panic: kernel diagnostic assertion "kq->kq_nknotes == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_event.c", line 214 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 368110 49945 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29 KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline] KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219 kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669 fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274 closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258 fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190 exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221 sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74f12697cd10, count: 3 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "kq->kq_nknotes == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_event.c", line 214 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29 KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline] KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219 kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669 fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274 closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258 fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190 exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221 sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74f12697cd10, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a11e7c0 rbx 0xffff800029b7cd87 rdx 0 rcx 0xffff8000345f6a60 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6a94aa55fc5bc984 r11 0x41a0e769379371eb r12 0xffff800029b7cb88 r13 0 r14 0 r15 0x1 rip 0xffffffff81c6f655 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a11e7b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=300778 pid=67984 tcnt=0 stat=onproc flags process=8001008 proc=2000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000345f6a60 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800034b9aa48,0xffff8000345f6050 process=0xffff800034a97ab0 user=0xffff80002a119000, vmspace=0xfffffd806c4b38b0 estcpu=33, cpticks=2, pctcpu=0.10, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95869 292164 84138 0 2 0x8000000 syz-executor 95869 450630 84138 0 3 0xc000080 fsleep syz-executor 29967 151055 63719 0 2 0x8000000 syz-executor 29967 482185 63719 0 3 0xc000080 fsleep syz-executor 87229 72675 18978 0 2 0x8000000 syz-executor 87229 356288 18978 0 3 0xc000080 fsleep syz-executor 87229 430651 18978 0 3 0xc000080 sbwait syz-executor 3979 164570 38208 0 2 0x8000000 syz-executor 3979 472865 38208 0 3 0xc000080 kqpoll syz-executor 3979 132144 38208 0 3 0xc000080 kqpoll syz-executor 3979 454610 38208 0 3 0xc000080 fsleep syz-executor 84693 282391 0 0 3 0x14200 acct acct 84138 36904 70410 0 3 0x8000082 nanoslp syz-executor 18978 206725 70410 0 3 0x8000082 nanoslp syz-executor 38208 397443 70410 0 2 0x8000482 syz-executor 63719 303109 70410 0 3 0x8000082 nanoslp syz-executor 64362 294291 70410 0 2 0x8000002 syz-executor 23379 297528 70410 0 3 0x8000002 biowait syz-executor 87171 56585 70410 0 3 0x8000082 nanoslp syz-executor 72023 403576 1 0 3 0x18100083 ttyin getty 29461 69155 0 0 3 0x14200 bored sosplice 70410 417022 60533 0 2 0x8000002 syz-executor 60533 223886 46879 0 3 0x810008a sigsusp ksh 46879 409605 8298 0 3 0x18000098 kqread sshd-session 8298 344959 47917 0 3 0x18000092 kqread sshd-session 47917 51141 1 0 3 0x18000088 kqread sshd 1405 100774 85402 74 3 0x19100092 bpf pflogd 85402 240475 1 0 3 0x18000080 sbwait pflogd 68006 512812 34494 73 3 0x19100010 ffs_fsync syslogd 34494 276894 1 0 3 0x18100082 sbwait syslogd 94472 512364 1 0 3 0x18100080 kqread resolvd 9579 