*cpu0: uvm_fault(0xfffffd8073df1018, 0x8, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x245f89410, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800035d96650 rbx 0 rdx 0 rcx 0xffff80002a215818 rax 0x32 r8 0xffff800035d96580 r9 0x1 r10 0x6d5dcb5216d6078e r11 0x5955cf931ff85c8d r12 0 r13 0 r14 0xffff80002a215818 r15 0 rip 0xffffffff811e03fe savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff800035d965d0 ss 0x10 savectx+0xae: movl $0,%gs:0x660 ddb{1}> show proc PROC (syz-fuzzer) tid=101197 pid=38647 tcnt=16 stat=onproc flags process=2000002 proc=4000000 runpri=24, usrpri=50, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a229ff0,0xffff80002a250d50 process=0xffff8000ffff51d0 user=0xffff800035d91000, vmspace=0xfffffd8008ba2540 estcpu=0, cpticks=1, pctcpu=0.5, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 98450 503732 80631 32767 2 0x10 syz-executor.7 9401 245165 4453 32767 2 0x10 syz-executor.5 58368 374461 17446 32767 2 0x10 syz-executor.2 58368 319586 17446 32767 3 0x4000090 fsleep syz-executor.2 3249 389230 9438 32767 2 0x10 syz-executor.1 3249 329449 9438 32767 2 0x4000010 syz-executor.1 3249 235744 9438 32767 7 0x4000010 syz-executor.1 3249 449 9438 32767 3 0x4000090 fsleep syz-executor.1 14285 367015 0 0 3 0x14200 bored sosplice 80631 388375 51524 32767 2 0x10 syz-executor.7 4453 354828 52731 32767 3 0x90 nanoslp syz-executor.5 51524 333816 38647 0 3 0x82 wait syz-executor.7 8044 16385 40931 32767 3 0x90 nanoslp syz-executor.3 37829 231437 67891 32767 3 0x10 getblk syz-executor.6 60299 141413 41000 32767 2 0x10 syz-executor.4 67891 442128 38647 0 3 0x82 wait syz-executor.6 52731 493459 38647 0 3 0x82 wait syz-executor.5 41000 138014 38647 0 3 0x82 wait syz-executor.4 17446 331006 80447 32767 3 0x90 nanoslp syz-executor.2 40931 320794 38647 0 3 0x82 wait syz-executor.3 9438 398453 41604 32767 3 0x90 nanoslp syz-executor.1 80447 418552 38647 0 3 0x82 wait syz-executor.2 41322 201855 73932 32767 2 0x10 syz-executor.0 41604 349593 38647 0 3 0x82 wait syz-executor.1 73932 243699 38647 0 3 0x82 wait syz-executor.0 38647 79712 94047 0 3 0x2000082 thrsleep syz-fuzzer 38647 23369 94047 0 3 0x6000082 nanoslp syz-fuzzer 38647 321502 94047 0 3 0x6000082 wait syz-fuzzer 38647 285157 94047 0 3 0x6000082 wait syz-fuzzer 38647 363139 94047 0 3 0x6000082 thrsleep syz-fuzzer 38647 409398 94047 0 3 0x6000082 wait syz-fuzzer 38647 367585 94047 0 3 0x6000082 wait syz-fuzzer 38647 99984 94047 0 3 0x6000082 wait syz-fuzzer 38647 167284 94047 0 3 0x6000082 wait syz-fuzzer 38647 31617 94047 0 3 0x6000082 wait syz-fuzzer 38647 329382 94047 0 3 0x6000082 thrsleep syz-fuzzer 38647 488450 94047 0 3 0x6000082 wait syz-fuzzer 38647 520310 94047 0 3 0x6000082 thrsleep syz-fuzzer 38647 460757 94047 0 3 0x6000082 thrsleep syz-fuzzer *38647 101197 94047 0 7 0x6000002 syz-fuzzer 38647 24939 94047 0 3 0x6000082 thrsleep syz-fuzzer 94047 341807 58031 0 3 0x10008a sigsusp ksh 58031 145331 31088 0 3 0x9a kqread sshd 20295 314195 1 0 3 0x100083 ttyin getty 31088 167321 1 0 3 0x88 kqread sshd 98277 431746 75037 73 3 0x1100090 kqread syslogd 75037 393274 1 0 3 0x100082 netio syslogd 5270 487761 1 0 3 0x100080 kqread resolvd 82694 138987 29513 77 3 0x100092 kqread dhcpleased 20547 337681 29513 77 3 0x100092 kqread dhcpleased 29513 7155 1 0 3 0x80 kqread dhcpleased 94009 33320 0 0 3 0x14200 bored smr 20179 309278 0 0 2 0x14200 zerothread 55160 420522 0 0 3 0x14200 