*cpu1: uvm_fault(0xfffffd806ef827a8, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xda05650b3d0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c5211f0 rbx 0 rdx 0 rcx 0xffff8000ffff22a8 rax 0x2a r8 0xffff80003c521120 r9 0x2 r10 0x90e95aed0862c2cb r11 0x367597e3626b752d r12 0 r13 0 r14 0 r15 0 rip 0xffffffff824204c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c521170 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=512121 pid=78180 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff2d08,0xffffffff838c5770 process=0xffff80003c4cc9c8 user=0xffff80003c51c000, vmspace=0xfffffd806ef821f0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78180 301248 55122 0 2 0 syz-executor *78180 512121 55122 0 7 0x4000000 syz-executor 32564 47607 13495 60929 3 0x90 nanoslp syz-executor 32564 100824 13495 60929 3 0x4000090 kqsel syz-executor 32564 125336 13495 60929 3 0x4000090 fsleep syz-executor 7278 497033 97515 0 3 0x80 nanoslp syz-executor 7278 352122 97515 0 3 0x4000080 sbwait syz-executor 7278 39196 97515 0 3 0x4000080 fsleep syz-executor 23085 509594 93554 0 3 0x80 nanoslp syz-executor 23085 492967 93554 0 3 0x4000080 kqread syz-executor 17283 293055 79468 60928 3 0x90 nanoslp syz-executor 17283 207945 79468 60928 3 0x4000090 ttyout syz-executor 17283 60255 79468 60928 3 0x4000090 fsleep syz-executor 86757 289367 36662 0 3 0x80 nanoslp syz-executor 86757 44750 36662 0 3 0x4000080 lockf syz-executor 86757 120012 36662 0 3 0x4000080 lockf syz-executor 86757 392300 36662 0 3 0x4000080 fsleep syz-executor 79468 264 9754 0 3 0x82 nanoslp syz-executor 89910 513436 0 0 3 0x14200 acct acct 93006 413650 0 0 3 0x14280 nfsidl nfsio 14091 61333 0 0 3 0x14280 nfsidl nfsio 48615 263353 0 0 3 0x14280 nfsidl nfsio 62355 494504 0 0 3 0x14280 nfsidl nfsio 47518 390007 0 0 3 0x14280 nfsidl nfsio 63397 437582 0 0 3 0x14280 nfsidl nfsio 16499 433433 0 0 3 0x14280 nfsidl nfsio 25681 481563 0 0 3 0x14280 nfsidl nfsio 6406 367809 0 0 3 0x14280 nfsidl nfsio 96378 502160 0 0 3 0x14280 nfsidl nfsio 83872 498176 0 0 3 0x14280 nfsidl nfsio 35594 245893 0 0 3 0x14280 nfsidl nfsio 6390 335440 0 0 3 0x14280 nfsidl nfsio 69788 204934 0 0 3 0x14280 nfsidl nfsio 70209 338461 0 0 3 0x14280 nfsidl nfsio 72102 434172 0 0 3 0x14280 nfsidl nfsio 53019 513407 0 0 3 0x14280 nfsidl nfsio 80646 66282 0 0 3 0x14280 nfsidl nfsio 31837 202633 0 0 3 0x14280 nfsidl nfsio 65735 25909 0 0 3 0x14280 nfsidl nfsio 93554 57146 9754 0 3 0x82 nanoslp syz-executor 36662 230493 9754 0 3 0x82 nanoslp syz-executor 97515 348370 9754 0 3 0x82 nanoslp syz-executor 83858 93431 9754 0 3 0x82 nanoslp syz-executor 99517 57910 9754 0 3 0x82 nanoslp syz-executor 55122 132829 9754 0 3 0x82 nanoslp syz-executor 13495 161608 9754 0 3 0x82 nanoslp syz-executor 54538 134036 1 0 3 0x100083 ttyin getty 9402 298447 0 0 3 0x14200 bored sosplice 9754 333960 81100 0 3 0x82 kqread syz-executor 81100 322839 64211 0 3 0x10008a sigsusp ksh 64211 107889 45232 0 3 0x98 kqread sshd-session 45232 75563 68650 0 3 0x92 kqread sshd-session 68650 276723 1 0 3 0x88 kqread sshd 19595 220696 60680 74 3 0x1100092 bpf pflogd 60680 287207 1 0 3 0x80 sbwait pflogd 22152 89011 97007 73 3 0x1100090 kqread syslogd 97007 403348 1 0 3 0x100082 sbwait syslogd 58112 74967 1 0 3 0x100080 kqread resolvd 88603 112748 0 0 3 0x14200 bored smr 13574 435526 0 0 2 0x14200 zerothread 55962 339507 0 0 3 0x14200 aiodoned aiodoned 28673 159979 0 0 3 0x14200 syncer update 74026 421087 0 0 3 0x14200 cleaner cleaner 86203 374683 0 0 3 0x14200 reaper reaper 52238 166952 0 0 3 0x14200 pgdaemon pagedaemon 55863 154875 0 0 3 0x14200 bored viomb 94742 395981 0 0 3 0x40014200 acpi0 acpi0 71635 201471 0 0 3 0x40014200 idle1 55929 36429 0 0 3 0x14200 bored softnet7 85330 142070 0 0 3 0x14200 bored softnet6 76340 213332 0 0 3 0x14200 bored softnet5 90280 253217 0 0 3 0x14200 bored softnet4 51094 433381 0 0 3 0x14200 bored softnet3 31120 213252 0 0 3 0x14200 bored softnet2 38210 79406 0 0 3 0x14200 bored softnet1 26185 359978 0 0 3 0x14200 bored softnet0 84517 80638 0 0 3 0x14200 bored systqmp 34482 127467 0 0 3 0x14200 bored systq 5603 326539 0 0 3 0x14200 tmoslp softclockmp 50986 