*cpu0: uvm_fault(0xfffffd807eaabd00, 0x8, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffbe170, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800021180240 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff800021180170 r9 0 r10 0xf56b0c91aab28df0 r11 0xaff7256ef6b2cc2d r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8142b50c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff8000211801c0 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{1}> show proc PROC (sshd) pid=81054 stat=onproc flags process=12 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff67f0,0xffff8000ffff6020 process=0xffff80002116fa40 user=0xffff80002117b000, vmspace=0xfffffd800873ea10 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 2299 413277 25012 32767 2 0x10 syz-executor.7 27957 170252 2236 32767 2 0x10 syz-executor.6 27957 482894 2236 32767 7 0x4000010 syz-executor.6 72300 426875 83034 32767 2 0x490 syz-executor.5 83034 446604 21690 0 3 0x82 wait syz-executor.5 86935 428205 72758 32767 2 0x10 syz-executor.1 72758 185328 21690 0 3 0x82 wait syz-executor.1 27043 450935 86377 32767 2 0x10 syz-executor.3 86377 166720 21690 0 3 0x82 wait syz-executor.3 34074 191164 0 0 3 0x14200 bored sosplice 25012 519188 46390 32767 3 0x90 nanoslp syz-executor.7 46390 336143 21690 0 3 0x82 wait syz-executor.7 2236 459735 31029 32767 3 0x90 nanoslp syz-executor.6 78774 328728 61751 32767 2 0x490 syz-executor.4 31029 279321 21690 0 3 0x82 wait syz-executor.6 61751 288404 21690 0 3 0x82 wait syz-executor.4 41414 239068 33419 32767 2 0x10 syz-executor.2 33419 159333 21690 0 3 0x82 wait syz-executor.2 97847 13726 2578 32767 2 0x10 syz-executor.0 2578 488098 21690 0 3 0x82 wait syz-executor.0 21690 450090 44515 0 2 0x82 syz-fuzzer 21690 226003 44515 0 2 0x4000482 syz-fuzzer 21690 400801 44515 0 3 0x4000082 thrsleep syz-fuzzer 21690 189442 44515 0 3 0x4000082 thrsleep syz-fuzzer 21690 437430 44515 0 2 0x4000082 syz-fuzzer 21690 310564 44515 0 3 0x4000082 thrsleep syz-fuzzer 21690 442394 44515 0 3 0x4000082 thrsleep syz-fuzzer 21690 438226 44515 0 3 0x4000082 thrsleep syz-fuzzer 21690 489846 44515 0 3 0x4000082 thrsleep syz-fuzzer 21690 70213 44515 0 3 0x4000082 thrsleep syz-fuzzer 44515 14555 45373 0 3 0x10008a sigsusp ksh *45373 81054 21789 0 7 0x12 sshd 82581 72685 1 0 3 0x100083 ttyin getty 21789 4276 1 0 3 0x88 kqread sshd 90985 162780 24221 73 3 0x1100090 kqread syslogd 24221 483577 1 0 3 0x100082 netio syslogd 33809 377958 1 0 3 0x100080 kqread resolvd 86990 507710 40352 77 3 0x100092 kqread dhcpleased 62148 379399 40352 77 3 0x100092 kqread dhcpleased 40352 452987 1 0 3 0x80 kqread dhcpleased 78337 97854 0 0 3 0x14200 bored smr 29614 409236 0 0 2 0x14200 zerothread 84985 147971 0 0 3 0x14200 aiodoned aiodoned 86238 9993 0 0 3 0x14200 syncer update 88630 289601 0 0 3 0x14200 cleaner cleaner 76446 51222 0 0 3 0x14200 reaper reaper 38426 311160 0 0 3 0x14200 pgdaemon pagedaemon 23095 60475 0 0 3 0x14200 bored viomb 17329 48785 0 0 3 0x40014200 acpi0 acpi0 77843 518071 0 0 3 0x40014200 idle1 64573 491348 0 0 3 0x14200 bored softnet 68173 215882 0 0 3 0x14200 bored systqmp 52755 269290 0 0 3 0x14200 bored systq 23530 92454 0 0 2 0x40014200 softclock 90266 424478 0 0 3 0x40014200 idle0 1 356153 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807e7bbcb0) #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_lower+0x77c sys/uvm/uvm_fault.c:1496 #5 uvm_fault+0x248 #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 27957 (syz-executor.6) thread 0xffff80002116bce0 (482894) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82b1e3d0) #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 (0xfffffd8068a21098) #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 27043 (syz-executor.3) thread 0xffff8000fffeed30 (450935) exclusive rrwlock inode r = 0 (0xfffffd8068a21d58) #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 (0xfffffd8067d28e70) #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 Process 97847 (syz-executor.0) thread 0xffff80002116ba40 (13726) exclusive rrwlock inode r = 0 (0xfffffd8068a214d8) #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 vn_closefile+0xc6 vn_close sys/kern/vfs_vnops.c:298 [inline] #5 vn_closefile+0xc6 sys/kern/vfs_vnops.c:624 #6 fdrop+0xc7 sys/kern/kern_descrip.c:1279 #7 closef+0x11c sys/kern/kern_descrip.c:1263 #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 Process 45373 (sshd) thread 0xffff8000ffff6550 (81054) exclusive rwlock amaplk r = 0 (0xfffffd805c76bb38) #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 (0xfffffd800873ea28) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1762 #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 &pmap->pm_mtx r = 0 (0xfffffd807e7bbcb0) #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_lower+0x77c sys/uvm/uvm_fault.c:1496 #5 uvm_fault+0x248 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 6410K 6419K 78643K 11301 0 pcb 13 10K 12K 78643K 15 0 rtable 244 6K 7K 78643K 591 0 ifaddr 81 17K 17K 78643K 125 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 68 0 ioctlops 0 0K 2K 78643K 53 0 iov 0 0K 12K 78643K 258 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1271 79K 79K 78643K 1857 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 18 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 386 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 20 73K 113K 78643K 2245 0 sigio 0 0K 0K 78643K 76 0 proc 56 78K 103K 78643K 779 0 subproc 104 6K 6K 78643K 182 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 3483 0 in_multi 99 6K 6K 78643K 186 0 ether_multi 1 0K 0K 78643K 10 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 3K 78643K 1031 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 247 84K 100K 78643K 14983 0 UVM aobj 107 3K 3K 78643K 113 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 53 0 NDP 11 0K 2K 78643K 45 0 temp 124 4730K 4858K 78643K 8754 0 kqueue 12 18K 24K 78643K 176 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 120 248 0 245 5 3 2 3 0 8 1 rtentry 112 189 0 74 4 0 4 4 0 8 0 unpcb 136 1293 0 1280 13 10 3 5 0 8 2 syncache 296 16 0 16 4 4 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 736 2429 0 2417 59 55 4 16 0 8 2 arp 120 31 0 12 1 0 1 1 0 8 0 ipq 40 3 0 3 1 0 1 1 0 8 1 ipqe 40 91 0 91 1 0 1 1 0 8 1 inpcb 312 3543 0 3535 31 27 4 11 0 8 2 nd6 48 53 0 25 1 0 1 1 0 8 0 kcovpl 48 14 0 6 1 0 1 1 0 8 0 rttmrq 48 4 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 793 0 308 31 0 31 31 0 8 0 art_table 32 794 0 308 5 0 5 5 0 8 0 art_node 16 188 0 83 1 0 1 1 0 8 0 sysvmsgpl 40 23 0 2 1 0 1 1 0 8 0 semapl 112 384 0 374 1 0 1 1 0 8 0 shmpl 112 110 0 6 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4470 0 3035 91 0 91 91 0 8 0 ffsino 272 4470 0 3035 97 0 97 97 0 8 0 nchpl 144 7595 0 5956 63 0 63 63 0 8 0 uvmvnodes 80 4661 0 0 96 0 96 96 0 8 0 vnodes 224 4661 0 0 275 0 275 275 0 8 0 namei 1024 27198 0 27196 2 1 1 2 0 8 0 percpumem 16 46 0 6 1 0 1 1 0 8 0 kstatmem 264 34 0 12 2 0 2 2 0 8 0 scxspl 216 25576 0 25576 14 13 1 5 0 8 1 plimitpl 152 566 0 544 6 4 2 2 0 8 1 sigapl 424 2509 0 2461 7 0 7 7 0 8 0 futexpl 64 18238 0 18238 1 0 1 1 0 8 1 knotepl 120 586 0 0 17 0 17 17 0 8 0 kqueuepl 216 467 0 459 5 4 1 3 0 8 0 pipepl 336 590 0 562 15 12 3 6 0 8 0 fdescpl 496 2494 0 2463 6 0 6 6 0 8 0 filepl 152 17097 0 16862 38 24 14 17 0 8 4 lockfpl 104 444 0 442 2 1 1 2 0 8 0 lockfspl 48 87 0 85 1 0 1 1 0 8 0 sessionpl 144 29 0 13 1 0 1 1 0 8 0 pgrppl 48 181 0 165 1 0 1 1 0 8 0 ucredpl 96 3358 0 3340 1 0 1 1 0 8 0 zombiepl 144 2463 0 2461 1 0 1 1 0 8 0 processpl 1064 2509 0 2461 4 0 4 4 0 8 0 procpl 672 6754 0 6696 12 5 7 8 0 8 1 sosppl 168 36 0 36 6 6 0 1 0 8 0 sockpl 480 5101 0 5078 95 84 11 28 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 23 0 0 2 0 2 2 0 8 0 mcl9k 9216 14 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 29 