64396 31237 77 3 0x18100092 kqread dhcpleased 27094 360119 31237 77 3 0x18100092 kqread dhcpleased 31237 241345 1 0 3 0x18000080 kqread dhcpleased 72344 106203 0 0 3 0x14200 bored smr 66013 279951 0 0 2 0x14200 zerothread 62416 491015 0 0 3 0x14200 aiodoned aiodoned 75810 233242 0 0 3 0x14200 syncer update 23139 274874 0 0 3 0x14200 cleaner cleaner 49945 368110 0 0 7 0x14200 reaper 88971 508783 0 0 3 0x14200 pgdaemon pagedaemon 42571 174996 0 0 3 0x14200 bored viomb 75058 187718 0 0 3 0x40014200 acpi0 acpi0 64614 288986 0 0 3 0x40014200 idle1 6007 217926 0 0 3 0x14200 bored softnet3 22968 404934 0 0 3 0x14200 bored softnet2 9575 175131 0 0 3 0x14200 bored softnet1 54737 177140 0 0 2 0x14200 softnet0 64666 78951 0 0 3 0x14200 bored systqmp 92316 325969 0 0 3 0x14200 bored systq 10726 363508 0 0 3 0x14200 tmoslp softclockmp 26588 310540 0 0 3 0x40014200 tmoslp softclock 66248 82802 0 0 3 0x40014200 idle0 1 451349 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd800812a3f8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_remove_ptes+0x297 sys/arch/amd64/amd64/pmap.c:1702 #4 pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1909 #5 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883 #6 uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520 #7 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 #8 reaper+0x25b sys/kern/kern_exit.c:480 #9 proc_trampoline+0x10 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806a014308) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_do_remove+0xa9 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:430 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1813 #4 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883 #5 uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520 #6 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 #7 reaper+0x25b sys/kern/kern_exit.c:480 #8 proc_trampoline+0x10 Process 23379 (syz-executor) thread 0xffff8000345f4cf8 (297528) exclusive rrwlock inode r = 0 (0xfffffd80779da818) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x171 sys/ufs/ufs/ufs_ihash.c:95 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80779dad68) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x218 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #12 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #12 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 Process 68006 (syslogd) thread 0xffff8000ffffdbe8 (512812) exclusive rrwlock inode r = 0 (0xfffffd806e4b11b0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2927 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 49945 (reaper) thread 0xffff800029fd9448 (368110) exclusive rwlock vmmaplk r = 0 (0xfffffd8077361b50) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5277 #3 uvm_map_teardown+0x104 sys/uvm/uvm_map.c:2488 #4 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 #5 reaper+0x25b sys/kern/kern_exit.c:480 #6 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10250 10261K 10775K 166960K 18192 0 pcb 17 17K 19K 166960K 697 0 rtable 213 16K 18K 166960K 5764 0 pf 42 19K 23K 166960K 650 0 ifaddr 41 8K 9K 166960K 772 0 ifgroup 64 2K 3K 166960K 850 0 sysctl 3 0K 1K 166960K 9 0 counters 68 36K 37K 166960K 488 0 ioctlops 0 0K 8K 166960K 2208 0 iov 1 2K 25K 166960K 408 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1644 103K 104K 166960K 7814 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 81 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 358 0 dirhash 15 2K 3K 166960K 129 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 14 49K 89K 166960K 5692 0 sigio 0 0K 0K 166960K 79 0 proc 70 91K 128K 166960K 5444 0 subproc 91 5K 7K 166960K 2262 