*cpu0: uvm_fault(0xfffffd806f1edcf8, 0x668, 0, 2) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffc58f0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800027afa9b0 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff800027afa8e0 r9 0 r10 0xc34064d0f91a4db9 r11 0x9c81926cf77761e r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8194e50c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff800027afa930 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{1}> show proc PROC (syz-executor.0) pid=331183 stat=onproc flags process=0 proc=0 pri=78, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800021242d28,0xffff8000212422b8 process=0xffff8000ffffa148 user=0xffff800027af5000, vmspace=0xfffffd8008586170 estcpu=29, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *66514 331183 35816 0 7 0 syz-executor.0 27823 305446 58534 0 2 0 syz-executor.3 46680 207059 32732 0 2 0 syz-executor.1 46680 495086 32732 0 7 0x4000000 syz-executor.1 87190 508299 37426 0 2 0 syz-executor.2 87190 246702 37426 0 2 0x4000000 syz-executor.2 58534 288235 58770 0 3 0x82 nanoslp syz-executor.3 58911 258617 0 0 3 0x14200 acct acct 63578 413023 0 0 3 0x14200 bored sosplice 37426 505175 58770 0 3 0x82 nanoslp syz-executor.2 32732 508987 58770 0 3 0x82 nanoslp syz-executor.1 35816 482022 58770 0 2 0x2 syz-executor.0 58770 219993 84656 0 3 0x82 thrsleep syz-fuzzer 58770 326906 84656 0 2 0x4000482 syz-fuzzer 58770 458445 84656 0 3 0x4000082 thrsleep syz-fuzzer 58770 496208 84656 0 3 0x4000082 thrsleep syz-fuzzer 58770 213848 84656 0 3 0x4000082 thrsleep syz-fuzzer 58770 426073 84656 0 3 0x4000082 thrsleep syz-fuzzer 58770 182935 84656 0 3 0x4000082 thrsleep syz-fuzzer 58770 373643 84656 0 3 0x4000082 thrsleep syz-fuzzer 58770 245345 84656 0 3 0x4000082 kqread syz-fuzzer 84656 362014 65815 0 3 0x10008a sigsusp ksh 65815 362214 20705 0 3 0x9a poll sshd 30128 451703 1 0 3 0x100083 ttyopn getty 20705 132405 1 0 3 0x88 poll sshd 42633 28977 46237 74 3 0x100092 bpf pflogd 46237 246187 1 0 3 0x80 netio pflogd 45303 29928 53101 73 3 0x100090 kqread syslogd 53101 86504 1 0 3 0x100082 netio syslogd 24750 437346 1 0 3 0x100080 kqread resolvd 26450 261830 16216 77 3 0x100092 kqread dhcpleased 7219 385277 16216 77 3 0x100092 kqread dhcpleased 16216 464717 1 0 3 0x80 kqread dhcpleased 65218 365583 0 0 3 0x14200 bored smr 62717 406342 0 0 2 0x14200 zerothread 67511 299921 0 0 3 0x14200 aiodoned aiodoned 23168 184129 0 0 3 0x14200 syncer update 70112 63993 0 0 3 0x14200 cleaner cleaner 45029 428757 0 0 3 0x14200 reaper reaper 60721 185016 0 0 3 0x14200 pgdaemon pagedaemon 93415 112316 0 0 3 0x14200 bored viomb 79549 457220 0 0 3 0x40014200 acpi0 acpi0 72382 111884 0 0 3 0x40014200 idle1 5385 146552 0 0 3 0x14200 bored softnet 54378 521673 0 0 3 0x14200 bored systqmp 70589 249269 0 0 3 0x14200 bored systq 64572 284181 0 0 3 0x40014200 bored softclock 76333 53897 0 0 3 0x40014200 idle0 1 46002 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807f000da0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_extract+0xa2 sys/arch/amd64/amd64/pmap.c:1517 #4 uvm_fault_upper_lookup+0x129 sys/uvm/uvm_fault.c:852 #5 uvm_fault+0x139 sys/uvm/uvm_fault.c:607 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 66514 (syz-executor.0) thread 0xffff800021243508 (331183) exclusive rwlock amaplk r = 0 (0xfffffd8068b1c7f8) #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 (0xfffffd8008586188) #0 witness_lock+0x44d #1 uvmfault_lookup+0xe9 