*cpu0: uvm_fault(0xfffffd806cb518b8, 0x8, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xd6 end of kernel end trace frame: 0x7f7fffff67f0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800021d586a0 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff800021d585d0 r9 0 r10 0x570b87ddd5b38c74 r11 0xb525c7ed97367cb4 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff814964e6 proc_trampoline+0xd6 cs 0x8 rflags 0x246 rsp 0xffff800021d58620 ss 0 proc_trampoline+0xd6: movl $0,%gs:0x540 ddb{1}> show proc PROC (syz-executor.1) pid=265867 stat=onproc flags process=10 proc=0 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800022da9a50,0xffffffff82bb14d0 process=0xffff8000fffedd68 user=0xffff800021d53000, vmspace=0xfffffd807e9155d0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *47103 265867 33141 32767 7 0x10 syz-executor.1 60026 423641 3987 32767 2 0x10 syz-executor.5 60026 353034 3987 32767 3 0x4000090 netio syz-executor.5 27131 400240 12227 32767 2 0x10 syz-executor.0 27131 145331 12227 32767 2 0x4000010 syz-executor.0 3121 86883 35797 32767 2 0x10 syz-executor.6 3121 39258 35797 32767 7 0x4000010 syz-executor.6 55377 266345 47384 32767 2 0x10 syz-executor.2 47384 80100 58795 0 3 0x82 wait syz-executor.2 91659 416072 61879 32767 3 0x90 nanoslp syz-executor.4 61879 285334 58795 0 3 0x82 wait syz-executor.4 92105 427197 59786 32767 2 0x10 syz-executor.7 59786 53878 58795 0 3 0x82 wait syz-executor.7 63579 173130 10932 32767 2 0x10 syz-executor.3 10932 70727 58795 0 3 0x82 wait syz-executor.3 69662 283978 0 0 3 0x14200 bored sosplice 9617 139357 19521 0 3 0x100082 netio ndp 19521 230548 23976 0 3 0x10008a sigsusp sh 35797 244362 33522 32767 3 0x90 nanoslp syz-executor.6 33141 407980 43788 32767 3 0x90 nanoslp syz-executor.1 3987 259459 54347 32767 2 0x490 syz-executor.5 33522 263114 58795 0 3 0x82 wait syz-executor.6 54347 507057 58795 0 3 0x82 wait syz-executor.5 43788 3260 58795 0 3 0x82 wait syz-executor.1 23976 282522 1 0 3 0x80 wait syz-executor.4 12227 83480 75674 32767 3 0x90 nanoslp syz-executor.0 75674 454383 58795 0 3 0x82 wait syz-executor.0 58795 137554 74351 0 3 0x82 wait syz-fuzzer 58795 169833 74351 0 2 0x4000482 syz-fuzzer 58795 485996 74351 0 3 0x4000082 thrsleep syz-fuzzer 58795 205706 74351 0 3 0x4000082 thrsleep syz-fuzzer 58795 316411 74351 0 3 0x4000082 thrsleep syz-fuzzer 58795 23074 74351 0 3 0x4000082 wait syz-fuzzer 58795 25234 74351 0 3 0x4000082 kqread syz-fuzzer 58795 5352 74351 0 3 0x4000082 wait syz-fuzzer 58795 99477 74351 0 3 0x4000082 thrsleep syz-fuzzer 58795 239871 74351 0 3 0x4000082 wait syz-fuzzer 58795 474201 74351 0 3 0x4000082 wait syz-fuzzer 58795 253895 74351 0 3 0x4000082 wait syz-fuzzer 58795 398863 74351 0 3 0x4000082 wait syz-fuzzer 58795 268583 74351 0 3 0x4000082 wait syz-fuzzer 58795 133337 74351 0 3 0x4000082 thrsleep syz-fuzzer 58795 255102 74351 0 3 0x4000082 thrsleep syz-fuzzer 74351 299710 43259 0 3 0x10008a sigsusp ksh 43259 343966 3152 0 3 0x9a kqread sshd 34933 362382 1 0 3 0x100083 ttyin getty 3152 266576 1 0 3 0x88 kqread sshd 9396 393928 90713 73 3 0x1100090 kqread syslogd 90713 21847 1 0 3 0x100082 netio syslogd 52147 148524 1 0 3 0x100080 kqread resolvd 9911 425890 19934 77 3 0x100092 kqread dhcpleased 91942 374211 19934 77 3 0x100092 kqread dhcpleased 19934 161407 1 0 3 0x80 kqread dhcpleased 70589 444105 0 0 3 0x14200 bored smr 1107 17463 0 0 2 0x14200 zerothread 79568 234552 0 0 3 0x14200 aiodoned aiodoned 14421 192896 0 0 3 0x14200 syncer update 70998 221277 0 0 3 0x14200 cleaner cleaner 5443 493949 0 0 3 0x14200 