panic: vclean: deadlock Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 135450 80807 0 0x8000002 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830dea7c) at panic+0x1e5 sys/kern/subr_prf.c:198 vclean(fffffd8077dfb2a0,8,ffff800034d9d978) at vclean+0x482 sys/kern/vfs_subr.c:1065 vgonel(fffffd8077dfb2a0,ffff800034d9d978) at vgonel+0xec sys/kern/vfs_subr.c:1197 vcount(fffffd806bf80a38) at vcount+0x179 sys/kern/vfs_subr.c:1298 spec_close(ffff80002ea4b210) at spec_close+0xb8 sys/kern/spec_vnops.c:480 VOP_CLOSE(fffffd806bf80a38,3,fffffd807f7d3680,ffff800034d9d978) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c000b58,ffff800034d9d978) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c000b58,ffff800034d9d978) at vn_closefile+0x12b sys/kern/vfs_vnops.c:609 fdrop(fffffd806c000b58,ffff800034d9d978) at fdrop+0x126 sys/kern/kern_descrip.c:1274 closef(fffffd806c000b58,ffff800034d9d978) at closef+0x192 sys/kern/kern_descrip.c:1258 fdfree(ffff800034d9d978) at fdfree+0x116 sys/kern/kern_descrip.c:1190 exit1(ffff800034d9d978,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221 sys_exit(ffff800034d9d978,ffff80002ea4b590,ffff80002ea4b4e0) at sys_exit+0x1a syscall(ffff80002ea4b590) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002ea4b590) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002ea4b610, count: 0 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: vclean: deadlock ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830dea7c) at panic+0x1e5 sys/kern/subr_prf.c:198 vclean(fffffd8077dfb2a0,8,ffff800034d9d978) at vclean+0x482 sys/kern/vfs_subr.c:1065 vgonel(fffffd8077dfb2a0,ffff800034d9d978) at vgonel+0xec sys/kern/vfs_subr.c:1197 vcount(fffffd806bf80a38) at vcount+0x179 sys/kern/vfs_subr.c:1298 spec_close(ffff80002ea4b210) at spec_close+0xb8 sys/kern/spec_vnops.c:480 VOP_CLOSE(fffffd806bf80a38,3,fffffd807f7d3680,ffff800034d9d978) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c000b58,ffff800034d9d978) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c000b58,ffff800034d9d978) at vn_closefile+0x12b sys/kern/vfs_vnops.c:609 fdrop(fffffd806c000b58,ffff800034d9d978) at fdrop+0x126 sys/kern/kern_descrip.c:1274 closef(fffffd806c000b58,ffff800034d9d978) at closef+0x192 sys/kern/kern_descrip.c:1258 fdfree(ffff800034d9d978) at fdfree+0x116 sys/kern/kern_descrip.c:1190 exit1(ffff800034d9d978,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221 sys_exit(ffff800034d9d978,ffff80002ea4b590,ffff80002ea4b4e0) at sys_exit+0x1a syscall(ffff80002ea4b590) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002ea4b590) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77bf9aee3d30, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002ea4afc0 rbx 0xffff800029b7cd87 rdx 0 rcx 0xffff800034d9d978 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe0563749c69bb2d5 r11 0x6c1618ea7d9ca996 r12 0xffff800029b7cb88 r13 0 r14 0 r15 0x1 rip 0xffffffff81ff41c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002ea4afb0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=97119 pid=1307 tcnt=0 stat=onproc flags process=8001008 proc=2000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff800034d9d978 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003358b6f8,0xffff800034d9c548 process=0xffff8000ffffa890 user=0xffff80002ea46000, vmspace=0xfffffd806c532388 estcpu=33, cpticks=1, pctcpu=0.5, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 46579 30684 7148 0 2 0x8000000 syz-executor 46579 329361 7148 0 2 0xc000000 syz-executor 52870 143678 32427 0 2 0x8000002 ifconfig 37137 490882 66323 0 2 0xc081000 syz-executor 37137 166425 66323 0 3 0xc003000 suspend syz-executor 10710 312008 16436 0 2 0x8000000 syz-executor 10710 270587 16436 0 3 0xc000080 fsleep syz-executor 32427 276409 30136 0 3 0x810008a sigsusp sh 30136 35328 33591 0 3 0x8000082 wait syz-executor 22575 493894 33591 0 3 0x8000002 biowait syz-executor 16436 10274 33591 0 3 0x8000082 nanoslp syz-executor 80807 135450 33591 0 7 0x8000002 syz-executor 270 