aiodoned aiodoned 7789 345685 0 0 3 0x14200 syncer update 19634 150230 0 0 3 0x14200 cleaner cleaner 2827 281108 0 0 3 0x14200 reaper reaper 15479 15587 0 0 3 0x14200 pgdaemon pagedaemon 41341 291777 0 0 3 0x14200 bored viomb 55000 512833 0 0 3 0x40014200 acpi0 acpi0 33376 135948 0 0 3 0x40014200 idle1 76256 169075 0 0 3 0x14200 bored softnet3 63074 372471 0 0 3 0x14200 bored softnet2 1120 221626 0 0 3 0x14200 bored softnet1 48003 471779 0 0 3 0x14200 bored softnet0 32121 507426 0 0 3 0x14200 bored systqmp 80561 253547 0 0 3 0x14200 bored systq 23397 126811 0 0 3 0x14200 tmoslp softclockmp 31998 280919 0 0 3 0x40014200 tmoslp softclock 93660 354363 0 0 3 0x40014200 idle0 1 481081 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &kq->kq_lock r = 0 (0xfffffd806f2201c0) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 kqueue_scan+0x8b2 sys/kern/kern_event.c:1510 #4 sys_kevent+0x4b4 sys/kern/kern_event.c:1062 #5 syscall+0x5ae mi_syscall sys/sys/syscall_mi.h:183 [inline] #5 syscall+0x5ae sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 Process 3249 (syz-executor.1) thread 0xffff80002a24f800 (235744) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82dcc900) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x46f sys/kern/sched_bsd.c:470 #3 sleep_finish+0x19b sys/kern/kern_synch.c:414 #4 biowait+0x91 sys/kern/vfs_bio.c:1254 #5 bwrite+0x21c sys/kern/vfs_bio.c:766 #6 VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 #7 ufs_direnter+0x646 sys/ufs/ufs/ufs_lookup.c:833 #8 ufs_makeinode+0x499 sys/ufs/ufs/ufs_vnops.c:1779 #9 ufs_symlink+0x4b sys/ufs/ufs/ufs_vnops.c:1308 #10 VOP_SYMLINK+0xd4 sys/kern/vfs_vops.c:426 #11 dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1801 #12 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #12 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e5535f0) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 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:1201 #8 ffs_inode_alloc+0x1c5 sys/ufs/ffs/ffs_alloc.c:393 #9 ufs_makeinode+0xae sys/ufs/ufs/ufs_vnops.c:1743 #10 ufs_symlink+0x4b sys/ufs/ufs/ufs_vnops.c:1308 #11 VOP_SYMLINK+0xd4 sys/kern/vfs_vops.c:426 #12 dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1801 #13 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #13 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 Process 37829 (syz-executor.6) thread 0xffff80002a216560 (231437) exclusive rrwlock inode r = 0 (0xfffffd80641644d8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 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:1201 #8 ufs_lookup+0x1323 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #13 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b387f88) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #8 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 60299 (syz-executor.4) thread 0xffff80002a215d68 (141413) exclusive rrwlock inode r = 0 (0xfffffd8064164808) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 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:1201 #8 ufs_lookup+0x1323 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #13 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80673f23d0) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #8 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10209 6412K 6419K 166960K 11289 0 pcb 15 14K 16K 166960K 19 0 rtable 238 6K 7K 166960K 608 0 pf 29 8K 8K 166960K 29 0 ifaddr 44 15K 15K 166960K 