uvm_fault(fffffd807effa000,20000000,0,2) at uvm_fault+0x17c sys/uvm/uvm_fault.c:977 kpageflttrap(ffff8000220ed540,20000000) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000220ed540) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff8000220ed770) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000220ed770) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8155e4ffb40, count: -15 ddb{0}> show registers rdi 0xffff800022ec4000 rsi 0x4627 __ALIGN_SIZE+0x3627 rbp 0xffff8000220ecec0 rbx 0x3 rdx 0xffff800022ec4000 rcx 0x4626 __ALIGN_SIZE+0x3626 rax 0xffffffff81cddba7 db_enter+0x17 r8 0xffffffff81176cd1 witness_checkorder+0x1061 r9 0x5 r10 0x545385ce79c5b067 r11 0x3a79d4871ccb8645 r12 0 r13 0xfffffd806882df80 r14 0 r15 0xfffffd8002ce1600 rip 0xffffffff81cddba8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000220eceb0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=335024 stat=onproc flags process=0 proc=4000000 pri=74, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff80002123c000,0xffffffff82787b60 process=0xffff8000212361d0 user=0xffff8000220e8000, vmspace=0xfffffd807effa000 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 98481 386710 29815 0 7 0 syz-executor.0 98481 394051 29815 0 3 0x4000080 fsleep syz-executor.0 98481 121913 29815 0 3 0x4000080 fsleep syz-executor.0 *98481 335024 29815 0 7 0x4000000 syz-executor.0 29815 161652 37907 0 3 0x82 nanoslp syz-executor.0 52698 374356 37907 0 3 0x82 nanoslp syz-executor.1 23587 247670 1 0 3 0x100083 ttyin getty 11442 275517 0 0 3 0x14200 bored sosplice 37907 200499 33174 0 3 0x82 thrsleep syz-fuzzer 37907 474864 33174 0 3 0x4000082 thrsleep syz-fuzzer 37907 395531 33174 0 3 0x4000082 thrsleep syz-fuzzer 37907 487062 33174 0 3 0x4000082 thrsleep syz-fuzzer 37907 30731 33174 0 3 0x4000082 kqread syz-fuzzer 37907 496742 33174 0 3 0x4000082 thrsleep syz-fuzzer 37907 243283 33174 0 3 0x4000082 thrsleep syz-fuzzer 37907 195495 33174 0 3 0x4000082 thrsleep syz-fuzzer 33174 358780 14237 0 3 0x10008a sigsusp ksh 14237 29830 4473 0 3 0x92 select sshd 4473 223904 1 0 3 0x80 select sshd 54279 499071 71965 74 3 0x100092 bpf pflogd 71965 79552 1 0 3 0x80 netio pflogd 49028 215413 35575 73 3 0x100090 kqread syslogd 35575 285435 1 0 3 0x100082 netio syslogd 19113 28660 1 77 3 0x100090 poll dhclient 94613 385697 1 0 3 0x80 poll dhclient 57818 92719 0 0 3 0x14200 bored smr 61511 185996 0 0 2 0x14200 zerothread 14743 309177 0 0 3 0x14200 aiodoned aiodoned 48742 254124 0 0 3 0x14200 syncer update 42928 98085 0 0 3 0x14200 cleaner cleaner 60886 385534 0 0 3 0x14200 reaper reaper 96887 386616 0 0 3 0x14200 pgdaemon pagedaemon 58728 127758 0 0 3 0x14200 bored crynlk 15716 301593 0 0 3 0x14200 bored crypto 36117 62161 0 0 3 0x14200 bored viomb 85512 143365 0 0 3 0x40014200 acpi0 acpi0 91848 81804 0 0 3 0x40014200 idle1 51404 312826 0 0 3 0x14200 bored softnet 5010 335212 0 0 3 0x14200 bored systqmp 19985 352291 0 0 3 0x14200 bored systq 11694 140098 0 0 3 0x40014200 bored softclock 7972 390268 0 0 3 0x40014200 idle0 1 469522 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 98481 (syz-executor.0) thread 