*cpu1: uvm_fault(0xfffff1007338d3e8, 0x98, 0, 1) -> e ddb{0}> trace alltraps_kern_meltdown() at alltraps_kern_meltdown+0xb8 _copyin() at _copyin+0x5b syscall(ffff80003c3d5b00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d5b00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3379d522ef0, count: -4 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c3d5740 rbx 0 rdx 0xffff8000015d3ac0 rcx 0xffff8000397b6550 rax 0x2a r8 0xffff80003c3d5670 r9 0x8080808080808080 r10 0x7d67081d5143940a r11 0x24c9efc18973c7bc r12 0xffff8000397b6550 r13 0x2000004ccf40 r14 0x100 r15 0xffff80003c3d5b00 rip 0xffffffff8342520b alltraps_kern_meltdown+0xb8 cs 0x8 rflags 0x246 rsp 0xffff80003c3d56c0 ss 0x10 alltraps_kern_meltdown+0xb8: movl %ebx,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=152827 pid=54753 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000397b7248,0xffff8000397b62c8 process=0xffff80003c3db9e0 user=0xffff80003c3d0000, vmspace=0xfffff1007338dd70 estcpu=36, cpticks=78, pctcpu=0.0, user=0, sys=78, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74567 97048 9043 0 2 0 syz-executor 74567 239827 9043 0 7 0x4000000 syz-executor 74567 369556 9043 0 3 0x4000080 fsleep syz-executor 94433 15356 27492 0 2 0 syz-executor 94433 497258 27492 0 2 0x4000001 syz-executor 94433 96006 27492 0 3 0x4000080 fsleep syz-executor 94433 472201 27492 0 3 0x4000080 fsleep syz-executor 54753 272420 9376 60928 2 0x11 syz-executor *54753 152827 9376 60928 7 0x4000010 syz-executor 73365 320088 95673 0 3 0x80 nanoslp syz-executor 73365 16860 95673 0 2 0x4000001 syz-executor 73365 70806 95673 0 3 0x4000080 fsleep syz-executor 73365 249889 95673 0 2 0x4000001 syz-executor 90648 148449 35012 0 3 0x100082 sbwait arp 35012 374465 12044 0 3 0x10008a sigsusp sh 27492 356608 60024 0 2 0x3 syz-executor 3075 48345 60024 0 2 0x10000003 syz-executor 44281 417568 60024 0 2 0x10000003 syz-executor 12044 134095 60024 0 3 0x82 wait syz-executor 9043 414341 60024 0 3 0x82 nanoslp syz-executor 95673 100604 60024 0 2 0x3 syz-executor 9376 281201 60024 0 2 0x3 syz-executor 57321 239283 60024 0 2 0x10000c82 syz-executor 60024 390135 99827 0 3 0x82 kqread syz-executor 99827 149560 82703 0 3 0x10008a sigsusp ksh 82703 444143 87798 0 3 0x98 kqread sshd-session 87798 443830 33095 0 3 0x92 kqread sshd-session 45360 435673 1 0 3 0x100083 ttyin getty 33095 384494 1 0 3 0x88 kqread sshd 30586 375475 40086 74 3 0x1100092 bpf pflogd 40086 457592 1 0 3 0x80 sbwait pflogd 15931 240471 60033 73 3 0x1100090 kqread syslogd 60033 512335 1 0 3 0x100082 sbwait syslogd 2313 106651 1 0 2 0x100080 resolvd 17589 235951 99941 77 3 0x100092 kqread dhcpleased 6671 109914 99941 77 3 0x100092 kqread dhcpleased 99941 509972 1 0 3 0x80 kqread dhcpleased 27865 365673 0 0 3 0x14200 bored smr 48479 27287 0 0 3 0x14200 pgzero zerothread 52901 124014 0 0 3 0x14200 aiodoned aiodoned 60035 413456 0 0 3 0x14200 syncer update 87118 408211 0 0 3 0x14200 cleaner cleaner 6468 226047 0 0 3 0x14200 reaper reaper 83984 126515 0 0 3 0x14200 pgdaemon pagedaemon 16481 109504 0 0 3 0x14200 bored viomb 84819 518032 0 0 3 0x40014200 acpi0 acpi0 3627 261583 0 0 3 0x40014200 idle1 4034 79228 0 0 3 0x14200 bored softnet1 25843 425955 0 0 2 0x14200 softnet0 17309 250457 0 0 3 0x14200 bored systqmp 75404 518165 0 0 3 0x14200 bored systq 11247 423270 0 0 3 0x14200 tmoslp softclockmp 78440 176266 0 0 3 0x40014200 tmoslp softclock 28538 378086 0 0 3 0x40014200 idle0 1 199901 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffff10073390c10) #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 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 #7 alltraps_kern_meltdown+0x7b #8 _copyin+0x5b #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 Process 74567 (syz-executor) thread 0xffff8000fffee2b0 (239827) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a80780) #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 54753 (syz-executor) thread 0xffff8000397b6550 (152827) exclusive rwlock amaplk r = 0 (0xfffff10066d09610) #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_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #5 kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 #6 alltraps_kern_meltdown+0x7b #7 _copyin+0x5b #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 shared rwlock vmmaplk r = 0 (0xfffff1007338de70) #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 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 #7 alltraps_kern_meltdown+0x7b #8 _copyin+0x5b #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 exclusive mutex &pmap->pm_mtx r = 0 (0xfffff10073390c10) #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 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 #7 alltraps_kern_meltdown+0x7b #8 _copyin+0x5b #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11056 12087K 12151K 166960K 12161 0 pcb 19 12K 12K 166960K 23 0 rtable 221 6K 6K 166960K 337 0 pf 37 18K 19K 166960K 49 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 57 2K 2K 166960K 57 0 sysctl 1 1K 9K 166960K 5 0 counters 72 37K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 1487 0 iov 0 0K 4K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1293 81K 81K 166960K 1369 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 