panic: kernel diagnostic assertion "pg->wire_count == 1" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/vfs_biomem.c", line 310 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *511379 39860 0 0 0x4000000 0K syz-executor 267460 83603 73 0x1100010 0 1 syslogd db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e3b59) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309b45c,ffffffff8303efd2,136,ffffffff8302125c) at __assert+0x29 buf_free_pages(fffffd80618e7e70) at buf_free_pages+0x23d sys/kern/vfs_biomem.c:299 buf_dealloc_mem(fffffd80618e7e70) at buf_dealloc_mem+0x14e sys/kern/vfs_biomem.c:179 buf_put(fffffd80618e7e70) at buf_put+0x1dc sys/kern/vfs_bio.c:127 brelse(fffffd80618e7e70) at brelse+0x395 sys/kern/vfs_bio.c:944 vinvalbuf(fffffd8062e10bf8,2,ffffffffffffffff,ffff8000359b56f8,0,ffffffffffffffff) at vinvalbuf+0x52c sys/kern/vfs_subr.c:2022 ffs_truncate(fffffd807a3f4998,0,0,ffffffffffffffff) at ffs_truncate+0xf6c ufs_inactive(ffff80002c18a188) at ufs_inactive+0x203 sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd8062e10bf8,ffff8000359b56f8) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vrele(fffffd8062e10bf8) at vrele+0x129 sys/kern/vfs_subr.c:824 ktrsettrace(ffff8000ffffbaf8,80000310,fffffd806b01d950,fffffd807f7d3410) at ktrsettrace+0xe7 sys/kern/kern_ktrace.c:122 ktrops(ffff8000359b56f8,ffff8000ffffbaf8,0,80000310,fffffd806b01d950,fffffd807f7d3410) at ktrops+0x271 sys/kern/kern_ktrace.c:564 end trace frame: 0xffff80002c18a3f0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "pg->wire_count == 1" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/vfs_biomem.c", line 310 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e3b59) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309b45c,ffffffff8303efd2,136,ffffffff8302125c) at __assert+0x29 buf_free_pages(fffffd80618e7e70) at buf_free_pages+0x23d sys/kern/vfs_biomem.c:299 buf_dealloc_mem(fffffd80618e7e70) at buf_dealloc_mem+0x14e sys/kern/vfs_biomem.c:179 buf_put(fffffd80618e7e70) at buf_put+0x1dc sys/kern/vfs_bio.c:127 brelse(fffffd80618e7e70) at brelse+0x395 sys/kern/vfs_bio.c:944 vinvalbuf(fffffd8062e10bf8,2,ffffffffffffffff,ffff8000359b56f8,0,ffffffffffffffff) at vinvalbuf+0x52c sys/kern/vfs_subr.c:2022 ffs_truncate(fffffd807a3f4998,0,0,ffffffffffffffff) at ffs_truncate+0xf6c ufs_inactive(ffff80002c18a188) at ufs_inactive+0x203 sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd8062e10bf8,ffff8000359b56f8) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vrele(fffffd8062e10bf8) at vrele+0x129 sys/kern/vfs_subr.c:824 ktrsettrace(ffff8000ffffbaf8,80000310,fffffd806b01d950,fffffd807f7d3410) at ktrsettrace+0xe7 sys/kern/kern_ktrace.c:122 ktrops(ffff8000359b56f8,ffff8000ffffbaf8,0,80000310,fffffd806b01d950,fffffd807f7d3410) at ktrops+0x271 sys/kern/kern_ktrace.c:564 doktrace(fffffd806b01d950,4,310,0,ffff8000359b56f8) at doktrace+0x6dd ktrsetchildren sys/kern/kern_ktrace.c:586 [inline] doktrace(fffffd806b01d950,4,310,0,ffff8000359b56f8) at doktrace+0x6dd sys/kern/kern_ktrace.c:508 sys_ktrace(ffff8000359b56f8,ffff80002c18a5f0,ffff80002c18a540) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:549 syscall(ffff80002c18a5f0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002c18a5f0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd3392afb460, count: -18 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002c189c80 rbx 0xffffffff834afdbf cpu_info_full_primary+0x2dbf rdx 0 rcx 0xffff8000359b56f8 rax 0xffffffff834aeff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb77b15e35487fe87 