46 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 3 1K 1K 166960K 3 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 50 0 iov 0 0K 16K 166960K 468 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1278 80K 80K 166960K 2361 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 56 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 663 0 dirhash 12 2K 2K 166960K 54 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 22 81K 117K 166960K 5489 0 sigio 0 0K 0K 166960K 678 0 proc 56 78K 103K 166960K 655 0 subproc 104 6K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 639 0 in_multi 99 7K 7K 166960K 138 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 784 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 341 87K 99K 166960K 55021 0 UVM aobj 69 3K 4K 166960K 84 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 97 0 NDP 11 0K 2K 166960K 27 0 temp 74 6772K 6900K 166960K 15645 0 kqueue 12 18K 31K 166960K 424 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 212 0 209 3 2 1 3 0 8 0 rtentry 112 117 0 5 4 0 4 4 0 8 0 unpcb 144 2335 0 2322 27 22 5 8 0 8 4 syncache 336 48 0 48 9 8 1 1 0 8 1 tcpqe 32 166 0 166 8 8 0 1 0 8 0 tcpcb 808 4499 0 4463 55 44 11 14 0 8 6 arp 120 19 0 0 1 0 1 1 0 8 0 ipq 40 9 0 9 3 3 0 1 0 8 0 ipqe 40 20 0 20 3 3 0 1 0 8 0 inpcb 392 6290 0 6247 82 70 12 20 0 8 6 nd6 136 29 0 4 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 461 0 6 29 0 29 29 0 8 0 art_table 32 462 0 6 4 0 4 4 0 8 0 art_node 16 116 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 624 0 614 1 0 1 1 0 8 0 shmpl 112 81 0 15 2 0 2 2 0 8 0 dirhash 1024 45 0 28 3 0 3 3 0 8 0 dino2pl 256 8509 0 7066 91 0 91 91 0 8 0 ffsino 272 8509 0 7066 97 0 97 97 0 8 0 nchpl 144 15182 0 13505 63 0 63 63 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 52669 0 52668 3 2 1 2 0 8 0 percpumem 16 46 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 45795 0 45795 23 22 1 8 1 8 1 plimitpl 152 3253 0 3230 6 4 2 2 0 8 1 sigapl 424 5790 0 5737 7 0 7 7 0 8 0 futexpl 64 68259 0 68257 1 0 1 1 0 8 0 knotepl 120 455 0 0 11 1 10 11 0 8 0 kqueuepl 216 2336 0 2328 24 19 5 6 0 8 4 pipepl 320 1609 0 1581 33 30 3 8 0 8 0 fdescpl 496 5771 0 5738 7 2 5 6 0 8 0 filepl 152 38481 0 38244 57 42 15 23 0 8 5 lockfpl 104 464 0 462 1 0 1 1 0 8 0 lockfspl 48 116 0 114 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 46 0 30 1 0 1 1 0 8 0 ucredpl 104 9003 0 8985 1 0 1 1 0 8 0 zombiepl 144 5738 0 5737 1 0 1 1 0 8 0 processpl 1136 5790 0 5737 5 0 5 5 0 8 0 procpl 680 15091 0 15019 12 4 8 9 0 8 1 sosppl 168 80 0 77 2 1 1 1 0 8 0 sockpl 584 9217 0 9161 67 56 11 19 0 8 5 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 11 0 0 2 0 2 2 0 8 0 mcl12k 12288 75 0 0 8 5 3 8 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 49 0 0 4 0 4 4 0 8 0 mcl2k2 2112 11 0 0 1 0 1 1 0 8 0 mcl2k 2048 258 0 0 32 3 29 32 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 812 0 0 50 1 49 49 0 8 0 bufpl 280 12533 0 6216 452 0 452 452 0 8 0 anonpl 24 634728 0 623375 141 60 81 96 0 186 0 amapchunkpl 152 176841 0 176028 75 37 38 51 0 158 3 amappl16 200 13513 0 13187 58 40 18 31 0 8 0 amappl15 192 42 0 40 1 0 1 1 0 8 0 amappl14 184 185 0 171 2 1 1 2 0 8 0 amappl13 176 11 0 11 3 3 0 1 0 8 0 amappl12 168 6402 0 6367 2 0 2 2 0 8 0 amappl11 160 66 0 56 1 0 1 1 0 8 0 amappl10 152 22 0 13 2 1 1 1 0 8 0 amappl9 144 194 0 193 1 0 1 1 0 8 0 amappl8 136 350 0 261 4 0 4 4 0 8 0 amappl7 128 200 0 179 