0xffff80002123ca80 (335024) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828c3190) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 kpageflttrap+0x1f1 sys/arch/amd64/amd64/trap.c:265 #2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 #3 alltraps_kern_meltdown+0x7b #4 copyout+0x53 #5 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #6 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xfffffd807d1ac068) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 dopipe+0xe0 #2 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #3 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9510 6428K 7257K 78643K 11613 0 pcb 13 8K 8K 78643K 65 0 rtable 109 4K 4K 78643K 377 0 ifaddr 61 12K 12K 78643K 106 0 sysctl 2 0K 0K 78643K 2 0 counters 44 34K 34K 78643K 56 0 ioctlops 0 0K 4K 78643K 1512 0 iov 0 0K 16K 78643K 27 0 mount 1 1K 1K 78643K 1 0 vnodes 1227 77K 78K 78643K 1540 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 10 1K 1K 78643K 17 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 1502 0 proc 62 63K 95K 78643K 549 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 74 0 in_multi 33 2K 2K 78643K 122 0 ether_multi 1 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 2K 78643K 420 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 142 24K 25K 78643K 4255 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 39 0 NDP 10 0K 0K 78643K 29 0 temp 105 3973K 4038K 78643K 5743 0 kqueue 3 4K 9K 78643K 51 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 11 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 120 40 0 38 1 0 1 1 0 8 0 rtentry 112 88 0 44 2 0 2 2 0 8 0 unpcb 120 139 0 129 1 0 1 1 0 8 0 syncache 296 14 0 14 2 1 1 1 0 8 1 tcpqe 32 1178 0 1178 2 2 0 1 0 8 0 tcpcb 736 149 0 137 3 1 2 3 0 8 0 inpcb 304 422 0 410 3 1 2 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 22 0 16 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 4 0 2 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 2 0 1 2 1 1 1 0 482 0 pffrnode 88 2 0 1 2 1 1 1 0 8 0 pffrent 40 6 0 5 2 1 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 2 1 1 0 1 0 8 0 pfstitem 24 42 0 12 1 0 1 1 0 8 0 pfstkey 112 42 0 12 1 0 1 1 0 8 0 pfstate 320 42 0 12 3 0 3 3 0 8 0 pfrule 1360 31 0 26 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 356 0 165 14 2 12 13 0 8 0 art_table 32 357 0 165 2 0 2 2 0 8 0 art_node 16 87 0 47 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 1 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 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 3030 0 1625 89 1 88 89 0 8 0 ffsino 272 3030 0 1625 96 2 94 95 0 8 0 nchpl 144 4839 0 3251 60 0 60 60 0 8 0 uvmvnodes 72 3337 0 0 61 0 61 61 0 8 0 vnodes 224 3337 0 0 197 0 197 197 0 8 0 namei 1024 11593 0 11593 2 1 1 1 0 8 1 percpumem 16 39 0 6 1 0 1 1 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 14693 0 14693 9 8 1 8 0 8 1 plimitpl 152 25 0 17 1 0 1 1 0 8 0 sigapl 424 1713 0 1680 4 0 4 4 0 8 0 futexpl 56 8081 0 8079 1 0 1 1 0 8 0 knotepl 112 126 0 106 1 0 1 1 0 8 0 kqueuepl 168 1090 0 1088 1 0 1 1 0 8 0 pipepl 336 127 0 112 3 1 2 2 0 8 0 fdescpl 496 1696 