sys/uvm/uvm_fault.c:1744 #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 &pmap->pm_mtx r = 0 (0xfffffd807f000da0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_extract+0xa2 sys/arch/amd64/amd64/pmap.c:1517 #4 uvm_fault_upper_lookup+0x129 sys/uvm/uvm_fault.c:852 #5 uvm_fault+0x139 sys/uvm/uvm_fault.c:607 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 46680 (syz-executor.1) thread 0xffff8000212422a8 (495086) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828f9c10) #0 witness_lock+0x44d #1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10167 6531K 6916K 78643K 11944 0 pcb 13 8K 8K 78643K 39 0 rtable 153 4K 5K 78643K 296 0 ifaddr 58 13K 13K 78643K 67 0 counters 48 34K 34K 78643K 50 0 ioctlops 0 0K 4K 78643K 1517 0 iov 0 0K 4K 78643K 16 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1237 78K 78K 78643K 1488 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 12 0K 0K 78643K 31 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 10 33K 49K 78643K 667 0 proc 69 87K 111K 78643K 440 0 subproc 52 3K 3K 78643K 65 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 44 0 in_multi 55 3K 3K 78643K 66 0 ether_multi 1 0K 0K 78643K 1 0 mrt 0 0K 0K 78643K 9 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 2K 78643K 496 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 251 45K 63K 78643K 9260 0 UVM aobj 13 2K 2K 78643K 13 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 14 0 NDP 10 0K 1K 78643K 19 0 temp 68 4190K 4258K 78643K 10146 0 kqueue 10 14K 18K 78643K 23 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 39 0 36 1 0 1 1 0 8 0 rtentry 112 83 0 17 2 0 2 2 0 8 0 unpcb 136 121 0 106 1 0 1 1 0 8 0 syncache 296 8 0 8 2 2 0 1 0 8 0 tcpqe 32 490 0 490 1 1 0 1 0 8 0 tcpcb 736 85 0 81 3 1 2 2 0 8 1 arp 120 12 0 2 1 0 1 1 0 8 0 inpcb 304 260 0 253 1 0 1 1 0 8 0 rttmr 72 4 0 4 2 1 1 1 0 8 1 nd6 48 16 0 4 1 0 1 1 0 8 0 kcovpl 48 5 0 1 1 0 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 pftag 88 8 0 8 1 0 1 1 0 8 1 pfstitem 24 33 0 11 1 0 1 1 0 8 0 pfstkey 112 33 0 11 1 0 1 1 0 8 0 pfstate 320 33 0 11 3 0 3 3 0 8 0 pfrule 1360 45 0 38 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 335 0 59 19 1 18 19 0 8 0 art_table 32 336 0 59 3 0 3 3 0 8 0 art_node 16 82 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semapl 112 29 0 19 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2191 0 776 89 0 89 89 0 8 0 ffsino 272 2191 0 776 95 0 95 95 0 8 0 nchpl 144 3097 0 1493 61 0 61 61 0 8 0 uvmvnodes 80 2434 0 0 50 0 50 50 0 8 0 vnodes 224 2434 0 0 144 0 144 144 0 8 0 namei 1024 8387 0 8387 1 0 1 1 0 8 1 percpumem 16 37 0 1 1 0 1 1 0 8 0 vmpool 560 1 0 1 1 0 1 1 0 8 1 scxspl 216 9171 0 9171 8 7 1 7 0 8 1 plimitpl 152 44 0 33 1 0 1 1 0 8 0 sigapl 424 904 0 865 5 0 5 5 0 8 0 futexpl 64 3396 0 3396 1 0 1 1 0 8 1 knotepl 112 66 0 0 2 0 2 2 0 8 0 kqueuepl 216 75 0 69 1 0 1 1 0 8 0 pipepl 336 109 0 93 2 0 2 2 0 8 0 fdescpl 496 888 0 865 4 1 3 4 0 8 0 filepl 152 2858 0 2707 7 0 7 7 0 8 1 lockfpl 104 64 0 62 1 0 1 1 0 8 0 lockfspl 48 33 0 31 1 0 1 1 0 8 0 sessionpl 144 21 0 8 1 0 1 1 0 8 0 pgrppl 48 21 0 8 1 0 1 1 0 8 0 ucredpl 96 281 0 269 1 0 1 1 0 8 0 zombiepl 144 865 0 865 1 0 1 1 0 8 1 processpl 1064 904 0 865 3 0 3 3 0 8 0 procpl 672 1572 0 1523 5 0 5 5 0 8 0 sosppl 168 12 0 12 2 1 1 1 0 8 1 sockpl 480 420 0 395 6 1 5 5 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k 2048 156 0 0 19 0 19 19 0 8 0 mtagpl 96 67 0 0 2 0 2 2 0 8 0 mbufpl 256 396 0 0 24 0 24 24 0 8 0 bufpl 288 