*cpu1: uvm_fault(0xfffff9806c65a3e8, 0x98, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x73c5acdd8540, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c481410 rbx 0 rdx 0 rcx 0xffff8000fffe94e8 rax 0x2a r8 0xffff80003c481340 r9 0 r10 0x50a7495b1a7c2742 r11 0x7a0cf1bac3e44ee r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8322f4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c481390 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=441988 pid=91532 tcnt=2 stat=onproc flags process=0 proc=0 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800038b982c8,0xffff800038b98d38 process=0xffff80003c455d08 user=0xffff80003c47c000, vmspace=0xfffff9806c65a3e8 estcpu=36, cpticks=1, pctcpu=0.0, user=1, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *91532 441988 12845 0 7 0 syz-executor 91532 486244 12845 0 7 0x4000000 syz-executor 23659 313833 88761 0 2 0 syz-executor 23659 403551 88761 0 3 0x4000080 fsleep syz-executor 13263 333748 71502 0 2 0 syz-executor 13263 357154 71502 0 3 0x4000080 fsleep syz-executor 13263 296693 71502 0 2 0x4000000 syz-executor 97465 137784 32649 0 2 0 syz-executor 97465 1109 32649 0 3 0x4000080 fsleep syz-executor 68088 116384 59345 0 2 0 syz-executor 68088 514987 59345 0 2 0x4000000 syz-executor 18194 72234 73595 0 3 0x80 nanoslp syz-executor 18194 347980 73595 0 3 0x4000080 sbwait syz-executor 18194 94115 73595 0 3 0x4000080 fsleep syz-executor 18194 286219 73595 0 3 0x4000080 fsleep syz-executor 92664 170582 129 0 3 0x80 nanoslp syz-executor 92664 269750 129 0 3 0x4000080 lockf syz-executor 92664 290916 129 0 3 0x4000080 lockf syz-executor 92664 436454 129 0 3 0x4000080 fsleep syz-executor 30820 25984 0 0 3 0x14280 nfsidl nfsio 52254 467946 0 0 3 0x14280 nfsidl nfsio 97874 284346 0 0 3 0x14280 nfsidl nfsio 37126 290952 0 0 3 0x14280 nfsidl nfsio 31044 418892 0 0 3 0x14280 nfsidl nfsio 17158 131191 0 0 3 0x14280 nfsidl nfsio 24221 362154 0 0 3 0x14280 nfsidl nfsio 94490 364053 0 0 3 0x14280 nfsidl nfsio 51727 504822 0 0 3 0x14280 nfsidl nfsio 67123 480106 0 0 3 0x14280 nfsidl nfsio 48553 371213 0 0 3 0x14280 nfsidl nfsio 88287 136423 0 0 3 0x14280 nfsidl nfsio 30353 438547 0 0 3 0x14280 nfsidl nfsio 82254 392714 0 0 3 0x14280 nfsidl nfsio 26445 355379 0 0 3 0x14280 nfsidl nfsio 63872 122932 0 0 3 0x14280 nfsidl nfsio 80844 221292 0 0 3 0x14280 nfsidl nfsio 36367 6857 0 0 3 0x14280 nfsidl nfsio 2778 17059 0 0 3 0x14280 nfsidl nfsio 84852 430213 0 0 3 0x14280 nfsidl nfsio 32649 176573 95619 0 3 0x82 nanoslp syz-executor 88761 409745 95619 0 3 0x82 nanoslp syz-executor 129 10480 95619 0 3 0x82 nanoslp syz-executor 59345 145871 95619 0 3 0x82 nanoslp syz-executor 13192 326356 95619 0 3 0x82 wait syz-executor 12845 498747 95619 0 3 0x82 nanoslp syz-executor 73595 153887 95619 0 3 0x82 nanoslp syz-executor 71502 261850 95619 0 3 0x82 nanoslp syz-executor 95619 236186 71785 0 3 0x82 kqread syz-executor 71785 261378 4263 0 3 0x10008a sigsusp ksh 4263 443186 49044 0 3 0x98 kqread sshd-session 49044 221818 45134 0 3 0x92 kqread sshd-session 12804 327774 1 0 3 0x100083 ttyopn getty 45134 513129 1 0 3 0x88 kqread sshd 18974 129639 26135 74 3 0x1100092 bpf pflogd 26135 392835 1 0 3 0x80 sbwait pflogd 95635 27802 74428 73 3 0x1100090 kqread syslogd 74428 340494 1 0 3 0x100082 sbwait syslogd 72490 121642 1 0 3 0x100080 kqread resolvd 64719 326086 75698 77 3 0x100092 kqread dhcpleased 28679 75324 75698 77 3 0x100092 kqread dhcpleased 75698 171893 1 0 3 0x80 kqread dhcpleased 24934 442508 0 0 3 0x14200 bored smr 5451 416665 0 0 2 0x14200 zerothread 89889 337058 0 0 3 0x14200 aiodoned aiodoned 86147 