffff47c0,ffff8000371aa5f0,ffff8000371aa540) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff8000371aa5f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371aa5f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x769108f58e0, count: -16 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000371a9d30 rbx 0xfffffd80042c8b58 rdx 0 rcx 0xffff8000ffff47c0 rax 0xffffffff83472ff0 cpu_info_full_primary+0x1ff0 r8 0xffff8000371a9c10 r9 0x8080808080808080 r10 0x60956f63bd2179a9 r11 0x7118a59e82bc8352 r12 0 r13 0xfffffd8003ae0e00 r14 0x3 r15 0xffffffff rip 0xffffffff817ca965 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371a9d20 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=324176 pid=2324 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff5978,0xffff8000ffff42c0 process=0xffff8000fffe9b38 user=0xffff8000371a5000, vmspace=0xfffffd806ce8fc58 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 11247 217083 78240 0 2 0 syz-executor 2324 209941 82447 60928 2 0x10 syz-executor * 2324 324176 82447 60928 7 0x4000010 syz-executor 2324 278930 82447 60928 3 0x4000090 fsleep syz-executor 2324 51130 82447 60928 3 0x4000090 fsleep syz-executor 4574 510933 75123 0 3 0x80 nanoslp syz-executor 4574 514291 75123 0 3 0x4000080 kqpoll syz-executor 4574 265328 75123 0 3 0x4000080 fsleep syz-executor 52521 198744 67621 0 2 0x480 syz-executor 52521 343848 67621 0 3 0x4000080 lockf syz-executor 52521 133767 67621 0 3 0x4000080 lockf syz-executor 52521 25591 67621 0 3 0x4000080 fsleep syz-executor 69759 412937 45044 0 2 0x480 syz-executor 69759 221452 45044 0 3 0x4000080 ttyin syz-executor 69759 407834 45044 0 3 0x4000080 fsleep syz-executor 90742 396254 1 0 3 0x80 nanoslp init 57728 287460 47568 0 2 0x482 syz-executor 45859 438142 0 0 3 0x14280 nfsidl nfsio 950 522395 0 0 3 0x14280 nfsidl nfsio 81716 306619 0 0 3 0x14280 nfsidl nfsio 51083 358479 0 0 3 0x14280 nfsidl nfsio 49254 287496 0 0 3 0x14280 nfsidl nfsio 74246 314406 0 0 3 0x14280 nfsidl nfsio 81579 318662 0 0 3 0x14280 nfsidl nfsio 62629 176988 0 0 3 0x14280 nfsidl nfsio 68755 459377 0 0 3 0x14280 nfsidl nfsio 53248 426906 0 0 3 0x14280 nfsidl nfsio 67369 62909 0 0 3 0x14280 nfsidl nfsio 48199 435083 0 0 3 0x14280 nfsidl nfsio 23566 135943 0 0 3 0x14280 nfsidl nfsio 87005 401333 0 0 3 0x14280 nfsidl nfsio 19822 321207 0 0 3 0x14280 nfsidl nfsio 11300 19442 0 0 3 0x14280 nfsidl nfsio 97155 246406 0 0 3 0x14280 nfsidl nfsio 41192 129518 0 0 3 0x14280 nfsidl nfsio 3930 133154 0 0 3 0x14280 nfsidl nfsio 32543 101021 0 0 3 0x14280 nfsidl nfsio 80463 362579 47568 0 2 0x482 syz-executor 37601 262103 0 0 3 0x14200 bored sosplice 78240 339824 47568 0 3 0x82 nanoslp syz-executor 178 242091 47568 0 3 0x82 nanoslp syz-executor 82447 524216 47568 0 3 0x82 nanoslp syz-executor 75123 36718 47568 0 3 0x82 nanoslp syz-executor 45044 126178 47568 0 7 0x2 syz-executor 67621 457992 47568 0 3 0x82 nanoslp syz-executor 47568 482876 28602 0 3 0x82 kqread syz-executor 28602 82979 39623 0 3 0x10008a sigsusp ksh 39623 447016 68023 0 3 0x98 kqread sshd-session 68023 67630 40727 0 3 0x92 kqread sshd-session 40727 307767 1 0 3 0x88 kqread sshd 88108 42882 54739 74 3 0x1100092 bpf pflogd 54739 479611 1 0 3 0x80 sbwait pflogd 94151 240775 82367 73 3 0x1100090 kqread syslogd 82367 473415 1 0 3 0x100082 sbwait syslogd 21384 504792 1 0 3 0x100080 kqread resolvd 42547 214537 12336 77 3 0x100092 kqread dhcpleased 11581 438488 12336 77 3 0x100092 kqread dhcpleased 12336 501089 1 0 3 0x80 kqread dhcpleased 88793 21167 0 0 3 0x14200 bored smr 46619 178286 0 0 3 0x14200 pgzero zerothread 40230 394095 0 0 3 0x14200 aiodoned aiodoned 71077 314523 0 0 3 0x14200 syncer update 67729 369806 0 0 3 0x14200 cleaner cleaner 21933 