*cpu1: uvm_fault(0xffffffff835ba730, 0xffff80001e692004, 0, 1) -> d ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x8b15be82780, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800031db8ce0 rbx 0 rdx 0 rcx 0xffff8000371c76f8 rax 0x2a r8 0xffff800031db8c10 r9 0 r10 0x4a71e45f4e0ae7f8 r11 0xfd255deb933e7af7 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff817b74c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800031db8c60 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=366132 pid=53271 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371c67c8,0xffffffff83593b30 process=0xffff8000fffec910 user=0xffff800031db3000, vmspace=0xfffffd806eb9f1c0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85435 471099 20340 0 2 0 syz-executor 53271 539 495 0 3 0x80 nanoslp syz-executor 53271 523451 495 0 3 0x4000080 fsleep syz-executor 53271 488400 495 0 2 0x4000000 syz-executor *53271 366132 495 0 7 0x4000000 syz-executor 32818 381033 25557 0 2 0 syz-executor 32818 406029 25557 0 3 0x4000080 fsleep syz-executor 63843 173001 28112 0 2 0 syz-executor 63843 465974 28112 0 2 0x4000000 syz-executor 93137 59045 89151 0 3 0x80 nanoslp syz-executor 93137 145049 89151 0 3 0x4000080 ttyin syz-executor 93137 361925 89151 0 3 0x4000080 fsleep syz-executor 93137 190082 89151 0 3 0x4000080 fsleep syz-executor 86024 385944 92930 0 3 0x80 nanoslp syz-executor 86024 147598 92930 0 3 0x4000080 kqsel syz-executor 86024 274050 92930 0 3 0x4000080 fsleep syz-executor 70963 274878 33765 0 3 0x82 nanoslp syz-executor 25557 423145 33765 0 3 0x82 nanoslp syz-executor 89151 5538 33765 0 3 0x82 nanoslp syz-executor 92930 16325 33765 0 3 0x82 nanoslp syz-executor 28112 33946 33765 0 3 0x82 nanoslp syz-executor 495 259898 33765 0 3 0x82 nanoslp syz-executor 20340 39667 33765 0 3 0x82 nanoslp syz-executor 22597 465451 33765 0 7 0x2 syz-executor 66120 39674 1 0 3 0x100083 ttyin getty 36999 228153 0 0 3 0x14280 nfsidl nfsio 5652 237671 0 0 3 0x14280 nfsidl nfsio 18215 142119 0 0 3 0x14280 nfsidl nfsio 13856 124287 0 0 3 0x14280 nfsidl nfsio 89227 135201 0 0 3 0x14280 nfsidl nfsio 44439 441722 0 0 3 0x14280 nfsidl nfsio 20990 81385 0 0 3 0x14280 nfsidl nfsio 1687 463110 0 0 3 0x14280 nfsidl nfsio 65999 480176 0 0 3 0x14280 nfsidl nfsio 88395 9206 0 0 3 0x14280 nfsidl nfsio 20177 468333 0 0 3 0x14280 nfsidl nfsio 2931 136341 0 0 3 0x14280 nfsidl nfsio 31308 160693 0 0 3 0x14280 nfsidl nfsio 91682 347959 0 0 3 0x14280 nfsidl nfsio 79238 369093 0 0 3 0x14280 nfsidl nfsio 6181 81808 0 0 3 0x14280 nfsidl nfsio 87779 225412 0 0 3 0x14280 nfsidl nfsio 43900 377113 0 0 3 0x14280 nfsidl nfsio 608 155864 0 0 3 0x14280 nfsidl nfsio 95410 28810 0 0 3 0x14280 nfsidl nfsio 17673 212614 0 0 3 0x14200 bored sosplice 33765 481466 9046 0 3 0x82 kqread syz-executor 9046 20089 32531 0 3 0x10008a sigsusp ksh 32531 450132 556 0 3 0x98 kqread sshd-session 556 366138 92157 0 3 0x92 kqread sshd-session 92157 302165 1 0 3 0x88 kqread sshd 52998 422274 10955 74 3 0x1100092 bpf pflogd 10955 344071 1 0 3 0x80 sbwait pflogd 46546 489297 42237 73 2 0x1100010 syslogd 42237 402488 1 0 3 0x100082 sbwait syslogd 72895 188131 1 0 3 0x100080 kqread resolvd 93371 486977 69819 77 3 0x100092 kqread dhcpleased 46216 461445 69819 77 3 0x100092 kqread dhcpleased 69819 287100 1 0 3 0x80 kqread dhcpleased 36735 144355 0 0 3 0x14200 bored smr 40157 440483 0 0 2 0x14200 zerothread 56790 481 0 0 3 0x14200 aiodoned aiodoned 62499 397711 0 0 3 0x14200 syncer update 37040 484369 0 0 3 0x14200 cleaner cleaner 50774 503467 0 0 3 0x14200 reaper reaper 63733 447124 0 0 3 0x14200 pgdaemon pagedaemon 43036 159041 0 0 3 0x14200 bored viomb 60859 253545 0 0 3 0x40014200 