panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 951 Starting stack trace... panic(ffffffff833722d8) at panic+0x1d0 sys/kern/subr_prf.c:229 __assert(ffffffff833b0390,ffffffff833c03bf,3b7,ffffffff833e9810) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80002a326928,ffffffff833680a2) at refcnt_finalize+0x1db sys/kern/kern_synch.c:952 pppx_if_destroy(205b9a,ffff80002a326920) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,83,2000,ffff80003a44b788) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002ebfb890) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c7f6eb8,83,fffffd80097fb5b0,ffff80003a44b788) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80647f70f8,ffff80003a44b788) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80647f70f8,ffff80003a44b788) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80647f70f8,ffff80003a44b788) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80647f70f8,ffff80003a44b788) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003a44b788) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003a44b788,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003a44b788,ffff80002ebfbc00,ffff80002ebfbb50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ebfbc00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebfbc00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a1e1bdb5e90, count: 242 End of stack trace. syncing disks...WARNING: SPL NOT LOWERED ON TRAP EXIT a 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *289730 94015 0 0 0 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70f1b5612930, count: 14 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu1: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 951 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70f1b5612930, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c457d70 rbx 0 rdx 0 rcx 0xffff800033409ca8 rax 0x2a r8 0xffff80003c457ca0 r9 0 r10 0xa43b61d4a2e4ecae r11 0x226ef96c64140e1d r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81b444c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c457cf0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=289730 pid=94015 tcnt=2 stat=onproc flags process=0 proc=0 runpri=82, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a440a88,0xffff8000334087f8 process=0xffff800037c26240 user=0xffff80003c452000, vmspace=0xfffffd800cf99d78 estcpu=32, cpticks=7, pctcpu=0.4, user=6, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96947 255674 82131 0 2 0 syz-executor 96947 93082 82131 0 3 0x4000080 fsleep syz-executor 96947 199759 82131 0 3 0x4000080 fsleep syz-executor 96271 372417 75363 0 2 0 syz-executor 96271 70018 75363 0 3 0x4000000 smrbar syz-executor *94015 289730 19346 0 7 0 syz-executor 94015 305270 19346 0 3 0x4000080 fsleep syz-executor 48427 174877 33687 0 4 0x82000 syz-executor 48427 438227 33687 0 2 0x4082000 syz-executor 48427 41934 33687 0 3 0x4002000 suspend syz-executor 35785 480674 33533 0 3 0x3000 suspend syz-executor 35785 480869 33533 0 3 0x4081000 biowait syz-executor 35785 438310 33533 0 3 0x4081000 inode syz-executor 35785 148759 33533 0 3 0x4081000 inode syz-executor 35785 416670 33533 0 3 0x4081000 inode syz-executor 35785 220222 33533 0 3 0x4081000 inode syz-executor 35785 281334 33533 0 3 0x4081000 inode syz-executor 35785 354130 33533 0 3 0x4081000 inode syz-executor 35785 411519 33533 0 3 0x4081000 inode syz-executor 82668 440946 0 0 3 0x14200 bored sosplice 53413 292990 86000 0 3 0x82 nanoslp syz-executor 19346 202476 86000 0 3 0x82 nanoslp syz-executor 33687 37526 86000 0 3 0x82 nanoslp syz-executor 75363 230828 86000 0 3 0x82 nanoslp syz-executor 82131 463153 86000 0 3 0x82 nanoslp syz-executor 2661 412825 86000 0 3 0x82 wait syz-executor 33533 445668 86000 0 3 0x82 wait syz-executor 76069 262220 86000 0 3 0x2 biowait syz-executor 86000 