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 786 0 in_multi 79 5K 7K 166960K 2009 0 ether_multi 1 0K 0K 166960K 16 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 313 1394K 1394K 166960K 313 0 exec 0 0K 1K 166960K 3258 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 231 85K 115K 166960K 46259 0 UVM aobj 115 8K 8K 166960K 120 0 pinsyscall 39 78K 101K 166960K 11089 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 168 0 NDP 14 0K 2K 166960K 572 0 temp 77 6816K 6944K 166960K 221141 0 kqueue 16 22K 30K 166960K 534 0 SYN cache 2 8K 16K 166960K 3 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 120 783 0 780 4 3 1 3 0 8 0 rtentry 112 2055 0 1966 6 3 3 4 0 8 0 unpcb 144 4790 0 4636 50 44 6 6 0 8 0 syncache 336 9 0 9 6 6 0 1 0 8 0 tcpcb 808 1912 0 1904 80 75 5 14 0 8 4 arp 120 366 0 351 1 0 1 1 0 8 0 ipq 40 2 0 2 2 2 0 1 0 8 0 ipqe 40 6 0 6 2 2 0 1 0 8 0 inpcb 336 6449 0 6435 92 85 7 14 0 8 5 nd6 136 571 0 549 3 2 1 2 0 8 0 pkpcb 40 20 0 20 9 8 1 1 0 8 1 kcovpl 48 174 0 167 1 0 1 1 0 8 0 ppxss 1168 34 0 34 10 10 0 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 39 0 34 2 1 1 1 0 482 0 pffrnode 88 39 0 34 2 1 1 1 0 8 0 pffrent 40 234 0 229 2 1 1 1 0 8 0 pfosfp 40 1439 0 1435 5 4 1 5 0 8 0 pfosfpen 112 1439 0 1430 21 20 1 21 0 8 0 pfrktable 1344 31 0 27 5 4 1 1 0 8 0 pfanchor 1288 9 0 7 4 3 1 1 0 8 0 pftag 88 14 0 13 4 3 1 1 0 8 0 pfqueue 264 2 0 1 2 1 1 1 0 8 0 pfstitem 24 364 0 337 1 0 1 1 0 8 0 pfstkey 128 367 0 339 2 0 2 2 0 8 0 pfstate 376 363 0 337 9 5 4 5 0 8 0 pfrule 1344 72 0 64 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 8091 0 7705 53 25 28 30 0 8 0 art_table 32 8092 0 7705 5 1 4 4 0 8 0 art_node 16 2043 0 1965 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 6 1 0 1 1 0 8 0 semapl 112 355 0 345 1 0 1 1 0 8 0 shmpl 112 117 0 5 4 0 4 4 0 8 0 dirhash 1024 98 0 78 4 1 3 4 0 8 0 dino2pl 256 8605 0 6766 117 1 116 116 0 8 0 ffsino 272 8605 0 6766 124 0 124 124 0 8 0 nchpl 144 13841 0 11927 73 1 72 72 0 8 0 uvmvnodes 80 8741 0 0 179 0 179 179 0 8 0 vnodes 216 8741 0 0 486 0 486 486 0 8 0 namei 1024 71879 0 71879 12 11 1 2 0 8 1 percpumem 16 258 0 210 1 0 1 1 0 8 0 vcpupl 3904 6 0 2 1 0 1 1 0 8 0 vmpool 696 19 0 15 1 0 1 1 0 8 0 pfiaddrpl 120 9 0 7 4 3 1 1 0 8 0 kstatmem 264 448 0 420 6 3 3 3 0 8 0 scsiplug 72 10 0 10 8 7 1 1 0 8 1 scxspl 216 113672 0 113670 20 19 1 8 1 8 0 plimitpl 152 1828 0 1811 1 0 1 1 0 8 0 sigapl 424 5684 0 5635 13 6 7 9 0 8 1 futexpl 64 69256 0 69252 16 15 1 1 0 8 0 knotepl 120 735 0 0 18 0 18 18 0 8 0 kqueuepl 216 1828 0 1815 31 29 2 8 0 8 0 pipepl 320 1287 0 1260 17 13 4 8 0 8 1 fdescpl 496 5643 0 5615 7 2 5 5 0 8 0 filepl 152 43763 0 43397 98 83 15 23 0 8 0 lockfpl 104 1814 0 1812 3 2 1 2 0 8 0 lockfspl 48 663 0 661 1 0 1 1 0 8 0 sessionpl 144 191 0 182 1 0 1 1 0 8 0 pgrppl 48 422 0 405 1 0 1 1 0 8 0 ucredpl 104 7343 0 7330 1 0 1 1 0 8 0 zombiepl 144 5637 0 5635 2 1 1 1 0 8 0 processpl 1152 5684 0 5635 7 3 4 6 0 8 0 procpl 648 11574 0 11515 12 5 7 9 0 8 1 srpgc 96 33 0 33 12 11 1 1 0 8 1 sosppl 168 20 0 20 10 9 1 1 0 8 1 sockpl 664 12193 0 12022 153 138 15 20 0 8 0 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 13 0 0 2 0 2 2 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 351 0 0 29 1 28 29 0 8 0 mtagpl 96 95 0 0 2 0 2 2 0 8 0 mbufpl 256 765 0 0 38 0 38 38 0 8 0 bufpl 280 17851 0 9110 625 0 625 625 0 8 0 anonpl 24 740753 0 732200 152 69 83 83 0 185 4 amapchunkpl 152 146658 0 146128 77 41 36 37 0 158 11 amappl16 200 12277 0 12026 116 89 27 27 0 8 0 amappl15 192 13 0 13 1 1 0 1 0 8 0 amappl14 184 452 0 440 1 0 1 1 0 8 0 amappl13 176 12 0 12 2 2 0 1 0 8 0 amappl12 168 8920 0 8892 4 2 2 3 0 8 0 amappl11 160 74 0 60 1 0 1 1 0 8 0 amappl10 152 12 0 12 1 1 0 1 0 8 