uvm_fault(fffffd8071570460,20000000,0,2) at uvm_fault+0x240 sys/uvm/uvm_fault.c:638 kpageflttrap(ffff800022ef9cb0,200000c0) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022ef9cb0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff800022ef9ef0) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022ef9ef0) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x45d0099b00, count: -15 ddb{0}> show registers rdi 0xffff800021a9e000 rsi 0x3811 __ALIGN_SIZE+0x2811 rbp 0xffff800022ef9630 rbx 0x3 rdx 0xffff800021a9e000 rcx 0x3810 __ALIGN_SIZE+0x2810 rax 0xffffffff82229267 db_enter+0x17 r8 0xffffffff81581c0c witness_checkorder+0x10cc r9 0x5 r10 0x7a29f851b07f55a9 r11 0x6b4c23cdbe38c2fd r12 0xfffffd8002dac7c0 r13 0 r14 0 r15 0 rip 0xffffffff82229268 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022ef9620 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=486685 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff800021244548,0xffff8000212442b8 process=0xffff8000ffff8438 user=0xffff800022ef4000, vmspace=0xfffffd8071570460 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29948 261303 6551 0 2 0 syz-executor.0 *29948 486685 6551 0 7 0x4000000 syz-executor.0 29948 383038 6551 0 3 0x4000080 fsleep syz-executor.0 6551 517079 63011 0 3 0x82 nanoslp syz-executor.0 9908 122817 0 0 3 0x14280 nfsidl nfsio 37369 62933 0 0 3 0x14280 nfsidl nfsio 10033 258033 0 0 3 0x14280 nfsidl nfsio 56129 481062 0 0 3 0x14280 nfsidl nfsio 89140 290417 0 0 3 0x14280 nfsidl nfsio 24504 386064 0 0 3 0x14280 nfsidl nfsio 73301 45022 0 0 3 0x14280 nfsidl nfsio 63424 14865 0 0 3 0x14280 nfsidl nfsio 10322 333750 0 0 3 0x14280 nfsidl nfsio 78379 384896 0 0 3 0x14280 nfsidl nfsio 59701 251807 0 0 3 0x14280 nfsidl nfsio 72278 221336 0 0 3 0x14280 nfsidl nfsio 87020 191663 0 0 3 0x14280 nfsidl nfsio 64463 464164 0 0 3 0x14280 nfsidl nfsio 44827 479640 0 0 3 0x14280 nfsidl nfsio 58015 275821 0 0 3 0x14280 nfsidl nfsio 91858 479277 0 0 3 0x14280 nfsidl nfsio 9338 482311 0 0 3 0x14280 nfsidl nfsio 54465 436930 0 0 3 0x14280 nfsidl nfsio 16562 12909 0 0 3 0x14280 nfsidl nfsio 64357 496415 63011 0 3 0x82 nanoslp syz-executor.1 28669 328122 1 0 3 0x100083 ttyin getty 45408 368972 0 0 3 0x14200 bored sosplice 63011 302617 54799 0 3 0x82 thrsleep syz-fuzzer 63011 174332 54799 0 3 0x4000082 thrsleep syz-fuzzer 63011 178413 54799 0 3 0x4000082 thrsleep syz-fuzzer 63011 418553 54799 0 3 0x4000082 thrsleep syz-fuzzer 63011 88862 54799 0 3 0x4000082 thrsleep syz-fuzzer 63011 81257 54799 0 3 0x4000082 thrsleep syz-fuzzer 63011 270672 54799 0 3 0x4000082 thrsleep syz-fuzzer 63011 32718 54799 0 3 0x4000082 kqread syz-fuzzer 54799 275725 25001 0 3 0x10008a sigsusp ksh 25001 422168 38941 0 3 0x9a select sshd 38941 259446 1 0 3 0x88 select sshd 60058 163345 88475 74 3 0x100092 bpf pflogd 88475 160270 1 0 3 0x80 netio pflogd 56210 294738 28612 73 3 0x100090 kqread syslogd 28612 452029 1 0 3 0x100082 netio syslogd 40934 121522 1 0 3 0x100080 kqread resolvd 19905 115562 24801 77 3 0x100092 kqread dhcpleased 61712 483835 24801 77 3 0x100092 kqread dhcpleased 24801 446237 1 0 3 0x80 kqread dhcpleased 49061 452548 0 0 3 0x14200 bored smr 20104 320196 0 0 2 0x14200 zerothread 39889 62050 0 0 3 0x14200 aiodoned aiodoned 99487 196692 0 0 3 0x14200 syncer update 10740 72556 0 0 3 0x14200 cleaner cleaner 38184 153752 0 0 3 0x14200 reaper reaper 55274 129034 0 0 3 0x14200 pgdaemon pagedaemon 92265 94660 0 0 3 0x14200 bored crynlk 33869 373473 0 0 3 0x14200 bored crypto 60384 275276 0 0 3 0x14200 bored viomb 99259 308317 0 0 3 0x40014200 acpi0 acpi0 30789 128838 0 0 7 0x40014200 idle1 61010 