*cpu0: uvm_fault(0xfffffd806c445180, 0x8, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffd3b50, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002e383920 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff80002e383850 r9 0 r10 0x863dda21b87faf31 r11 0xbe478b1ac07719eb r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8140850c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff80002e3838a0 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{1}> show proc PROC (syz-executor.4) pid=497053 stat=onproc flags process=10 proc=0 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002467a7e0,0xffff80002467b270 process=0xffff80002122a158 user=0xffff80002e37e000, vmspace=0xfffffd8008732450 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38375 472224 49147 32767 2 0x10 syz-executor.5 32402 37110 44079 32767 2 0x10 syz-executor.1 *17396 497053 29257 32767 7 0x10 syz-executor.4 90162 267907 67520 32767 2 0x10 syz-executor.3 90162 241351 67520 32767 3 0x4000090 fsleep syz-executor.3 95892 191833 56599 32767 2 0x490 syz-executor.7 95892 477661 56599 32767 3 0x4000090 fsleep syz-executor.7 95892 478288 56599 32767 7 0x4000010 syz-executor.7 95892 369480 56599 32767 3 0x4000090 fsleep syz-executor.7 29257 207884 45358 32767 2 0x490 syz-executor.4 45358 408200 96198 0 3 0x82 wait syz-executor.4 49147 129115 35310 32767 3 0x90 nanoslp syz-executor.5 35310 55513 96198 0 3 0x82 wait syz-executor.5 98083 480879 94516 32767 2 0x10 syz-executor.2 94516 82124 96198 0 3 0x82 wait syz-executor.2 44079 249317 33050 32767 3 0x90 nanoslp syz-executor.1 33050 190206 96198 0 3 0x82 wait syz-executor.1 42904 464389 84126 32767 2 0x490 syz-executor.0 84126 69242 96198 0 3 0x82 wait syz-executor.0 16321 115218 18155 32767 2 0x10 syz-executor.6 18155 198196 96198 0 3 0x82 wait syz-executor.6 67520 231111 35561 32767 3 0x90 nanoslp syz-executor.3 35561 19993 96198 0 3 0x82 wait syz-executor.3 56599 43737 42199 32767 3 0x90 nanoslp syz-executor.7 42199 316445 96198 0 3 0x82 wait syz-executor.7 7352 356922 0 0 3 0x14200 bored sosplice 96198 332222 6307 0 3 0x82 thrsleep syz-fuzzer 96198 202510 6307 0 2 0x4000482 syz-fuzzer 96198 298990 6307 0 3 0x4000082 thrsleep syz-fuzzer 96198 404853 6307 0 3 0x4000082 thrsleep syz-fuzzer 96198 223995 6307 0 3 0x4000082 thrsleep syz-fuzzer 96198 305517 6307 0 3 0x4000082 thrsleep syz-fuzzer 96198 225157 6307 0 3 0x4000082 thrsleep syz-fuzzer 96198 135036 6307 0 3 0x4000082 kqread syz-fuzzer 96198 61935 6307 0 3 0x4000082 thrsleep syz-fuzzer 6307 492445 61201 0 3 0x10008a sigsusp ksh 61201 171604 20186 0 3 0x9a kqread sshd 19590 35663 1 0 3 0x100083 ttyin getty 20186 108832 1 0 3 0x88 kqread sshd 91164 343400 77472 73 3 0x1100090 kqread syslogd 77472 381071 1 0 3 0x100082 netio syslogd 40190 233565 1 0 3 0x100080 kqread resolvd 46869 73188 57979 77 3 0x100092 kqread dhcpleased 70867 313642 57979 77 3 0x100092 kqread dhcpleased 57979 211722 1 0 3 0x80 kqread dhcpleased 71329 26229 0 0 3 0x14200 bored smr 21881 339337 0 0 2 0x14200 zerothread 97529 378944 0 0 3 0x14200 aiodoned aiodoned 55982 421678 0 0 3 0x14200 syncer update 28525 146082 0 0 3 0x14200 cleaner cleaner 97657 392818 0 0 3 0x14200 reaper reaper 5137 155316 0 0 3 0x14200 pgdaemon pagedaemon 38269 271125 0 0 3 0x14200 bored viomb 77895 199826 0 0 3 0x40014200 acpi0 acpi0 35364 459773 0 0 3 0x40014200 idle1 93681 188540 0 0 3 0x14200 bored softnet 14375 287323 0 0 3 0x14200 bored systqmp 85125 386743 0 0 3 0x14200 bored systq 16090 35683 0 0 2 0x40014200 softclock 4494 349138 0 0 3 0x40014200 idle0 1 47352 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex pvpl r = 0 (0xffffffff829d37c0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 pmap_enter+0x169 #5 uvm_fault_lower+0x77c sys/uvm/uvm_fault.c:1496 #6 uvm_fault+0x248 #7 