*cpu0: uvm_fault(0xfffffd806cde85d0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffc3f50, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002e3bf4d0 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff80002e3bf400 r9 0 r10 0xbd7806eeb387d6d7 r11 0xb3c9a3df8520857e r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8183850c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff80002e3bf450 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{1}> show proc PROC (syz-executor.0) pid=215199 stat=onproc flags process=10 proc=0 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800021217500,0xffff800021217cf0 process=0xffff80002122c440 user=0xffff80002e3ba000, vmspace=0xfffffd806cde8e70 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8904 314189 9868 32767 2 0x10 syz-executor.7 *57533 215199 85024 32767 7 0x10 syz-executor.0 30966 245023 31385 32767 2 0x10 syz-executor.4 67535 264283 90677 32767 2 0x10 syz-executor.6 67535 27996 90677 32767 3 0x4000090 fsleep syz-executor.6 23146 421739 54681 32767 2 0x10 syz-executor.2 42436 399238 20505 32767 2 0x10 syz-executor.1 42436 511654 20505 32767 7 0x4000010 syz-executor.1 42436 247192 20505 32767 3 0x4000090 fsleep syz-executor.1 88659 432414 74811 32767 2 0x10 syz-executor.5 88659 391513 74811 32767 3 0x4000090 netio syz-executor.5 88659 271211 74811 32767 3 0x4000090 netio syz-executor.5 88659 95170 74811 32767 3 0x4000090 fsleep syz-executor.5 9868 102029 91912 32767 3 0x90 nanoslp syz-executor.7 91912 194949 84972 0 3 0x82 wait syz-executor.7 31385 368507 12453 32767 3 0x90 nanoslp syz-executor.4 12453 232227 84972 0 3 0x82 wait syz-executor.4 85024 234762 76861 32767 3 0x90 nanoslp syz-executor.0 76861 91033 84972 0 3 0x82 wait syz-executor.0 52945 164562 72229 32767 3 0x90 piperd syz-executor.3 72229 1916 84972 0 3 0x82 wait syz-executor.3 54681 55814 83153 32767 3 0x90 nanoslp syz-executor.2 83153 39889 84972 0 3 0x82 wait syz-executor.2 90677 284546 26308 32767 3 0x90 nanoslp syz-executor.6 26308 63583 84972 0 3 0x82 wait syz-executor.6 20505 366378 78257 32767 3 0x90 nanoslp syz-executor.1 78257 240426 84972 0 3 0x82 wait syz-executor.1 74811 468736 53679 32767 3 0x90 nanoslp syz-executor.5 53679 220964 84972 0 3 0x82 wait syz-executor.5 13294 27558 0 0 3 0x14200 bored sosplice 84972 19167 18725 0 3 0x82 thrsleep syz-fuzzer 84972 82848 18725 0 3 0x4000082 thrsleep syz-fuzzer 84972 135723 18725 0 3 0x4000082 thrsleep syz-fuzzer 84972 376944 18725 0 3 0x4000082 thrsleep syz-fuzzer 84972 103422 18725 0 3 0x4000082 kqread syz-fuzzer 84972 437210 18725 0 3 0x4000082 thrsleep syz-fuzzer 84972 339312 18725 0 3 0x4000082 thrsleep syz-fuzzer 84972 169044 18725 0 3 0x4000082 thrsleep syz-fuzzer 84972 337890 18725 0 3 0x4000082 thrsleep syz-fuzzer 18725 348146 30516 0 3 0x10008a sigsusp ksh 30516 321069 3861 0 3 0x9a kqread sshd 43980 441797 1 0 3 0x100083 ttyin getty 3861 47317 1 0 3 0x88 kqread sshd 68645 458254 28739 73 3 0x1100090 kqread syslogd 28739 176452 1 0 3 0x100082 netio syslogd 34602 201284 1 0 3 0x100080 kqread resolvd 7050 267305 13051 77 3 0x100092 kqread dhcpleased 66711 51577 13051 77 3 0x100092 kqread dhcpleased 13051 360844 1 0 3 0x80 kqread dhcpleased 24334 150875 0 0 3 0x14200 bored smr 67257 225503 0 0 2 0x14200 zerothread 70793 103034 0 0 3 0x14200 aiodoned aiodoned 83793 431867 0 0 3 0x14200 syncer update 97480 344386 0 0 3 0x14200 cleaner cleaner 5298 350146 0 0 3 0x14200 reaper reaper 16587 224309 0 0 3 0x14200 pgdaemon pagedaemon 142 56200 0 0 3 0x14200 bored viomb 42621 269335 0 0 3 0x40014200 acpi0 acpi0 45259 460496 0 0 3 0x40014200 idle1 59049 149050 0 0 3 0x14200 bored softnet 65636 184072 0 0 3 0x14200 bored systqmp 50564 481984 0 0 3 0x14200 bored systq 79327 136343 0 0 3 0x40014200 bored softclock 28213 147479 0 0 3 0x40014200 idle0 1 196732 