466427 33591 0 3 0x8000002 getblk syz-executor 66323 449333 33591 0 3 0x8000082 nanoslp syz-executor 94059 310399 33591 0 3 0x8000002 biowait syz-executor 7148 199915 33591 0 3 0x8000082 nanoslp syz-executor 95526 375445 1 0 3 0x18100083 ttyopn getty 79210 81017 0 0 3 0x14200 bored sosplice 47186 287200 0 0 3 0x14280 nfsidl nfsio 14243 346742 0 0 3 0x14280 nfsidl nfsio 42825 287593 0 0 3 0x14280 nfsidl nfsio 24520 244642 0 0 3 0x14280 nfsidl nfsio 12469 204717 0 0 3 0x14280 nfsidl nfsio 3607 75533 0 0 3 0x14280 nfsidl nfsio 42934 250340 0 0 3 0x14280 nfsidl nfsio 98070 305072 0 0 3 0x14280 nfsidl nfsio 82295 73901 0 0 3 0x14280 nfsidl nfsio 41465 293184 0 0 3 0x14280 nfsidl nfsio 49178 38693 0 0 3 0x14280 nfsidl nfsio 42274 386209 0 0 3 0x14280 nfsidl nfsio 55880 413812 0 0 3 0x14280 nfsidl nfsio 67960 467646 0 0 3 0x14280 nfsidl nfsio 61778 414343 0 0 3 0x14280 nfsidl nfsio 92501 269458 0 0 3 0x14280 nfsidl nfsio 79979 93300 0 0 3 0x14280 nfsidl nfsio 4785 413146 0 0 3 0x14280 nfsidl nfsio 14316 166111 0 0 3 0x14280 nfsidl nfsio 27536 364582 0 0 3 0x14280 nfsidl nfsio 33591 383536 40752 0 3 0x8000082 nanoslp syz-executor 40752 134172 81299 0 3 0x810008a sigsusp ksh 81299 389469 36425 0 3 0x18000098 kqread sshd-session 36425 507630 46780 0 3 0x18000092 kqread sshd-session 46780 424752 1 0 3 0x18000088 kqread sshd 69739 215702 77160 74 3 0x19100092 bpf pflogd 77160 237501 1 0 3 0x18000080 sbwait pflogd 78863 183055 47732 73 3 0x19100010 biowait syslogd 47732 367157 1 0 3 0x18100082 sbwait syslogd 48515 316202 1 0 3 0x18100080 kqread resolvd 46231 500750 40420 77 3 0x18100092 kqread dhcpleased 18271 76074 40420 77 3 0x18100092 kqread dhcpleased 40420 325145 1 0 3 0x18000080 kqread dhcpleased 77034 213887 0 0 3 0x14200 bored smr 58675 37207 0 0 2 0x14200 zerothread 62247 348883 0 0 3 0x14200 aiodoned aiodoned 7846 37249 0 0 3 0x14200 syncer update 70053 496108 0 0 3 0x14200 cleaner cleaner 22511 28094 0 0 3 0x14200 reaper reaper 77069 154409 0 0 3 0x14200 pgdaemon pagedaemon 16226 151808 0 0 3 0x14200 bored viomb 44038 465153 0 0 3 0x40014200 acpi0 acpi0 93255 8364 0 0 3 0x40014200 idle1 72578 282751 0 0 3 0x14200 bored softnet3 20490 23501 0 0 3 0x14200 bored softnet2 94242 345556 0 0 3 0x14200 bored softnet1 8452 255894 0 0 3 0x14200 bored softnet0 72677 456975 0 0 3 0x14200 bored systqmp 43555 149546 0 0 3 0x14200 bored systq 97228 61559 0 0 3 0x14200 tmoslp softclockmp 66547 6350 0 0 3 0x40014200 tmoslp softclock 21743 34578 0 0 3 0x40014200 idle0 1 219950 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/vfs_subr.c:119 r = 0 (0xffffffff8348b0d8) #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 vclean+0x87 sys/kern/vfs_subr.c:1051 #4 vgonel+0xec sys/kern/vfs_subr.c:1197 #5 vcount+0x179 sys/kern/vfs_subr.c:1298 #6 spec_close+0xb8 sys/kern/spec_vnops.c:480 #7 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #8 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #8 vn_closefile+0x12b sys/kern/vfs_vnops.c:609 #9 fdrop+0x126 sys/kern/kern_descrip.c:1274 #10 closef+0x192 sys/kern/kern_descrip.c:1258 #11 fdfree+0x116 sys/kern/kern_descrip.c:1190 #12 exit1+0x71b sys/kern/kern_exit.c:221 #13 sys_exit+0x1a #14 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #14 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #15 Xsyscall+0x128 Process 22575 (syz-executor) thread 0xffff800033594a58 (493894) Process 270 (syz-executor) thread 0xffff80003358a540 (466427) Process 94059 (syz-executor) thread 0xffff80003358aa50 (310399) Process 78863 (syslogd) thread 0xffff8000ffffd960 (183055) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10209 10376K 10707K 166960K 12710 0 pcb 17 14K 15K 166960K 151 0 rtable 225 6K 7K 166960K 1104 0 pf 33 9K 10K 166960K 100 0 ifaddr 43 15K 15K 166960K 119 0 ifgroup 55 2K 2K 166960K 141 0 sysctl 3 0K 1K 166960K 36 0 counters 64 36K 36K 166960K 114 0 ioctlops 0 0K 4K 166960K 1550 0 iov 0 0K 24K 166960K 50 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1460 92K 92K 166960K 2235 