uvm_fault(fffffd806ee78e68,20000000,0,2) at uvm_fault+0x240 sys/uvm/uvm_fault.c:638 kpageflttrap(ffff8000242b3340,20000080) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff8000242b3340) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff8000242b3570) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000242b3570) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbcd2eb07a00, count: -15 ddb{0}> show registers rdi 0xffff80002349c000 rsi 0x3969 __ALIGN_SIZE+0x2969 rbp 0xffff8000242b2cc0 rbx 0x3 rdx 0xffff80002349c000 rcx 0x3968 __ALIGN_SIZE+0x2968 rax 0xffffffff8150d207 db_enter+0x17 r8 0xffffffff81c323dc witness_checkorder+0x10cc r9 0x5 r10 0xdfea5deb9b99da47 r11 0x164442da07d6c6f9 r12 0xfffffd8002da87c0 r13 0 r14 0 r15 0 rip 0xffffffff8150d208 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000242b2cb0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=313654 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800021272540,0xffffffff828e52d0 process=0xffff8000ffffa5b8 user=0xffff8000242ae000, vmspace=0xfffffd806ee78e68 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51073 408758 71589 0 2 0 syz-executor.1 *51073 313654 71589 0 7 0x4000000 syz-executor.1 51870 270575 0 0 3 0x14200 bored sosplice 71589 73654 1255 0 3 0x82 nanoslp syz-executor.1 75293 481970 1255 0 3 0x2 biowait syz-executor.0 1255 505622 1883 0 3 0x82 thrsleep syz-fuzzer 1255 169106 1883 0 3 0x4000082 nanoslp syz-fuzzer 1255 303854 1883 0 3 0x4000082 thrsleep syz-fuzzer 1255 492637 1883 0 3 0x4000082 thrsleep syz-fuzzer 1255 149542 1883 0 3 0x4000082 thrsleep syz-fuzzer 1255 477002 1883 0 3 0x4000082 kqread syz-fuzzer 1255 446993 1883 0 3 0x4000082 thrsleep syz-fuzzer 1255 497865 1883 0 3 0x4000082 nanoslp syz-fuzzer 1883 360730 17356 0 3 0x10008a sigsusp ksh 17356 173433 69534 0 3 0x9a select sshd 94725 347449 1 0 3 0x100083 ttyin getty 69534 248507 1 0 3 0x88 select sshd 33626 377757 3986 74 3 0x100092 bpf pflogd 3986 158376 1 0 3 0x80 netio pflogd 99957 11453 32636 73 3 0x100090 kqread syslogd 32636 495452 1 0 3 0x100082 netio syslogd 31399 175198 1 0 3 0x100080 kqread resolvd 17375 71594 58608 77 3 0x100092 kqread dhcpleased 7444 226281 58608 77 3 0x100092 kqread dhcpleased 58608 284362 1 0 3 0x80 kqread dhcpleased 33880 468288 0 0 3 0x14200 bored smr 24943 114459 0 0 2 0x14200 zerothread 67501 154135 0 0 3 0x14200 aiodoned aiodoned 84420 253888 0 0 3 0x14200 syncer update 34939 411108 0 0 3 0x14200 cleaner cleaner 18923 419300 0 0 3 0x14200 reaper reaper 29371 138234 0 0 3 0x14200 pgdaemon pagedaemon 54922 365275 0 0 3 0x14200 bored crynlk 5537 5154 0 0 3 0x14200 bored crypto 46442 388737 0 0 3 0x14200 bored viomb 94962 60168 0 0 3 0x40014200 acpi0 acpi0 29912 26595 0 0 7 0x40014200 idle1 98587 349276 0 0 3 0x14200 bored softnet 85785 183723 0 0 3 0x14200 bored systqmp 60776 99782 0 0 3 0x14200 bored systq 24704 131097 0 0 3 0x40014200 bored softclock 57988 503732 0 0 3 0x40014200 idle0 1 37480 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 51073 (syz-executor.1) thread 0xffff8000212737a0 (313654) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829dbb18) #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 (0xfffffd806f0d0a10) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 sys_socketpair+0x20f #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 Process 75293 (syz-executor.0) thread 0xffff800021273500 (481970) exclusive rrwlock inode r = 0 (0xfffffd8068e6d920) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1350 #5 ffs_inode_alloc+0x1c3 sys/ufs/ffs/ffs_alloc.c:394 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:457 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3070 #9 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b050d58) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:614 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xdd sys/kern/vfs_lookup.c:413 #6 namei+0x55a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3055 #8 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10142 6491K 6944K 78643K 12899 0 pcb 13 8K 8K 78643K 120 0 rtable 104 3K 3K 78643K 313 0 ifaddr 53 12K 12K 78643K 134 0 counters 44 34K 34K 78643K 68 0 ioctlops 0 0K 4K 78643K 1516 0 iov 0 0K 16K 78643K 29 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 6 0 vnodes 1218 77K 77K 78643K 1819 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 13 0 VM map 2 1K 1K 78643K 2 0 sem 11 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 2289 0 sigio 0 0K 0K 78643K 39 0 proc 71 87K 111K 78643K 378 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 102 0 in_multi 33 2K 2K 78643K 206 0 ether_multi 1 0K 0K 78643K 36 0 mrt 0 0K 0K 78643K 40 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 446 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 186 26K 34K 78643K 28730 0 UVM aobj 5 2K 2K 78643K 5 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 91 0 NDP 8 0K 0K 78643K 26 0 temp 114 4206K 4270K 78643K 7839 0 kqueue 10 14K 22K 78643K 171 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 42 0 39 1 0 1 1 0 8 0 rtentry 112 92 0 48 2 0 2 2 0 8 0 unpcb 120 485 0 468 1 0 1 1 0 8 0 syncache 296 15 0 15 2 2 0 1 0 8 0 tcpqe 32 25 0 25 2 2 0 1 0 8 0 tcpcb 736 365 0 361 9 6 3 3 0 8 2 arp 120 8 0 2 1 0 1 1 0 8 0 inpcb 304 854 0 847 3 2 1 2 0 8 0 rttmr 72 10 0 10 1 1 0 1 0 8 0 nd6 48 35 0 29 1 0 1 1 0 8 0 kcovpl 48 3 0 1 1 0 1 1 0 8 0 ppxss 1248 11 0 11 2 1 1 1 0 8 1 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 5 0 5 1 1 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 pfstitem 24 71 0 46 1 0 1 1 0 8 0 pfstkey 112 71 0 46 2 0 2 2 0 8 0 pfstate 320 71 0 46 6 2 4 5 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 256 236 0 48 12 0 12 12 0 8 0 art_table 32 237 0 48 2 0 2 2 0 8 0 art_node 16 91 0 51 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 27 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4262 0 2854 89 0 89 89 0 8 0 ffsino 272 4262 0 2854 95 0 95 95 0 8 0 nchpl 144 7016 0 5402 61 0 61 61 0 8 0 uvmvnodes 72 4725 0 0 86 0 86 86 0 8 0 vnodes 224 4725 0 0 278 0 278 278 0 8 0 namei 1024 17670 0 17669 1 0 1 1 0 8 0 percpumem 16 46 0 12 1 0 1 1 0 8 0 scxspl 216 20281 0 20280 9 8 1 8 0 8 0 plimitpl 152 64 0 55 1 0 1 1 0 8 0 sigapl 424 2538 0 2503 6 1 5 5 0 8 1 futexpl 56 16625 0 16625 1 0 1 1 0 8 1 knotepl 112 63 0 0 2 0 2 2 0 8 0 kqueuepl 216 924 0 914 1 0 1 1 0 8 0 pipepl 336 155 0 145 6 4 2 2 0 8 1 fdescpl 496 2521 