*cpu1: uvm_fault(0xfffffd806becf3d8, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7834fd57f7d0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a2f4f90 rbx 0 rdx 0 rcx 0xffff80002a280fb0 rax 0x2a r8 0xffff80002a2f4ec0 r9 0x4 r10 0x46339f41c253ad36 r11 0xdd63fac656506048 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81c8b4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a2f4f10 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=443500 pid=4026 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a281c80,0xffff80002a2802f0 process=0xffff8000fffef400 user=0xffff80002a2ef000, vmspace=0xfffffd8009eda000 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 4026 443500 2507 0 7 0 syz-executor 82866 289313 33695 0 2 0 syz-executor 82866 154148 33695 0 3 0x4000080 fsleep syz-executor 19997 224271 15114 0 3 0x80 nanoslp syz-executor 19997 314092 15114 0 3 0x4000080 fifor syz-executor 19997 355249 15114 0 3 0x4000080 fifor syz-executor 19997 439784 15114 0 3 0x4000080 fsleep syz-executor 9641 270551 56819 0 3 0x80 nanoslp syz-executor 9641 324995 56819 0 3 0x4000080 fifor syz-executor 7043 138633 2823 0 3 0x80 nanoslp syz-executor 7043 25459 2823 0 3 0x4000080 ttyopn syz-executor 7043 358057 2823 0 3 0x4000080 ttyopn syz-executor 34463 80730 0 0 3 0x14200 acct acct 24236 369913 15561 0 3 0x82 nanoslp syz-executor 2823 175794 15561 0 3 0x82 nanoslp syz-executor 56819 473895 15561 0 3 0x82 nanoslp syz-executor 1228 312071 15561 0 3 0x2 biowait syz-executor 2507 291404 15561 0 3 0x82 nanoslp syz-executor 33695 428442 15561 0 3 0x82 nanoslp syz-executor 15114 487863 15561 0 3 0x82 nanoslp syz-executor 87893 482887 15561 0 3 0x82 nanoslp syz-executor 69250 285624 1 0 3 0x100083 ttyin getty 52987 260041 0 0 3 0x14280 nfsidl nfsio 58364 112915 0 0 3 0x14280 nfsidl nfsio 93961 320964 0 0 3 0x14280 nfsidl nfsio 57355 396983 0 0 3 0x14280 nfsidl nfsio 14474 98033 0 0 3 0x14280 nfsidl nfsio 42318 364257 0 0 3 0x14280 nfsidl nfsio 13928 206085 0 0 3 0x14280 nfsidl nfsio 20338 320020 0 0 3 0x14280 nfsidl nfsio 37323 466963 0 0 3 0x14280 nfsidl nfsio 11637 157277 0 0 3 0x14280 nfsidl nfsio 48786 372162 0 0 3 0x14280 nfsidl nfsio 17606 496598 0 0 3 0x14280 nfsidl nfsio 68756 503730 0 0 3 0x14280 nfsidl nfsio 62742 92346 0 0 3 0x14280 nfsidl nfsio 63936 371121 0 0 3 0x14280 nfsidl nfsio 58994 92654 0 0 3 0x14280 nfsidl nfsio 64383 99969 0 0 3 0x14280 nfsidl nfsio 78105 124221 0 0 3 0x14280 nfsidl nfsio 49288 411911 0 0 3 0x14280 nfsidl nfsio 43761 167513 0 0 3 0x14280 nfsidl nfsio 48872 419379 0 0 3 0x14200 bored sosplice 15561 498039 89359 0 3 0x82 kqread syz-executor 89359 52212 15328 0 3 0x10008a sigsusp ksh 15328 438680 96716 0 3 0x98 kqread sshd-session 96716 379443 53222 0 3 0x92 kqread sshd-session 53222 308931 1 0 3 0x88 kqread sshd 69001 69911 13487 74 3 0x1100092 bpf pflogd 13487 70787 1 0 3 0x80 sbwait pflogd 87403 2554 91110 73 3 0x1100090 kqread syslogd 91110 515926 1 0 3 0x100082 sbwait syslogd 70991 368973 1 0 3 0x100080 kqread resolvd 96818 346125 74782 77 3 0x100092 kqread dhcpleased 22856 89800 74782 77 3 0x100092 kqread dhcpleased 74782 142044 1 0 3 0x80 kqread dhcpleased 23978 378385 0 0 3 0x14200 bored smr 448 233591 0 0 2 0x14200 zerothread 47163 337986 0 0 3 0x14200 aiodoned aiodoned 25279 383951 0 0 3 0x14200 syncer update 18167 460894 0 0 3 0x14200 cleaner cleaner 58967 335009 0 0 3 0x14200 reaper reaper 90364 430694 0 0 3 0x14200 pgdaemon pagedaemon 72274 479277 0 0 3 0x14200 bored viomb 66100 188646 0 0 3 0x40014200 acpi0 acpi0 54655 105593 0 0 3 0x40014200 idle1 1335 267244 0 0 3 0x14200 bored softnet3 53549 241762 0 0 3 0x14200 bored softnet2 48442 206802 0 0 3 0x14200 bored softnet1 64968 122749 0 0 3 0x14200 bored softnet0 90416 90083 0 0 3 0x14200 bored systqmp 66454 212169 0 0 3 0x14200 bored systq 94605 263093 0 0 3 0x14200 tmoslp softclockmp 41810 2424 0 0 3 0x40014200 tmoslp softclock 60218 149466 0 0 3 0x40014200 idle0 1 200046 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff8397bb58) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_fault_lower_lookup+0x2ef sys/uvm/uvm_fault.c:1281 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1370 #5 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 4026 (syz-executor) thread 0xffff80002a280fb0 (443500) Process 1228 (syz-executor) thread 0xffff80002a280050 (312071) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10512 12384K 12464K 166960K 19402 0 pcb 17 22K 24K 166960K 1605 0 rtable 329 18K 18K 166960K 2278 0 pf 38 18K 19K 166960K 528 0 ifaddr 45 9K 10K 166960K 422 0 ifgroup 59 2K 2K 166960K 714 0 sysctl 4 1K 9K 166960K 64 0 counters 70 37K 37K 166960K 910 0 ioctlops 0 0K 4K 166960K 3020 0 iov 0 0K 32K 166960K 708 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1649 104K 104K 166960K 7713 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 60K 100K 166960K 135 0 VM map 2 1K 1K 166960K 2 0 sem 24 61K 101K 166960K 188 0 dirhash 18 3K 3K 166960K 192 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 7683 0 sigio 0 0K 0K 166960K 301 0 proc 74 91K 140K 166960K 2187 0 subproc 72 4K 4K 166960K 354 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1376 0 in_multi 90 6K 7K 166960K 728 0 ether_multi 1 0K 0K 166960K 84 0 mrt 1 0K 0K 166960K 41 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 2020 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 22 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 249 162K 188K 166960K 68022 0 UVM aobj 106 4K 4K 166960K 113 0 pinsyscall 42 84K 105K 166960K 9770 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 353 0 NDP 13 0K 1K 166960K 307 0 temp 83 8684K 8940K 166960K 343538 0 kqueue 13 20K 32K 166960K 1478 0 SYN cache 2 10K 18K 166960K 3 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 120 676 0 672 3 2 1 2 0 8 0 rtentry 176 805 0 670 8 1 7 7 0 8 0 unpcb 144 7011 0 6988 56 50 6 9 0 8 5 syncache 336 47 0 47 9 9 0 1 0 8 0 tcpqe 32 27 0 27 12 12 0 1 0 8 0 tcpcb 808 2956 0 2949 73 71 2 14 0 8 1 arp 128 172 0 119 2 0 2 2 0 8 0 ipq 40 2 0 2 2 2 0 1 0 8 0 ipqe 40 6 0 6 2 2 0 1 0 8 0 inpcb 384 9674 0 9659 113 105 8 19 0 8 4 nd6 144 140 0 116 3 2 1 2 0 8 0 pkpcb 40 287 0 287 13 12 1 1 0 8 1 kcovpl 48 39 0 31 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 2 0 1 0 8 0 ppxss 1192 332 0 332 6 5 1 1 0 8 1 pppxif 1504 36 0 36 15 15 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 33 0 30 1 0 1 1 0 482 0 pffrnode 88 33 0 30 1 0 1 1 0 8 0 pffrent 40 66 0 63 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 1 0 0 1 0 1 1 0 8 0 pfstitem 24 431 0 337 1 0 1 1 0 8 0 pfstkey 128 433 0 339 5 0 5 5 0 8 0 pfstate 384 432 0 338 14 1 13 14 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 rttmr 136 11 0 11 8 8 0 1 0 8 0 art_heap8 4096 5 0 1 5 1 4 5 0 8 0 art_heap4 256 2720 0 2300 47 20 27 31 0 8 0 art_table 32 2725 0 2301 4 0 4 4 0 8 0 art_node 16 715 0 627 1 0 1 1 0 8 0 sysvmsgpl 40 32 0 23 2 1 1 1 0 8 0 semupl 112 6 0 6 3 3 0 1 0 8 0 semapl 112 136 0 114 1 0 1 1 0 8 0 shmpl 112 110 0 7 3 0 3 3 0 8 0 dirhash 1024 139 0 118 3 0 3 3 0 8 0 dino2pl 256 15764 0 14193 99 0 99 99 0 8 0 ffsino 288 15764 0 14193 113 0 113 113 0 8 0 nchpl 144 25893 0 25266 65 38 27 65 0 8 0 rtmask 32 55 0 55 16 16 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 106913 0 106912 9 8 1 4 0 8 0 percpumem 16 470 0 420 1 0 1 1 0 8 0 kstatmem 264 462 0 432 8 5 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 36 0 36 14 14 0 1 0 8 0 scxspl 216 86838 0 86837 20 18 2 8 1 8 1 plimitpl 152 1935 0 1917 1 0 1 1 0 8 0 sigapl 424 7971 0 7900 11 2 9 9 0 8 0 knotepl 120 991 0 0 25 0 25 25 0 8 0 kqueuepl 224 3471 0 3462 34 33 1 9 0 8 0 pipepl 336 1345 0 1318 21 18 3 8 0 8 0 fdescpl 520 7893 0 7862 3 0 3 3 0 8 0 filepl 160 67927 0 67636 77 59 18 25 0 8 3 lockfpl 104 2574 0 2571 2 1 1 2 0 8 0 lockfspl 48 874 0 871 1 0 1 1 0 8 0 sessionpl 144 103 0 94 1 0 1 1 0 8 0 pgrppl 48 446 0 429 1 0 1 1 0 8 0 ucredpl 104 12301 0 12288 1 0 1 1 0 8 0 zombiepl 144 8857 0 8855 4 3 1 1 0 8 0 processpl 1208 7971 0 7900 6 0 6 6 0 8 0 procpl 656 18903 0 18825 11 3 8 8 0 8 0 srpgc 96 66 0 66 11 11 0 1 0 8 0 sosppl 168 47 0 47 14 14 0 1 0 8 0 sockpl 728 18039 0 18000 192 180 12 26 0 8 8 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 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 120 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 53 