*cpu0: uvm_fault(0xfffff2806cf01d70, 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: 0x797164e3f550, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2d8860 rbx 0 rdx 0 rcx 0xffff80003abb9a10 rax 0x2a r8 0xffff80002a2d8790 r9 0x4 r10 0x84ea900dca00ceff r11 0x75cbbac3bd6eebe3 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff826b94c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a2d87e0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (sh) tid=204076 pid=19455 tcnt=1 stat=onproc flags process=100000 proc=0 runpri=80, usrpri=80, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003abb9248,0xffffffff83a54c08 process=0xffff80002a37d828 user=0xffff80002a2d3000, vmspace=0xfffff28071381d78 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 *19455 204076 58307 0 7 0x100000 0 sh 58307 241639 10674 0 3 0x100002 0x88 sigsusp sh 77804 11680 77698 0 2 0 0 syz-executor 77804 176329 77698 0 3 0 0x4000080 wsevent_r syz-executor 77804 281657 77698 0 3 0 0x4000080 fsleep syz-executor 65373 25751 93156 0 2 0 0 syz-executor 65373 309783 93156 0 7 0 0x4000000 syz-executor 65373 470261 93156 0 3 0 0x4000080 fsleep syz-executor 30734 292284 51098 0 2 0 0 syz-executor 30734 505796 51098 0 3 0 0x4000080 fsleep syz-executor 10674 211551 39937 0 3 0x2 0x80 wait syz-executor 51098 45517 39937 0 3 0x2 0x80 nanoslp syz-executor 77698 255225 39937 0 3 0x2 0x80 nanoslp syz-executor 80826 130500 39937 0 3 0x2 0x80 piperd syz-executor 52544 123965 0 0 3 0x14000 0x200 acct acct 74350 171901 21420 0 3 0x100002 0x80 sbwait arp 21420 48750 40906 0 3 0x100002 0x88 sigsusp sh 93156 113188 39937 0 2 0x2 0xc80 syz-executor 23965 37802 39937 0 3 0x2 0x80 piperd syz-executor 40906 324082 39937 0 3 0x2 0x80 wait syz-executor 39937 357261 80585 0 3 0x2 0x80 wait syz-executor 80585 255790 38029 0 3 0x100002 0x88 sigsusp ksh 38029 61736 33282 0 3 0x10 0x88 kqread sshd-session 33282 502112 63468 0 3 0x12 0x80 kqread sshd-session 54585 265494 1 0 3 0x100003 0x80 ttyin getty 63468 413388 1 0 3 0 0x88 kqread sshd 35564 257412 42496 74 3 0x1100012 0x80 bpf pflogd 42496 140631 1 0 3 0 0x80 sbwait pflogd 42925 163864 36745 73 3 0x1100010 0x80 kqread syslogd 36745 511456 1 0 3 0x100002 0x80 sbwait syslogd 97819 459431 1 0 3 0x100000 0x80 kqread resolvd 5147 411693 20180 77 3 0x100012 0x80 kqread dhcpleased 51142 351588 20180 77 3 0x100012 0x80 kqread dhcpleased 20180 350438 1 0 3 0 0x80 kqread dhcpleased 97474 506691 0 0 3 0x14000 0x200 bored smr 56477 112259 0 0 2 0x14000 0x200 zerothread 46523 80744 0 0 3 0x14000 0x200 aiodoned aiodoned 82151 522702 0 0 3 0x14000 0x200 syncer update 55043 188496 0 0 3 0x14000 0x200 cleaner cleaner 34243 445166 0 0 3 0x14000 0x200 reaper reaper 67596 145693 0 0 3 0x14000 0x200 pgdaemon pagedaemon 41269 255364 0 0 3 0x14000 0x200 bored viomb 13114 120586 0 0 3 0x14000 0x40000200 acpi0 acpi0 93781 182290 0 0 3 0x14000 0x40000200 idle1 56369 397479 0 0 3 0x14000 0x200 bored softnet1 23827 328136 0 0 3 0x14000 0x200 bored softnet0 54020 229106 0 0 3 0x14000 0x200 bored systqmp 22468 162596 0 0 3 0x14000 0x200 bored systq 19364 492825 0 0 3 0x14000 0x200 tmoslp softclockmp 4737 459730 0 0 3 0x14000 0x40000200 tmoslp softclock 6038 524280 0 0 3 0x14000 0x40000200 idle0 1 318388 0 0 3 0x40000002 0x80 wait init 0 0 -1 0 3 0x10010000 0x200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffff28008ca6bf8) #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+0x83a pmap_enter_pv sys/arch/amd64/amd64/pmap.c:1104 [inline] #2 pmap_enter+0x83a sys/arch/amd64/amd64/pmap.c:2888 #3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #8 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffff2806cd9bd10) #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_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #8 recall_trap+0x8 Process 19455 (sh) thread 0xffff80003abb9a10 (204076) shared rwlock uobjlk r = 0 (0xfffff280713ef4c8) #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 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #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 shared rwlock vmmaplk r = 0 (0xfffff28071381e78) #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 &(curpg)->mdpage.pv_mtx r = 0 (0xfffff28008ca6bf8) #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+0x83a pmap_enter_pv sys/arch/amd64/amd64/pmap.c:1104 [inline] #2 pmap_enter+0x83a sys/arch/amd64/amd64/pmap.c:2888 #3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #8 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffff2806cd9bd10) #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_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #8 recall_trap+0x8 Process 65373 (syz-executor) thread 0xffff800037fb0fc0 (309783) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a7a440) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11125 12239K 12339K 166960K 12561 0 pcb 17 13K 13K 166960K 76 0 rtable 225 7K 8K 166960K 938 0 pf 42 19K 21K 166960K 202 0 ifaddr 39 6K 7K 166960K 130 0 ifgroup 55 2K 2K 166960K 160 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 126 0 ioctlops 0 0K 4K 166960K 1703 0 iov 0 0K 16K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1356 85K 85K 166960K 1878 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 42 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 61K 244K 166960K 780 0 sigio 0 0K 0K 166960K 6 0 proc 72 115K 180K 166960K 1097 0 subproc 72 4K 4K 166960K 243 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 25 0 in_multi 79 5K 6K 166960K 307 0 ether_multi 1 0K 0K 166960K 2 0 mrt 2 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 403 1791K 1791K 166960K 403 0 exec 0 0K 1K 166960K 680 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 219 170K 178K 166960K 7722 0 UVM aobj 13 2K 2K 166960K 14 0 pinsyscall 43 86K 106K 166960K 2441 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 12 0K 1K 166960K 87 0 temp 46 9120K 9184K 166960K 19681 0 kqueue 13 20K 28K 166960K 88 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 120 100 0 96 1 0 1 1 0 8 0 rtentry 176 316 0 217 5 0 5 5 0 8 0 unpcb 144 269 0 252 5 3 2 4 0 8 1 syncache 336 9 0 9 2 1 1 1 0 8 1 tcpcb 736 82 0 78 1 0 1 1 0 8 0 arp 136 57 0 39 1 0 1 1 0 8 0 inpcb 328 525 0 518 9 2 7 7 0 8 6 nd6 152 77 0 57 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 kcovpl 48 27 0 19 1 0 1 1 0 8 0 ppxss 1192 3 0 3 1 0 1 1 0 8 1 pppxif 1576 3 0 3 1 0 1 1 0 8 1 pfstscr 40 4 0 2 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 2 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 2 0 1 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 1 0 1 0 8 0 pfstlim 224 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 6 0 0 1 0 1 1 0 8 0 pfqueue 320 2 0 0 1 0 1 1 0 8 0 pfstitem 24 63 0 8 1 0 1 1 0 8 0 pfstkey 128 63 0 8 2 0 2 2 0 8 0 pfstate 448 60 0 7 7 0 7 7 0 8 0 pfrule 1360 31 0 23 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1275 0 862 31 2 29 29 0 8 0 art_table 40 1276 0 862 5 0 5 5 0 8 0 art_node 32 316 0 226 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 6 1 0 1 1 0 8 0 semupl 112 3 0 3 2 1 1 1 0 8 1 semapl 72 36 0 26 1 0 1 1 0 8 0 shmpl 112 11 0 1 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2193 0 690 94 0 94 94 0 8 0 ffsino 296 2193 0 690 116 0 116 116 0 8 0 nchpl 144 2891 0 1136 66 0 66 66 0 8 0 vnodes 216 2703 0 0 151 0 151 151 0 8 0 namei 1024 11029 0 11029 2 1 1 2 0 8 1 percpumem 16 79 0 28 1 0 1 1 0 8 0 kstatmem 264 77 0 50 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 9945 0 9945 11 4 7 8 1 8 7 plimitpl 152 165 0 148 1 0 1 1 0 8 0 sigapl 424 1079 0 1031 9 1 8 8 0 8 1 knotepl 120 385 0 0 12 0 12 12 0 8 0 kqueuepl 224 178 0 168 5 0 5 5 0 8 4 pipepl 344 210 0 183 3 0 3 3 0 8 0 