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 154 0 0 17 0 17 17 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 466 0 0 25 0 25 25 0 8 0 bufpl 288 7408 0 1077 453 0 453 453 0 8 0 anonpl 24 481921 0 469148 142 30 112 113 0 186 23 amapchunkpl 152 43464 0 42887 46 10 36 37 0 158 8 amappl16 200 6420 0 6030 34 11 23 33 0 8 0 amappl15 192 1018 0 1012 1 0 1 1 0 8 0 amappl14 184 325 0 318 1 0 1 1 0 8 0 amappl13 176 503 0 498 1 0 1 1 0 8 0 amappl12 168 5 0 3 2 1 1 1 0 8 0 amappl11 160 86 0 71 1 0 1 1 0 8 0 amappl10 152 626 0 621 1 0 1 1 0 8 0 amappl9 144 564 0 561 1 0 1 1 0 8 0 amappl8 136 722 0 646 3 0 3 3 0 8 0 amappl7 128 147 0 134 1 0 1 1 0 8 0 amappl6 120 315 0 290 2 1 1 2 0 8 0 amappl5 112 2369 0 2351 2 1 1 2 0 8 0 amappl4 104 1187 0 1158 2 1 1 2 0 8 0 amappl3 96 6999 0 6957 2 0 2 2 0 8 0 amappl2 88 3246 0 3176 3 1 2 3 0 8 0 amappl1 80 61557 0 60955 19 3 16 19 0 8 0 amappl 88 14379 0 14224 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 128 253 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 72 112 0 6 2 0 2 2 0 8 0 uaddrrnd 24 2494 0 2463 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2494 0 2463 1 0 1 1 0 8 0 vmmpekpl 168 24225 0 24166 3 0 3 3 0 8 0 vmmpepl 168 246117 0 243780 149 21 128 135 0 357 3 vmsppl 368 2493 0 2463 4 0 4 4 0 8 0 rwobjpl 56 66772 0 60699 88 0 88 88 0 8 0 pdppl 4096 4995 0 4926 171 90 81 89 0 8 12 pvpl 32 1026212 0 1008762 326 111 215 255 0 265 56 pmappl 248 2493 0 2463 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1015 0 187 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82962ff0) 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_write_1(3f8,0,20) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,20) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,20) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(20) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(2d) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff8264aaf1) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825fc1a8) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff80002e39ff40,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff80002e39ff40) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff80002e3a0040) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 end trace frame: 0xffff80002e3a00b0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82962ff0) 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_write_1(3f8,0,20) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,20) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,20) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(20) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(2d) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff8264aaf1) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825fc1a8) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff80002e39ff40,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff80002e39ff40) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff80002e3a0040) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd8067947dc0,ffff80002e3a00d8,8,fffffd807f7d7420) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8067947dc0,ffff800021157400,78,0,1,5f13664b68147ad0,ffff80002e3a0200,fffffd8067947dc0,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:330 ufs_symlink(ffff80002e3a0200) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1398 VOP_SYMLINK(fffffd80679470a0,ffff80002e3a0380,ffff80002e3a03b0,ffff80002e3a02b0,ffff800021157400) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:442 dosymlinkat(ffff80002116bce0,200000c0,3,20d06ff8) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1804 syscall(ffff80002e3a0530) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3a0530) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2179cfc4110, 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: 0x7f7ffffbe170, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffbe170, count: -1