*cpu0: uvm_fault(0xfffffd8008732e60, 0x8, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffdf8a0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002e37b310 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff80002e37b240 r9 0 r10 0xf8e1c061da364761 r11 0xfd0cf4344a160fb8 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8128750c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff80002e37b290 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{1}> show proc PROC (syz-executor.6) pid=249105 stat=onproc flags process=10 proc=0 pri=80, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021248fc8,0xffffffff82b8a3a8 process=0xffff80002973c870 user=0xffff80002e376000, vmspace=0xfffffd8065fc2a28 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *61765 249105 40393 32767 7 0x10 syz-executor.6 40630 179691 7279 32767 2 0x10 syz-executor.5 40630 16166 7279 32767 3 0x4000090 kqread syz-executor.5 11273 201491 89026 32767 2 0x10 syz-executor.7 20861 394838 68544 32767 2 0x10 syz-executor.4 20861 314181 68544 32767 7 0x4000010 syz-executor.4 74388 57763 2293 32767 2 0x10 syz-executor.2 74388 231304 2293 32767 3 0x4000090 fsleep syz-executor.2 21019 251274 71605 32767 2 0x10 syz-executor.0 71605 389125 91598 0 3 0x82 wait syz-executor.0 68544 270998 71402 32767 3 0x90 nanoslp syz-executor.4 71402 109221 91598 0 3 0x82 wait syz-executor.4 69998 212818 0 0 3 0x14200 bored sosplice 89026 194501 23071 32767 3 0x90 nanoslp syz-executor.7 41593 316636 4913 32767 2 0x10 syz-executor.3 23071 331176 91598 0 3 0x82 wait syz-executor.7 7279 301178 20655 32767 2 0x490 syz-executor.5 40393 244155 67878 32767 3 0x90 nanoslp syz-executor.6 67878 472786 91598 0 3 0x82 wait syz-executor.6 20655 510379 91598 0 3 0x82 wait syz-executor.5 4913 10007 91598 0 3 0x82 wait syz-executor.3 2293 270511 70023 32767 3 0x90 nanoslp syz-executor.2 70023 245831 91598 0 3 0x82 wait syz-executor.2 58061 354082 75754 32767 2 0x490 syz-executor.1 75754 234536 91598 0 3 0x82 wait syz-executor.1 91598 462766 86699 0 3 0x82 thrsleep syz-fuzzer 91598 124403 86699 0 3 0x4000082 nanoslp syz-fuzzer 91598 407002 86699 0 3 0x4000082 thrsleep syz-fuzzer 91598 312848 86699 0 3 0x4000082 kqread syz-fuzzer 91598 338675 86699 0 3 0x4000082 thrsleep syz-fuzzer 91598 220401 86699 0 3 0x4000082 thrsleep syz-fuzzer 91598 449895 86699 0 3 0x4000082 thrsleep syz-fuzzer 91598 38004 86699 0 3 0x4000082 thrsleep syz-fuzzer 91598 196649 86699 0 3 0x4000082 thrsleep syz-fuzzer 86699 46200 75526 0 3 0x10008a sigsusp ksh 75526 101777 45307 0 3 0x9a kqread sshd 9209 32544 1 0 3 0x100083 ttyin getty 45307 491961 1 0 3 0x88 kqread sshd 25503 138647 94872 73 3 0x1100090 kqread syslogd 94872 437959 1 0 3 0x100082 netio syslogd 35154 390118 1 0 3 0x100080 kqread resolvd 36850 259485 38349 77 3 0x100092 kqread dhcpleased 66816 332126 38349 77 3 0x100092 kqread dhcpleased 38349 249000 1 0 3 0x80 kqread dhcpleased 37841 225350 0 0 3 0x14200 bored smr 58141 14783 0 0 2 0x14200 zerothread 58779 18748 0 0 3 0x14200 aiodoned aiodoned 39352 523563 0 0 3 0x14200 syncer update 35783 403899 0 0 3 0x14200 cleaner cleaner 89509 74331 0 0 3 0x14200 reaper reaper 60691 418545 0 0 3 0x14200 pgdaemon pagedaemon 41880 405856 0 0 3 0x14200 bored viomb 56396 136712 0 0 3 0x40014200 acpi0 acpi0 89114 163497 0 0 3 0x40014200 idle1 26149 393604 0 0 3 0x14200 bored softnet 29185 338295 0 0 3 0x14200 bored systqmp 67559 207470 0 0 3 0x14200 bored systq 75574 522078 0 0 2 0x40014200 softclock 38218 480486 0 0 3 0x40014200 idle0 1 321904 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8007041f78) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_enter+0x3ea pmap_enter_pv sys/arch/amd64/amd64/pmap.c:1040 [inline] #3 pmap_enter+0x3ea sys/arch/amd64/amd64/pmap.c:2802 #4 uvm_fault_upper+0x2b1 sys/uvm/uvm_fault.c:1047 #5 uvm_fault+0x164 sys/uvm/uvm_fault.c:610 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80681d23f0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_enter+0x1b8 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_enter+0x1b8 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_enter+0x1b8 sys/arch/amd64/amd64/pmap.c:2691 #4 uvm_fault_upper+0x2b1 sys/uvm/uvm_fault.c:1047 #5 uvm_fault+0x164 sys/uvm/uvm_fault.c:610 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 61765 (syz-executor.6) thread 0xffff800024676fd0 (249105) exclusive rwlock amaplk r = 0 (0xfffffd806aaeb0f0) #0 