*cpu1: uvm_fault(0xfffffd806c7887c0, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x768b00e7b9f0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c423480 rbx 0 rdx 0 rcx 0xffff80003c4122c0 rax 0x2a r8 0xffff80003c4233b0 r9 0x4 r10 0xc352626c61e63cef r11 0x8b4a7518b3496bc0 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82da24c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c423400 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=502552 pid=9402 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=0xffff8000fffeefa8,0xffff80003c412a98 process=0xffff80003c4149c0 user=0xffff80003c41e000, vmspace=0xfffffd806c7889a8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 9402 502552 77588 0 7 0 syz-executor 7305 362473 13786 0 2 0 syz-executor 7305 470794 13786 0 2 0x4000000 syz-executor 83744 399668 31593 0 2 0 syz-executor 90723 208768 1022 0 2 0 syz-executor 90723 372412 1022 0 2 0x4000000 syz-executor 72128 13675 58200 0 2 0 syz-executor 72128 269091 58200 0 3 0x4000080 fsleep syz-executor 98617 74498 21525 60929 2 0x10 syz-executor 98617 385748 21525 60929 3 0x4000090 fsleep syz-executor 58200 5313 17184 0 3 0x82 nanoslp syz-executor 13786 260991 17184 0 3 0x82 nanoslp syz-executor 3159 183562 17184 0 3 0x82 wait syz-executor 31593 366465 17184 0 3 0x82 nanoslp syz-executor 1933 373508 17184 0 2 0x2 syz-executor 1022 280587 17184 0 3 0x82 nanoslp syz-executor 77588 468693 17184 0 3 0x82 nanoslp syz-executor 21525 216586 17184 0 3 0x82 nanoslp syz-executor 17184 472375 49531 0 3 0x82 kqread syz-executor 49531 200433 6316 0 3 0x10008a sigsusp ksh 6316 361117 81206 0 3 0x98 kqread sshd-session 81206 7343 59552 0 3 0x92 kqread sshd-session 82038 478244 1 0 3 0x100083 ttyin getty 59552 80562 1 0 3 0x88 kqread sshd 69056 131863 1818 74 3 0x1100092 bpf pflogd 1818 450520 1 0 3 0x80 sbwait pflogd 77551 283393 83437 73 3 0x1100090 kqread syslogd 83437 5130 1 0 3 0x100082 sbwait syslogd 81323 230476 1 0 3 0x100080 kqread resolvd 45221 382844 62598 77 3 0x100092 kqread dhcpleased 70506 60513 62598 77 3 0x100092 kqread dhcpleased 62598 472189 1 0 3 0x80 kqread dhcpleased 40558 129398 0 0 3 0x14200 bored smr 83616 179861 0 0 2 0x14200 zerothread 19297 325839 0 0 3 0x14200 aiodoned aiodoned 98475 403091 0 0 3 0x14200 syncer update 65711 201250 0 0 3 0x14200 cleaner cleaner 94439 363796 0 0 3 0x14200 reaper reaper 15400 72376 0 0 3 0x14200 pgdaemon pagedaemon 45952 483998 0 0 3 0x14200 bored viomb 30710 397957 0 0 3 0x40014200 acpi0 acpi0 92163 475915 0 0 3 0x40014200 idle1 31860 316332 0 0 3 0x14200 bored softnet1 53072 79678 0 0 3 0x14200 bored softnet0 87004 281404 0 0 3 0x14200 bored systqmp 41115 504024 0 0 3 0x14200 bored systq 39144 423393 0 0 3 0x14200 tmoslp softclockmp 76686 497073 0 0 3 0x40014200 tmoslp softclock 37818 309729 0 0 3 0x40014200 idle0 1 316753 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c787510) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 Process 9402 (syz-executor) thread 0xffff80003c4122c0 (502552) shared rwlock uobjlk r = 0 (0xfffffd806f0bf7a8) #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_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806c788aa8) #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+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c787510) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11083 12202K 12329K 166960K 12393 0 pcb 17 13K 13K 166960K 50 0 rtable 250 9K 9K 166960K 385 0 pf 35 17K 18K 166960K 62 0 ifaddr 43 7K 7K 166960K 57 0 ifgroup 55 2K 2K 166960K 81 0 sysctl 3 1K 9K 166960K 8 0 counters 70 37K 38K 166960K 92 0 ioctlops 0 0K 4K 166960K 1485 0 iov 0 0K 2K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1342 84K 85K 166960K 1458 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 6 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 257 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 164K 166960K 546 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 8 0 in_multi 99 7K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 391 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 240 159K 173K 166960K 4098 0 UVM aobj 5 4K 4K 166960K 5 0 pinsyscall 43 86K 104K 166960K 1381 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 12 0K 1K 166960K 37 0 temp 38 8674K 8739K 166960K 4606 0 kqueue 13 20K 33K 166960K 54 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 38 0 35 1 0 1 1 0 8 0 rtentry 176 117 0 6 6 0 6 6 0 8 0 unpcb 144 108 0 91 2 0 2 2 0 8 1 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 68 0 63 4 0 4 4 0 8 3 arp 136 19 0 2 1 0 1 1 0 8 0 inpcb 328 294 0 286 7 0 7 7 0 8 6 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 8 0 8 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 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 2 0 0 1 0 1 1 0 8 0 pfrule 1360 5 0 3 