142 0 proc 70 115K 180K 166960K 548 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1 0 in_multi 89 6K 6K 166960K 89 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 37 175K 175K 166960K 37 0 exec 0 0K 1K 166960K 393 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 235 169K 176K 166960K 3326 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 42 84K 105K 166960K 1329 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 27 1K 1K 166960K 27 0 temp 37 9114K 9120K 166960K 4737 0 kqueue 14 22K 22K 166960K 27 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 39 0 35 1 0 1 1 0 8 0 rtentry 176 103 0 1 5 0 5 5 0 8 0 unpcb 144 46 0 29 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 10 0 5 1 0 1 1 0 8 0 arp 136 17 0 0 1 0 1 1 0 8 0 inpcb 328 79 0 68 2 0 2 2 0 8 1 nd6 152 21 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 1 0 0 1 0 1 1 0 8 0 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 18 0 0 1 0 1 1 0 8 0 pfstkey 128 20 0 2 1 0 1 1 0 8 0 pfstate 448 19 0 1 3 0 3 3 0 8 1 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 411 0 0 26 0 26 26 0 8 0 art_table 40 412 0 0 5 0 5 5 0 8 0 art_node 32 103 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 2 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1583 0 110 93 0 93 93 0 8 0 ffsino 296 1583 0 110 114 0 114 114 0 8 0 nchpl 144 1800 0 91 64 0 64 64 0 8 0 vnodes 216 1678 0 0 94 0 94 94 0 8 0 namei 1024 5585 0 5585 2 0 2 2 0 8 2 percpumem 16 51 0 0 1 0 1 1 0 8 0 kstatmem 264 29 0 0 2 0 2 2 0 8 0 scxspl 216 6391 0 6391 4 3 1 3 1 8 1 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 471 0 422 7 0 7 7 0 8 0 knotepl 120 50 0 0 2 0 2 2 0 8 0 kqueuepl 224 28 0 13 1 0 1 1 0 8 0 pipepl 344 131 0 104 3 0 3 3 0 8 0 fdescpl 528 455 0 425 3 0 3 3 0 8 0 filepl 160 1652 0 1425 10 0 10 10 0 8 0 lockfpl 104 20 0 15 1 0 1 1 0 8 0 lockfspl 48 12 0 7 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 97 0 82 1 0 1 1 0 8 0 zombiepl 144 425 0 422 1 0 1 1 0 8 0 processpl 1232 471 0 422 5 0 5 5 0 8 0 procpl 664 498 0 440 6 0 6 6 0 8 1 sockpl 752 164 0 132 4 0 4 4 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 172 0 0 11 0 11 11 0 8 0 bufpl 272 2497 0 105 160 0 160 160 0 8 0 anonpl 32 4472 0 0 37 0 37 37 0 246 0 amapchunkpl 152 8991 0 8536 21 0 21 21 0 158 2 amappl16 200 2010 0 1920 5 0 5 5 0 8 0 amappl15 192 6 0 5 1 0 1 1 0 8 0 amappl14 184 440 0 438 1 0 1 1 0 8 0 amappl13 176 126 0 113 1 0 1 1 0 8 0 amappl12 168 731 0 701 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 0 1 1 0 8 1 amappl10 152 90 0 76 1 0 1 1 0 8 0 amappl9 144 275 0 275 1 0 1 1 0 8 1 amappl8 136 101 0 99 1 0 1 1 0 8 0 amappl7 128 148 0 134 1 0 1 1 0 8 0 amappl6 120 149 0 147 1 0 1 1 0 8 0 amappl5 112 108 0 97 1 0 1 1 0 8 0 amappl4 104 295 0 275 1 0 1 1 0 8 0 amappl3 96 1531 0 1425 4 0 4 4 0 8 1 amappl2 88 559 0 499 2 0 2 2 0 8 0 amappl1 80 10562 0 9940 15 0 15 15 0 8 1 amappl 88 2575 0 2417 4 0 4 4 0 92 0 uvmvnodes 80 101 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 455 0 425 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 455 0 425 1 0 1 1 0 8 0 vmmpekpl 168 5791 0 5757 2 0 2 2 0 8 0 vmmpepl 168 39078 0 37174 90 0 90 90 0 357 1 vmsppl 488 454 0 425 5 0 5 5 0 8 0 rwobjpl 80 15061 0 13930 25 1 24 25 0 8 0 pdppl 4096 917 0 850 99 14 85 87 0 8 18 pvpl 32 10298 0 0 84 0 84 84 0 265 0 pmappl 256 454 0 425 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 429 0 17 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace alltraps_kern_meltdown() at alltraps_kern_meltdown+0xb8 _copyin() at _copyin+0x5b syscall(ffff80003c3d5b00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d5b00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3379d522ef0, count: -4 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) 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(800,65) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,65) at comcnputc+0x250 sys/dev/ic/com.c:1274 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8345c86a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351f6d7) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003bfbd020,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003bfbd020) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff8000fffee2b0,fffff1005c1006d0,ffff80003bfbd200) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 end trace frame: 0xffff80003bfbd270, count: 0 ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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(800,65) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,65) at comcnputc+0x250 sys/dev/ic/com.c:1274 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8345c86a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351f6d7) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003bfbd020,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003bfbd020) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff8000fffee2b0,fffff1005c1006d0,ffff80003bfbd200) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff8000fffee2b0,ffff80003bfbd350,ffff80003bfbd2a0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff80003bfbd350) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bfbd350) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x962ba8d71e0, count: -17