256587 0 0 3 0x40014200 tmoslp softclock 90202 176956 0 0 3 0x40014200 idle0 1 8225 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b2a7910) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #4 uvm_fault_lower+0x608 sys/uvm/uvm_fault.c:1542 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #8 recall_trap+0x8 Process 78180 (syz-executor) thread 0xffff8000ffff22a8 (512121) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10270 11107K 12369K 166960K 17974 0 pcb 17 20K 31K 166960K 2500 0 rtable 218 18K 19K 166960K 1860 0 pf 46 19K 67487K 166960K 1085 0 ifaddr 36 9K 13K 166960K 544 0 ifgroup 67 2K 3K 166960K 1103 0 sysctl 4 1K 9K 166960K 174 0 counters 74 37K 38K 166960K 1566 0 ioctlops 0 0K 8K 166960K 4378 0 iov 0 0K 28K 166960K 832 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1548 97K 98K 166960K 9446 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 13K 166960K 144 0 VM map 2 1K 1K 166960K 2 0 sem 23 108K 108K 166960K 565 0 dirhash 12 2K 2K 166960K 210 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 9732 0 sigio 1 0K 0K 166960K 397 0 proc 70 99K 180K 166960K 1909 0 subproc 72 4K 4K 166960K 215 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 2158 0 in_multi 47 3K 7K 166960K 668 0 ether_multi 1 0K 0K 166960K 144 0 mrt 1 0K 0K 166960K 54 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 283 1261K 1261K 166960K 283 0 exec 0 0K 1K 166960K 2915 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 4K 166960K 21 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 246 144K 187K 166960K 89493 0 UVM aobj 8 2K 2K 166960K 9 0 pinsyscall 37 74K 106K 166960K 11079 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 730 0 NDP 15 0K 2K 166960K 430 0 temp 93 8652K 8908K 166960K 516788 0 kqueue 8 14K 32K 166960K 2125 0 SYN cache 2 8K 16K 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 1302 0 1299 12 11 1 3 0 8 0 rtentry 176 644 0 578 6 1 5 5 0 8 0 unpcb 144 8072 0 8058 50 47 3 10 0 8 2 syncache 336 18 0 18 6 6 0 1 0 8 0 tcpqe 32 9 0 9 5 5 0 1 0 8 0 tcpcb 736 4061 0 4057 91 85 6 13 0 8 5 arp 128 127 0 110 1 0 1 1 0 8 0 inpcb 328 12657 0 12650 104 97 7 18 0 8 5 nd6 144 72 0 61 1 0 1 1 0 8 0 pkpcb 40 74 0 74 17 16 1 1 0 8 1 kcovpl 48 23 0 15 1 0 1 1 0 8 0 mppekey 1024 10 0 10 8 8 0 1 0 8 0 ppxss 1192 637 0 637 6 5 1 1 0 8 1 pppxif 1504 52 0 52 15 14 1 1 0 8 1 pfstscr 40 8 0 8 2 2 0 1 0 8 0 pffrag 232 71 0 66 1 0 1 1 0 482 0 pffrnode 88 60 0 55 1 0 1 1 0 8 0 pffrent 40 185 0 180 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 pfrktable 1344 10 0 10 8 8 0 1 0 8 0 pfanchor 1288 4 0 1 2 1 1 1 0 8 0 pftag 88 2 0 1 2 1 1 1 0 8 0 pfstitem 24 550 0 440 1 0 1 1 0 8 0 pfstkey 128 558 0 448 5 0 5 5 0 8 0 pfstate 384 556 0 447 15 2 13 15 0 8 0 pfrule 1344 27 0 22 2 1 1 2 0 8 0 rttmr 136 8 0 8 5 5 0 1 0 8 0 art_heap8 4096 10 0 5 9 3 6 7 0 8 1 art_heap4 256 2162 0 1926 46 22 24 30 0 8 4 art_table 40 2172 0 1931 5 0 5 5 0 8 0 art_node 32 629 0 582 2 1 1 2 0 8 0 sysvmsgpl 40 25 0 13 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 538 0 517 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 dirhash 1024 150 0 133 3 0 3 3 0 8 0 dino2pl 256 20912 0 19351 98 0 98 98 0 8 0 ffsino 296 20912 0 19351 121 0 121 121 0 8 0 nchpl 144 34832 0 34242 64 39 25 64 0 8 0 rtmask 32 121 0 121 12 11 1 1 0 8 1 uvmvnodes 80 6107 0 0 125 0 125 125 0 8 0 vnodes 216 6107 0 0 340 0 340 340 0 8 0 namei 1024 124991 0 124991 11 10 1 3 0 8 1 percpumem 16 798 0 746 1 0 1 1 0 8 0 kstatmem 264 770 0 734 3 0 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 53 0 53 11 11 0 1 0 8 0 scxspl 216 200782 0 200782 41 39 2 8 1 8 2 plimitpl 152 2469 0 2450 1 0 1 1 0 8 0 sigapl 424 9953 0 9880 12 3 9 9 0 8 0 knotepl 120 963 0 0 24 0 24 24 0 8 0 kqueuepl 224 4716 0 4708 40 39 1 8 0 8 0 pipepl 344 1301 0 1274 29 26 3 9 0 8 0 fdescpl 528 9815 0 9786 3 0 3 3 0 8 0 filepl 160 77478 0 77259 93 74 19 24 0 8 7 lockfpl 104 4326 0 4306 7 6 1 2 0 8 0 lockfspl 48 1271 0 1256 1 0 1 1 0 8 0 sessionpl 144 49 0 41 1 0 1 1 0 8 0 pgrppl 48 209 0 193 1 0 1 1 0 8 0 ucredpl 104 14236 0 14222 1 0 1 1 0 8 0 zombiepl 144 13294 0 13292 2 1 1 1 0 8 0 processpl 1232 9953 0 9880 6 0 6 6 0 8 0 procpl 664 26277 