328029 0 0 3 0x14200 reaper reaper 69984 256674 0 0 3 0x14200 pgdaemon pagedaemon 9168 197943 0 0 3 0x14200 bored viomb 40035 38813 0 0 3 0x40014200 acpi0 acpi0 18590 321951 0 0 3 0x40014200 idle1 75527 24246 0 0 3 0x14200 bored softnet3 50402 185756 0 0 3 0x14200 bored softnet2 10040 204347 0 0 3 0x14200 bored softnet1 17984 22888 0 0 3 0x14200 bored softnet0 20164 224277 0 0 3 0x14200 bored systqmp 90799 461167 0 0 3 0x14200 bored systq 8362 418664 0 0 3 0x14200 tmoslp softclockmp 70685 498801 0 0 2 0x40014200 softclock 91227 490444 0 0 3 0x40014200 idle0 1 332027 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 2324 (syz-executor) thread 0xffff8000ffff47c0 (324176) shared rwlock vmmaplk r = 0 (0xfffffd806ce8fd50) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10224 11358K 11531K 166960K 12954 0 pcb 18 16K 18K 166960K 542 0 rtable 225 8K 8K 166960K 846 0 pf 38 18K 274K 166960K 143 0 ifaddr 42 7K 8K 166960K 106 0 ifgroup 61 2K 3K 166960K 165 0 sysctl 4 1K 1K 166960K 6 0 counters 64 36K 36K 166960K 130 0 ioctlops 0 0K 4K 166960K 1576 0 iov 0 0K 32K 166960K 148 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1454 91K 92K 166960K 2716 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 168 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 1687 0 sigio 0 0K 0K 166960K 26 0 proc 63 79K 152K 166960K 765 0 subproc 104 6K 6K 166960K 156 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 203 0 in_multi 89 6K 7K 166960K 222 0 ether_multi 1 0K 0K 166960K 12 0 mrt 2 0K 0K 166960K 9 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 664 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 250 73K 81K 166960K 17265 0 UVM aobj 6 2K 2K 166960K 8 0 pinsyscall 42 84K 102K 166960K 2913 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 152 0 NDP 12 0K 2K 166960K 76 0 temp 76 6828K 6915K 166960K 54988 0 kqueue 14 22K 34K 166960K 277 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 120 240 0 235 3 1 2 2 0 8 1 rtentry 112 220 0 119 4 0 4 4 0 8 0 unpcb 144 1141 0 1121 9 3 6 6 0 8 4 syncache 336 12 0 12 4 3 1 1 0 8 1 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 808 675 0 667 12 4 8 8 0 8 7 arp 120 38 0 17 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 336 2399 0 2385 20 13 7 10 0 8 5 nd6 136 45 0 20 2 1 1 2 0 8 0 pkpcb 40 10 0 10 3 2 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1168 20 0 20 2 1 1 1 0 8 1 pfstscr 40 4 0 4 2 2 0 1 0 8 0 pffrag 232 17 0 10 1 0 1 1 0 482 0 pffrnode 88 16 0 10 1 0 1 1 0 8 0 pffrent 40 56 0 49 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 118 0 20 1 0 1 1 0 8 0 pfstkey 128 121 0 23 4 0 4 4 0 8 0 pfstate 376 120 0 22 10 0 10 10 0 8 0 pfrule 1344 24 0 18 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 863 0 450 36 7 29 34 0 8 2 art_table 32 865 0 450 5 0 5 5 0 8 0 art_node 16 198 0 113 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 165 0 155 1 0 1 1 0 8 0 shmpl 112 5 0 2 1 0 1 1 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 4365 0 2850 96 0 96 96 0 8 0 ffsino 272 4365 0 2850 102 0 102 102 0 8 0 nchpl 144 6742 0 6184 63 39 24 63 0 8 0 uvmvnodes 80 5253 0 0 108 0 108 108 0 8 0 vnodes 216 5253 0 0 292 0 292 292 0 8 0 namei 1024 21941 0 21941 3 2 1 2 0 8 1 percpumem 16 79 0 33 1 0 1 1 0 8 0 kstatmem 264 90 0 66 2 0 2 2 0 8 0 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 19855 0 19855 13 9 4 8 1 8 4 plimitpl 152 279 0 261 1 0 1 1 0 8 0 sigapl 424 2013 0 1942 11 2 9 9 0 8 0 futexpl 64 21917 0 21912 1 0 1 1 0 8 0 knotepl 120 573 0 0 17 0 17 17 0 8 0 kqueuepl 216 535 0 525 5 4 1 5 0 8 0 pipepl 320 334 0 306 11 5 6 8 0 8 3 fdescpl 496 1971 0 1939 5 0 5 5 0 8 0 filepl 152 12251 0 11983 28 8 20 20 0 8 8 lockfpl 104 686 0 679 2 1 1 2 0 8 0 lockfspl 