*cpu1: uvm_fault(0xfffffd8067bcc468, 0x8, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffca650, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800027b28e00 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff800027b28d30 r9 0 r10 0xacb73b081ee9081a r11 0x25e87db293eaca6d r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8164d50c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff800027b28d80 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{0}> show proc PROC (syz-executor.7) pid=58865 stat=onproc flags process=10 proc=0 pri=17, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffeed28,0xffff8000fffef518 process=0xffff800029337628 user=0xffff800027b23000, vmspace=0xfffffd806ee6e738 estcpu=36, cpticks=0, pctcpu=0.1 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26064 437553 76904 32767 2 0x10 syz-executor.6 39597 348734 94993 32767 2 0x10 syz-executor.2 212 221241 22855 32767 2 0x10 syz-executor.4 212 204801 22855 32767 7 0x4000010 syz-executor.4 10274 514271 22402 32767 2 0x10 syz-executor.5 91664 3225 27193 32767 3 0x90 nanoslp syz-executor.0 91664 354848 27193 32767 3 0x4000090 fsleep syz-executor.0 27193 292414 23383 32767 3 0x90 nanoslp syz-executor.0 23383 138179 27629 0 3 0x82 wait syz-executor.0 9251 125722 85659 32767 2 0x10 syz-executor.3 85659 317486 27629 0 3 0x82 wait syz-executor.3 94993 95510 30134 32767 3 0x90 nanoslp syz-executor.2 30134 148902 27629 0 3 0x82 wait syz-executor.2 40045 421138 0 0 3 0x14200 bored sosplice 22402 452303 10626 32767 3 0x90 nanoslp syz-executor.5 22855 12055 83162 32767 3 0x90 nanoslp syz-executor.4 76904 118973 89914 32767 2 0x10 syz-executor.6 83162 250751 27629 0 3 0x82 wait syz-executor.4 *93272 58865 8330 32767 7 0x10 syz-executor.7 89914 87572 27629 0 3 0x82 wait syz-executor.6 8330 132847 27629 0 3 0x82 wait syz-executor.7 10626 285398 27629 0 3 0x82 wait syz-executor.5 81163 113331 42008 32767 2 0x10 syz-executor.1 42008 519876 27629 0 3 0x82 wait syz-executor.1 27629 66597 11421 0 3 0x82 thrsleep syz-fuzzer 27629 224249 11421 0 2 0x4000482 syz-fuzzer 27629 122115 11421 0 2 0x4000482 syz-fuzzer 27629 346084 11421 0 3 0x4000082 thrsleep syz-fuzzer 27629 27834 11421 0 3 0x4000082 thrsleep syz-fuzzer 27629 363155 11421 0 3 0x4000082 thrsleep syz-fuzzer 27629 35676 11421 0 3 0x4000082 kqread syz-fuzzer 27629 74066 11421 0 3 0x4000082 thrsleep syz-fuzzer 27629 372165 11421 0 3 0x4000082 thrsleep syz-fuzzer 11421 257247 11513 0 3 0x10008a sigsusp ksh 11513 490002 88934 0 3 0x9a kqread sshd 84367 25861 1 0 3 0x100083 ttyin getty 88934 108135 1 0 3 0x88 kqread sshd 4771 385802 8874 73 3 0x1100090 kqread syslogd 8874 359834 1 0 3 0x100082 netio syslogd 43949 497392 1 0 3 0x100080 kqread resolvd 62548 184030 40671 77 3 0x100092 kqread dhcpleased 65845 368249 40671 77 3 0x100092 kqread dhcpleased 40671 516977 1 0 3 0x80 kqread dhcpleased 89168 167995 0 0 3 0x14200 bored smr 30208 271624 0 0 2 0x14200 zerothread 71813 280492 0 0 3 0x14200 aiodoned aiodoned 5264 17249 0 0 3 0x14200 syncer update 5909 76810 0 0 3 0x14200 cleaner cleaner 41706 99759 0 0 3 0x14200 reaper reaper 17692 439317 0 0 3 0x14200 pgdaemon pagedaemon 71022 473736 0 0 3 0x14200 bored viomb 67628 54434 0 0 3 0x40014200 acpi0 acpi0 89645 37675 0 0 3 0x40014200 idle1 6972 483760 0 0 3 0x14200 bored softnet 15960 159935 0 0 3 0x14200 bored systqmp 24853 374423 0 0 3 0x14200 bored systq 44839 352158 0 0 3 0x40014200 bored softclock 26694 342766 0 0 3 0x40014200 idle0 1 336221 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c86ecb8) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_extract+0xa2 sys/arch/amd64/amd64/pmap.c:1517 #4 uvm_fault_upper_lookup+0x129 sys/uvm/uvm_fault.c:852 #5 uvm_fault+0x139 sys/uvm/uvm_fault.c:607 #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 212 (syz-executor.4) thread 0xffff800024682548 (204801) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829e5a88) #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 (0xfffffd80769bf1b8) #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:677 #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 9251 (syz-executor.3) thread 0xffff8000ffff47e0 (125722) exclusive rrwlock inode r = 0 (0xfffffd806a8b83c8) #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 (0xfffffd80769bf5f8) #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 93272 (syz-executor.7) thread 0xffff8000fffee7e8 (58865) exclusive rwlock amaplk r = 0 (0xfffffd806ab75558) #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 (0xfffffd806ee6e750) #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 &pmap->pm_mtx r = 0 (0xfffffd806c86ecb8) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_extract+0xa2 sys/arch/amd64/amd64/pmap.c:1517 #4 uvm_fault_upper_lookup+0x129 sys/uvm/uvm_fault.c:852 #5 uvm_fault+0x139 sys/uvm/uvm_fault.c:607 #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 81163 (syz-executor.1) thread 0xffff8000ffff4d20 (113331) exclusive rrwlock inode r = 0 (0xfffffd80769bfb48) #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:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #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 (0xfffffd806a8b8e68) #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 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10174 6407K 6419K 78643K 11288 0 pcb 13 14K 18K 78643K 17 0 rtable 246 7K 7K 78643K 654 0 ifaddr 81 17K 17K 78643K 139 0 counters 56 35K 35K 78643K 72 0 ioctlops 0 0K 2K 78643K 50 0 iov 0 0K 16K 78643K 265 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1270 79K 79K 78643K 1678 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 173 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 129K 78643K 1808 0 sigio 0 0K 0K 78643K 9 0 proc 56 74K 99K 78643K 768 0 subproc 104 6K 6K 78643K 208 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2002 0 in_multi 99 6K 6K 78643K 216 0 ether_multi 1 0K 0K 78643K 7 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 2K 78643K 907 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 312 86K 100K 78643K 24031 0 UVM aobj 42 2K 2K 78643K 45 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 51 0 temp 125 4707K 4771K 78643K 8607 0 kqueue 12 18K 25K 78643K 191 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 120 260 0 257 4 2 2 3 0 8 1 rtentry 112 206 0 92 4 0 4 4 0 8 0 unpcb 136 2084 0 2069 12 7 5 6 0 8 4 syncache 296 9 0 9 2 2 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 736 3443 0 3421 78 68 10 28 0 8 8 arp 120 34 0 16 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 304 3874 0 3862 36 30 6 16 0 8 5 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 4 0 4 1 1 0 1 0 8 0 nd6 48 55 0 27 1 0 1 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 866 0 382 32 0 32 32 0 8 1 art_table 32 867 0 382 5 0 5 5 0 8 0 art_node 16 205 0 101 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 166 0 156 1 0 1 1 0 8 0 shmpl 112 42 0 3 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3600 0 2173 90 0 90 90 0 8 0 ffsino 272 3601 0 2173 96 0 96 96 0 8 0 nchpl 144 5986 0 4366 62 0 62 62 0 8 0 uvmvnodes 80 3818 0 0 78 0 78 78 0 8 0 vnodes 224 3818 0 0 225 0 225 225 0 8 0 namei 1024 19353 0 19351 2 1 1 2 0 8 0 percpumem 16 48 0 8 1 0 1 1 0 8 0 scxspl 216 17593 0 17593 12 9 3 8 0 8 3 plimitpl 152 261 0 239 2 1 1 2 0 8 0 sigapl 424 2070 0 2021 7 0 7 7 0 8 0 futexpl 64 15222 0 15221 1 0 1 1 0 8 0 knotepl 120 569 0 0 17 0 17 17 0 8 0 kqueuepl 216 621 0 613 11 8 3 5 0 8 2 pipepl 336 424 0 396 8 5 3 8 0 8 0 fdescpl 496 2055 0 2021 7 1 6 6 0 8 0 filepl 152 14503 0 14265 28 13 15 18 0 8 5 lockfpl 104 196 0 194 1 0 1 1 0 8 0 lockfspl 48 56 0 54 1 0 1 1 0 8 0 sessionpl 144 31 0 15 1 0 1 1 0 8 0 pgrppl 48 35 0 19 1 0 1 1 0 8 0 ucredpl 96 1573 0 1555 1 0 1 1 0 8 0 zombiepl 144 2021 0 2021 1 0 1 1 0 8 1 processpl 1064 2070 