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829b5468) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_lower+0x7d0 sys/uvm/uvm_fault.c:1521 #4 uvm_fault+0x248 #5 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #6 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #7 recall_trap+0x8 Process 57533 (syz-executor.0) thread 0xffff8000212162a0 (215199) exclusive rwlock amaplk r = 0 (0xfffffd8067aba2e8) #0 witness_lock+0x44d #1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:774 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806cde8e88) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829b5468) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_lower+0x7d0 sys/uvm/uvm_fault.c:1521 #4 uvm_fault+0x248 #5 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #6 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #7 recall_trap+0x8 Process 42436 (syz-executor.1) thread 0xffff800021217260 (511654) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82abcc60) #0 witness_lock+0x44d #1 kpageflttrap+0x23d sys/arch/amd64/amd64/trap.c:274 #2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #3 alltraps_kern_meltdown+0x7b #4 socreate+0x84 sys/kern/uipc_socket.c:172 #5 sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10227 6414K 6419K 78643K 11421 0 pcb 13 20K 24K 78643K 21 0 rtable 266 7K 8K 78643K 4298 0 ifaddr 81 17K 17K 78643K 322 0 sysctl 3 1K 5K 78643K 54 0 counters 56 35K 35K 78643K 124 0 ioctlops 0 0K 2K 78643K 561 0 iov 0 0K 28K 78643K 7682 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1271 79K 79K 78643K 19139 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 571 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 7877 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 109K 78643K 47449 0 sigio 0 0K 0K 78643K 3386 0 proc 56 74K 111K 78643K 4106 0 subproc 104 6K 6K 78643K 546 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 87858 0 in_multi 99 6K 7K 78643K 1112 0 ether_multi 1 0K 0K 78643K 226 0 mrt 4 0K 0K 78643K 10 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 379 1685K 1685K 78643K 379 0 exec 0 0K 2K 78643K 7096 0 tdb 3 0K 0K 78643K 3 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 500 96K 114K 78643K 617423 0 UVM aobj 131 6K 6K 78643K 141 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1146 0 NDP 11 0K 2K 78643K 129 0 temp 125 4703K 4831K 78643K 114500 0 kqueue 12 18K 30K 78643K 3817 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 3974 0 3971 59 58 1 4 0 8 0 rtentry 112 595 0 471 4 0 4 4 0 8 0 unpcb 136 38760 0 38746 349 344 5 9 0 8 4 syncache 296 452 0 452 84 84 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 124 0 124 41 41 0 1 0 8 0 tcpcb 736 55458 0 55450 1077 1067 10 26 0 8 8 arp 120 103 0 85 1 0 1 1 0 8 0 ipq 40 105 0 105 26 26 0 1 0 8 0 ipqe 40 1376 0 1376 26 26 0 1 0 8 0 inpcb 304 77448 0 77435 714 704 10 17 0 8 8 rttmr 72 106 0 105 1 0 1 1 0 8 0 ip6q 72 108 0 108 21 20 1 1 0 8 1 ip6af 40 211 0 211 20 19 1 1 0 8 1 nd6 48 208 0 171 1 0 1 1 0 8 0 kcovpl 48 42 0 34 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2602 0 2046 50 13 37 41 0 8 0 art_table 32 2603 0 2046 6 0 6 6 0 8 0 art_node 16 594 0 480 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 21 1 0 1 1 0 8 0 semapl 112 7875 0 7865 1 0 1 1 0 8 0 shmpl 112 138 0 10 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 73191 0 71691 95 0 95 95 0 8 0 ffsino 272 73191 0 71691 101 0 101 101 0 8 0 nchpl 144 136558 0 134933 62 0 62 62 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 473857 0 473857 20 19 1 2 0 8 1 percpumem 16 74 0 34 1 0 1 1 0 8 0 scxspl 216 372227 0 372227 139 138 1 8 0 8 1 plimitpl 152 9383 0 9361 35 33 2 2 0 8 1 sigapl 424 47655 0 47604 7 1 6 7 0 8 0 futexpl 64 455741 0 455738 24 23 1 1 0 8 0 knotepl 120 2238 0 0 22 5 17 17 0 8 0 kqueuepl 216 17206 0 17198 286 283 3 8 0 8 2 pipepl 336 14139 0 14111 349 341 8 13 0 8 5 fdescpl 496 47640 0 47604 7 2 5 6 0 8 0 filepl 