*cpu0: uvm_fault(0xfffffd806c5b9180, 0x8, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7fffff28c0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002e37b790 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff80002e37b6c0 r9 0 r10 0x3d50bc81b8c980dd r11 0xc7943e4c2e661d9e r12 0 r13 0 r14 0 r15 0 rip 0xffffffff823fc50c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff80002e37b710 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{1}> show proc PROC (syz-executor.3) pid=225545 stat=onproc flags process=10 proc=0 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800028713a50,0xffff800028713520 process=0xffff80002953a9b0 user=0xffff80002e376000, vmspace=0xfffffd806c5b98b0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 12564 299253 48545 32767 7 0x4081010 syz-executor.4 12564 303750 48545 32767 3 0x4003010 suspend syz-executor.4 *86619 225545 23350 32767 7 0x10 syz-executor.3 8151 67088 5349 32767 2 0x10 syz-executor.7 8151 135330 5349 32767 3 0x4000090 fsleep syz-executor.7 85168 86157 56968 32767 2 0x10 syz-executor.1 62279 238713 95602 32767 2 0x490 syz-executor.5 95602 465450 63658 0 3 0x82 wait syz-executor.5 23350 353600 91054 32767 3 0x90 nanoslp syz-executor.3 91054 331717 63658 0 3 0x82 wait syz-executor.3 48545 368231 49678 32767 2 0x490 syz-executor.4 49678 382354 63658 0 3 0x82 wait syz-executor.4 5349 407914 49879 32767 3 0x90 nanoslp syz-executor.7 49879 363177 63658 0 3 0x82 wait syz-executor.7 98049 397194 7816 32767 2 0x490 syz-executor.0 7816 50253 63658 0 3 0x82 wait syz-executor.0 85031 281123 40472 32767 3 0x90 piperd syz-executor.2 40472 260765 63658 0 3 0x82 wait syz-executor.2 80209 355539 47244 32767 2 0x10 syz-executor.6 47244 353411 63658 0 3 0x82 wait syz-executor.6 26159 264431 0 0 3 0x14200 bored sosplice 56968 116490 68594 32767 2 0x490 syz-executor.1 68594 114481 63658 0 3 0x82 wait syz-executor.1 63658 379725 68239 0 3 0x82 thrsleep syz-fuzzer 63658 175336 68239 0 2 0x4000482 syz-fuzzer 63658 353324 68239 0 3 0x4000082 thrsleep syz-fuzzer 63658 315940 68239 0 3 0x4000082 thrsleep syz-fuzzer 63658 140720 68239 0 3 0x4000082 thrsleep syz-fuzzer 63658 277973 68239 0 3 0x4000082 thrsleep syz-fuzzer 63658 307075 68239 0 3 0x4000082 kqread syz-fuzzer 63658 376447 68239 0 3 0x4000082 thrsleep syz-fuzzer 63658 381773 68239 0 3 0x4000082 thrsleep syz-fuzzer 68239 496251 78872 0 3 0x10008a sigsusp ksh 78872 310853 60169 0 3 0x9a kqread sshd 55717 310147 1 0 3 0x100083 ttyin getty 60169 401681 1 0 3 0x88 kqread sshd 10067 41842 6298 73 3 0x1100090 kqread syslogd 6298 185907 1 0 3 0x100082 netio syslogd 97404 408775 1 0 3 0x100080 kqread resolvd 45076 330009 65309 77 3 0x100092 kqread dhcpleased 91844 10561 65309 77 3 0x100092 kqread dhcpleased 65309 258241 1 0 3 0x80 kqread dhcpleased 57488 225259 0 0 3 0x14200 bored smr 6382 349706 0 0 2 0x14200 zerothread 50786 453986 0 0 3 0x14200 aiodoned aiodoned 28795 443290 0 0 3 0x14200 syncer update 73859 266632 0 0 3 0x14200 cleaner cleaner 18486 225690 0 0 3 0x14200 reaper reaper 55150 40097 0 0 3 0x14200 pgdaemon pagedaemon 64263 111869 0 0 3 0x14200 bored viomb 71078 329811 0 0 3 0x40014200 acpi0 acpi0 67076 490065 0 0 3 0x40014200 idle1 12461 420610 0 0 3 0x14200 bored softnet 49555 74822 0 0 3 0x14200 bored systqmp 46121 225482 0 0 3 0x14200 bored systq 26054 12588 0 0 2 0x40014200 softclock 74147 331256 0 0 3 0x40014200 idle0 1 387056 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 (0xfffffd80649fc9c0) #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 12564 (syz-executor.4) thread 0xffff800028713cf0 (299253) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829ca5b8) #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 (0xfffffd8060c1b1b0) #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 86619 (syz-executor.3) thread 0xffff800028712010 (225545) exclusive rwlock amaplk r = 0 (0xfffffd806c16c470) #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 (0xfffffd806c5b98c8) #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 (0xfffffd80649fc9c0) #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 80209 (syz-executor.6) thread 0xffff8000246b7a40 (355539) exclusive rrwlock inode r = 0 (0xfffffd806331a5f8) #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 (0xfffffd8068f245f0) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10213 6412K 6419K 78643K 11389 0 pcb 13 16K 20K 78643K 19 0 rtable 266 7K 8K 78643K 3103 0 ifaddr 81 17K 17K 78643K 280 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 112 0 ioctlops 0 0K 2K 78643K 163 0 iov 0 0K 48K 78643K 5085 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1271 79K 79K 78643K 12274 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 324 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 7859 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 113K 78643K 32236 0 sigio 0 0K 0K 78643K 530 0 proc 56 74K 99K 78643K 3416 0 subproc 104 6K 6K 78643K 468 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 3059 0 in_multi 99 6K 7K 78643K 781 0 ether_multi 1 0K 0K 78643K 107 0 mrt 2 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 295 1314K 1314K 78643K 295 0 exec 0 0K 2K 78643K 5402 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 461 93K 110K 78643K 417710 0 UVM aobj 131 8K 8K 78643K 140 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 932 0 NDP 11 0K 2K 78643K 111 0 temp 125 4707K 4787K 78643K 79411 0 kqueue 12 18K 26K 78643K 3164 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 2616 0 2613 31 30 1 3 0 8 0 rtentry 112 490 0 366 4 0 4 4 0 8 0 unpcb 136 22498 0 22482 204 202 2 9 0 8 1 syncache 296 274 0 274 50 50 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 102 0 102 31 31 0 1 0 8 0 tcpcb 736 11905 0 11901 307 299 8 25 0 8 7 arp 120 81 0 61 1 0 1 1 0 8 0 ipq 40 41 0 40 18 17 1 1 0 8 0 ipqe 40 418 0 417 18 17 1 1 0 8 0 inpcb 304 53071 0 53060 409 402 7 17 0 8 5 rttmr 72 214 0 213 2 1 1 1 0 8 0 ip6q 72 65 0 65 8 8 0 1 0 8 0 ip6af 40 125 0 125 9 9 0 1 0 8 0 nd6 48 168 0 133 1 0 1 1 0 8 0 kcovpl 48 36 0 28 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2285 0 1709 59 23 36 42 0 8 0 art_table 32 2286 0 1709 6 0 6 6 0 8 0 art_node 16 489 0 375 1 0 1 1 0 8 0 sysvmsgpl 40 45 0 21 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 7857 0 7847 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 49354 0 47879 93 0 93 93 0 8 0 ffsino 272 49354 0 47879 99 0 99 99 0 8 0 nchpl 144 92527 0 90897 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 325411 0 325410 5 4 1 2 0 8 0 percpumem 16 68 0 28 1 0 1 1 0 8 0 scxspl 216 254848 0 254848 96 95 1 8 0 8 1 plimitpl 152 7363 0 7341 25 24 1 2 0 8 0 sigapl 424 32455 0 32405 7 1 6 7 0 8 0 futexpl 64 293657 0 293656 4 3 1 1 0 8 0 knotepl 120 1581 0 0 18 1 17 17 0 8 0 kqueuepl 216 18930 0 18922 234 233 1 12 0 8 0 pipepl 336 8388 0 8360 223 215 8 13 0 8 5 fdescpl 496 32440 0 32407 7 2 5 6 0 8 0 filepl 152 267140 0 266902 402 387 15 26 0 8 5 lockfpl 104 4454 0 4452 2 1 1 2 0 8 0 lockfspl 48 1365 0 1363 1 0 1 1 0 8 0 sessionpl 144 51 0 35 1 0 1 1 0 8 0 pgrppl 48 433 0 417 1 0 1 1 0 8 0 ucredpl 96 60373 0 60355 1 0 1 1 0 8 0 zombiepl 144 32408 0 32405 1 0 1 1 0 8 0 processpl 1064 32455 0 32405 5 1 4 4 0 8 0 procpl 672 95969 0 95908 33 26 7 8 0 8 0 sosppl 168 409 0 409 47 46 1 1 0 8 1 sockpl 480 79284 0 79258 1253 1242 11 35 0 8 7 mcl64k 65536 65 0 0 5 2 3 3 0 8 0 mcl16k 16384 49 0 0 4 1 3 3 0 8 0 mcl12k 12288 49 0 0 3 1 2 2 0 8 0 mcl9k 9216 33 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 5 2 3 3 0 8 0 mcl4k 4096 57 0 0 3 0 3 3 0 8 0 mcl2k2 2112 12 0 0 1 0 1 1 0 8 0 mcl2k 2048 514 0 0 26 10 16 21 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 7233 0 0 430 1 429 429 0 8 0 bufpl 288 54847 0 48513 453 0 453 453 0 8 0 anonpl 24 9420970 0 9406736 578 467 111 136 0 186 0 