20480 0 0 3 0x14200 syncer update 99194 45965 0 0 3 0x14200 cleaner cleaner 20401 382907 0 0 3 0x14200 reaper reaper 49797 51017 0 0 3 0x14200 pgdaemon pagedaemon 56650 340216 0 0 3 0x14200 bored viomb 59739 427929 0 0 3 0x40014200 acpi0 acpi0 49385 255194 0 0 3 0x40014200 idle1 72377 477875 0 0 3 0x14200 bored softnet1 14852 463833 0 0 3 0x14200 bored softnet0 75775 29925 0 0 3 0x14200 bored systqmp 72537 42636 0 0 3 0x14200 bored systq 27294 387757 0 0 3 0x14200 tmoslp softclockmp 96342 229118 0 0 3 0x40014200 tmoslp softclock 63343 263881 0 0 3 0x40014200 idle0 1 471289 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 91532 (syz-executor) thread 0xffff8000fffe94e8 (441988) exclusive rwlock amaplk r = 0 (0xfffff98069b5bea0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffff9806c65a4e8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 91532 (syz-executor) thread 0xffff800038b99258 (486244) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a80780) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 Process 13263 (syz-executor) thread 0xffff800038b98d28 (296693) exclusive rwlock vmmaplk r = 0 (0xfffff9806c65a8b8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11096 12100K 12354K 166960K 12386 0 pcb 17 12K 12K 166960K 57 0 rtable 224 8K 8K 166960K 466 0 pf 35 17K 22K 166960K 69 0 ifaddr 41 7K 7K 166960K 54 0 ifgroup 52 2K 2K 166960K 70 0 sysctl 4 1K 9K 166960K 73 0 counters 70 37K 37K 166960K 84 0 ioctlops 0 0K 4K 166960K 1513 0 iov 0 0K 12K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1294 81K 82K 166960K 1512 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 16 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 317 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 147K 166960K 556 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 15 0 in_multi 90 6K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 409 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 250 159K 173K 166960K 4796 0 UVM aobj 7 4K 4K 166960K 7 0 pinsyscall 43 86K 105K 166960K 1503 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 12 0K 2K 166960K 34 0 temp 35 9114K 9178K 166960K 7577 0 kqueue 13 20K 27K 166960K 60 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 53 0 50 1 0 1 1 0 8 0 rtentry 176 112 0 16 5 0 5 5 0 8 0 unpcb 144 120 0 101 1 0 1 1 0 8 0 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpcb 736 39 0 35 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 185 0 178 3 1 2 2 0 8 1 nd6 152 24 0 0 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 6 0 6 2 1 1 1 0 8 1 pppxif 1576 1 0 1 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 4 0 2 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 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 30 0 0 1 0 1 1 0 8 0 pfstkey 128 34 0 4 1 0 1 1 0 8 0 pfstate 448 31 0 2 4 0 4 4 0 8 0 pfrule 1360 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 458 0 71 29 2 27 29 0 8 0 art_table 40 459 0 71 5 0 5 5 0 8 0 art_node 32 112 0 26 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 2 1 1 1 0 8 1 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 72 12 0 4 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1899 0 436 93 0 93 93 0 8 0 ffsino 296 1899 0 436 114 0 114 114 0 8 0 nchpl 144 2328 0 624 64 0 64 64 0 8 0 vnodes 216 2079 0 0 116 0 116 116 0 8 0 namei 1024 7495 0 7495 2 1 1 1 0 8 1 percpumem 16 57 0 7 1 0 1 1 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 kstatmem 264 39 0 12 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 7922 0 7922 4 3 1 3 1 8 1 plimitpl 152 51 0 34 1 0 1 1 0 8 0 sigapl 424 663 0 595 8 0 8 8 0 8 0 