*cpu1: uvm_fault(0xfffffd806b7d29a8, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x74bbe18a8d20, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000317e2250 rbx 0 rdx 0 rcx 0xffff80003c433250 rax 0x2a r8 0xffff8000317e2180 r9 0 r10 0x34be959d3f761a18 r11 0xa605d1f40f392b18 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81feb4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff8000317e21d0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=438950 pid=80642 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=0xffff80003c432028,0xffff80003c4334f8 process=0xffff8000fffed358 user=0xffff8000317dd000, vmspace=0xfffffd806b7d2020 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85477 463301 98120 0 2 0 syz-executor 85477 246730 98120 0 2 0x4000000 syz-executor *80642 438950 30386 0 7 0 syz-executor 14416 416144 77870 0 2 0 syz-executor 14416 468249 77870 0 2 0x4000000 syz-executor 53913 37865 80668 0 3 0x80 nanoslp syz-executor 53913 480266 80668 0 3 0x4000080 msgwait syz-executor 53913 319989 80668 0 3 0x4000080 fsleep syz-executor 64502 39650 37897 0 2 0 syz-executor 64502 183499 37897 0 3 0x4000080 fsleep syz-executor 59962 469557 0 0 3 0x14200 bored sosplice 5145 504587 54314 0 3 0x82 wait syz-executor 30386 141537 54314 0 3 0x82 nanoslp syz-executor 80668 340862 54314 0 3 0x82 nanoslp syz-executor 80165 327662 54314 0 2 0x2 syz-executor 37897 306790 54314 0 3 0x82 nanoslp syz-executor 98120 404494 54314 0 3 0x82 nanoslp syz-executor 56928 62449 54314 0 3 0x82 nanoslp syz-executor 77870 65012 54314 0 3 0x82 nanoslp syz-executor 54314 323485 15789 0 3 0x82 kqread syz-executor 15789 315066 67327 0 3 0x10008a sigsusp ksh 67327 246037 85335 0 3 0x98 kqread sshd-session 85335 394405 93284 0 3 0x92 kqread sshd-session 84638 81750 1 0 3 0x100083 ttyopn getty 93284 516422 1 0 3 0x88 kqread sshd 65749 407844 3449 74 3 0x1100092 bpf pflogd 3449 284697 1 0 3 0x80 sbwait pflogd 66438 257050 52313 73 3 0x1100090 kqread syslogd 52313 281214 1 0 3 0x100082 sbwait syslogd 20258 253420 1 0 3 0x100080 kqread resolvd 99427 69419 43755 77 3 0x100092 kqread dhcpleased 58931 520746 43755 77 3 0x100092 kqread dhcpleased 43755 270388 1 0 3 0x80 kqread dhcpleased 90870 102064 0 0 3 0x14200 bored smr 67693 488220 0 0 2 0x14200 zerothread 38908 481125 0 0 3 0x14200 aiodoned aiodoned 71044 204565 0 0 3 0x14200 syncer update 60257 198182 0 0 3 0x14200 cleaner cleaner 36459 372679 0 0 3 0x14200 reaper reaper 85993 105590 0 0 3 0x14200 pgdaemon pagedaemon 51249 300997 0 0 3 0x14200 bored viomb 75946 59102 0 0 3 0x40014200 acpi0 acpi0 64293 170036 0 0 3 0x40014200 idle1 95522 381296 0 0 3 0x14200 bored softnet1 23328 296979 0 0 3 0x14200 bored softnet0 37120 522822 0 0 3 0x14200 bored systqmp 67805 511310 0 0 3 0x14200 bored systq 34433 510450 0 0 3 0x14200 tmoslp softclockmp 15621 269372 0 0 3 0x40014200 tmoslp softclock 75868 324184 0 0 3 0x40014200 idle0 1 107237 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 (0xfffffd806b7e8910) #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 80642 (syz-executor) thread 0xffff80003c433250 (438950) exclusive rwlock amaplk r = 0 (0xfffffd806d03a5c8) #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_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvm_fault_check+0x597 sys/uvm/uvm_fault.c:862 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806b7d2120) #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:1924 #3 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b7e8910) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 11155K 11311K 166960K 11786 0 pcb 17 14K 16K 166960K 220 0 rtable 187 7K 7K 166960K 310 0 pf 33 17K 21K 166960K 74 0 ifaddr 39 6K 8K 166960K 58 0 ifgroup 51 2K 2K 166960K 81 0 sysctl 4 1K 9K 166960K 12 0 counters 66 36K 37K 166960K 106 0 ioctlops 0 0K 4K 166960K 1636 0 iov 0 0K 16K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1397 88K 89K 166960K 1780 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 18 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 495 0 sigio 0 0K 0K 166960K 8 0 proc 72 115K 180K 166960K 561 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 75 0 in_multi 88 6K 7K 166960K 116 0 ether_multi 1 0K 0K 166960K 4 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 453 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 236 172K 181K 166960K 6267 0 UVM aobj 25 2K 2K 166960K 26 0 pinsyscall 42 84K 103K 166960K 1623 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 35 0 NDP 11 0K 2K 166960K 38 0 temp 59 8647K 8711K 166960K 23787 0 kqueue 16 24K 35K 166960K 91 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 89 0 55 2 0 2 2 0 8 0 rtentry 176 101 0 23 5 0 5 5 0 8 0 unpcb 144 302 0 283 4 0 4 4 0 8 3 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 130 0 125 4 0 4 4 0 8 3 arp 136 11 0 1 1 0 1 1 0 8 0 inpcb 328 606 0 528 12 0 12 12 0 8 5 nd6 144 17 0 2 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 17 0 17 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 5 0 1 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 11 0 7 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 1 0 1 