341912 0 0 3 0x14200 bored softnet 4460 160728 0 0 3 0x14200 bored systqmp 94991 11178 0 0 3 0x14200 bored systq 92425 95817 0 0 3 0x40014200 bored softclock 67536 78747 0 0 3 0x40014200 idle0 1 336944 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 29948 (syz-executor.0) thread 0xffff800021244008 (486685) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8299c178) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvm_fault+0x224 sys/uvm/uvm_fault.c:637 #2 kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 #3 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #4 alltraps_kern_meltdown+0x7b #5 copyout+0x53 #6 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #7 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xfffffd806f5dfdf0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 dopipe+0xd6 #2 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #3 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 6450K 7585K 78643K 17564 0 pcb 13 8K 8K 78643K 439 0 rtable 113 4K 4K 78643K 747 0 ifaddr 81 15K 15K 78643K 244 0 counters 44 34K 34K 78643K 92 0 ioctlops 0 0K 4K 78643K 1690 0 iov 0 0K 24K 78643K 248 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 6 0 vnodes 1225 77K 77K 78643K 3415 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 44 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 928 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 8068 0 sigio 0 0K 0K 78643K 55 0 proc 70 87K 111K 78643K 756 0 subproc 32 2K 2K 78643K 136 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 587 0 in_multi 33 2K 2K 78643K 429 0 ether_multi 1 0K 0K 78643K 83 0 mrt 0 0K 0K 78643K 59 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 2K 78643K 770 0 pfkey data 0 0K 1K 78643K 17 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 297 116K 117K 78643K 97143 0 UVM aobj 39 7K 7K 78643K 49 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 294 0 NDP 15 0K 0K 78643K 85 0 temp 143 4210K 4334K 78643K 44175 0 kqueue 10 14K 24K 78643K 261 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 plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 183 0 180 1 0 1 1 0 8 0 rtentry 112 229 0 184 2 0 2 2 0 8 0 unpcb 120 1713 0 1696 1 0 1 1 0 8 0 syncache 296 40 0 40 8 8 0 1 0 8 0 tcpqe 32 133 0 133 9 9 0 1 0 8 0 tcpcb 736 953 0 949 23 22 1 4 0 8 0 arp 120 20 0 14 1 0 1 1 0 8 0 inpcb 304 2614 0 2607 18 17 1 2 0 8 0 rttmr 72 18 0 18 3 3 0 1 0 8 0 nd6 48 57 0 50 1 0 1 1 0 8 0 pkpcb 40 32 0 32 6 6 0 1 0 8 0 kcovpl 48 8 0 6 1 0 1 1 0 8 0 ppxss 1248 5 0 5 3 3 0 1 0 8 0 pffrag 232 4 0 4 2 2 0 1 0 482 0 pffrnode 88 4 0 4 2 2 0 1 0 8 0 pffrent 40 11 0 11 4 4 0 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 264 8 0 8 1 1 0 1 0 8 0 pfstitem 24 160 0 151 1 0 1 1 0 8 0 pfstkey 112 160 0 151 2 1 1 2 0 8 0 pfstate 320 160 0 151 9 8 1 6 0 8 0 pfrule 1360 47 0 42 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1017 0 795 20 6 14 14 0 8 0 art_table 32 1018 0 795 2 0 2 2 0 8 0 art_node 16 228 0 187 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 9 1 0 1 1 0 8 0 semapl 112 926 0 916 1 0 1 1 0 8 0 shmpl 112 46 0 10 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 11273 0 9855 91 1 90 90 0 8 0 ffsino 272 11273 0 9855 96 1 95 96 0 8 0 nchpl 144 20632 0 19023 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 50771 0 50771 2 1 1 1 0 8 1 percpumem 16 58 0 24 1 0 1 1 0 8 0 vcpupl 1984 10 0 0 2 0 2 2 0 8 0 vmpool 560 18 0 8 2 1 1 1 0 8 0 scsiplug 72 7 0 7 1 1 0 1 0 8 0 scxspl 216 61917 0 61917 10 9 1 8 0 8 1 plimitpl 152 173 0 164 1 0 1 1 0 8 0 sigapl 424 8342 0 8287 10 3 7 7 0 8 0 futexpl 56 59964 0 59963 2 1 1 1 0 8 0 knotepl 