0 1680 3 0 3 3 0 8 0 filepl 152 5043 0 4932 7 2 5 6 0 8 0 lockfpl 104 99 0 98 1 0 1 1 0 8 0 lockfspl 48 41 0 40 1 0 1 1 0 8 0 sessionpl 144 21 0 10 1 0 1 1 0 8 0 pgrppl 48 27 0 16 1 0 1 1 0 8 0 ucredpl 96 272 0 263 1 0 1 1 0 8 0 zombiepl 144 1680 0 1679 2 1 1 1 0 8 0 processpl 1080 1713 0 1679 3 0 3 3 0 8 0 procpl 672 3589 0 3545 4 0 4 4 0 8 0 sosppl 168 6 0 5 2 1 1 1 0 8 0 sockpl 432 603 0 578 6 2 4 4 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 219 0 0 27 0 27 27 0 8 0 mtagpl 96 50 0 0 2 0 2 2 0 8 0 mbufpl 256 387 0 0 24 0 24 24 0 8 0 bufpl 280 5389 0 168 373 0 373 373 0 8 0 anonpl 24 156415 0 142800 125 11 114 121 0 186 15 amapchunkpl 152 6985 0 6669 15 1 14 15 0 158 0 amappl16 200 5823 0 5144 57 20 37 49 0 8 1 amappl15 192 2 0 0 1 0 1 1 0 8 0 amappl14 184 107 0 105 1 0 1 1 0 8 0 amappl13 176 40 0 38 1 0 1 1 0 8 0 amappl12 168 274 0 266 1 0 1 1 0 8 0 amappl11 160 549 0 535 1 0 1 1 0 8 0 amappl10 152 16 0 8 1 0 1 1 0 8 0 amappl9 144 736 0 736 2 1 1 1 0 8 1 amappl8 136 359 0 316 2 0 2 2 0 8 0 amappl7 128 678 0 668 1 0 1 1 0 8 0 amappl6 120 91 0 75 1 0 1 1 0 8 0 amappl5 112 1889 0 1875 1 0 1 1 0 8 0 amappl4 104 1312 0 1287 1 0 1 1 0 8 0 amappl3 96 198 0 189 1 0 1 1 0 8 0 amappl2 88 11197 0 11127 2 0 2 2 0 8 0 amappl1 80 59298 0 58817 27 16 11 21 0 8 0 amappl 88 3915 0 3833 2 0 2 2 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 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1696 0 1680 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1696 0 1680 1 0 1 1 0 8 0 vmmpekpl 168 12075 0 12044 3 1 2 2 0 8 0 vmmpepl 168 222438 0 220515 138 27 111 111 0 357 22 vmsppl 368 1695 0 1680 2 0 2 2 0 8 0 rwobjpl 56 50021 0 48619 34 13 21 24 0 8 1 pdppl 4096 3399 0 3360 63 22 41 45 0 8 2 pvpl 32 678620 0 661838 200 14 186 193 0 265 28 pmappl 232 1695 0 1680 2 1 1 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 335 0 33 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 witness_checkorder(fffffd806882df80,9,0) at witness_checkorder+0x108b rw_enter(fffffd806882df70,81) at rw_enter+0xd4 rrw_enter(fffffd806882df70,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:461 VOP_LOCK(fffffd8068d0dae0,81) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 vn_lock(fffffd8068d0dae0,81) at vn_lock+0x6c sys/kern/vfs_vnops.c:575 uvn_get(fffffd8070957360,0,ffff8000220ed248,ffff8000220ed22c,0,0) at uvn_get+0x276 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline] uvn_get(fffffd8070957360,0,ffff8000220ed248,ffff8000220ed22c,0,0) at uvn_get+0x276 sys/uvm/uvm_vnode.c:993 uvm_fault_lower(ffff8000220ed3b0,ffff8000220ed3e8,ffff8000220ed2b0,0) at uvm_fault_lower+0x5e7 sys/uvm/uvm_fault.c:1146 uvm_fault(fffffd807effa000,20000000,0,2) at uvm_fault+0x17c sys/uvm/uvm_fault.c:977 kpageflttrap(ffff8000220ed540,20000000) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000220ed540) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff8000220ed770) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000220ed770) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8155e4ffb40, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0x7f7ffffc8fd0, count: -3