acpi0 acpi0 27031 364486 0 0 3 0x40014200 idle1 57888 212097 0 0 3 0x14200 bored softnet3 70317 125776 0 0 3 0x14200 bored softnet2 27016 266219 0 0 3 0x14200 bored softnet1 87241 264039 0 0 3 0x14200 bored softnet0 28911 78166 0 0 3 0x14200 bored systqmp 67679 111350 0 0 3 0x14200 bored systq 61050 131435 0 0 3 0x14200 tmoslp softclockmp 61287 73712 0 0 3 0x40014200 tmoslp softclock 3912 432228 0 0 3 0x40014200 idle0 1 415235 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff836026b8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_fault_lower+0xab4 sys/uvm/uvm_fault.c:1543 #4 uvm_fault+0x301 sys/uvm/uvm_fault.c:637 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 Process 53271 (syz-executor) thread 0xffff8000371c76f8 (366132) Process 22597 (syz-executor) thread 0xffff80002a03e2a8 (465451) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10230 11145K 11530K 166960K 15052 0 pcb 18 18K 20K 166960K 1055 0 rtable 228 8K 8K 166960K 5475 0 pf 34 17K 25K 166960K 495 0 ifaddr 42 9K 10K 166960K 754 0 ifgroup 55 2K 2K 166960K 852 0 sysctl 3 0K 4K 166960K 18 0 counters 64 36K 37K 166960K 480 0 ioctlops 0 0K 4K 166960K 2111 0 iov 0 0K 28K 166960K 500 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1468 92K 93K 166960K 6078 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 10K 18K 166960K 62 0 VM map 2 1K 1K 166960K 2 0 sem 27 17K 17K 166960K 175 0 dirhash 15 2K 3K 166960K 72 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 93K 166960K 5933 0 sigio 0 0K 0K 166960K 200 0 proc 75 91K 140K 166960K 5472 0 subproc 104 6K 7K 166960K 2145 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 887 0 in_multi 96 7K 7K 166960K 2019 0 ether_multi 1 0K 0K 166960K 43 0 mrt 2 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 3422 0 pfkey data 0 0K 0K 166960K 6 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 236 72K 109K 166960K 46825 0 UVM aobj 85 9K 9K 166960K 100 0 pinsyscall 42 84K 105K 166960K 11166 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 229 0 NDP 12 0K 2K 166960K 562 0 temp 77 6824K 6904K 166960K 287552 0 kqueue 14 22K 30K 166960K 654 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 714 0 711 5 4 1 3 0 8 0 rtentry 112 1974 0 1871 6 3 3 4 0 8 0 unpcb 144 3726 0 3708 26 23 3 6 0 8 2 syncache 336 15 0 15 8 8 0 1 0 8 0 tcpqe 32 5 0 5 3 3 0 1 0 8 0 tcpcb 808 1818 0 1814 55 53 2 9 0 8 1 arp 120 365 0 344 1 0 1 1 0 8 0 ipq 40 9 0 8 3 2 1 1 0 8 0 ipqe 40 66 0 65 3 2 1 1 0 8 0 inpcb 336 6583 0 6570 95 90 5 19 0 8 0 nd6 136 527 0 502 2 1 1 2 0 8 0 pkpcb 40 16 0 16 10 9 1 1 0 8 1 kcovpl 48 165 0 157 1 0 1 1 0 8 0 ppxss 1168 27 0 27 10 10 0 1 0 8 0 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 3 0 3 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 25 0 23 1 0 1 1 0 8 0 pfstkey 128 25 0 23 1 0 1 1 0 8 0 pfstate 376 25 0 23 3 2 1 3 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 7953 0 7526 47 20 27 32 0 8 0 art_table 32 7956 0 7526 5 1 4 5 0 8 0 art_node 16 1970 0 1879 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 163 0 138 1 0 1 1 0 8 0 shmpl 112 97 0 15 3 0 3 3 0 8 0 dirhash 1024 58 0 38 3 0 3 3 0 8 0 dino2pl 256 8682 0 6844 118 2 116 116 0 8 0 ffsino 272 8682 0 6844 124 1 123 123 0 8 0 nchpl 144 14169 0 13349 69 38 31 67 0 8 0 uvmvnodes 80 9829 0 0 201 0 201 201 0 8 0 vnodes 216 9829 0 0 547 0 547 547 0 8 0 namei 1024 70207 0 70206 20 19 1 2 0 8 0 percpumem 16 254 0 208 1 0 1 1 0 8 0 kstatmem 264 440 0 416 4 2 2 3 0 8 0 scsiplug 72 12 0 12 8 7 1 1 0 8 1 scxspl 216 128055 0 128055 17 15 2 8 1 8 2 plimitpl 152 1567 0 1549 1 0 1 1 0 8 0 sigapl 424 5986 0 5916 9 0 9 9 0 8 0 futexpl 64 56020 0 56015 18 17 1 1 0 8 0 knotepl 120 1009 0 0 