*cpu0: uvm_fault(0xfffff7806cd7cb90, 0x98, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70b702006960, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002ff85a70 rbx 0 rdx 0 rcx 0xffff800039bb94e0 rax 0x2a r8 0xffff80002ff859a0 r9 0x3 r10 0x85b3f76cb51da088 r11 0xb9af4bda0be77765 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82f754c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002ff859f0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (sh) tid=487293 pid=66258 tcnt=1 stat=onproc flags process=100002 proc=0 runpri=75, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800039bb8a80,0xffffffff83b0af18 process=0xffff80003c3d7510 user=0xffff80002ff80000, vmspace=0xfffff7806cf497b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND *66258 487293 45080 0 7 0x100002 0 sh 23466 197345 38730 0 2 0 0 syz-executor 23466 122244 38730 0 3 0 0x4000080 fsleep syz-executor 23466 418176 38730 0 3 0 0x4000080 fsleep syz-executor 13098 180107 56127 0 2 0 0 syz-executor 13098 94021 56127 0 3 0 0x4000080 fsleep syz-executor 68846 272662 53629 0 2 0 0 syz-executor 68846 387227 53629 0 3 0 0x4000080 fifor syz-executor 68846 121456 53629 0 3 0 0x4000080 fsleep syz-executor 68846 215099 53629 0 3 0 0x4000080 fsleep syz-executor 5653 104403 85702 0 2 0 0 syz-executor 5653 217644 85702 0 3 0 0x4000080 fsleep syz-executor 5653 470231 85702 0 3 0 0x4000080 fsleep syz-executor 67302 389972 47906 0 2 0 0 syz-executor 67302 321424 47906 0 3 0 0x4000080 fsleep syz-executor 67302 53361 47906 0 3 0 0x4000080 fsleep syz-executor 67302 5422 47906 0 3 0 0x4000080 fsleep syz-executor 845 252331 9591 0 2 0 0 syz-executor 845 233115 9591 0 7 0 0x4000000 syz-executor 845 12040 9591 0 3 0 0x4000080 fsleep syz-executor 845 392768 9591 0 3 0 0x4000080 fsleep syz-executor 45080 432294 41111 0 3 0x2 0x80 wait syz-executor 70530 413656 0 0 3 0x14000 0x200 acct acct 38730 337641 41111 0 3 0x2 0x80 nanoslp syz-executor 9591 11260 41111 0 3 0x2 0x80 nanoslp syz-executor 28278 459806 41111 0 2 0x2 0 syz-executor 53629 396474 41111 0 3 0x2 0x80 nanoslp syz-executor 56127 9292 41111 0 2 0x2 0xc80 syz-executor 47906 313366 41111 0 3 0x2 0x80 nanoslp syz-executor 85702 390235 41111 0 3 0x2 0x80 nanoslp syz-executor 41111 274481 82849 0 3 0x2 0x80 kqread syz-executor 82849 265322 4256 0 3 0x100002 0x88 sigsusp ksh 4256 447898 47394 0 3 0x10 0x88 kqread sshd-session 47394 207546 31418 0 3 0x12 0x80 kqread sshd-session 72660 144484 1 0 3 0x100003 0x80 ttyin getty 31418 476816 1 0 3 0 0x88 kqread sshd 24695 343208 1546 74 3 0x1100012 0x80 bpf pflogd 1546 246167 1 0 3 0 0x80 sbwait pflogd 73781 280038 15602 73 3 0x1100010 0x80 kqread syslogd 15602 437693 1 0 3 0x100002 0x80 sbwait syslogd 88809 216637 1 0 3 0x100000 0x80 kqread resolvd 96194 369030 51234 77 3 0x100012 0x80 kqread dhcpleased 85646 123509 51234 77 3 0x100012 0x80 kqread dhcpleased 51234 473426 1 0 3 0 0x80 kqread dhcpleased 59967 503221 0 0 3 0x14000 0x200 bored smr 26383 508800 0 0 2 0x14000 0x200 zerothread 98879 153655 0 0 3 0x14000 0x200 aiodoned aiodoned 37021 33470 0 0 3 0x14000 0x200 syncer update 67847 265974 0 0 3 0x14000 0x200 cleaner cleaner 69407 57790 0 0 3 0x14000 0x200 reaper reaper 30723 425362 0 0 3 0x14000 0x200 pgdaemon pagedaemon 81586 517455 0 0 3 0x14000 0x200 bored viomb 94543 70594 0 0 3 0x14000 0x40000200 acpi0 acpi0 63333 18529 0 0 3 0x14000 0x40000200 idle1 28056 26124 0 0 3 0x14000 0x200 bored softnet1 44073 370493 0 0 3 