witness_lock+0x44d #1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:774 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd8065fc2a40) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8007041f78) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_enter+0x3ea pmap_enter_pv sys/arch/amd64/amd64/pmap.c:1040 [inline] #3 pmap_enter+0x3ea sys/arch/amd64/amd64/pmap.c:2802 #4 uvm_fault_upper+0x2b1 sys/uvm/uvm_fault.c:1047 #5 uvm_fault+0x164 sys/uvm/uvm_fault.c:610 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80681d23f0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_enter+0x1b8 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_enter+0x1b8 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_enter+0x1b8 sys/arch/amd64/amd64/pmap.c:2691 #4 uvm_fault_upper+0x2b1 sys/uvm/uvm_fault.c:1047 #5 uvm_fault+0x164 sys/uvm/uvm_fault.c:610 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 20861 (syz-executor.4) thread 0xffff8000212487e8 (314181) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82b0bce0) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x198 sys/kern/kern_synch.c:437 #4 tsleep+0x12c sys/kern/kern_synch.c:158 #5 biowait+0x91 sys/kern/vfs_bio.c:1271 #6 bwrite+0x21b sys/kern/vfs_bio.c:772 #7 VOP_BWRITE+0x4a sys/kern/vfs_vops.c:656 #8 ufs_direnter+0x8fa sys/ufs/ufs/ufs_lookup.c:909 #9 ufs_makeinode+0x4cc sys/ufs/ufs/ufs_vnops.c:1868 #10 ufs_symlink+0x47 sys/ufs/ufs/ufs_vnops.c:1382 #11 VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:442 #12 dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1804 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807d02a5e8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:678 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #9 ufs_makeinode+0xae sys/ufs/ufs/ufs_vnops.c:1830 #10 ufs_symlink+0x47 sys/ufs/ufs/ufs_vnops.c:1382 #11 VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:442 #12 dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1804 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 Process 21019 (syz-executor.0) thread 0xffff80002124b260 (251274) exclusive rrwlock inode r = 0 (0xfffffd807d8b50a8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8063f5a2c0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 6412K 6419K 78643K 11308 0 pcb 13 10K 12K 78643K 15 0 rtable 276 8K 8K 78643K 1115 0 ifaddr 81 16K 16K 78643K 103 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 62 0 ioctlops 0 0K 2K 78643K 201 0 iov 0 0K 28K 78643K 1713 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 2859 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 91 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 2988 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 117K 78643K 9956 0 sigio 0 0K 0K 78643K 2900 0 proc 56 74K 111K 78643K 1196 0 subproc 104 6K 6K 78643K 143 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1999 0 in_multi 99 6K 7K 78643K 295 0 ether_multi 1 0K 0K 78643K 34 0 mrt 3 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 259 1155K 1155K 78643K 259 0 exec 0 0K 2K 78643K 1989 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 390 93K 108K 78643K 130786 0 UVM aobj 131 8K 8K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 204 0 NDP 11 0K 2K 78643K 36 0 temp 125 4711K 4776K 78643K 27802 0 kqueue 13 20K 30K 78643K 822 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 1019 0 1016 14 13 1 3 0 8 0 rtentry 112 174 0 45 4 0 4 4 0 8 0 unpcb 136 24968 0 24953 84 78 6 9 0 8 5 syncache 296 113 0 113 14 13 1 1 0 8 1 tcpqe 32 273 0 273 8 7 1 1 0 8 1 tcpcb 736 4410 0 4401 101 99 2 14 0 8 0 arp 120 26 0 8 1 0 1 1 0 8 0 ipq 40 16 0 15 6 5 1 1 0 8 0 ipqe 40 341 0 340 6 5 1 1 0 8 0 inpcb 312 9102 0 9090 96 90 6 17 0 8 5 rttmr 72 4 0 3 1 0 1 1 0 8 0 ip6q 72 62 0 61 4 3 1 1 0 8 0 ip6af 40 123 0 122 4 3 1 1 0 8 0 nd6 48 60 0 18 1 0 1 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 787 0 179 39 0 39 39 0 8 0 art_table 32 788 0 179 6 0 6 6 0 8 0 art_node 16 173 0 54 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 2981 0 2971 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 14267 0 12808 92 0 92 92 0 8 0 ffsino 272 14267 0 12808 98 0 98 98 0 8 0 nchpl 144 28324 0 26696 62 0 62 62 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 90897 0 90895 4 3 1 2 0 8 0 percpumem 16 43 0 3 1 0 1 1 0 8 0 scxspl 216 78942 0 78942 28 25 3 8 0 8 3 plimitpl 152 1747 0 1725 3 2 1 2 0 8 0 sigapl 424 10234 0 