152 390676 0 390435 607 589 18 22 0 8 7 lockfpl 104 7926 0 7923 10 8 2 2 0 8 1 lockfspl 48 2012 0 2009 1 0 1 1 0 8 0 sessionpl 144 57 0 41 1 0 1 1 0 8 0 pgrppl 48 600 0 584 1 0 1 1 0 8 0 ucredpl 96 98518 0 98500 1 0 1 1 0 8 0 zombiepl 144 47604 0 47604 10 9 1 1 0 8 1 processpl 1064 47655 0 47604 5 1 4 4 0 8 0 procpl 672 143295 0 143230 47 40 7 8 0 8 0 sosppl 168 707 0 707 81 80 1 1 0 8 1 sockpl 480 121451 0 121421 2368 2356 12 42 0 8 7 mcl64k 65536 129 0 0 5 2 3 3 0 8 0 mcl16k 16384 105 0 0 5 2 3 3 0 8 0 mcl12k 12288 145 0 0 10 8 2 8 0 8 0 mcl9k 9216 73 0 0 4 2 2 2 0 8 0 mcl8k 8192 89 0 0 4 1 3 3 0 8 0 mcl4k 4096 74 0 0 4 2 2 3 0 8 0 mcl2k2 2112 15 0 0 1 0 1 1 0 8 0 mcl2k 2048 906 0 0 25 8 17 19 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 6020 0 0 336 1 335 335 0 8 0 bufpl 288 75137 0 68802 453 0 453 453 0 8 0 anonpl 24 14227049 0 14212141 576 455 121 145 0 186 0 amapchunkpl 152 1603674 0 1602872 594 558 36 50 0 158 2 amappl16 200 157517 0 157094 705 679 26 49 0 8 0 amappl15 192 10636 0 10629 1 0 1 1 0 8 0 amappl14 184 6797 0 6789 1 0 1 1 0 8 0 amappl13 176 5784 0 5781 1 0 1 1 0 8 0 amappl12 168 7831 0 7824 2 1 1 1 0 8 0 amappl11 160 6158 0 6141 1 0 1 1 0 8 0 amappl10 152 10769 0 10758 1 0 1 1 0 8 0 amappl9 144 1898 0 1895 1 0 1 1 0 8 0 amappl8 136 6108 0 5846 12 2 10 10 0 8 0 amappl7 128 3110 0 3098 1 0 1 1 0 8 0 amappl6 120 1745 0 1721 2 1 1 2 0 8 0 amappl5 112 49622 0 49600 1 0 1 1 0 8 0 amappl4 104 13910 0 13865 4 2 2 2 0 8 0 amappl3 96 12733 0 12717 1 0 1 1 0 8 0 amappl2 88 13826 0 13777 3 1 2 3 0 8 0 amappl1 80 858723 0 858089 35 20 15 18 0 8 0 amappl 88 614076 0 613794 13 5 8 8 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 72 140 0 10 3 0 3 3 0 8 0 uaddrrnd 24 47640 0 47604 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 47640 0 47604 1 0 1 1 0 8 0 vmmpekpl 168 395796 0 395739 4 1 3 4 0 8 0 vmmpepl 168 4379198 0 4376244 651 513 138 151 0 357 1 vmsppl 368 47639 0 47604 4 0 4 4 0 8 0 rwobjpl 56 1085970 0 1078332 152 40 112 114 0 8 0 pdppl 4096 95287 0 95208 1085 1004 81 87 0 8 2 pvpl 32 23322805 0 23302191 1314 1117 197 250 0 265 0 pmappl 248 47639 0 47604 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 3620 0 2462 34 0 34 34 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff828d5ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,20) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(65) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff82628fa1) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825d8c9e) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff80002e49dc70,0) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff80002e49dc70) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b socreate(18,ffff80002e49dd98,0,29) at socreate+0x84 sys/kern/uipc_socket.c:172 end trace frame: 0xffff80002e49de10, count: 0 ddb{0}> trace x86_ipi_db(ffffffff828d5ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,20) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(65) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff82628fa1) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825d8c9e) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff80002e49dc70,0) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff80002e49dc70) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b socreate(18,ffff80002e49dd98,0,29) at socreate+0x84 sys/kern/uipc_socket.c:172 sys_socket(ffff800021217260,ffff80002e49de28,ffff80002e49de80) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 syscall(ffff80002e49def0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e49def0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x832a9c40de0, count: -17 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xdc: movl $0,%gs:0x538 proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffc3f50, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffc3f50, count: -1