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 70 0 dirhash 12 2K 3K 166960K 24 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 93K 166960K 981 0 sigio 0 0K 0K 166960K 52 0 proc 77 103K 152K 166960K 963 0 subproc 104 6K 6K 166960K 286 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 119 0 in_multi 89 6K 7K 166960K 266 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 710 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 221 72K 91K 166960K 10121 0 UVM aobj 29 2K 2K 166960K 29 0 pinsyscall 41 82K 106K 166960K 2444 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 42 0 NDP 12 0K 2K 166960K 80 0 temp 76 6816K 6885K 166960K 37152 0 kqueue 13 20K 28K 166960K 151 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 120 131 0 128 1 0 1 1 0 8 0 rtentry 112 415 0 311 4 0 4 4 0 8 1 unpcb 144 808 0 789 8 6 2 4 0 8 1 syncache 336 11 0 11 3 2 1 1 0 8 1 tcpcb 808 367 0 363 10 6 4 8 0 8 3 arp 120 114 0 97 1 0 1 1 0 8 0 inpcb 336 1203 0 1195 21 17 4 18 0 8 2 nd6 136 78 0 55 2 0 2 2 0 8 1 pkpcb 40 4 0 4 2 2 0 1 0 8 0 kcovpl 48 22 0 14 1 0 1 1 0 8 0 ppxss 1168 8 0 8 3 2 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 6 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 9 0 5 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 pfstitem 24 95 0 46 1 0 1 1 0 8 0 pfstkey 128 97 0 48 3 0 3 3 0 8 0 pfstate 376 96 0 47 7 0 7 7 0 8 0 pfrule 1344 27 0 21 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1253 0 832 31 4 27 30 0 8 0 art_table 32 1254 0 832 4 0 4 4 0 8 0 art_node 16 413 0 319 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 68 0 58 1 0 1 1 0 8 0 shmpl 112 26 0 0 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2800 0 1279 96 0 96 96 0 8 0 ffsino 272 2800 0 1279 102 0 102 102 0 8 0 nchpl 144 4090 0 3519 63 39 24 63 0 8 0 uvmvnodes 80 3578 0 0 74 0 74 74 0 8 0 vnodes 216 3578 0 0 199 0 199 199 0 8 0 namei 1024 15780 0 15778 4 3 1 2 0 8 0 percpumem 16 71 0 25 1 0 1 1 0 8 0 vcpupl 3904 1 0 0 1 0 1 1 0 8 0 vmpool 696 7 0 6 1 0 1 1 0 8 0 kstatmem 264 74 0 50 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 14500 0 14497 9 8 1 8 1 8 0 plimitpl 152 423 0 405 1 0 1 1 0 8 0 sigapl 424 1286 0 1217 10 1 9 9 0 8 0 futexpl 64 14013 0 14012 2 1 1 1 0 8 0 knotepl 120 331 0 0 10 0 10 10 0 8 0 kqueuepl 216 258 0 249 2 1 1 2 0 8 0 pipepl 320 338 0 309 10 5 5 8 0 8 2 fdescpl 496 1246 0 1216 6 1 5 5 0 8 0 filepl 152 8588 0 8336 26 11 15 21 0 8 4 lockfpl 104 291 0 288 1 0 1 1 0 8 0 lockfspl 48 127 0 124 1 0 1 1 0 8 0 sessionpl 144 37 0 28 1 0 1 1 0 8 0 pgrppl 48 73 0 56 1 0 1 1 0 8 0 ucredpl 104 1324 0 1311 1 0 1 1 0 8 0 zombiepl 144 1219 0 1217 1 0 1 1 0 8 0 processpl 1152 1286 0 1217 6 0 6 6 0 8 0 procpl 648 2430 0 2357 9 1 8 8 0 8 1 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 7 0 7 3 2 1 1 0 8 1 sockpl 664 2157 0 2127 25 19 6 20 0 8 2 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 217 0 0 28 0 28 28 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 402 0 0 24 0 24 24 0 8 0 bufpl 280 5944 0 102 418 0 418 418 0 8 0 anonpl 24 227196 0 218732 83 2 81 81 0 185 4 amapchunkpl 152 31994 0 31479 42 7 35 35 0 158 11 amappl16 200 5670 0 5430 36 10 26 27 0 8 0 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 146 0 134 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 2123 0 2093 4 1 3 3 0 8 1 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 20 0 20 1 1 0 1 0 8 0 amappl9 144 142 0 142 2 2 0 1 0 8 0 amappl8 136 39 0 36 1 0 1 1 0 8 0 amappl7 128 162 0 149 1 0 1 1 0 8 0 amappl6 120 300 0 296 1 0 1 1 0 8 0 amappl5 112 207 0 194 1 0 1 1 0 8 0 amappl4 104 364 0 343 1 0 1 1 0 8 0 amappl3 96 6607 0 6507 4 0 4 4 0 8 0 amappl2 88 833 0 764 2 0 2 2 0 8 0 amappl1 80 11227 0 10639 15 2 13 15 0 8 0 amappl 88 9586 0 9427 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 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 28 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1253 0 1222 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1253 0 1222 1 0 1 1 0 8 0 vmmpekpl 168 12113 0 12057 3 0 