reaper reaper 27239 447779 0 0 3 0x14200 pgdaemon pagedaemon 97983 517968 0 0 3 0x14200 bored viomb 34219 101538 0 0 3 0x40014200 acpi0 acpi0 67966 454426 0 0 3 0x40014200 idle1 62491 483209 0 0 3 0x14200 bored softnet 43994 32094 0 0 3 0x14200 bored softnet 40143 316020 0 0 3 0x14200 bored softnet 9757 298386 0 0 3 0x14200 bored softnet 70584 152285 0 0 3 0x14200 bored systqmp 59136 246012 0 0 3 0x14200 bored systq 72425 480730 0 0 2 0x40014200 softclock 70771 356074 0 0 3 0x40014200 idle0 1 454852 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff82ad28e0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_upper+0x301 sys/uvm/uvm_fault.c:1082 #4 uvm_fault+0x154 sys/uvm/uvm_fault.c:609 #5 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #6 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:417 #7 recall_trap+0x8 Process 47103 (syz-executor.1) thread 0xffff800022da87f0 (265867) exclusive rwlock amaplk r = 0 (0xfffffd806bb581d0) #0 witness_lock+0x44d #1 uvm_fault_check+0x419 sys/uvm/uvm_fault.c:783 #2 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:417 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd807e915678) #0 witness_lock+0x44d #1 uvmfault_lookup+0xc9 sys/uvm/uvm_fault.c:1773 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:673 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:417 #6 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff82ad28e0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_upper+0x301 sys/uvm/uvm_fault.c:1082 #4 uvm_fault+0x154 sys/uvm/uvm_fault.c:609 #5 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #6 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:417 #7 recall_trap+0x8 Process 3121 (syz-executor.6) thread 0xffff800022da9510 (39258) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82bb5c58) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3bb sys/kern/sched_bsd.c:415 #3 sleep_finish+0x180 sys/kern/kern_synch.c:417 #4 tsleep+0x12c sys/kern/kern_synch.c:155 #5 biowait+0x91 sys/kern/vfs_bio.c:1268 #6 bwrite+0x21b sys/kern/vfs_bio.c:769 #7 VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 #8 ufs_direnter+0x8fa sys/ufs/ufs/ufs_lookup.c:909 #9 ufs_makeinode+0x4cc sys/ufs/ufs/ufs_vnops.c:1856 #10 ufs_symlink+0x47 sys/ufs/ufs/ufs_vnops.c:1370 #11 VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426 #12 dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802 #13 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #13 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806badc808) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x1fc sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324 #8 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #9 ufs_makeinode+0xae sys/ufs/ufs/ufs_vnops.c:1818 #10 ufs_symlink+0x47 sys/ufs/ufs/ufs_vnops.c:1370 #11 VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426 #12 dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802 #13 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #13 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #14 Xsyscall+0x128 Process 55377 (syz-executor.2) thread 0xffff8000ffff2fc8 (266345) exclusive rrwlock inode r = 0 (0xfffffd80687fb2c0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #10 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806792fa28) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #9 Xsyscall+0x128 Process 92105 (syz-executor.7) thread 0xffff8000ffff07f0 (427197) exclusive rrwlock inode r = 0 (0xfffffd806e7314e0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vn_closefile+0xc6 vn_close sys/kern/vfs_vnops.c:292 [inline] #5 vn_closefile+0xc6 sys/kern/vfs_vnops.c:609 #6 fdrop+0xc7 sys/kern/kern_descrip.c:1274 #7 closef+0x11c sys/kern/kern_descrip.c:1258 #8 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10223 6413K 6420K 78643K 11336 0 pcb 13 16K 20K 78643K 19 0 rtable 238 6K 7K 78643K 1016 0 ifaddr 71 16K 16K 78643K 117 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 74 0 ioctlops 0 0K 2K 78643K 169 0 iov 0 0K 28K 78643K 1775 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1284 80K 80K 78643K 2929 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 131 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 2083 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 121K 78643K 9258 0 sigio 0 0K 0K 78643K 265 0 proc 56 78K 115K 78643K 1136 0 subproc 117 7K 7K 78643K 195 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 680 0 in_multi 99 6K 7K 78643K 229 0 ether_multi 1 0K 0K 78643K 15 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 247 1102K 1102K 78643K 247 0 exec 0 0K 1K 78643K 2341 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 8 62K 64K 78643K 10 0 UVM amap 380 100K 115K 78643K 69258 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 260 0 NDP 11 0K 2K 78643K 48 0 temp 128 4694K 4822K 78643K 25485 0 kqueue 13 20K 28K 78643K 881 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 1108 0 1104 14 13 1 3 0 8 0 rtentry 112 196 0 84 4 0 4 4 0 8 0 unpcb 144 26437 0 26422 110 106 4 12 0 8 3 syncache 296 90 0 90 19 18 1 1 0 8 1 tcpqe 32 84 0 84 12 12 0 1 0 8 0 tcpcb 776 4751 0 4746 100 92 8 15 0 8 7 arp 120 33 0 15 1 0 1 1 0 8 0 ipq 40 14 0 14 4 4 0 1 0 8 0 ipqe 40 45 0 45 4 4 0 1 0 8 0 inpcb 368 9615 0 9607 135 127 8 19 0 8 6 ip6q 72 2 0 2 2 2 0 1 0 8 0 ip6af 40 6 0 6 2 2 0 1 0 8 0 nd6 48 52 0 26 1 0 1 1 0 8 0 kcovpl 48 15 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 795 0 337 30 1 29 30 0 8 0 art_table 32 796 0 337 4 0 4 4 0 8 0 art_node 16 195 0 93 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 2073 0 2063 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 13691 0 12244 91 0 91 91 0 8 0 ffsino 272 13691 0 12244 97 0 97 97 0 8 0 nchpl 144 26590 0 24958 62 0 62 62 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 90109 0 90107 4 3 1 2 0 8 0 percpumem 16 49 0 7 1 0 1 1 0 8 0 kstatmem 264 36 0 14 2 0 2 2 0 8 0 scxspl 216 76590 0 76590 37 35 2 8 0 8 2 plimitpl 152 2400 0 2376 2 0 2 2 0 8 0 sigapl 424 9523 0 9468 7 0 7 7 0 8 0 futexpl 64 78045 0 78045 4 3 1 1 0 8 1 knotepl 120 993 0 0 19 2 17 17 0 8 0 kqueuepl 216 2617 0 2608 46 41 5 12 0 8 4 pipepl 320 4522 0 4491 98 87 11 16 0 8 8 fdescpl 496 9505 0 9469 9 3 6 6 0 8 0 filepl 152 86555 0 86298 164 144 20 27 0 8 8 lockfpl 104 1222 0 1220 1 0 1 1 0 8 0 lockfspl 48 359 0 357 1 0 1 1 0 8 0 sessionpl 144 30 0 13 1 0 1 1 0 8 0 pgrppl 48 350 0 333 1 0 1 1 0 8 0 ucredpl 104 10656 0 10638 1 0 1 1 0 8 0 zombiepl 144 9469 0 9468 2 1 1 1 0 8 0 processpl 1072 9523 0 9468 5 1 4 5 0 8 0 procpl 672 29501 0 29428 18 9 9 9 0 8 1 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 174 0 174 18 18 0 1 0 8 0 sockpl 488 37632 0 37605 897 884 13 39 0 8 9 mcl64k 65536 26 0 0 4 1 3 3 0 8 0 mcl16k 16384 25 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 20 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 49 0 0 4 0 4 4 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 477 0 0 46 14 32 46 0 8 0 mtagpl 96 17 0 0 1 0 1 1 0 8 0 mbufpl 256 4980 0 0 282 0 282 282 0 8 0 bufpl 288 17827 0 11496 453 0 453 453 0 8 0 anonpl 24 2091308 0 2077413 256 144 112 130 0 186 7 amapchunkpl 152 203744 0 203006 144 110 34 46 0 158 