*cpu0: uvm_fault(0xfffffd806eb57398, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7df858448fe0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800035cbe590 rbx 0 rdx 0 rcx 0xffff80003c4db218 rax 0x2a r8 0xffff800035cbe4c0 r9 0x1 r10 0xe606ececd71dd33 r11 0xaae7f6059d33c6ea r12 0 r13 0 r14 0 r15 0 rip 0xffffffff819044c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800035cbe510 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=285136 pid=86967 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4db9c8,0xffff80003c4db4b8 process=0xffff8000338b5bb8 user=0xffff800035cb9000, vmspace=0xfffffd806cc143b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 11796 512595 80124 0 2 0 syz-executor 11796 87973 80124 0 3 0x4000080 fsleep syz-executor *86967 285136 72004 0 7 0 syz-executor 86967 453650 72004 0 3 0x4000080 fsleep syz-executor 88834 35092 7519 0 2 0 syz-executor 88834 106842 7519 0 3 0x4000080 bell syz-executor 10431 71637 80196 -1 2 0x10 syz-executor 10431 183790 80196 -1 3 0x4000090 fsleep syz-executor 82558 264489 8181 0 2 0 syz-executor 82558 187348 8181 0 2 0x4000000 syz-executor 82558 84451 8181 0 3 0x4000080 fsleep syz-executor 97198 109549 47247 0 3 0x80 nanoslp syz-executor 97198 446646 47247 0 3 0x4000080 dtread syz-executor 97198 42233 47247 0 3 0x4000080 fsleep syz-executor 35493 161347 0 0 3 0x14200 bored sosplice 8181 209563 33013 0 2 0x482 syz-executor 72004 167040 33013 0 3 0x82 nanoslp syz-executor 901 76249 33013 0 3 0x82 nanoslp syz-executor 7519 314608 33013 0 2 0x482 syz-executor 80196 460410 33013 0 2 0x482 syz-executor 6186 463136 33013 0 2 0x482 syz-executor 47247 101356 33013 0 2 0x482 syz-executor 80124 167895 33013 0 2 0x482 syz-executor 33013 86091 71993 0 3 0x82 kqread syz-executor 71993 13336 70036 0 3 0x10008a sigsusp ksh 70036 180677 22933 0 3 0x98 kqread sshd-session 22933 114535 68469 0 3 0x92 kqread sshd-session 39105 389751 1 0 3 0x100083 ttyin getty 68469 236077 1 0 3 0x88 kqread sshd 44387 357072 81542 74 3 0x1100092 bpf pflogd 81542 162825 1 0 3 0x80 sbwait pflogd 27083 398452 46369 73 3 0x1100090 kqread syslogd 46369 218537 1 0 3 0x100082 sbwait syslogd 87072 274968 1 0 3 0x100080 kqread resolvd 56608 313257 98205 77 3 0x100092 kqread dhcpleased 36706 29858 98205 77 3 0x100092 kqread dhcpleased 98205 300983 1 0 3 0x80 kqread dhcpleased 24000 259383 0 0 3 0x14200 bored smr 71778 207329 0 0 2 0x14200 zerothread 81590 461958 0 0 3 0x14200 aiodoned aiodoned 11260 238574 0 0 3 0x14200 syncer update 27508 193831 0 0 3 0x14200 cleaner cleaner 11907 283160 0 0 3 0x14200 reaper reaper 44391 147406 0 0 3 0x14200 pgdaemon pagedaemon 56268 512466 0 0 3 0x14200 bored viomb 19458 115503 0 0 3 0x40014200 acpi0 acpi0 5915 484460 0 0 3 0x40014200 idle1 4970 255945 0 0 3 0x14200 bored softnet3 89332 424814 0 0 3 0x14200 bored softnet2 96251 482884 0 0 3 0x14200 bored softnet1 36870 439022 0 0 3 0x14200 bored softnet0 5127 91710 0 0 3 0x14200 bored systqmp 22070 297680 0 0 3 0x14200 bored systq 34585 270462 0 0 3 0x14200 tmoslp softclockmp 93730 435555 0 0 3 0x40014200 tmoslp softclock 90879 73877 0 0 3 0x40014200 idle0 1 426247 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff839ec878) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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+0x76d sys/uvm/uvm_fault.c:1510 #4 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 Process 86967 (syz-executor) thread 0xffff80003c4db218 (285136) exclusive rwlock uobjlk r = 0 (0xfffffd806ce58a18) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1173 #3 uvm_fault_lower+0x86 sys/uvm/uvm_fault.c:1310 #4 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806cc144b8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1860 #3 uvm_fault_check+0x4b sys/uvm/uvm_fault.c:730 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:666 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff839ec878) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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+0x76d sys/uvm/uvm_fault.c:1510 #4 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10209 11128K 11316K 166960K 11448 0 pcb 18 14K 16K 166960K 115 0 rtable 236 6K 6K 166960K 377 0 pf 35 17K 20K 166960K 56 0 ifaddr 43 7K 7K 166960K 51 0 ifgroup 55 2K 2K 166960K 66 0 sysctl 3 1K 1K 166960K 3 0 counters 64 36K 36K 166960K 72 0 ioctlops 0 0K 4K 166960K 1526 0 iov 0 0K 16K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1374 86K 87K 166960K 1621 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 5 2K 2K 166960K 9 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 234 0 proc 72 91K 128K 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 14 0 in_multi 99 7K 7K 166960K 102 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 384 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 251 168K 179K 166960K 3880 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 43 86K 106K 166960K 1342 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 12 0K 2K 166960K 32 0 temp 39 8679K 8746K 166960K 4535 0 kqueue 14 22K 26K 166960K 34 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 78 0 75 2 1 1 2 0 8 0 rtentry 168 118 0 7 5 0 5 5 0 8 0 unpcb 144 97 0 77 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 37 0 32 1 0 1 1 0 8 0 arp 120 20 0 2 1 0 1 1 0 8 0 inpcb 376 216 0 203 9 7 2 8 0 8 0 nd6 136 