*cpu0: uvm_fault(0xfffffd806ef79d60, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x778992e7ea40, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4852e0 rbx 0 rdx 0 rcx 0xffff80002a35ed38 rax 0x2a r8 0xffff80003c485210 r9 0xdde57801001 r10 0x76cc06f2f7bb6a4 r11 0x4bac04b1fcbc19cc r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82a594c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c485260 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=439434 pid=59919 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=0xffff80002a35eaa0,0xffffffff83899c70 process=0xffff800035427510 user=0xffff80003c480000, vmspace=0xfffffd806ef791f0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *59919 439434 72167 0 7 0 syz-executor 16968 281692 8051 60929 3 0x90 nanoslp syz-executor 16968 165298 8051 60929 3 0x4000090 sbwait syz-executor 16968 50537 8051 60929 3 0x4000090 fsleep syz-executor 16968 152109 8051 60929 3 0x4000090 fsleep syz-executor 64901 388732 65377 0 3 0x80 nanoslp syz-executor 64901 32860 65377 0 3 0x4000080 kqpoll syz-executor 64901 287922 65377 0 3 0x4000080 fsleep syz-executor 5885 407445 76349 0 3 0x80 nanoslp syz-executor 5885 37219 76349 0 3 0x4000080 fsleep syz-executor 5885 20962 76349 0 3 0x4000080 fsleep syz-executor 5885 124773 76349 0 3 0x4000080 kqread syz-executor 95461 253771 81860 0 3 0x82 nanoslp syz-executor 76349 59091 81860 0 3 0x82 nanoslp syz-executor 95819 451111 1 0 3 0x80 nanoslp init 72167 297108 81860 0 3 0x82 nanoslp syz-executor 8051 202131 81860 0 3 0x82 nanoslp syz-executor 94839 402951 0 0 3 0x14200 bored sosplice 83578 456379 81860 0 2 0x2 syz-executor 65377 39862 81860 0 3 0x82 nanoslp syz-executor 80767 50016 81860 0 3 0x82 nanoslp syz-executor 58859 248797 81860 0 3 0x82 nanoslp syz-executor 81860 187820 38054 0 3 0x82 kqread syz-executor 38054 413162 89735 0 3 0x10008a sigsusp ksh 89735 293172 70756 0 3 0x98 kqread sshd-session 70756 94586 19664 0 3 0x92 kqread sshd-session 19664 159299 1 0 3 0x88 kqread sshd 28006 49593 48091 74 3 0x1100092 bpf pflogd 48091 259565 1 0 3 0x80 sbwait pflogd 89389 481539 42962 73 3 0x1100090 kqread syslogd 42962 181963 1 0 3 0x100082 sbwait syslogd 18769 128038 1 0 3 0x100080 kqread resolvd 69671 470771 0 0 3 0x14200 bored smr 54312 476433 0 0 2 0x14200 zerothread 71569 288094 0 0 3 0x14200 aiodoned aiodoned 3271 443923 0 0 3 0x14200 syncer update 73206 43850 0 0 3 0x14200 cleaner cleaner 67264 260598 0 0 3 0x14200 reaper reaper 25947 5482 0 0 3 0x14200 pgdaemon pagedaemon 60304 351796 0 0 3 0x14200 bored viomb 42005 404340 0 0 3 0x40014200 acpi0 acpi0 20760 329124 0 0 3 0x40014200 idle1 62894 412392 0 0 3 0x14200 bored softnet7 94936 148473 0 0 3 0x14200 bored softnet6 86246 379297 0 0 3 0x14200 bored softnet5 28623 369565 0 0 3 0x14200 bored softnet4 36959 213793 0 0 3 0x14200 bored softnet3 39018 433828 0 0 3 0x14200 bored softnet2 62990 43008 0 0 3 0x14200 bored softnet1 24017 296819 0 0 3 0x14200 bored softnet0 60270 14270 0 0 3 0x14200 bored systqmp 53182 137286 0 0 3 0x14200 bored systq 70169 137153 0 0 3 0x14200 tmoslp softclockmp 61750 161167 0 0 3 0x40014200 tmoslp softclock 73835 214964 0 0 3 0x40014200 idle0 1 89313 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807550e010) #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_upper_lookup+0x337 sys/uvm/uvm_fault.c:-1 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:682 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 Process 59919 (syz-executor) thread 0xffff80002a35ed38 (439434) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10262 11093K 12350K 166960K 12946 0 pcb 23 16K 19K 166960K 579 0 rtable 183 13K 13K 166960K 645 0 pf 40 18K 81K 166960K 300 0 ifaddr 33 5K 8K 166960K 156 0 ifgroup 59 2K 3K 166960K 285 0 sysctl 3 1K 9K 166960K 51 0 counters 70 37K 38K 166960K 308 0 ioctlops 0 0K 4K 166960K 1890 0 iov 1 12K 20K 166960K 148 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1455 92K 92K 166960K 3099 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 9K 17K 166960K 41 0 VM map 2 1K 1K 166960K 2 0 sem 26 3K 4K 166960K 73 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 2303 0 sigio 0 0K 0K 166960K 112 0 proc 58 83K 163K 166960K 876 0 subproc 72 4K 4K 166960K 114 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 371 0 in_multi 48 3K 7K 166960K 224 0 ether_multi 1 0K 0K 166960K 21 0 mrt 0 0K 0K 166960K 11 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 707 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 224 138K 175K 166960K 22607 0 UVM aobj 163 9K 9K 166960K 165 0 pinsyscall 36 72K 103K 166960K 3510 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 193 0 NDP 13 0K 2K 166960K 117 0 temp 78 8652K 8728K 166960K 104159 0 kqueue 9 16K 32K 166960K 417 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 120 324 0 321 4 3 1 3 0 8 0 rtentry 176 179 0 122 5 0 5 5 0 8 0 unpcb 144 1627 0 1613 12 10 2 7 0 8 1 syncache 336 13 0 13 5 5 0 1 0 8 0 tcpcb 736 1077 0 1073 29 22 7 7 0 8 6 arp 128 25 0 13 1 0 1 1 0 8 0 inpcb 328 3351 0 3339 41 34 7 17 0 8 5 nd6 144 30 0 24 1 0 1 1 0 8 0 pkpcb 40 60 0 60 5 4 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 93 0 93 3 2 1 1 0 8 1 pppxif 1504 6 0 6 4 4 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 16 0 4 1 0 1 1 0 482 0 pffrnode 