485233 875 0 3 0x82 kqread syz-executor 875 446359 7669 0 3 0x10008a sigsusp ksh 7669 428066 61402 0 3 0x98 kqread sshd-session 61402 56627 95947 0 3 0x92 kqread sshd-session 51275 300658 1 0 3 0x100083 ttyin getty 95947 427510 1 0 3 0x88 kqread sshd 31523 201717 31312 74 3 0x1100092 bpf pflogd 31312 249726 1 0 3 0x80 sbwait pflogd 10342 382565 55955 73 3 0x1100090 kqread syslogd 55955 346672 1 0 3 0x100082 sbwait syslogd 44518 240558 1 0 3 0x100080 kqread resolvd 94870 170675 59368 77 3 0x100092 kqread dhcpleased 53034 383470 59368 77 3 0x100092 kqread dhcpleased 59368 340927 1 0 3 0x80 kqread dhcpleased 39808 482549 0 0 3 0x14200 bored smr 32640 237761 0 0 2 0x14200 zerothread 42859 339516 0 0 3 0x14200 aiodoned aiodoned 72996 312423 0 0 3 0x14200 syncer update 90561 274728 0 0 3 0x14200 cleaner cleaner 43945 461085 0 0 2 0x14200 reaper 32982 150938 0 0 3 0x14200 pgdaemon pagedaemon 71916 93805 0 0 3 0x14200 bored viomb 63697 473737 0 0 3 0x40014200 acpi0 acpi0 66698 16449 0 0 3 0x40014200 idle1 76873 63915 0 0 3 0x14200 bored softnet7 58948 194844 0 0 3 0x14200 bored softnet6 51057 100566 0 0 3 0x14200 bored softnet5 63719 130592 0 0 3 0x14200 bored softnet4 21543 234028 0 0 3 0x14200 bored softnet3 78027 482691 0 0 3 0x14200 bored softnet2 24278 289939 0 0 3 0x14200 bored softnet1 33713 117547 0 0 3 0x14200 bored softnet0 51670 343797 0 0 3 0x14200 bored systqmp 73359 307253 0 0 3 0x14200 bored systq 26509 41442 0 0 3 0x14200 tmoslp softclockmp 64056 396593 0 0 3 0x40014200 tmoslp softclock 11558 178604 0 0 3 0x40014200 idle0 1 376752 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8008fc00c0) #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_remove_ptes+0x29f pmap_remove_pv sys/arch/amd64/amd64/pmap.c:-1 [inline] #3 pmap_remove_ptes+0x29f sys/arch/amd64/amd64/pmap.c:1711 #4 pmap_do_remove+0x589 sys/arch/amd64/amd64/pmap.c:1920 #5 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #6 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #6 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #7 exit1+0x6fc sys/kern/kern_exit.c:260 #8 proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235 #9 userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline] #9 userret+0x8c sys/kern/kern_sig.c:2194 #10 Xsyscall+0x156 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b797510) #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_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #4 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #6 exit1+0x6fc sys/kern/kern_exit.c:260 #7 proc_suspend_check_locked+0x2fd sys/kern/kern_sig.c:2235 #8 userret+0x8c proc_suspend_check sys/kern/kern_sig.c:-1 [inline] #8 userret+0x8c sys/kern/kern_sig.c:2194 #9 Xsyscall+0x156 Process 35785 (syz-executor) thread 0xffff80003a440028 (480869) exclusive rrwlock inode r = 0 (0xfffffd806e2150f8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 35785 (syz-executor) thread 0xffff80003a44a2c8 (438310) exclusive rrwlock inode r = 0 (0xfffffd8079aa97f8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domknodat+0xb4 sys/kern/vfs_syscalls.c:1592 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 76069 (syz-executor) thread 0xffff80002a2b9770 (262220) exclusive rrwlock inode r = 0 (0xfffffd806b701ec8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c7a68e0) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 11087K 11790K 166960K 11810 0 pcb 17 14K 14K 166960K 140 0 rtable 208 8K 8K 166960K 338 0 pf 41 19K 82K 166960K 98 0 ifaddr 46 8K 8K 166960K 72 0 ifgroup 60 2K 2K 166960K 112 0 sysctl 3 1K 9K 166960K 8 0 counters 72 37K 37K 166960K 124 0 ioctlops 0 0K 4K 166960K 1543 0 iov 0 0K 20K 166960K 18 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1438 90K 90K 166960K 1752 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 232K 166960K 545 0 sigio 