1 0 1 1 0 8 1 pfstitem 24 39 0 1 1 0 1 1 0 8 0 pfstkey 128 41 0 3 2 0 2 2 0 8 0 pfstate 384 40 0 2 4 0 4 4 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 508 0 121 30 0 30 30 0 8 3 art_table 40 509 0 121 5 0 5 5 0 8 0 art_node 32 100 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 9 1 0 1 1 0 8 0 semapl 112 15 0 6 1 0 1 1 0 8 0 shmpl 112 23 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2298 0 795 96 0 96 96 0 8 0 ffsino 296 2298 0 795 117 0 117 117 0 8 0 nchpl 144 3020 0 1332 63 0 63 63 0 8 0 rtmask 32 7 0 7 1 0 1 1 0 8 1 uvmvnodes 80 2628 0 0 54 0 54 54 0 8 0 vnodes 216 2628 0 0 146 0 146 146 0 8 0 namei 1024 9624 0 9624 2 1 1 2 0 8 1 percpumem 16 68 0 20 1 0 1 1 0 8 0 kstatmem 264 46 0 22 3 1 2 3 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 10632 0 10632 10 5 5 8 1 8 5 plimitpl 152 82 0 64 1 0 1 1 0 8 0 sigapl 424 807 0 759 7 1 6 7 0 8 0 knotepl 120 538 0 0 17 0 17 17 0 8 0 kqueuepl 224 209 0 197 2 0 2 2 0 8 1 pipepl 344 137 0 109 3 0 3 3 0 8 0 fdescpl 528 789 0 758 3 0 3 3 0 8 0 filepl 160 4203 0 3876 16 0 16 16 0 8 1 lockfpl 104 166 0 163 1 0 1 1 0 8 0 lockfspl 48 61 0 58 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 539 0 526 1 0 1 1 0 8 0 zombiepl 144 761 0 759 1 0 1 1 0 8 0 processpl 1232 807 0 759 5 1 4 5 0 8 0 procpl 664 1446 0 1393 6 0 6 6 0 8 0 sosppl 168 2 0 2 2 1 1 1 0 8 1 sockpl 752 1005 0 874 20 0 20 20 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 33 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1017 0 0 64 0 64 64 0 8 0 bufpl 280 4035 0 132 279 0 279 279 0 8 0 anonpl 32 8156 0 0 66 0 66 66 0 246 0 amapchunkpl 152 20484 0 19886 38 3 35 35 0 158 12 amappl16 200 2584 0 2519 19 7 12 17 0 8 7 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 121 0 109 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 1453 0 1422 3 1 2 2 0 8 0 amappl11 160 58 0 44 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 111 0 99 1 0 1 1 0 8 0 amappl6 120 187 0 184 1 0 1 1 0 8 0 amappl5 112 132 0 123 1 0 1 1 0 8 0 amappl4 104 310 0 289 1 0 1 1 0 8 0 amappl3 96 3379 0 3286 3 0 3 3 0 8 0 amappl2 88 1033 0 955 2 0 2 2 0 8 0 amappl1 80 10397 0 9794 15 0 15 15 0 8 0 amappl 88 5502 0 5342 5 0 5 5 0 92 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 7 0 7 2 1 1 1 0 8 1 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 25 0 1 1 0 1 1 0 8 0 uaddrrnd 24 789 0 758 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 789 0 758 1 0 1 1 0 8 0 vmmpekpl 168 7975 0 7934 3 0 3 3 0 8 0 vmmpepl 168 56132 0 54136 102 0 102 102 0 357 7 vmsppl 488 788 0 758 5 0 5 5 0 8 0 rwobjpl 80 20151 0 16542 75 0 75 75 0 8 0 pdppl 4096 1586 0 1516 106 32 74 86 0 8 4 pvpl 32 15570 0 0 127 1 126 126 0 265 0 pmappl 256 788 0 758 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 335 0 35 9 0 9 9 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: 0x74bbe18a8d20, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:662 comcnputc(800,d) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,d) at comcnputc+0x250 sys/dev/ic/com.c:1269 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 db_printf(ffffffff8331333c) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d8cc2) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003bc0c630,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003bc0c630) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001474000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,81,2000,ffff80003c4327f0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c4327f0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 end trace frame: 0xffff80003bc0c7d0, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:662 comcnputc(800,d) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,d) at comcnputc+0x250 sys/dev/ic/com.c:1269 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 db_printf(ffffffff8331333c) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d8cc2) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003bc0c630,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003bc0c630) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001474000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,81,2000,ffff80003c4327f0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c4327f0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003bc0c7e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062347520,81,fffffd80097fb618,ffff80003c4327f0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80687871b0,ffff80003c4327f0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80687871b0,ffff80003c4327f0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80687871b0,ffff80003c4327f0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80687871b0,ffff80003c4327f0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4327f0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4327f0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4327f0,ffff80003bc0cb50,ffff80003bc0caa0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003bc0cb50) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bc0cb50) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74d3c4faf0d0, count: -24