knotepl 120 335 0 0 11 0 11 11 0 8 0 kqueuepl 224 72 0 62 1 0 1 1 0 8 0 pipepl 344 140 0 113 3 0 3 3 0 8 0 fdescpl 528 627 0 595 3 0 3 3 0 8 0 filepl 160 2592 0 2371 13 0 13 13 0 8 2 lockfpl 104 109 0 103 1 0 1 1 0 8 0 lockfspl 48 54 0 50 1 0 1 1 0 8 0 sessionpl 144 66 0 57 1 0 1 1 0 8 0 pgrppl 48 77 0 60 1 0 1 1 0 8 0 ucredpl 104 379 0 366 1 0 1 1 0 8 0 zombiepl 144 617 0 616 1 0 1 1 0 8 0 processpl 1232 663 0 595 6 0 6 6 0 8 0 procpl 664 996 0 916 7 0 7 7 0 8 0 sockpl 752 366 0 337 5 1 4 5 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 155 0 0 10 0 10 10 0 8 0 bufpl 272 2752 0 106 177 0 177 177 0 8 0 anonpl 32 5552 0 0 45 0 45 45 0 246 0 amapchunkpl 152 14350 0 13830 34 8 26 29 0 158 2 amappl16 200 1611 0 1585 5 2 3 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 437 0 436 1 0 1 1 0 8 0 amappl13 176 122 0 110 1 0 1 1 0 8 0 amappl12 168 976 0 945 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 70 0 55 1 0 1 1 0 8 0 amappl9 144 277 0 277 1 1 0 1 0 8 0 amappl8 136 102 0 99 1 0 1 1 0 8 0 amappl7 128 150 0 137 1 0 1 1 0 8 0 amappl6 120 154 0 153 1 0 1 1 0 8 0 amappl5 112 105 0 95 1 0 1 1 0 8 0 amappl4 104 293 0 274 1 0 1 1 0 8 0 amappl3 96 2772 0 2649 4 0 4 4 0 8 0 amappl2 88 558 0 496 2 0 2 2 0 8 0 amappl1 80 11175 0 10558 15 1 14 15 0 8 0 amappl 88 4020 0 3843 5 0 5 5 0 92 0 uvmvnodes 80 105 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 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 128 254 0 254 2 1 1 1 0 8 1 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 627 0 595 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 627 0 595 1 0 1 1 0 8 0 vmmpekpl 168 7122 0 7084 3 0 3 3 0 8 0 vmmpepl 168 48012 0 46032 88 1 87 87 0 357 0 vmsppl 488 626 0 595 5 1 4 5 0 8 0 rwobjpl 80 16365 0 15307 24 1 23 24 0 8 0 pdppl 4096 1261 0 1190 101 30 71 85 0 8 0 pvpl 32 12847 0 0 104 0 104 104 0 265 0 pmappl 256 626 0 595 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 451 0 38 12 0 12 12 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: 0x73c5acdd8540, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 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_write_1(3f8,0,a) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,a) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,a) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff8345c86a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351f6d7) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c469370,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c469370) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800038b99258,fffff980646ca640,ffff80003c469550) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 end trace frame: 0xffff80003c4695c0, count: 0 ddb{1}> trace x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 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_write_1(3f8,0,a) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,a) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,a) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff8345c86a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351f6d7) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c469370,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c469370) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800038b99258,fffff980646ca640,ffff80003c469550) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff800038b99258,ffff80003c4696a0,ffff80003c4695f0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff80003c4696a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4696a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x49e69d43130, count: -17