0 0K 0K 166960K 12 0 proc 72 115K 164K 166960K 595 0 subproc 72 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 57 0 in_multi 103 7K 7K 166960K 131 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 421 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 247 160K 174K 166960K 6573 0 UVM aobj 12 2K 2K 166960K 12 0 pinsyscall 41 82K 102K 166960K 1656 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 27 0 NDP 13 0K 1K 166960K 49 0 temp 81 8648K 8766K 166960K 21505 0 kqueue 14 22K 38K 166960K 103 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 120 131 0 128 3 0 3 3 0 8 2 rtentry 176 116 0 28 5 0 5 5 0 8 0 unpcb 144 263 0 244 2 1 1 2 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 4 0 4 1 0 1 1 0 8 1 tcpcb 736 184 0 175 7 0 7 7 0 8 6 arp 128 12 0 2 1 0 1 1 0 8 0 inpcb 328 571 0 559 7 0 7 7 0 8 5 nd6 144 21 0 2 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 21 0 20 1 0 1 1 0 8 0 pppxif 1504 1 0 0 1 0 1 1 0 8 0 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 5 0 3 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 0 5 5 0 8 5 pfosfpen 112 1428 0 1428 21 0 21 21 0 8 21 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 39 0 2 1 0 1 1 0 8 0 pfstkey 128 39 0 2 2 0 2 2 0 8 0 pfstate 384 39 0 2 4 0 4 4 0 8 0 pfrule 1344 23 0 16 2 1 1 2 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 525 0 86 30 1 29 30 0 8 0 art_table 40 526 0 86 5 0 5 5 0 8 0 art_node 32 115 0 37 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2313 0 801 96 0 96 96 0 8 0 ffsino 296 2313 0 801 118 0 118 118 0 8 0 nchpl 144 3008 0 1311 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 1 0 1 0 8 0 uvmvnodes 80 2638 0 0 54 0 54 54 0 8 0 vnodes 216 2638 0 0 147 0 147 147 0 8 0 namei 1024 9804 0 9797 3 1 2 2 0 8 1 percpumem 16 77 0 26 1 0 1 1 0 8 0 kstatmem 264 64 0 36 3 1 2 3 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 14447 0 14413 10 2 8 8 1 8 6 plimitpl 152 100 0 78 1 0 1 1 0 8 0 sigapl 424 839 0 785 7 0 7 7 0 8 0 knotepl 120 587 0 0 18 0 18 18 0 8 0 kqueuepl 224 165 0 154 2 1 1 2 0 8 0 pipepl 344 150 0 123 3 0 3 3 0 8 0 fdescpl 528 815 0 785 3 0 3 3 0 8 0 filepl 160 4198 0 3907 16 0 16 16 0 8 3 lockfpl 104 341 0 339 2 0 2 2 0 8 1 lockfspl 48 61 0 59 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 511 0 497 1 0 1 1 0 8 0 zombiepl 144 787 0 785 1 0 1 1 0 8 0 processpl 1248 839 0 785 5 0 5 5 0 8 0 procpl 664 1522 0 1454 7 0 7 7 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 752 977 0 943 11 0 11 11 0 8 6 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 49 0 0 7 0 7 7 0 8 0 mtagpl 96 33 0 0 1 0 1 1 0 8 0 mbufpl 256 251 0 0 16 0 16 16 0 8 0 bufpl 280 5754 0 125 403 0 403 403 0 8 0 anonpl 32 10287 0 0 83 0 83 83 0 246 0 amapchunkpl 152 20811 0 20301 37 3 34 34 0 158 9 amappl16 200 2802 0 2590 22 2 20 20 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 119 0 107 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1492 0 1462 4 1 3 3 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 21 0 20 1 0 1 1 0 8 0 amappl9 144 271 0 270 1 0 1 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 113 0 101 1 0 1 1 0 8 0 amappl6 120 191 0 188 1 0 1 1 0 8 0 amappl5 112 126 0 117 1 0 1 1 0 8 0 amappl4 104 306 0 286 1 0 1 1 0 8 0 amappl3 96 3900 0 3786 4 0 4 4 0 8 0 amappl2 88 668 0 606 2 0 2 2 0 8 0 amappl1 80 10344 0 9745 16 1 15 15 0 8 0 amappl 88 5811 0 5636 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 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 128 254 0 254 2 2 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 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 815 0 785 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 815 0 785 1 0 1 1 0 8 0 vmmpekpl 168 8285 0 8246 3 0 3 3 0 8 0 vmmpepl 168 57589 0 55452 106 0 106 106 0 357 0 vmsppl 488 814 0 784 5 0 5 5 0 8 0 rwobjpl 80 20573 0 16792 