0 26193 15 7 8 8 0 8 0 sosppl 168 71 0 71 14 13 1 1 0 8 1 sockpl 752 22503 0 22479 187 177 10 27 0 8 7 mcl64k 65536 36 0 0 4 1 3 4 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 107 0 0 8 0 8 8 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1407 0 0 74 0 74 74 0 8 0 bufpl 280 81281 0 75148 440 0 440 440 0 8 0 anonpl 32 18298 0 0 147 0 147 147 0 246 0 amapchunkpl 152 318438 0 317766 116 78 38 38 0 158 8 amappl16 200 32487 0 32354 157 132 25 40 0 8 5 amappl15 192 11 0 11 6 6 0 1 0 8 0 amappl14 184 167 0 158 1 0 1 1 0 8 0 amappl13 176 8 0 8 2 2 0 1 0 8 0 amappl12 168 10705 0 10676 4 2 2 3 0 8 0 amappl11 160 54 0 46 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 256 0 255 2 1 1 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 155 0 145 1 0 1 1 0 8 0 amappl6 120 338 0 334 1 0 1 1 0 8 0 amappl5 112 191 0 184 1 0 1 1 0 8 0 amappl4 104 364 0 343 1 0 1 1 0 8 0 amappl3 96 56500 0 56392 4 1 3 3 0 8 0 amappl2 88 10194 0 10128 2 0 2 2 0 8 0 amappl1 80 51929 0 51419 17 3 14 15 0 8 0 amappl 88 86645 0 86454 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 2 0 2 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 3 0 3 3 3 0 1 0 8 0 dma1024 1024 6 0 5 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 128 269 0 269 12 12 0 1 0 8 0 dma64 64 10 0 10 5 5 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 8 0 1 1 0 1 1 0 8 0 uaddrrnd 24 9816 0 9787 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9816 0 9787 1 0 1 1 0 8 0 vmmpekpl 168 70990 0 70919 4 0 4 4 0 8 0 vmmpepl 168 613829 0 611921 162 64 98 115 0 357 0 vmsppl 488 9815 0 9787 10 6 4 5 0 8 0 rwobjpl 80 153087 0 146025 162 8 154 156 0 8 0 pdppl 4096 19640 0 19574 175 107 68 88 0 8 2 pvpl 32 30327 0 0 243 1 242 242 0 265 0 pmappl 256 9815 0 9787 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 564 0 252 10 0 10 10 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: 0xda05650b3d0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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(3f8,0,20) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:782 comcnputc(800,20) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,20) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83312222) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d4c16) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a391310,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a391310) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001407000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 end trace frame: 0xffff80002a391440, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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(3f8,0,20) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:782 comcnputc(800,20) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,20) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83312222) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d4c16) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a391310,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a391310) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001407000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(31e5f,81,2000,ffff80002a315ce8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,81,2000,ffff80002a315ce8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3914c0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d908b48,81,fffffd80097fb068,ffff80002a315ce8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd800b6a6718,ffff80002a315ce8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd800b6a6718,ffff80002a315ce8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd800b6a6718,ffff80002a315ce8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd800b6a6718,ffff80002a315ce8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a315ce8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a315ce8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a315ce8,ffff80002a391830,ffff80002a391780) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a391830) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a391830) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ffb0562dd10, count: -25