0 2503 3 0 3 3 0 8 0 filepl 152 7819 0 7704 5 0 5 5 0 8 0 lockfpl 104 210 0 208 1 0 1 1 0 8 0 lockfspl 48 76 0 74 1 0 1 1 0 8 0 sessionpl 144 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 1055 0 1043 1 0 1 1 0 8 0 zombiepl 144 2503 0 2503 1 0 1 1 0 8 1 processpl 1072 2538 0 2503 3 0 3 3 0 8 0 procpl 672 5073 0 5030 7 3 4 5 0 8 0 sosppl 168 11 0 11 1 1 0 1 0 8 0 sockpl 480 1382 0 1355 4 0 4 4 0 8 0 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 195 0 0 17 0 17 17 0 8 0 mtagpl 96 119 0 0 3 0 3 3 0 8 0 mbufpl 256 652 0 0 37 1 36 36 0 8 0 bufpl 280 5921 0 134 414 0 414 414 0 8 0 anonpl 24 621976 0 615087 62 18 44 54 0 186 1 amapchunkpl 152 67929 0 67537 26 9 17 22 0 158 1 amappl16 200 4506 0 4339 12 3 9 11 0 8 0 amappl15 192 1 0 0 1 0 1 1 0 8 0 amappl14 184 4 0 2 1 0 1 1 0 8 0 amappl13 176 1242 0 1239 1 0 1 1 0 8 0 amappl12 168 1 0 1 1 1 0 1 0 8 0 amappl11 160 44 0 29 1 0 1 1 0 8 0 amappl10 152 50 0 43 1 0 1 1 0 8 0 amappl9 144 16 0 14 1 0 1 1 0 8 0 amappl8 136 1503 0 1462 3 1 2 2 0 8 0 amappl7 128 1178 0 1159 1 0 1 1 0 8 0 amappl6 120 131 0 121 1 0 1 1 0 8 0 amappl5 112 1721 0 1703 1 0 1 1 0 8 0 amappl4 104 667 0 643 1 0 1 1 0 8 0 amappl3 96 1295 0 1290 1 0 1 1 0 8 0 amappl2 88 1658 0 1606 2 0 2 2 0 8 0 amappl1 80 44104 0 43660 13 3 10 13 0 8 0 amappl 88 28241 0 28112 4 0 4 4 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2521 0 2503 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2521 0 2503 1 0 1 1 0 8 0 vmmpekpl 168 17484 0 17461 2 0 2 2 0 8 0 vmmpepl 168 277636 0 276172 73 4 69 70 0 357 2 vmsppl 368 2520 0 2503 2 0 2 2 0 8 0 rwobjpl 56 48893 0 47993 16 3 13 14 0 8 0 pdppl 4096 5050 0 5006 62 16 46 50 0 8 2 pvpl 32 1361128 0 1350736 167 78 89 136 0 265 3 pmappl 224 2520 0 2503 2 0 2 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 345 0 30 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:399 witness_checkorder(fffffd8068e6db40,9,0) at witness_checkorder+0x10f3 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd8068e6db40,9,0) at witness_checkorder+0x10f3 sys/kern/subr_witness.c:1105 rw_enter(fffffd8068e6db30,81) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250 rrw_enter(fffffd8068e6db30,81) at rrw_enter+0x8b sys/kern/kern_rwlock.c:461 VOP_LOCK(fffffd8066144a88,81) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:614 vn_lock(fffffd8066144a88,81) at vn_lock+0x84 sys/kern/vfs_vnops.c:579 uvn_get(fffffd807304ba70,0,ffff8000242b3048,ffff8000242b3018,0,0) at uvn_get+0x256 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline] uvn_get(fffffd807304ba70,0,ffff8000242b3048,ffff8000242b3018,0,0) at uvn_get+0x256 sys/uvm/uvm_vnode.c:993 uvm_fault_lower(ffff8000242b31b0,ffff8000242b31e8,ffff8000242b3130,0) at uvm_fault_lower+0x302 sys/uvm/uvm_fault.c:1251 uvm_fault(fffffd806ee78e68,20000000,0,2) at uvm_fault+0x240 sys/uvm/uvm_fault.c:638 kpageflttrap(ffff8000242b3340,20000080) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff8000242b3340) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff8000242b3570) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000242b3570) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbcd2eb07a00, 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