amapchunkpl 152 1072171 0 1071424 273 238 35 48 0 158 1 amappl16 200 99188 0 98826 475 454 21 45 0 8 0 amappl15 192 4673 0 4667 1 0 1 1 0 8 0 amappl14 184 1852 0 1848 1 0 1 1 0 8 0 amappl13 176 5948 0 5944 1 0 1 1 0 8 0 amappl12 168 2209 0 2205 1 0 1 1 0 8 0 amappl11 160 68 0 56 1 0 1 1 0 8 0 amappl10 152 4325 0 4315 1 0 1 1 0 8 0 amappl9 144 13790 0 13779 1 0 1 1 0 8 0 amappl8 136 4459 0 4214 9 0 9 9 0 8 0 amappl7 128 2047 0 2035 1 0 1 1 0 8 0 amappl6 120 13640 0 13604 3 1 2 2 0 8 0 amappl5 112 32416 0 32394 1 0 1 1 0 8 0 amappl4 104 4139 0 4110 2 1 1 2 0 8 0 amappl3 96 8019 0 8005 1 0 1 1 0 8 0 amappl2 88 8773 0 8721 3 1 2 3 0 8 0 amappl1 80 580517 0 579918 35 21 14 18 0 8 0 amappl 88 415277 0 415023 8 0 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 72 139 0 9 3 0 3 3 0 8 0 uaddrrnd 24 32440 0 32407 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 32440 0 32407 1 0 1 1 0 8 0 vmmpekpl 168 252743 0 252683 5 1 4 4 0 8 0 vmmpepl 168 2981808 0 2979160 446 313 133 143 0 357 0 vmsppl 368 32439 0 32407 4 0 4 4 0 8 0 rwobjpl 56 728897 0 721367 134 22 112 113 0 8 0 pdppl 4096 64887 0 64814 561 480 81 89 0 8 8 pvpl 32 15440269 0 15420670 927 736 191 259 0 265 0 pmappl 248 32439 0 32407 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2284 0 1039 36 0 36 36 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff8298cff0) 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(800,6b) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(6b) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(6b) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6ac sys/kern/subr_prf.c:728 db_printf(ffffffff82596098) at db_printf+0x85 sys/kern/subr_prf.c:502 db_ktrap(6,0,ffff8000246a09d0) at db_ktrap+0xb1 db_printtrap sys/arch/amd64/amd64/db_interface.c:98 [inline] db_ktrap(6,0,ffff8000246a09d0) at db_ktrap+0xb1 sys/arch/amd64/amd64/db_interface.c:127 kerntrap(ffff8000246a09d0) at kerntrap+0x13d sys/arch/amd64/amd64/trap.c:309 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff8000246a0ad0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd807b56ce00,ffff8000246a0b68,8,fffffd807f7d81e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 end trace frame: 0xffff8000246a0c00, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8298cff0) 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(800,6b) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(6b) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(6b) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6ac sys/kern/subr_prf.c:728 db_printf(ffffffff82596098) at db_printf+0x85 sys/kern/subr_prf.c:502 db_ktrap(6,0,ffff8000246a09d0) at db_ktrap+0xb1 db_printtrap sys/arch/amd64/amd64/db_interface.c:98 [inline] db_ktrap(6,0,ffff8000246a09d0) at db_ktrap+0xb1 sys/arch/amd64/amd64/db_interface.c:127 kerntrap(ffff8000246a09d0) at kerntrap+0x13d sys/arch/amd64/amd64/trap.c:309 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff8000246a0ad0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd807b56ce00,ffff8000246a0b68,8,fffffd807f7d81e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807b56ce00,ffff800021156800,78,0,1,34297956c4cd9d37,ffff8000246a0c90,fffffd807b56ce00,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:330 ufs_symlink(ffff8000246a0c90) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1398 VOP_SYMLINK(fffffd807b7446b0,ffff8000246a0e10,ffff8000246a0e40,ffff8000246a0d40,ffff800021156800) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:442 dosymlinkat(ffff800028713cf0,200000c0,3,20d06ff8) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1804 syscall(ffff8000246a0fc0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246a0fc0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cfa42aa760, count: -20 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: 0x7f7fffff28c0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7fffff28c0, count: -1