r11 0xcba74f15aa0d5f3f r12 0xffffffff834afbc0 cpu_info_full_primary+0x2bc0 r13 0 r14 0 r15 0x1 rip 0xffffffff817906c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002c189c70 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=511379 pid=39860 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000359b47c8,0xffff8000359b5480 process=0xffff8000371d4910 user=0xffff80002c185000, vmspace=0xfffffd806bed1370 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75031 366789 45887 0 2 0 syz-executor 75031 49327 45887 0 2 0x4000000 syz-executor 81656 229878 64572 0 2 0x100000 sh 39860 300952 32152 0 2 0 syz-executor *39860 511379 32152 0 7 0x4000000 syz-executor 64572 188045 56095 0 3 0x10008a sigsusp sh 90399 494864 1093 0 2 0x100000 sh 70857 56473 92497 0 2 0x2 arp 92497 168050 14470 0 3 0x10008a sigsusp sh 79591 106163 11859 0 2 0 syz-executor 79591 260118 11859 0 3 0x4000080 fsleep syz-executor 79591 15446 11859 0 2 0x4000000 syz-executor 23005 70546 51494 0 2 0 syz-executor 23005 174258 51494 0 3 0x4000080 fsleep syz-executor 59991 40213 48751 0 2 0 syz-executor 1093 393954 5161 0 3 0x10008a sigsusp sh 5161 53538 2268 0 3 0x82 wait syz-executor 56095 299484 2268 0 3 0x82 wait syz-executor 14470 464177 2268 0 3 0x82 wait syz-executor 11859 152389 2268 0 3 0x82 nanoslp syz-executor 51494 13305 2268 0 3 0x82 nanoslp syz-executor 48751 455551 2268 0 3 0x82 nanoslp syz-executor 32152 53357 2268 0 3 0x82 nanoslp syz-executor 45887 145316 2268 0 3 0x82 nanoslp syz-executor 15995 41066 0 0 3 0x14280 nfsidl nfsio 4107 30107 0 0 3 0x14280 nfsidl nfsio 43206 14980 0 0 3 0x14280 nfsidl nfsio 93600 28634 0 0 3 0x14280 nfsidl nfsio 99114 253913 0 0 3 0x14280 nfsidl nfsio 97103 126598 0 0 3 0x14280 nfsidl nfsio 34268 223835 0 0 3 0x14280 nfsidl nfsio 36015 79146 0 0 3 0x14280 nfsidl nfsio 85027 277654 0 0 3 0x14280 nfsidl nfsio 18041 320630 0 0 3 0x14280 nfsidl nfsio 18874 42917 0 0 3 0x14280 nfsidl nfsio 31086 98593 0 0 3 0x14280 nfsidl nfsio 2573 386702 0 0 3 0x14280 nfsidl nfsio 55436 329138 0 0 3 0x14280 nfsidl nfsio 88511 271509 0 0 3 0x14280 nfsidl nfsio 24808 207534 0 0 3 0x14280 nfsidl nfsio 23778 157304 0 0 3 0x14280 nfsidl nfsio 53331 325323 0 0 3 0x14280 nfsidl nfsio 78175 480029 0 0 3 0x14280 nfsidl nfsio 98089 123616 0 0 3 0x14280 nfsidl nfsio 48930 503052 0 0 3 0x14200 bored sosplice 2268 493694 97898 0 3 0x82 kqread syz-executor 97898 459557 88879 0 3 0x10008a sigsusp ksh 88879 135615 76868 0 3 0x98 kqread sshd-session 76868 204161 7295 0 3 0x92 kqread sshd-session 45105 53205 1 0 3 0x100083 ttyin getty 7295 261120 1 0 3 0x88 kqread sshd 84174 142707 63833 74 3 0x1100092 bpf pflogd 63833 201046 1 0 3 0x80 sbwait pflogd 83603 267460 74047 73 7 0x1100010 syslogd 74047 457768 1 0 3 0x100082 sbwait syslogd 82877 477497 1 0 3 0x100080 kqread resolvd 59163 93804 93953 77 3 0x100092 kqread dhcpleased 57463 220293 93953 77 3 0x100092 kqread dhcpleased 93953 462736 1 0 3 0x80 kqread dhcpleased 25299 127939 0 0 3 0x14200 bored smr 40662 26866 0 0 2 0x14200 zerothread 57007 145235 0 0 3 0x14200 aiodoned aiodoned 8681 215393 0 0 3 0x14200 syncer update 31724 432081 0 0 3 0x14200 cleaner cleaner 62900 50934 0 0 3 0x14200 reaper reaper 31650 386689 0 0 3 0x14200 pgdaemon pagedaemon 45843 266853 0 0 3 0x14200 bored viomb 66606 397303 0 0 3 0x40014200 acpi0 acpi0 57398 110873 0 0 3 0x40014200 idle1 28754 292334 0 0 3 0x14200 bored softnet3 95095 277072 0 0 3 0x14200 bored softnet2 78407 145883 0 0 3 0x14200 bored softnet1 