88 15 0 4 1 0 1 1 0 8 0 pffrent 40 24 0 11 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 6 0 4 2 1 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 5 0 2 2 1 1 1 0 8 0 pfstitem 24 73 0 63 1 0 1 1 0 8 0 pfstkey 128 76 0 66 2 0 2 2 0 8 0 pfstate 384 75 0 66 6 1 5 6 0 8 0 pfrule 1344 65 0 59 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 796 0 562 33 14 19 29 0 8 2 art_table 40 800 0 562 5 0 5 5 0 8 0 art_node 32 177 0 135 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 66 0 42 1 0 1 1 0 8 0 shmpl 112 162 0 2 5 0 5 5 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 5725 0 4214 95 0 95 95 0 8 0 ffsino 296 5725 0 4214 117 0 117 117 0 8 0 nchpl 144 8884 0 7180 64 0 64 64 0 8 0 rtmask 32 16 0 16 4 3 1 1 0 8 1 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 30800 0 30800 3 2 1 2 0 8 1 percpumem 16 169 0 119 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 192 0 158 4 1 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 8 0 8 4 4 0 1 0 8 0 scxspl 216 63930 0 63930 16 14 2 8 1 8 2 plimitpl 152 556 0 541 1 0 1 1 0 8 0 sigapl 424 2584 0 2532 7 0 7 7 0 8 0 knotepl 120 789 0 0 24 0 24 24 0 8 0 kqueuepl 224 924 0 915 12 11 1 5 0 8 0 pipepl 344 463 0 436 7 4 3 7 0 8 0 fdescpl 528 2550 0 2521 3 0 3 3 0 8 0 filepl 160 18639 0 18421 35 22 13 20 0 8 1 lockfpl 104 667 0 665 1 0 1 1 0 8 0 lockfspl 48 256 0 254 1 0 1 1 0 8 0 sessionpl 144 34 0 27 1 0 1 1 0 8 0 pgrppl 48 78 0 63 1 0 1 1 0 8 0 ucredpl 104 3199 0 3188 1 0 1 1 0 8 0 zombiepl 144 3462 0 3458 1 0 1 1 0 8 0 processpl 1232 2584 0 2532 5 0 5 5 0 8 0 procpl 664 6343 0 6283 9 2 7 7 0 8 0 sosppl 168 14 0 14 5 4 1 1 0 8 1 sockpl 752 5425 0 5396 70 60 10 25 0 8 6 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 37 0 0 5 0 5 5 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 287 0 0 18 0 18 18 0 8 0 bufpl 280 26208 0 19631 472 1 471 471 0 8 0 anonpl 32 18008 0 0 146 1 145 145 0 246 0 amapchunkpl 152 77694 0 77189 56 29 27 34 0 158 1 amappl16 200 10362 0 10330 99 78 21 51 0 8 8 amappl15 192 35 0 35 1 1 0 1 0 8 0 amappl14 184 139 0 131 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 3282 0 3253 4 1 3 3 0 8 0 amappl11 160 48 0 40 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 163 0 155 1 0 1 1 0 8 0 amappl6 120 227 0 223 1 0 1 1 0 8 0 amappl5 112 143 0 135 1 0 1 1 0 8 0 amappl4 104 330 0 311 1 0 1 1 0 8 0 amappl3 96 15916 0 15806 4 0 4 4 0 8 0 amappl2 88 776 0 728 2 0 2 2 0 8 0 amappl1 80 18645 0 18163 17 4 13 16 0 8 0 amappl 88 21434 0 21263 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 3 0 2 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 259 0 259 4 4 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 164 0 2 3 0 3 3 0 8 0 uaddrrnd 24 2550 0 2521 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2550 0 2521 1 0 1 1 0 8 0 vmmpekpl 168 21570 0 21518 3 0 3 3 0 8 0 vmmpepl 168 167807 0 166094 134 40 94 111 0 357 2 vmsppl 488 2549 0 2521 6 2 4 5 0 8 0 rwobjpl 80 51576 0 44710 153 4 149 149 0 8 1 pdppl 4096 5108 0 5042 118 50 68 86 0 8 2 pvpl 32 24178 0 0 195 0 195 195 0 265 0 pmappl 256 2549 0 2521 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 341 0 98 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8378aff0) 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_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,65) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff833159db) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d43c0) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c458c40,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c458c40) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c458d20, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8378aff0) 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_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,65) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff833159db) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d43c0) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c458c40,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c458c40) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001694000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,1,2000,ffff80002a35eaa0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a35eaa0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c458df0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806e089010,1,fffffd80097fb548,ffff80002a35eaa0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8073230938,ffff80002a35eaa0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8073230938,ffff80002a35eaa0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8073230938,ffff80002a35eaa0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8073230938,ffff80002a35eaa0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a35eaa0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a35eaa0,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a35eaa0,ffff80003c459160,ffff80003c4590b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c459160) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c459160) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7758fc0a7b40, count: -26 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x778992e7ea40, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x778992e7ea40, count: -1