10184 7 1 6 7 0 8 0 futexpl 64 102806 0 102805 2 1 1 1 0 8 0 knotepl 120 798 0 0 17 1 16 17 0 8 0 kqueuepl 216 3017 0 3007 55 54 1 8 0 8 0 pipepl 336 2295 0 2267 56 53 3 13 0 8 0 fdescpl 496 10219 0 10185 7 2 5 6 0 8 0 filepl 152 78839 0 78601 128 111 17 21 0 8 7 lockfpl 104 1125 0 1123 3 2 1 2 0 8 0 lockfspl 48 362 0 360 1 0 1 1 0 8 0 sessionpl 144 26 0 10 1 0 1 1 0 8 0 pgrppl 48 43 0 27 1 0 1 1 0 8 0 ucredpl 96 10264 0 10246 1 0 1 1 0 8 0 zombiepl 144 10185 0 10184 1 0 1 1 0 8 0 processpl 1064 10234 0 10184 5 1 4 4 0 8 0 procpl 672 29957 0 29896 19 12 7 8 0 8 1 sosppl 168 96 0 96 15 14 1 1 0 8 1 sockpl 480 35396 0 35362 588 567 21 35 0 8 16 mcl64k 65536 41 0 0 3 0 3 3 0 8 0 mcl16k 16384 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 14 0 0 1 0 1 1 0 8 0 mcl8k 8192 32 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 344 0 0 23 1 22 23 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1043 0 0 49 0 49 49 0 8 0 bufpl 288 17782 0 11447 453 0 453 453 0 8 0 anonpl 24 2939706 0 2925626 249 144 105 132 0 186 0 amapchunkpl 152 340903 0 340177 127 93 34 49 0 158 0 amappl16 200 29719 0 29343 136 115 21 44 0 8 0 amappl15 192 97 0 91 1 0 1 1 0 8 0 amappl14 184 14 0 12 1 0 1 1 0 8 0 amappl13 176 2550 0 2543 1 0 1 1 0 8 0 amappl12 168 2430 0 2427 2 1 1 1 0 8 0 amappl11 160 1244 0 1230 1 0 1 1 0 8 0 amappl10 152 1291 0 1283 1 0 1 1 0 8 0 amappl9 144 2935 0 2929 1 0 1 1 0 8 0 amappl8 136 1059 0 917 6 0 6 6 0 8 0 amappl7 128 193 0 181 1 0 1 1 0 8 0 amappl6 120 2701 0 2664 2 0 2 2 0 8 0 amappl5 112 9473 0 9453 1 0 1 1 0 8 0 amappl4 104 2365 0 2327 3 1 2 2 0 8 0 amappl3 96 4542 0 4526 1 0 1 1 0 8 0 amappl2 88 4787 0 4736 3 1 2 3 0 8 0 amappl1 80 185116 0 184521 29 15 14 18 0 8 0 amappl 88 129802 0 129561 7 0 7 7 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 128 253 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 10219 0 10185 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10219 0 10185 1 0 1 1 0 8 0 vmmpekpl 168 85317 0 85269 4 1 3 3 0 8 0 vmmpepl 168 935952 0 933348 219 90 129 139 0 357 2 vmsppl 368 10218 0 10185 4 0 4 4 0 8 0 rwobjpl 56 234464 0 227026 121 13 108 110 0 8 0 pdppl 4096 20445 0 20370 208 127 81 91 0 8 6 pvpl 32 4914453 0 4895229 435 261 174 244 0 265 0 pmappl 248 10218 0 10185 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1242 0 375 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff828f6ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,20) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(65) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff82640dbb) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825f0988) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000211f1bd0,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000211f1bd0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff8000211f1cd0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 end trace frame: 0xffff8000211f1d40, count: 0 ddb{0}> trace x86_ipi_db(ffffffff828f6ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,20) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(65) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff82640dbb) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825f0988) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000211f1bd0,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000211f1bd0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff8000211f1cd0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd806877fdb0,ffff8000211f1d68,8,fffffd807f7d8540) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806877fdb0,ffff800021157000,78,0,1,25f7bb43b6b43b45,ffff8000211f1e90,fffffd806877fdb0,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:330 ufs_symlink(ffff8000211f1e90) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1398 VOP_SYMLINK(fffffd8068e77510,ffff8000211f2010,ffff8000211f2040,ffff8000211f1f40,ffff800021157000) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:442 dosymlinkat(ffff8000212487e8,200000c0,3,20d06ff8) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1804 syscall(ffff8000211f21c0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211f21c0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1de4ee0230, count: -21 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xdc: movl $0,%gs:0x538 proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffdf8a0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffdf8a0, count: -1