0 0 5 0 5 5 0 8 0 mtagpl 96 233 0 0 6 2 4 6 0 8 0 mbufpl 256 1393 0 0 81 0 81 81 0 8 0 bufpl 280 24952 0 18810 440 0 440 440 0 8 0 anonpl 32 12120 0 0 99 1 98 98 0 246 0 amapchunkpl 152 233195 0 232626 97 70 27 36 0 158 0 amappl16 200 15192 0 15087 125 115 10 24 0 8 0 amappl15 192 8 0 8 4 4 0 1 0 8 0 amappl14 184 272 0 260 1 0 1 1 0 8 0 amappl13 176 9 0 9 4 4 0 1 0 8 0 amappl12 168 9088 0 9058 4 2 2 3 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 7 0 7 3 3 0 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 46 0 43 1 0 1 1 0 8 0 amappl7 128 227 0 214 1 0 1 1 0 8 0 amappl6 120 531 0 527 1 0 1 1 0 8 0 amappl5 112 259 0 249 1 0 1 1 0 8 0 amappl4 104 618 0 596 1 0 1 1 0 8 0 amappl3 96 49493 0 49382 5 1 4 4 0 8 0 amappl2 88 1445 0 1382 2 0 2 2 0 8 0 amappl1 80 51401 0 50801 18 2 16 16 0 8 0 amappl 88 65102 0 64929 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 263 0 263 6 6 0 1 0 8 0 dma64 64 9 0 9 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 112 0 7 2 0 2 2 0 8 0 uaddrrnd 24 7893 0 7862 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7893 0 7862 1 0 1 1 0 8 0 vmmpekpl 168 52611 0 52552 5 1 4 4 0 8 0 vmmpepl 168 489346 0 487237 180 82 98 115 0 357 0 vmsppl 480 7892 0 7862 5 0 5 5 0 8 0 rwobjpl 72 117617 0 110567 142 8 134 137 0 8 0 pdppl 4096 15793 0 15724 215 144 71 85 0 8 2 pvpl 32 20973 0 0 168 0 168 168 0 265 0 pmappl 256 7892 0 7862 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 712 0 281 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: 0x7834fd57f7d0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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(3f8,0,61) at x86_bus_space_io_write_1+0x42 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,61) at comcnputc+0x1ab bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,61) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(61) at cnputc+0x61 sys/dev/cons.c:218 kputchar(61,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff8343e2bb) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80002a3adda0,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:457 kerntrap(ffff80002a3adda0) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000149b000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(21e5f,81,2000,ffff8000ffff0f80) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000ffff0f80) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 end trace frame: 0xffff80002a3adf40, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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(3f8,0,61) at x86_bus_space_io_write_1+0x42 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,61) at comcnputc+0x1ab bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,61) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(61) at cnputc+0x61 sys/dev/cons.c:218 kputchar(61,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff8343e2bb) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80002a3adda0,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:457 kerntrap(ffff80002a3adda0) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000149b000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(21e5f,81,2000,ffff8000ffff0f80) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000ffff0f80) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3adf50) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8067176a50,81,fffffd807f7d38f0,ffff8000ffff0f80) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8064c5c640,ffff8000ffff0f80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8064c5c640,ffff8000ffff0f80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8064c5c640,ffff8000ffff0f80) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8064c5c640,ffff8000ffff0f80) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff8000ffff0f80) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff8000ffff0f80,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff0f80,ffff80002a3ae2c0,ffff80002a3ae210) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3ae2c0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3ae2c0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78dbf0212910, count: -24