0 2021 5 1 4 4 0 8 0 procpl 672 5289 0 5230 8 1 7 7 0 8 0 sosppl 168 10 0 10 3 3 0 1 0 8 0 sockpl 480 6331 0 6301 134 114 20 28 0 8 16 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 147 0 0 17 0 17 17 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 493 0 0 29 0 29 29 0 8 0 bufpl 288 6170 0 143 431 0 431 431 0 8 0 anonpl 24 543352 0 529658 122 9 113 113 0 186 15 amapchunkpl 152 58349 0 57619 54 16 38 49 0 158 4 amappl16 200 5383 0 4997 41 12 29 34 0 8 8 amappl15 192 447 0 441 1 0 1 1 0 8 0 amappl14 184 11 0 6 1 0 1 1 0 8 0 amappl13 176 210 0 205 1 0 1 1 0 8 0 amappl12 168 364 0 359 1 0 1 1 0 8 0 amappl11 160 237 0 226 1 0 1 1 0 8 0 amappl10 152 107 0 101 1 0 1 1 0 8 0 amappl9 144 670 0 667 1 0 1 1 0 8 0 amappl8 136 1143 0 1071 3 0 3 3 0 8 0 amappl7 128 551 0 536 1 0 1 1 0 8 0 amappl6 120 416 0 392 2 1 1 2 0 8 0 amappl5 112 1654 0 1632 1 0 1 1 0 8 0 amappl4 104 1199 0 1171 2 0 2 2 0 8 0 amappl3 96 714 0 697 1 0 1 1 0 8 0 amappl2 88 931 0 880 3 1 2 3 0 8 0 amappl1 80 39915 0 39338 18 4 14 18 0 8 0 amappl 88 23427 0 23197 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 44 0 3 1 0 1 1 0 8 0 uaddrrnd 24 2055 0 2021 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2055 0 2021 1 0 1 1 0 8 0 vmmpekpl 168 19909 0 19860 3 0 3 3 0 8 0 vmmpepl 168 192518 0 190051 148 14 134 134 0 357 18 vmsppl 368 2054 0 2021 5 1 4 5 0 8 0 rwobjpl 56 51344 0 46198 75 0 75 75 0 8 0 pdppl 4096 4117 0 4042 167 86 81 97 0 8 6 pvpl 32 1022227 0 1003613 258 63 195 252 0 265 24 pmappl 248 2054 0 2021 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 972 0 163 24 0 24 24 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffca650, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) 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(3f8,0,3e) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,3e) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,3e) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(3e) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(3e) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff82638b36) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825ec18c) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000246741b0,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000246741b0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff8000246742b0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 end trace frame: 0xffff800024674320, count: 0 ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) 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(3f8,0,3e) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,3e) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,3e) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(3e) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(3e) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff82638b36) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825ec18c) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000246741b0,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000246741b0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff8000246742b0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd807620b948,ffff800024674348,8,fffffd807f7d8480) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807620b948,ffff800021157000,78,0,1,5cca519bd60a1d06,ffff800024674470,fffffd807620b948,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:330 ufs_symlink(ffff800024674470) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1398 VOP_SYMLINK(fffffd807620b088,ffff8000246745f0,ffff800024674620,ffff800024674520,ffff800021157000) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:442 dosymlinkat(ffff800024682548,200000c0,5,20d06ff8) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1804 syscall(ffff8000246747a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246747a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa45273530e0, count: -21