112 56 0 0 2 0 2 2 0 8 0 kqueuepl 216 4467 0 4460 3 2 1 2 0 8 0 pipepl 336 750 0 738 23 21 2 3 0 8 0 fdescpl 496 8285 0 8267 3 0 3 3 0 8 0 filepl 152 26741 0 26622 10 4 6 7 0 8 1 lockfpl 104 978 0 975 1 0 1 1 0 8 0 lockfspl 48 381 0 378 1 0 1 1 0 8 0 sessionpl 144 25 0 14 1 0 1 1 0 8 0 pgrppl 48 35 0 24 1 0 1 1 0 8 0 ucredpl 96 3166 0 3154 1 0 1 1 0 8 0 zombiepl 144 8287 0 8286 1 0 1 1 0 8 0 processpl 1072 8342 0 8286 4 0 4 4 0 8 0 procpl 672 17448 0 17383 8 2 6 6 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 92 0 92 10 10 0 1 0 8 0 sockpl 480 4567 0 4540 15 10 5 6 0 8 0 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 23 0 0 3 1 2 3 0 8 0 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 507 0 0 18 0 18 18 0 8 0 mtagpl 96 324 0 0 7 0 7 7 0 8 0 mbufpl 256 1348 0 0 62 0 62 62 0 8 0 bufpl 280 14595 0 8259 453 0 453 453 0 8 0 anonpl 24 2112985 0 2099581 153 70 83 99 0 186 0 amapchunkpl 152 231840 0 231368 47 27 20 32 0 158 0 amappl16 200 16940 0 16458 70 44 26 36 0 8 0 amappl15 192 2 0 2 2 2 0 1 0 8 0 amappl14 184 414 0 412 1 0 1 1 0 8 0 amappl13 176 1081 0 1078 1 0 1 1 0 8 0 amappl12 168 4215 0 4213 1 0 1 1 0 8 0 amappl11 160 973 0 957 1 0 1 1 0 8 0 amappl10 152 1484 0 1475 1 0 1 1 0 8 0 amappl9 144 52 0 49 1 0 1 1 0 8 0 amappl8 136 593 0 494 4 0 4 4 0 8 0 amappl7 128 96 0 82 1 0 1 1 0 8 0 amappl6 120 173 0 156 1 0 1 1 0 8 0 amappl5 112 9212 0 9192 1 0 1 1 0 8 0 amappl4 104 2191 0 2155 4 3 1 2 0 8 0 amappl3 96 4829 0 4825 1 0 1 1 0 8 0 amappl2 88 1678 0 1609 2 0 2 2 0 8 0 amappl1 80 138230 0 137781 14 4 10 13 0 8 0 amappl 88 96214 0 96046 5 0 5 5 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 48 0 10 1 0 1 1 0 8 0 uaddrrnd 24 8303 0 8275 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 8303 0 8275 1 0 1 1 0 8 0 vmmpekpl 168 45692 0 45656 3 0 3 3 0 8 0 vmmpepl 168 917687 0 915749 186 96 90 105 0 357 1 vmsppl 368 8302 0 8275 3 0 3 3 0 8 0 rwobjpl 56 156336 0 155017 34 15 19 22 0 8 0 pdppl 4096 16614 0 16560 82 26 56 57 0 8 2 pvpl 32 4569345 0 4553333 344 205 139 161 0 265 7 pmappl 224 8302 0 8275 2 0 2 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 439 0 82 11 0 11 11 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:399 witness_checkorder(fffffd806b0476f8,9,0) at witness_checkorder+0x10f3 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd806b0476f8,9,0) at witness_checkorder+0x10f3 sys/kern/subr_witness.c:1105 rw_enter(fffffd806b0476e8,81) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250 rrw_enter(fffffd806b0476e8,81) at rrw_enter+0x8b sys/kern/kern_rwlock.c:461 VOP_LOCK(fffffd80704d7540,81) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:614 vn_lock(fffffd80704d7540,81) at vn_lock+0x84 sys/kern/vfs_vnops.c:579 uvn_get(fffffd8071528a30,8000000000000000,ffff800022ef99b8,ffff800022ef9988,0,0) at uvn_get+0x256 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline] uvn_get(fffffd8071528a30,8000000000000000,ffff800022ef99b8,ffff800022ef9988,0,0) at uvn_get+0x256 sys/uvm/uvm_vnode.c:993 uvm_fault_lower(ffff800022ef9b20,ffff800022ef9b58,ffff800022ef9aa0,0) at uvm_fault_lower+0x302 sys/uvm/uvm_fault.c:1251 uvm_fault(fffffd8071570460,20000000,0,2) at uvm_fault+0x240 sys/uvm/uvm_fault.c:638 kpageflttrap(ffff800022ef9cb0,200000c0) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022ef9cb0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff800022ef9ef0) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022ef9ef0) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x45d0099b00, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:353 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5