3 3 0 8 0 vmmpepl 168 86743 0 84747 113 11 102 109 0 357 4 vmsppl 440 1252 0 1222 6 2 4 5 0 8 0 rwobjpl 56 29785 0 25012 70 2 68 68 0 8 0 pdppl 4096 2513 0 2445 125 51 74 85 0 8 6 pvpl 32 31986 0 0 260 2 258 258 0 265 0 pmappl 248 1252 0 1222 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 458 0 87 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8341fff0) 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 __mp_lock(ffffffff8356af18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8356af18) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff8000359ad550,ffff80000006bc00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8356af18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8356af18) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff8000359ad720) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000359ad720) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77bf9aee3d30, count: 6 ddb{0}> trace x86_ipi_db(ffffffff8341fff0) 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 __mp_lock(ffffffff8356af18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8356af18) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff8000359ad550,ffff80000006bc00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8356af18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8356af18) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff8000359ad720) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000359ad720) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77bf9aee3d30, 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(ffffffff830dea7c) at panic+0x1e5 sys/kern/subr_prf.c:198 vclean(fffffd8077dfb2a0,8,ffff800034d9d978) at vclean+0x482 sys/kern/vfs_subr.c:1065 vgonel(fffffd8077dfb2a0,ffff800034d9d978) at vgonel+0xec sys/kern/vfs_subr.c:1197 vcount(fffffd806bf80a38) at vcount+0x179 sys/kern/vfs_subr.c:1298 spec_close(ffff80002ea4b210) at spec_close+0xb8 sys/kern/spec_vnops.c:480 VOP_CLOSE(fffffd806bf80a38,3,fffffd807f7d3680,ffff800034d9d978) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c000b58,ffff800034d9d978) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c000b58,ffff800034d9d978) at vn_closefile+0x12b sys/kern/vfs_vnops.c:609 fdrop(fffffd806c000b58,ffff800034d9d978) at fdrop+0x126 sys/kern/kern_descrip.c:1274 closef(fffffd806c000b58,ffff800034d9d978) at closef+0x192 sys/kern/kern_descrip.c:1258 fdfree(ffff800034d9d978) at fdfree+0x116 sys/kern/kern_descrip.c:1190 exit1(ffff800034d9d978,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221 sys_exit(ffff800034d9d978,ffff80002ea4b590,ffff80002ea4b4e0) at sys_exit+0x1a syscall(ffff80002ea4b590) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002ea4b590) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002ea4b610, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830dea7c) at panic+0x1e5 sys/kern/subr_prf.c:198 vclean(fffffd8077dfb2a0,8,ffff800034d9d978) at vclean+0x482 sys/kern/vfs_subr.c:1065 vgonel(fffffd8077dfb2a0,ffff800034d9d978) at vgonel+0xec sys/kern/vfs_subr.c:1197 vcount(fffffd806bf80a38) at vcount+0x179 sys/kern/vfs_subr.c:1298 spec_close(ffff80002ea4b210) at spec_close+0xb8 sys/kern/spec_vnops.c:480 VOP_CLOSE(fffffd806bf80a38,3,fffffd807f7d3680,ffff800034d9d978) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c000b58,ffff800034d9d978) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c000b58,ffff800034d9d978) at vn_closefile+0x12b sys/kern/vfs_vnops.c:609 fdrop(fffffd806c000b58,ffff800034d9d978) at fdrop+0x126 sys/kern/kern_descrip.c:1274 closef(fffffd806c000b58,ffff800034d9d978) at closef+0x192 sys/kern/kern_descrip.c:1258 fdfree(ffff800034d9d978) at fdfree+0x116 sys/kern/kern_descrip.c:1190 exit1(ffff800034d9d978,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221 sys_exit(ffff800034d9d978,ffff80002ea4b590,ffff80002ea4b4e0) at sys_exit+0x1a syscall(ffff80002ea4b590) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002ea4b590) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77bf9aee3d30, count: -15