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 3 0 3 1 1 0 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 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 pfstitem 24 23 0 0 1 0 1 1 0 8 0 pfstkey 128 25 0 2 1 0 1 1 0 8 0 pfstate 376 24 0 1 3 0 3 3 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 256 454 0 3 29 0 29 29 0 8 0 art_table 32 455 0 3 4 0 4 4 0 8 0 art_node 16 117 0 16 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 2 2 0 1 0 8 0 semapl 112 5 0 2 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1896 0 387 96 0 96 96 0 8 0 ffsino 280 1896 0 387 109 0 109 109 0 8 0 nchpl 144 2222 0 531 63 0 63 63 0 8 0 uvmvnodes 80 2064 0 0 43 0 43 43 0 8 0 vnodes 216 2064 0 0 115 0 115 115 0 8 0 namei 1024 7434 0 7434 2 1 1 2 0 8 1 percpumem 16 50 0 4 1 0 1 1 0 8 0 kstatmem 264 32 0 8 2 0 2 2 0 8 0 scxspl 216 6727 0 6727 3 2 1 2 1 8 1 plimitpl 152 38 0 20 1 0 1 1 0 8 0 sigapl 424 542 0 491 7 1 6 7 0 8 0 futexpl 64 1740 0 1735 1 0 1 1 0 8 0 knotepl 120 418 0 0 13 0 13 13 0 8 0 kqueuepl 216 44 0 34 1 0 1 1 0 8 0 pipepl 328 110 0 82 3 0 3 3 0 8 0 fdescpl 504 523 0 491 6 1 5 5 0 8 0 filepl 152 2944 0 2632 18 5 13 16 0 8 0 lockfpl 104 119 0 116 1 0 1 1 0 8 0 lockfspl 48 23 0 20 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 640 0 626 1 0 1 1 0 8 0 zombiepl 144 546 0 544 2 1 1 1 0 8 0 processpl 1176 542 0 491 6 1 5 5 0 8 0 procpl 656 737 0 678 8 2 6 8 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 688 394 0 358 10 6 4 10 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 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 173 0 0 11 0 11 11 0 8 0 bufpl 280 2542 0 123 173 0 173 173 0 8 0 anonpl 24 109526 0 106133 37 12 25 34 0 184 0 amapchunkpl 152 11448 0 10927 27 3 24 27 0 158 2 amappl16 200 2058 0 2029 6 4 2 5 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 114 0 101 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 1179 0 1147 4 1 3 3 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 24 0 24 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 107 0 95 1 0 1 1 0 8 0 amappl6 120 194 0 191 1 0 1 1 0 8 0 amappl5 112 121 0 112 1 0 1 1 0 8 0 amappl4 104 317 0 299 1 0 1 1 0 8 0 amappl3 96 1949 0 1829 5 1 4 4 0 8 1 amappl2 88 654 0 592 2 0 2 2 0 8 0 amappl1 80 8723 0 8118 15 2 13 15 0 8 0 amappl 88 3163 0 2986 6 1 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 523 0 491 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 523 0 491 1 0 1 1 0 8 0 vmmpekpl 168 6023 0 5985 3 0 3 3 0 8 0 vmmpepl 168 39742 0 37718 93 4 89 90 0 357 0 vmsppl 456 522 0 491 6 2 4 5 0 8 0 rwobjpl 64 15798 0 12796 50 1 49 49 0 8 0 pdppl 4096 1054 0 982 106 34 72 86 0 8 0 pvpl 32 12617 0 0 102 0 102 102 0 265 0 pmappl 248 522 0 491 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 281 0 40 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837c6ff0) 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+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,72) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(72) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(72) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff8336ecc0) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c511140) at db_ktrap+0x101 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c511140) at db_ktrap+0x101 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c511140) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001489000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 end trace frame: 0xffff80003c511270, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837c6ff0) 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+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,72) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(72) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(72) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff8336ecc0) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c511140) at db_ktrap+0x101 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c511140) at db_ktrap+0x101 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c511140) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001489000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(21e5f,81,2000,ffff8000ffff7c50) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000ffff7c50) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c5112f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805be21128,81,fffffd807f7d2138,ffff8000ffff7c50) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8061bc3be8,ffff8000ffff7c50) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8061bc3be8,ffff8000ffff7c50) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8061bc3be8,ffff8000ffff7c50) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd8061bc3be8,ffff8000ffff7c50) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000ffff7c50) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000ffff7c50,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff7c50,ffff80003c511660,ffff80003c5115b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c511660) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c511660) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76f92bcd25e0, count: -25 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7df858448fe0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7df858448fe0, count: -1