4333 0 142 300 0 300 300 0 8 0 anonpl 24 204444 0 193476 84 2 82 82 0 186 5 amapchunkpl 152 27230 0 26609 47 12 35 46 0 158 10 amappl16 200 1898 0 1582 20 0 20 20 0 8 3 amappl15 192 1 0 0 1 0 1 1 0 8 0 amappl14 184 8 0 5 1 0 1 1 0 8 0 amappl13 176 49 0 46 1 0 1 1 0 8 0 amappl12 168 8 0 7 1 0 1 1 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 212 0 199 1 0 1 1 0 8 0 amappl9 144 414 0 412 1 0 1 1 0 8 0 amappl8 136 701 0 658 2 0 2 2 0 8 0 amappl7 128 400 0 383 1 0 1 1 0 8 0 amappl6 120 310 0 294 1 0 1 1 0 8 0 amappl5 112 1305 0 1282 1 0 1 1 0 8 0 amappl4 104 620 0 597 1 0 1 1 0 8 0 amappl3 96 170 0 154 1 0 1 1 0 8 0 amappl2 88 383 0 343 2 1 1 2 0 8 0 amappl1 80 17912 0 17416 13 1 12 13 0 8 0 amappl 88 8876 0 8691 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 72 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 889 0 866 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 889 0 866 1 0 1 1 0 8 0 vmmpekpl 168 9417 0 9388 2 0 2 2 0 8 0 vmmpepl 168 81380 0 79514 99 8 91 91 0 357 9 vmsppl 368 888 0 866 3 0 3 3 0 8 1 rwobjpl 56 22335 0 18746 51 0 51 51 0 8 0 pdppl 4096 1786 0 1732 74 20 54 62 0 8 0 pvpl 32 455133 0 440407 156 11 145 145 0 265 11 pmappl 248 888 0 866 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 643 0 24 18 0 18 18 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82779ff0) 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_write_1(3f8,0,32) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,32) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,32) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(32) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(32) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff824fe220) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff824b579c) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff800027b061a0,668) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff800027b061a0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pppacopen(4086331,1,2000,ffff8000212422a8) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 end trace frame: 0xffff800027b06310, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82779ff0) 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_write_1(3f8,0,32) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,32) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,32) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(32) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(32) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff824fe220) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff824b579c) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff800027b061a0,668) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff800027b061a0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pppacopen(4086331,1,2000,ffff8000212422a8) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b06328) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8069605b88,1,fffffd807f7d76c0,ffff8000212422a8) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b06578,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff8000212422a8,ffffff9c,20000100,0,0,ffff800027b06760) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b067d0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b067d0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2cbe70659f0, count: -20 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: 0x7f7ffffc58f0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffc58f0, count: -1