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 475 0 16 30 0 30 30 0 8 0 art_table 40 477 0 16 5 0 5 5 0 8 0 art_node 32 117 0 17 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1798 0 289 95 0 95 95 0 8 0 ffsino 296 1798 0 289 117 0 117 117 0 8 0 nchpl 144 2169 0 469 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 1935 0 0 108 0 108 108 0 8 0 namei 1024 6766 0 6766 1 0 1 1 0 8 1 percpumem 16 61 0 11 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 848 1 0 0 1 0 1 1 0 8 0 kstatmem 264 44 0 18 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 7247 0 7247 10 2 8 8 1 8 8 plimitpl 152 77 0 60 1 0 1 1 0 8 0 sigapl 424 565 0 517 7 0 7 7 0 8 1 knotepl 120 290 0 0 9 0 9 9 0 8 0 kqueuepl 224 68 0 59 2 0 2 2 0 8 1 pipepl 344 190 0 161 9 0 9 9 0 8 6 fdescpl 528 549 0 517 3 0 3 3 0 8 0 filepl 160 2472 0 2249 15 0 15 15 0 8 5 lockfpl 104 51 0 49 1 0 1 1 0 8 0 lockfspl 48 21 0 19 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 208 0 194 1 0 1 1 0 8 0 zombiepl 144 519 0 517 1 0 1 1 0 8 0 processpl 1232 565 0 517 5 0 5 5 0 8 0 procpl 664 776 0 724 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 447 0 419 10 0 10 10 0 8 6 mcl64k 65536 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 149 0 0 10 0 10 10 0 8 0 bufpl 280 2533 0 131 172 0 172 172 0 8 0 anonpl 32 5551 0 0 45 0 45 45 0 246 0 amapchunkpl 152 12042 0 11565 28 0 28 28 0 158 6 amappl16 200 1654 0 1627 6 3 3 5 0 8 0 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 20 0 20 1 1 0 1 0 8 0 amappl13 176 425 0 424 1 0 1 1 0 8 0 amappl12 168 906 0 863 3 0 3 3 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 81 0 67 1 0 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 78 0 77 1 0 1 1 0 8 0 amappl6 120 273 0 260 1 0 1 1 0 8 0 amappl5 112 90 0 80 1 0 1 1 0 8 0 amappl4 104 425 0 396 1 0 1 1 0 8 0 amappl3 96 2036 0 1947 4 1 3 3 0 8 0 amappl2 88 657 0 581 2 0 2 2 0 8 0 amappl1 80 9569 0 8984 15 1 14 14 0 8 1 amappl 88 3354 0 3191 5 0 5 5 0 92 0 uvmvnodes 80 105 0 0 3 0 3 3 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 128 253 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 549 0 517 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 549 0 517 1 0 1 1 0 8 0 vmmpekpl 168 6517 0 6482 2 0 2 2 0 8 0 vmmpepl 168 42125 0 40201 87 0 87 87 0 357 2 vmsppl 488 548 0 517 5 0 5 5 0 8 0 rwobjpl 80 14353 0 13337 24 1 23 23 0 8 1 pdppl 4096 1107 0 1035 97 25 72 85 0 8 0 pvpl 32 13978 0 0 116 3 113 113 0 265 0 pmappl 256 549 0 517 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 271 0 28 8 0 8 8 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: 0x768b00e7b9f0, 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(3f8,0,2d) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,2d) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,2d) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(2d) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83350bbb) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83412454) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000307cb970,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000307cb970) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000160d000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 end trace frame: 0xffff8000307cbaa0, 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(3f8,0,2d) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,2d) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,2d) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(2d) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83350bbb) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83412454) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000307cb970,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000307cb970) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000160d000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffee018) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffee018) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000307cbb20) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8060289bd8,81,fffffd80097fd410,ffff8000fffee018) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c602e10,ffff8000fffee018) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c602e10,ffff8000fffee018) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c602e10,ffff8000fffee018) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c602e10,ffff8000fffee018) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffee018) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffee018,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee018,ffff8000307cbe90,ffff8000307cbde0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000307cbe90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000307cbe90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7eb0bf2336e0, count: -25