82 0 82 82 0 8 1 pdppl 4096 1638 0 1568 110 38 72 84 0 8 2 pvpl 32 18422 0 0 149 0 149 149 0 265 0 pmappl 256 814 0 784 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 297 0 42 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: 0x70f1b5612930, 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 __mp_lock(ffffffff83892778) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83892778) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83892778,3) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 tsleep_nsec(ffffffff8391edac,4,ffffffff833fc029,ffffffffffffffff) at tsleep_nsec+0x23d sys/kern/kern_synch.c:-1 uvn_io(fffffd806d5cf660,ffff80002ebfb3a0,1,31,1) at uvn_io+0x7b5 sys/uvm/uvm_vnode.c:1310 uvn_put(fffffd806d5cf660,ffff80002ebfb3a0,1,31) at uvn_put+0x125 sys/uvm/uvm_vnode.c:922 uvm_pager_put(fffffd806d5cf660,fffffd800848e4c0,ffff80002ebfb430,ffff80002ebfb464,31,0,3998d1368c078baf) at uvm_pager_put+0x164 sys/uvm/uvm_pager.c:524 uvn_flush(fffffd806d5cf660,0,0,31) at uvn_flush+0x6aa sys/uvm/uvm_vnode.c:723 uvm_vnp_sync(ffff800000b4a800) at uvm_vnp_sync+0x1e7 sys/uvm/uvm_vnode.c:1532 sys_sync(ffff80003a44b788,0,0) at sys_sync+0xda sys/kern/vfs_syscalls.c:534 vfs_syncwait(ffff80003a44b788,1) at vfs_syncwait+0x44 sys/kern/vfs_subr.c:-1 vfs_shutdown(ffff80003a44b788) at vfs_shutdown+0x97 sys/kern/vfs_subr.c:1810 end trace frame: 0xffff80002ebfb630, 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 __mp_lock(ffffffff83892778) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83892778) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83892778,3) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 tsleep_nsec(ffffffff8391edac,4,ffffffff833fc029,ffffffffffffffff) at tsleep_nsec+0x23d sys/kern/kern_synch.c:-1 uvn_io(fffffd806d5cf660,ffff80002ebfb3a0,1,31,1) at uvn_io+0x7b5 sys/uvm/uvm_vnode.c:1310 uvn_put(fffffd806d5cf660,ffff80002ebfb3a0,1,31) at uvn_put+0x125 sys/uvm/uvm_vnode.c:922 uvm_pager_put(fffffd806d5cf660,fffffd800848e4c0,ffff80002ebfb430,ffff80002ebfb464,31,0,3998d1368c078baf) at uvm_pager_put+0x164 sys/uvm/uvm_pager.c:524 uvn_flush(fffffd806d5cf660,0,0,31) at uvn_flush+0x6aa sys/uvm/uvm_vnode.c:723 uvm_vnp_sync(ffff800000b4a800) at uvm_vnp_sync+0x1e7 sys/uvm/uvm_vnode.c:1532 sys_sync(ffff80003a44b788,0,0) at sys_sync+0xda sys/kern/vfs_syscalls.c:534 vfs_syncwait(ffff80003a44b788,1) at vfs_syncwait+0x44 sys/kern/vfs_subr.c:-1 vfs_shutdown(ffff80003a44b788) at vfs_shutdown+0x97 sys/kern/vfs_subr.c:1810 boot(100) at boot+0x16f sys/arch/amd64/amd64/machdep.c:914 reboot(100) at reboot+0xb1 panic(ffffffff833722d8) at panic+0x1f9 __assert(ffffffff833b0390,ffffffff833c03bf,3b7,ffffffff833e9810) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80002a326928,ffffffff833680a2) at refcnt_finalize+0x1db sys/kern/kern_synch.c:952 pppx_if_destroy(205b9a,ffff80002a326920) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,83,2000,ffff80003a44b788) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002ebfb890) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c7f6eb8,83,fffffd80097fb5b0,ffff80003a44b788) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80647f70f8,ffff80003a44b788) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80647f70f8,ffff80003a44b788) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80647f70f8,ffff80003a44b788) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80647f70f8,ffff80003a44b788) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003a44b788) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003a44b788,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003a44b788,ffff80002ebfbc00,ffff80002ebfbb50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ebfbc00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebfbc00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a1e1bdb5e90, count: -31