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #8 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #9 recall_trap+0x8 Process 17396 (syz-executor.4) thread 0xffff80002467b500 (497053) exclusive rwlock amaplk r = 0 (0xfffffd806c52a8d0) #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 (0xfffffd8008732468) #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 pvpl r = 0 (0xffffffff829d37c0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 pmap_enter+0x169 #5 uvm_fault_lower+0x77c sys/uvm/uvm_fault.c:1496 #6 uvm_fault+0x248 #7 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #8 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #9 recall_trap+0x8 Process 95892 (syz-executor.7) thread 0xffff80002467ba40 (478288) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82b8e0a0) #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 (0xfffffd807c51c1b0) #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 98083 (syz-executor.2) thread 0xffff80002467aa80 (480879) exclusive rrwlock inode r = 0 (0xfffffd806eada4e8) #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 (0xfffffd806eada818) #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 11491 0 pcb 13 16K 20K 78643K 19 0 rtable 262 7K 8K 78643K 4582 0 ifaddr 81 18K 18K 78643K 533 0 sysctl 3 1K 5K 78643K 7 0 counters 56 35K 35K 78643K 184 0 ioctlops 0 0K 2K 78643K 414 0 iov 0 0K 32K 78643K 7013 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1271 79K 79K 78643K 11009 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 470 0 VM map 2 1K 1K 78643K 2 0 sem 11 1K 1K 78643K 13 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 125K 78643K 43978 0 sigio 0 0K 0K 78643K 1802 0 proc 56 74K 111K 78643K 5544 0 subproc 104 6K 6K 78643K 936 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2780 0 in_multi 99 6K 7K 78643K 1285 0 ether_multi 1 0K 0K 78643K 163 0 mrt 3 0K 0K 78643K 6 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 8906 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 469 95K 114K 78643K 568087 0 UVM aobj 131 6K 7K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1086 0 NDP 11 0K 2K 78643K 219 0 temp 125 4711K 4839K 78643K 107551 0 kqueue 12 18K 27K 78643K 3661 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 3403 0 3400 43 42 1 5 0 8 0 rtentry 112 895 0 773 4 0 4 4 0 8 0 unpcb 136 50077 0 50064 323 322 1 10 0 8 0 syncache 296 300 0 300 60 60 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 170 0 170 31 31 0 1 0 8 0 tcpcb 736 17040 0 17033 502 501 1 20 0 8 0 arp 120 153 0 135 1 0 1 1 0 8 0 ipq 40 76 0 76 26 26 0 1 0 8 0 ipqe 40 1313 0 1313 26 26 0 1 0 8 0 inpcb 312 94663 0 94656 715 708 7 19 0 8 6 rttmr 72 83 0 82 2 1 1 1 0 8 0 ip6q 72 61 0 61 13 13 0 1 0 8 0 ip6af 40 139 0 139 13 13 0 1 0 8 0 nd6 48 277 0 241 1 0 1 1 0 8 0 kcovpl 48 72 0 64 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3941 0 3398 52 17 35 41 0 8 0 art_table 32 3942 0 3398 6 1 5 6 0 8 0 art_node 16 894 0 782 1 0 1 1 0 8 0 sysvmsgpl 40 39 0 39 1 1 0 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 61263 0 59800 92 0 92 92 0 8 0 ffsino 272 61263 0 59800 98 0 98 98 0 8 0 nchpl 144 118810 0 117184 62 0 62 62 0 8 0 uvmvnodes 80 6162 0 0 126 0 126 126 0 8 0 vnodes 224 6162 0 0 363 0 363 363 0 8 0 namei 1024 401844 0 401842 11 10 1 2 0 8 0 percpumem 16 104 0 64 1 0 1 1 0 8 0 scxspl 216 370010 0 370010 113 112 1 8 0 8 1 plimitpl 152 6895 0 6873 26 25 1 2 0 8 0 sigapl 424 44124 0 44074 7 1 6 7 0 8 0 futexpl 64 410679 0 410676 10 9 1 1 0 8 0 knotepl 120 2556 0 0 25 8 17 18 0 8 0 kqueuepl 216 13812 0 13804 216 215 1 8 0 8 0 pipepl 336 8643 0 8615 264 261 3 14 0 8 0 fdescpl 496 44109 0 44075 7 2 5 6 0 8 0 filepl 152 355750 0 355514 568 555 13 32 0 8 3 lockfpl 104 7754 0 7752 4 3 1 2 0 8 0 lockfspl 48 2626 0 2624 1 0 1 1 0 8 0 sessionpl 144 87 0 71 1 0 1 1 0 8 0 pgrppl 48 604 