0 amappl9 144 132 0 132 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 444 0 431 1 0 1 1 0 8 0 amappl6 120 1821 0 1819 1 0 1 1 0 8 0 amappl5 112 812 0 799 1 0 1 1 0 8 0 amappl4 104 855 0 834 1 0 1 1 0 8 0 amappl3 96 28969 0 28865 5 1 4 4 0 8 0 amappl2 88 2960 0 2892 2 0 2 2 0 8 0 amappl1 80 34498 0 33929 15 1 14 14 0 8 0 amappl 88 44441 0 44276 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 2 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 72 119 0 5 3 0 3 3 0 8 0 uaddrrnd 24 5662 0 5630 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5662 0 5630 1 0 1 1 0 8 0 vmmpekpl 168 49001 0 48942 4 0 4 4 0 8 0 vmmpepl 168 354662 0 352642 170 67 103 107 0 357 0 vmsppl 440 5661 0 5629 7 2 5 5 0 8 0 rwobjpl 56 100946 0 90931 154 11 143 143 0 8 1 pdppl 4096 11331 0 11262 328 252 76 85 0 8 7 pvpl 32 34680 0 0 276 1 275 275 0 265 0 pmappl 248 5661 0 5629 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 903 0 470 14 1 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8344dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:588 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:158 __mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 uvm_unmap_detach(ffff800029fe5080,1) at uvm_unmap_detach+0x16e sys/uvm/uvm_map.c:1371 uvm_map_teardown(fffffd8077361a60) at uvm_map_teardown+0x3f7 sys/uvm/uvm_map.c:2540 uvmspace_free(fffffd8077361a60) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 reaper(ffff800029fd9448) at reaper+0x25b sys/kern/kern_exit.c:480 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff8344dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c kd_curproc sys/dev/kcov.c:588 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c sys/dev/kcov.c:158 __mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835687c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 uvm_unmap_detach(ffff800029fe5080,1) at uvm_unmap_detach+0x16e sys/uvm/uvm_map.c:1371 uvm_map_teardown(fffffd8077361a60) at uvm_map_teardown+0x3f7 sys/uvm/uvm_map.c:2540 uvmspace_free(fffffd8077361a60) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 reaper(ffff800029fd9448) at reaper+0x25b sys/kern/kern_exit.c:480 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29 KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline] KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219 kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669 fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274 closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258 fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190 exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221 sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74f12697cd10, count: 3 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830d7f0b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8308b262,ffffffff830abac4,d6,ffffffff8300d45b) at __assert+0x29 KQRELE(fffffd8071c47e78) at KQRELE+0x30c klist_free sys/kern/kern_event.c:2098 [inline] KQRELE(fffffd8071c47e78) at KQRELE+0x30c sys/kern/kern_event.c:219 kqueue_close(fffffd8079f6fee0,ffff8000345f6a60) at kqueue_close+0x6a sys/kern/kern_event.c:1669 fdrop(fffffd8079f6fee0,ffff8000345f6a60) at fdrop+0x126 sys/kern/kern_descrip.c:1274 closef(fffffd8079f6fee0,ffff8000345f6a60) at closef+0x192 sys/kern/kern_descrip.c:1258 fdfree(ffff8000345f6a60) at fdfree+0x116 sys/kern/kern_descrip.c:1190 exit1(ffff8000345f6a60,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221 sys_exit(ffff8000345f6a60,ffff80002a11ebd0,ffff80002a11eb20) at sys_exit+0x1a syscall(ffff80002a11ebd0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a11ebd0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74f12697cd10, count: -12