1 amappl16 200 24813 0 24435 190 161 29 46 0 8 8 amappl15 192 13 0 13 2 2 0 1 0 8 0 amappl14 184 176 0 162 2 0 2 2 0 8 0 amappl13 176 24 0 23 1 0 1 1 0 8 0 amappl12 168 478 0 470 1 0 1 1 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 1010 0 1008 1 0 1 1 0 8 0 amappl8 136 476 0 369 4 0 4 4 0 8 0 amappl7 128 204 0 178 2 0 2 2 0 8 0 amappl6 120 289 0 274 1 0 1 1 0 8 0 amappl5 112 282 0 276 1 0 1 1 0 8 0 amappl4 104 719 0 685 3 2 1 3 0 8 0 amappl3 96 29948 0 29890 2 0 2 2 0 8 0 amappl2 88 10262 0 10181 3 1 2 3 0 8 0 amappl1 80 221504 0 220721 25 6 19 22 0 8 0 amappl 88 68297 0 68083 6 0 6 6 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 9505 0 9469 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9505 0 9469 1 0 1 1 0 8 0 vmmpekpl 168 95790 0 95721 4 0 4 4 0 8 0 vmmpepl 168 890355 0 887435 277 122 155 155 0 357 12 vmsppl 368 9504 0 9469 4 0 4 4 0 8 0 rwobjpl 56 251323 0 243676 125 12 113 113 0 8 1 pdppl 4096 19017 0 18938 299 212 87 93 0 8 8 pvpl 32 3860291 0 3839980 489 282 207 271 0 265 18 pmappl 248 9504 0 9469 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1462 0 360 32 0 32 32 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff829c5ff0) 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(3f8,0,65) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,65) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,65) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(65) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff82660c14) at db_printf+0x85 sys/kern/subr_prf.c:498 fault(ffffffff82610617) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff80002fea0b20,8) at kpageflttrap+0x2b7 sys/arch/amd64/amd64/trap.c:289 kerntrap(ffff80002fea0b20) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff80002fea0c20) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 end trace frame: 0xffff80002fea0c90, count: 0 ddb{0}> trace x86_ipi_db(ffffffff829c5ff0) 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(3f8,0,65) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,65) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,65) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(65) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff82660c14) at db_printf+0x85 sys/kern/subr_prf.c:498 fault(ffffffff82610617) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff80002fea0b20,8) at kpageflttrap+0x2b7 sys/arch/amd64/amd64/trap.c:289 kerntrap(ffff80002fea0b20) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff80002fea0c20) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd807899b498,ffff80002fea0cb8,8,fffffd807f7d7478) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807899b498,ffff800021259000,fa,0,1,391d9a89cdf127ce,ffff80002fea0de0,fffffd807899b498,78) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324 ufs_symlink(ffff80002fea0de0) at ufs_symlink+0x142 sys/ufs/ufs/ufs_vnops.c:1386 VOP_SYMLINK(fffffd807899b2e8,ffff80002fea0f60,ffff80002fea0f90,ffff80002fea0e90,ffff800021259000) at VOP_SYMLINK+0xd0 sys/kern/vfs_vops.c:426 dosymlinkat(ffff800022da9510,20001600,ffffff9c,20000000) at dosymlinkat+0x154 sys/kern/vfs_syscalls.c:1802 syscall(ffff80002fea1110) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002fea1110) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc45a4bbd5e0, count: -21 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xd6: movl $0,%gs:0x540 proc_trampoline() at proc_trampoline+0xd6 end of kernel end trace frame: 0x7f7fffff67f0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xd6 end of kernel end trace frame: 0x7f7fffff67f0, count: -1