0 588 1 0 1 1 0 8 0 ucredpl 96 55093 0 55075 1 0 1 1 0 8 0 zombiepl 144 44075 0 44074 1 0 1 1 0 8 0 processpl 1064 44124 0 44074 5 1 4 4 0 8 0 procpl 672 131455 0 131393 65 58 7 8 0 8 0 sosppl 168 537 0 537 63 63 0 1 0 8 0 sockpl 480 149331 0 149308 2747 2738 9 50 0 8 6 mcl64k 65536 82 0 0 6 3 3 3 0 8 0 mcl16k 16384 65 0 0 6 3 3 3 0 8 0 mcl12k 12288 73 0 0 2 0 2 2 0 8 0 mcl9k 9216 41 0 0 3 1 2 2 0 8 0 mcl8k 8192 89 0 0 3 0 3 3 0 8 0 mcl4k 4096 97 0 0 4 1 3 3 0 8 0 mcl2k2 2112 25 0 0 2 1 1 2 0 8 0 mcl2k 2048 867 0 0 33 15 18 25 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 7471 0 0 463 0 463 463 0 8 0 bufpl 288 73254 0 66919 453 0 453 453 0 8 0 anonpl 24 12793433 0 12779027 552 439 113 143 0 186 0 amapchunkpl 152 1436149 0 1435411 357 320 37 56 0 158 0 amappl16 200 128779 0 128413 504 476 28 41 0 8 3 amappl15 192 5553 0 5543 1 0 1 1 0 8 0 amappl14 184 6486 0 6477 2 1 1 1 0 8 0 amappl13 176 6088 0 6086 1 0 1 1 0 8 0 amappl12 168 5160 0 5152 1 0 1 1 0 8 0 amappl11 160 2735 0 2725 1 0 1 1 0 8 0 amappl10 152 9090 0 9081 1 0 1 1 0 8 0 amappl9 144 7036 0 7031 1 0 1 1 0 8 0 amappl8 136 8091 0 7849 13 4 9 9 0 8 0 amappl7 128 5039 0 5026 1 0 1 1 0 8 0 amappl6 120 7000 0 6965 4 2 2 2 0 8 0 amappl5 112 49228 0 49210 1 0 1 1 0 8 0 amappl4 104 8464 0 8425 5 3 2 2 0 8 0 amappl3 96 10988 0 10976 1 0 1 1 0 8 0 amappl2 88 10755 0 10702 3 1 2 3 0 8 0 amappl1 80 795407 0 794799 20 5 15 18 0 8 0 amappl 88 564537 0 564281 14 6 8 8 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 44109 0 44075 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 44109 0 44075 1 0 1 1 0 8 0 vmmpekpl 168 334620 0 334557 4 0 4 4 0 8 0 vmmpepl 168 4060653 0 4057945 527 392 135 151 0 357 0 vmsppl 368 44108 0 44075 4 0 4 4 0 8 0 rwobjpl 56 988146 0 980378 141 29 112 114 0 8 1 pdppl 4096 88225 0 88150 1136 1055 81 95 0 8 6 pvpl 32 21046570 0 21026564 1225 1027 198 273 0 265 7 pmappl 248 44108 0 44075 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 3849 0 2576 39 1 38 38 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82932ff0) 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(ffffffff826418ee) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825f0dde) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff800021242bb0,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff800021242bb0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff800021242cb0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 end trace frame: 0xffff800021242d20, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82932ff0) 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(ffffffff826418ee) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825f0dde) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff800021242bb0,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff800021242bb0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff800021242cb0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd80664794c0,ffff800021242d48,8,fffffd807f7d86c0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd80664794c0,ffff800021157400,78,0,1,f8bfbdb8efa37baa,ffff800021242e70,fffffd80664794c0,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:330 ufs_symlink(ffff800021242e70) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1398 VOP_SYMLINK(fffffd80739b04e8,ffff800021242ff0,ffff800021243020,ffff800021242f20,ffff800021157400) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:442 dosymlinkat(ffff80002467ba40,200000c0,3,20d06ff8) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1804 syscall(ffff8000212431a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212431a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd0d5d90c810, 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: 0x7f7ffffd3b50, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffd3b50, count: -1