48 305 0 301 1 0 1 1 0 8 0 sessionpl 144 36 0 28 1 0 1 1 0 8 0 pgrppl 48 66 0 50 1 0 1 1 0 8 0 ucredpl 104 1892 0 1875 1 0 1 1 0 8 0 zombiepl 144 1945 0 1942 1 0 1 1 0 8 0 processpl 1160 2013 0 1942 7 1 6 6 0 8 0 procpl 648 4419 0 4338 9 1 8 8 0 8 0 srpgc 96 9 0 9 3 2 1 1 0 8 1 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 664 3819 0 3782 29 17 12 15 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 14 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 13 0 0 2 0 2 2 0 8 0 mcl4k 4096 144 0 0 18 0 18 18 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 47 0 0 5 0 5 5 0 8 0 mtagpl 96 47 0 0 2 0 2 2 0 8 0 mbufpl 256 324 0 0 20 0 20 20 0 8 0 bufpl 280 5817 0 108 408 0 408 408 0 8 0 anonpl 24 311398 0 307435 69 21 48 48 0 185 15 amapchunkpl 152 55579 0 55018 33 6 27 27 0 158 3 amappl16 200 7752 0 7719 46 35 11 15 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 146 0 135 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 2686 0 2656 3 1 2 2 0 8 0 amappl11 160 59 0 45 1 0 1 1 0 8 0 amappl10 152 29 0 28 1 0 1 1 0 8 0 amappl9 144 158 0 158 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 128 0 116 1 0 1 1 0 8 0 amappl6 120 211 0 209 1 0 1 1 0 8 0 amappl5 112 163 0 150 1 0 1 1 0 8 0 amappl4 104 372 0 352 1 0 1 1 0 8 0 amappl3 96 10392 0 10292 3 0 3 3 0 8 0 amappl2 88 2343 0 2261 5 2 3 3 0 8 0 amappl1 80 14625 0 14075 15 1 14 14 0 8 0 amappl 88 16648 0 16458 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 0 1 1 0 8 1 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 53 0 52 1 0 1 1 0 8 0 dma256 256 8 0 8 2 1 1 1 0 8 1 dma128 128 255 0 255 2 1 1 1 0 8 1 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 7 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1971 0 1939 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1971 0 1939 1 0 1 1 0 8 0 vmmpekpl 168 17040 0 16994 3 0 3 3 0 8 0 vmmpepl 168 127528 0 125622 111 17 94 96 0 357 3 vmsppl 448 1970 0 1939 6 2 4 5 0 8 0 rwobjpl 56 41567 0 35383 88 0 88 88 0 8 0 pdppl 4096 3949 0 3878 115 42 73 85 0 8 2 pvpl 32 14952 0 0 123 2 121 121 0 265 0 pmappl 248 1970 0 1939 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 457 0 76 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(fffffd806bd722c0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bd722b0,1) at rw_enter+0x122 rrw_enter(fffffd806bd722b0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80670a9b08,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80670a9b08,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd80670a9b08,ffff800011a26080,1f,0,1,14fbf5542915468f,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd80753939e8) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff81206c10,2902,8000,ffffffff817cdc60,ffff8000371aa480) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff8000371aa270) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd8071050a80,ffff8000371aa480,0,fffffd807f7d32d8) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806340ead0,ffff8000371aa480,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000ffff47c0,5,ffff8000371aa480,0,ffff8000371aa540) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000ffff47c0,ffff8000371aa5f0,ffff8000371aa540) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff8000371aa5f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371aa5f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x769108f58e0, 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(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 syscall(ffff80002a0ba0b0) at syscall+0xa11 mi_syscall_return sys/sys/syscall_mi.h:206 [inline] syscall(ffff80002a0ba0b0) at syscall+0xa11 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x779a5e5d0a10, count: -6