23 1 22 22 0 8 0 kqueuepl 216 1402 0 1392 17 16 1 5 0 8 0 pipepl 320 1436 0 1409 26 23 3 8 0 8 0 fdescpl 496 5917 0 5886 11 6 5 5 0 8 0 filepl 152 39556 0 39302 89 76 13 25 0 8 2 lockfpl 104 1596 0 1594 2 1 1 2 0 8 0 lockfspl 48 531 0 529 1 0 1 1 0 8 0 sessionpl 144 197 0 188 1 0 1 1 0 8 0 pgrppl 48 408 0 391 1 0 1 1 0 8 0 ucredpl 104 6441 0 6426 1 0 1 1 0 8 0 zombiepl 144 5917 0 5916 2 1 1 1 0 8 0 processpl 1160 5986 0 5916 6 0 6 6 0 8 0 procpl 648 11294 0 11214 11 3 8 8 0 8 0 srpgc 96 21 0 21 7 7 0 1 0 8 0 sosppl 168 23 0 23 11 11 0 1 0 8 0 sockpl 664 11098 0 11064 106 99 7 21 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 155 0 0 18 0 18 18 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 68 0 0 5 0 5 5 0 8 0 mtagpl 96 16 0 0 1 0 1 1 0 8 0 mbufpl 256 528 0 0 32 0 32 32 0 8 0 bufpl 280 23599 0 16537 705 132 573 705 0 8 7 anonpl 24 803976 0 800279 192 139 53 80 0 185 7 amapchunkpl 152 152063 0 151568 95 63 32 42 0 158 10 amappl16 200 14532 0 14512 128 126 2 24 0 8 0 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 461 0 449 1 0 1 1 0 8 0 amappl13 176 17 0 17 6 6 0 1 0 8 0 amappl12 168 9079 0 9049 3 1 2 2 0 8 0 amappl11 160 78 0 64 1 0 1 1 0 8 0 amappl10 152 76 0 75 1 0 1 1 0 8 0 amappl9 144 161 0 161 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 438 0 426 1 0 1 1 0 8 0 amappl6 120 1738 0 1735 1 0 1 1 0 8 0 amappl5 112 782 0 770 1 0 1 1 0 8 0 amappl4 104 843 0 825 1 0 1 1 0 8 0 amappl3 96 30093 0 29980 6 2 4 4 0 8 0 amappl2 88 3021 0 2951 2 0 2 2 0 8 0 amappl1 80 37146 0 36581 20 7 13 14 0 8 0 amappl 88 45000 0 44826 5 0 5 5 0 92 0 dma16384 16384 4 0 4 4 4 0 1 0 8 0 dma4096 4096 6 0 6 4 4 0 1 0 8 0 dma2048 2048 2 0 2 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 7 0 7 2 2 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 99 0 15 2 0 2 2 0 8 0 uaddrrnd 24 5917 0 5886 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5917 0 5886 1 0 1 1 0 8 0 vmmpekpl 168 48946 0 48903 3 0 3 3 0 8 0 vmmpepl 168 361761 0 359909 165 78 87 104 0 357 3 vmsppl 440 5916 0 5886 6 2 4 5 0 8 0 rwobjpl 56 105097 0 94252 162 6 156 160 0 8 0 pdppl 4096 11841 0 11772 303 232 71 85 0 8 2 pvpl 32 45159 0 0 364 0 364 364 0 265 0 pmappl 248 5916 0 5886 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 858 0 448 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x8b15be82780, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,31) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(31) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8309428e) at db_printf+0x9b fault(ffffffff8303f6d6) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a150230,ffff80001e692004) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a150230) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80002a1503f0, count: 0 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,31) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(31) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8309428e) at db_printf+0x9b fault(ffffffff8303f6d6) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a150230,ffff80001e692004) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a150230) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8077e57028,ffff80002a1505d8,ffff80002a150608) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a1505a8) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80002a1505a8) at namei+0x7aa sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a03e2a8,ffffff9c,7a88718e5d30,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 syscall(ffff80002a150780) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a150780) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a88718e5d20, count: -21