2 0 2 2 0 8 0 amappl6 120 311 0 298 1 0 1 1 0 8 0 amappl5 112 184 0 176 1 0 1 1 0 8 0 amappl4 104 547 0 528 3 2 1 3 0 8 0 amappl3 96 34701 0 34624 5 2 3 4 0 8 0 amappl2 88 6465 0 6388 3 1 2 3 0 8 0 amappl1 80 29045 0 28520 22 9 13 22 0 8 0 amappl 88 54355 0 54139 12 5 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 83 0 15 2 0 2 2 0 8 0 uaddrrnd 24 5771 0 5738 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5771 0 5738 1 0 1 1 0 8 0 vmmpekpl 168 48240 0 48192 3 0 3 3 0 8 0 vmmpepl 168 344985 0 342687 155 44 111 121 0 357 1 vmsppl 448 5770 0 5738 5 0 5 5 0 8 0 rwobjpl 56 94022 0 86694 111 5 106 108 0 8 0 pdppl 4096 11549 0 11476 169 88 81 91 0 8 8 pvpl 32 45117 0 0 364 0 364 364 0 265 0 pmappl 248 5770 0 5738 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 639 0 209 14 1 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82d78ff0) at x86_ipi_db+0x1e 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+0x27 x86_bus_space_io_write_1(3f8,0,65) at x86_bus_space_io_write_1+0x35 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:1264 cnputc(65) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff828bc91c) at db_printf+0x89 sys/kern/subr_prf.c:498 db_ktrap(6,0,ffff80002f1327b0) at db_ktrap+0xb5 db_printtrap sys/arch/amd64/amd64/db_interface.c:98 [inline] db_ktrap(6,0,ffff80002f1327b0) at db_ktrap+0xb5 sys/arch/amd64/amd64/db_interface.c:127 kerntrap(ffff80002f1327b0) at kerntrap+0x143 sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff80002f1328b0) at fifo_write+0x52 sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd805be19638,ffff80002f132948,8,fffffd807f7d7478) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 end trace frame: 0xffff80002f1329e0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82d78ff0) at x86_ipi_db+0x1e 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+0x27 x86_bus_space_io_write_1(3f8,0,65) at x86_bus_space_io_write_1+0x35 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:1264 cnputc(65) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff828bc91c) at db_printf+0x89 sys/kern/subr_prf.c:498 db_ktrap(6,0,ffff80002f1327b0) at db_ktrap+0xb5 db_printtrap sys/arch/amd64/amd64/db_interface.c:98 [inline] db_ktrap(6,0,ffff80002f1327b0) at db_ktrap+0xb5 sys/arch/amd64/amd64/db_interface.c:127 kerntrap(ffff80002f1327b0) at kerntrap+0x143 sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff80002f1328b0) at fifo_write+0x52 sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd805be19638,ffff80002f132948,8,fffffd807f7d7478) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd805be19638,ffff80002a171000,fe,0,1,55ec1d88af86072f,ffff80002f132a70,fffffd805be19638,78) at vn_rdwr+0xed sys/kern/vfs_vnops.c:324 ufs_symlink(ffff80002f132a70) at ufs_symlink+0x12a sys/ufs/ufs/ufs_vnops.c:1324 VOP_SYMLINK(fffffd806e9c32e8,ffff80002f132bf0,ffff80002f132c20,ffff80002f132b20,ffff80002a171000) at VOP_SYMLINK+0xd4 sys/kern/vfs_vops.c:426 dosymlinkat(ffff80002a24f800,20000000,ffffff9c,20000280) at dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1801 syscall(ffff80002f132da0) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002f132da0) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70f0a37a0e0, count: -20 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x660 savectx() at savectx+0xae end of kernel end trace frame: 0x245f89410, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x245f89410, count: -1