0x14000 0x200 bored softnet0 22525 249513 0 0 3 0x14000 0x200 bored systqmp 91032 65856 0 0 3 0x14000 0x200 bored systq 35345 457649 0 0 3 0x14000 0x200 tmoslp softclockmp 5806 209768 0 0 3 0x14000 0x40000200 tmoslp softclock 64629 293141 0 0 3 0x14000 0x40000200 idle0 1 72548 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffff7806cd53610) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777 #3 uvm_fault_lower+0x5d6 sys/uvm/uvm_fault.c:1504 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 66258 (sh) thread 0xffff800039bb94e0 (487293) exclusive rwlock amaplk r = 0 (0xfffff7806cd85e88) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffff7806cf498b8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffff7806cd53610) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777 #3 uvm_fault_lower+0x5d6 sys/uvm/uvm_fault.c:1504 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 845 (syz-executor) thread 0xffff80003c3d2558 (233115) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a4dc00) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 Process 28278 (syz-executor) thread 0xffff800045fefca0 (459806) exclusive rrwlock inode r = 0 (0xfffff78060ef10c8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff7806d207680) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3048 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11098 12227K 12533K 166960K 12349 0 pcb 22 12K 12K 166960K 47 0 rtable 239 8K 9K 166960K 398 0 pf 41 19K 24K 166960K 73 0 ifaddr 41 7K 7K 166960K 48 0 ifgroup 55 2K 2K 166960K 61 0 sysctl 1 1K 9K 166960K 6 0 counters 70 37K 37K 166960K 74 0 ioctlops 0 0K 4K 166960K 1506 0 iov 0 0K 12K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1325 83K 83K 166960K 1465 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 6 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 61K 93K 166960K 217 0 sigio 0 0K 0K 166960K 2 0 proc 72 115K 180K 166960K 580 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 8 0 in_multi 89 6K 6K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 417 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 245 168K 177K 166960K 3794 0 UVM aobj 11 2K 2K 166960K 11 0 pinsyscall 42 84K 102K 166960K 1432 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 12 0K 1K 166960K 30 0 temp 35 9114K 9130K 166960K 6579 0 kqueue 15 22K 26K 166960K 44 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 44 0 41 1 0 1 1 0 8 0 rtentry 176 116 0 12 6 0 6 6 0 8 0 unpcb 144 127 0 107 3 0 3 3 0 8 2 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 35 0 29 1 0 1 1 0 8 0 arp 136 20 0 2 1 0 1 1 0 8 0 inpcb 328 207 0 158 5 0 5 5 0 8 0 nd6 152 25 0 3 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 1 0 1 1 0 1 1 0 8 1 pfstscr 40 6 0 5 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 0 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pfstitem 24 31 0 2 1 0 1 1 0 8 0 pfstkey 128 35 0 6 1 0 1 1 0 8 0 pfstate 448 31 0 3 4 0 4 4 0 8 0 pfrule 1360 24 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 465 0 44 29 0 29 29 0 8 1 art_table 40 466 0 44 5 0 5 5 0 8 0 art_node 32 116 0 21 1 0 1 1 0 8 0 semapl 72 3 0 1 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1681 0 210 93 0 93 93 0 8 0 ffsino 296 1681 0 210 114 0 114 114 0 8 0 nchpl 144 1985 0 280 64 0 64 64 0 8 0 vnodes 216 1859 0 0 104 0 104 104 0 8 0 namei 1024 6242 0 6241 1 0 1 1 0 8 0 percpumem 16 53 0 2 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 31 0 4 2 0 2 2 0 8 