fdescpl 528 1042 0 1011 3 0 3 3 0 8 0 filepl 160 4520 0 4308 16 1 15 15 0 8 4 lockfpl 104 194 0 192 1 0 1 1 0 8 0 lockfspl 48 82 0 80 1 0 1 1 0 8 0 sessionpl 144 64 0 55 1 0 1 1 0 8 0 pgrppl 48 159 0 142 1 0 1 1 0 8 0 ucredpl 104 706 0 693 1 0 1 1 0 8 0 zombiepl 144 1032 0 1031 1 0 1 1 0 8 0 processpl 1232 1079 0 1031 6 0 6 6 0 8 0 procpl 664 1688 0 1635 7 0 7 7 0 8 0 sockpl 752 946 0 918 13 3 10 10 0 8 7 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k 2048 36 0 0 5 0 5 5 0 8 0 mextrefs 64 39 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 238 0 0 15 0 15 15 0 8 0 bufpl 272 3140 0 105 203 0 203 203 0 8 0 anonpl 32 7674 0 0 63 1 62 62 0 247 0 amapchunkpl 152 22601 0 22176 25 0 25 25 0 158 6 amappl16 200 2240 0 2219 20 9 11 14 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 664 0 659 1 0 1 1 0 8 0 amappl13 176 166 0 153 1 0 1 1 0 8 0 amappl12 168 1374 0 1345 2 0 2 2 0 8 0 amappl11 160 30 0 30 1 1 0 1 0 8 0 amappl10 152 60 0 46 1 0 1 1 0 8 0 amappl9 144 276 0 276 1 1 0 1 0 8 0 amappl8 136 177 0 174 1 0 1 1 0 8 0 amappl7 128 187 0 172 1 0 1 1 0 8 0 amappl6 120 345 0 342 1 0 1 1 0 8 0 amappl5 112 115 0 104 1 0 1 1 0 8 0 amappl4 104 354 0 333 1 0 1 1 0 8 0 amappl3 96 4241 0 4153 3 0 3 3 0 8 0 amappl2 88 1099 0 1022 2 0 2 2 0 8 0 amappl1 80 14336 0 13707 15 1 14 15 0 8 0 amappl 88 6600 0 6459 4 0 4 4 0 92 0 uvmvnodes 80 116 0 0 3 0 3 3 0 8 0 dma32768 32768 1 0 1 1 1 0 1 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 128 254 0 254 2 2 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 13 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1042 0 1011 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1042 0 1011 1 0 1 1 0 8 0 vmmpekpl 168 9831 0 9781 3 0 3 3 0 8 0 vmmpepl 168 73871 0 72040 97 2 95 97 0 357 0 vmsppl 488 1041 0 1011 5 0 5 5 0 8 0 rwobjpl 80 22627 0 21537 31 3 28 29 0 8 0 pdppl 4096 2091 0 2022 121 46 75 85 0 8 6 pvpl 32 15286 0 0 125 1 124 124 0 265 0 pmappl 256 1041 0 1011 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 512 0 54 14 0 14 14 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83984ff0) 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,29) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,29) at comcnputc+0x250 sys/dev/ic/com.c:1274 cnputc(29) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(29) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83462089) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83523e11) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002eb9bae0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002eb9bae0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800037fb0fc0,fffff280749d92b8,ffff80002eb9bca0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 end trace frame: 0xffff80002eb9bd10, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83984ff0) 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,29) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,29) at comcnputc+0x250 sys/dev/ic/com.c:1274 cnputc(29) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(29) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83462089) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83523e11) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002eb9bae0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002eb9bae0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800037fb0fc0,fffff280749d92b8,ffff80002eb9bca0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff800037fb0fc0,ffff80002eb9bdf0,ffff80002eb9bd40) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff80002eb9bdf0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002eb9bdf0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb8909936f70, count: -17 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: 0x797164e3f550, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x797164e3f550, count: -1