0 scxspl 216 6865 0 6865 4 3 1 3 1 8 1 plimitpl 152 38 0 21 1 0 1 1 0 8 0 sigapl 424 545 0 497 7 0 7 7 0 8 1 knotepl 120 286 0 0 9 0 9 9 0 8 0 kqueuepl 224 47 0 35 1 0 1 1 0 8 0 pipepl 344 135 0 108 3 0 3 3 0 8 0 fdescpl 528 528 0 497 3 0 3 3 0 8 0 filepl 160 2164 0 1873 13 0 13 13 0 8 0 lockfpl 104 38 0 36 1 0 1 1 0 8 0 lockfspl 48 19 0 17 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 134 0 121 1 0 1 1 0 8 0 zombiepl 144 497 0 497 1 0 1 1 0 8 1 processpl 1232 545 0 497 5 0 5 5 0 8 0 procpl 664 689 0 627 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 380 0 308 11 0 11 11 0 8 3 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl9k128 9344 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 1 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mextrefs 64 20 0 0 1 0 1 1 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 185 0 0 12 0 12 12 0 8 0 bufpl 272 2504 0 105 160 0 160 160 0 8 0 anonpl 32 3865 0 0 32 0 32 32 0 247 0 amapchunkpl 152 10839 0 10319 29 0 29 29 0 158 7 amappl16 200 1700 0 1677 6 3 3 5 0 8 0 amappl15 192 4 0 3 1 0 1 1 0 8 0 amappl14 184 457 0 455 1 0 1 1 0 8 0 amappl13 176 126 0 114 1 0 1 1 0 8 0 amappl12 168 887 0 857 2 0 2 2 0 8 0 amappl11 160 8 0 7 1 0 1 1 0 8 0 amappl10 152 93 0 79 1 0 1 1 0 8 0 amappl9 144 275 0 275 1 1 0 1 0 8 0 amappl8 136 110 0 108 1 0 1 1 0 8 0 amappl7 128 150 0 136 1 0 1 1 0 8 0 amappl6 120 169 0 167 1 0 1 1 0 8 0 amappl5 112 99 0 89 1 0 1 1 0 8 0 amappl4 104 303 0 284 1 0 1 1 0 8 0 amappl3 96 1910 0 1803 3 0 3 3 0 8 0 amappl2 88 666 0 590 2 0 2 2 0 8 0 amappl1 80 10904 0 10296 15 0 15 15 0 8 2 amappl 88 3021 0 2851 5 0 5 5 0 92 0 uvmvnodes 80 100 0 0 3 0 3 3 0 8 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 528 0 497 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 528 0 497 1 0 1 1 0 8 0 vmmpekpl 168 6399 0 6360 2 0 2 2 0 8 0 vmmpepl 168 43180 0 41273 88 0 88 88 0 357 0 vmsppl 488 527 0 497 5 0 5 5 0 8 0 rwobjpl 80 15551 0 14488 24 0 24 24 0 8 1 pdppl 4096 1063 0 994 105 32 73 85 0 8 4 pvpl 32 10384 0 0 84 0 84 84 0 265 0 pmappl 256 527 0 497 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 439 0 35 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8398bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,a) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff834604ef) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83525983) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c401240,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c401240) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c4013f0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8398bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,a) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff834604ef) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83525983) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c401240,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c401240) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3d2558,fffff780707237e0,ffff80003c401420) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff80003c3d2558,ffff80003c401570,ffff80003c4014c0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80003c401570) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c401570) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x401f11758e0, count: -18 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70b702006960, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70b702006960, count: -1