78762 349488 0 0 3 0x14200 bored softnet0 66238 457758 0 0 3 0x14200 bored systqmp 9953 436911 0 0 3 0x14200 bored systq 68966 140953 0 0 3 0x14200 tmoslp softclockmp 1913 381791 0 0 3 0x40014200 tmoslp softclock 90499 294020 0 0 3 0x40014200 idle0 1 441793 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 39860 (syz-executor) thread 0xffff8000359b56f8 (511379) Process 83603 (syslogd) thread 0xffff8000ffffdbe8 (267460) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 11125K 11456K 166960K 12728 0 pcb 17 17K 18K 166960K 201 0 rtable 167 6K 8K 166960K 2449 0 pf 37 18K 18K 166960K 221 0 ifaddr 37 6K 8K 166960K 342 0 ifgroup 60 2K 2K 166960K 379 0 sysctl 3 0K 1K 166960K 4 0 counters 66 36K 37K 166960K 238 0 ioctlops 0 0K 4K 166960K 1603 0 iov 0 0K 28K 166960K 91 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1513 95K 95K 166960K 2884 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 35 0 dirhash 15 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 21 77K 89K 166960K 2090 0 sigio 0 0K 0K 166960K 21 0 proc 72 91K 128K 166960K 2470 0 subproc 104 6K 8K 166960K 988 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 150 0 in_multi 68 5K 7K 166960K 875 0 ether_multi 1 0K 0K 166960K 13 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 1314 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 231 73K 113K 166960K 16855 0 UVM aobj 31 4K 4K 166960K 35 0 pinsyscall 46 92K 102K 166960K 4891 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 64 0 NDP 13 0K 2K 166960K 248 0 temp 72 6823K 6901K 166960K 106584 0 kqueue 13 20K 34K 166960K 175 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 391 0 388 3 2 1 3 0 8 0 rtentry 112 867 0 795 4 1 3 4 0 8 0 unpcb 144 945 0 924 17 16 1 6 0 8 0 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 808 348 0 344 8 7 1 4 0 8 0 arp 120 158 0 143 1 0 1 1 0 8 0 inpcb 336 1549 0 1540 30 28 2 12 0 8 1 nd6 136 227 0 212 1 0 1 1 0 8 0 pkpcb 40 7 0 7 3 3 0 1 0 8 0 kcovpl 48 76 0 68 1 0 1 1 0 8 0 ppxss 1168 13 0 13 8 8 0 1 0 8 0 pffrag 232 9 0 6 1 0 1 1 0 482 0 pffrnode 88 9 0 6 1 0 1 1 0 8 0 pffrent 40 60 0 57 2 1 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 24 182 0 161 1 0 1 1 0 8 0 pfstkey 128 182 0 161 2 0 2 2 0 8 0 pfstate 376 182 0 161 5 1 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 3493 0 3169 43 15 28 31 0 8 2 art_table 32 3495 0 3169 5 1 4 4 0 8 0 art_node 16 864 0 799 1 0 1 1 0 8 0 sysvmsgpl 40 143 0 138 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 32 0 4 1 0 1 1 0 8 0 dirhash 1024 31 0 12 3 0 3 3 0 8 0 dino2pl 256 3354 0 1717 103 0 103 103 0 8 0 ffsino 272 3354 0 1717 110 0 110 110 0 8 0 nchpl 144 4917 0 3149 66 0 66 66 0 8 0 uvmvnodes 80 4710 0 0 97 0 97 97 0 8 0 vnodes 216 4710 0 0 262 0 262 262 0 8 0 namei 1024 22952 0 22952 8 7 1 2 0 8 1 percpumem 16 133 0 86 1 0 1 1 0 8 0 kstatmem 264 198 0 172 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 44028 0 44028 19 18 1 8 1 8 1 plimitpl 152 359 0 342 1 0 1 1 0 8 0 sigapl 424 2276 0 2202 9 0 9 9 0 8 0 futexpl 64 16976 0 16974 6 5 1 1 0 8 0 knotepl 120 500 0 0 16 0 16 16 0 8 0 kqueuepl 216 288 0 279 1 0 1 1 0 8 0 pipepl 320 457 0 430 9 6 3 6 0 8 0 fdescpl 496 2235 0 2200 11 6 5 5 0 8 0 filepl 152 11192 0 10951 39 28 11 21 0 8 0 lockfpl 104 357 0 355 1 0 1 1 0 8 0 lockfspl 48 150 0 148 1 0 1 1 0 8 0 sessionpl 144 91 0 82 1 0 1 1 0 8 0 pgrppl 48 177 0 160 1 0 1 1 0 8 0 ucredpl 104 1671 0 1657 1 0 1 1 0 8 0 zombiepl 144 2202 0 2202 2 1 1 1 0 8 1 processpl 1160 2276 0 2202 6 0 6 6 0 8 0 procpl 648 3842 0 3763 9 1 8 8 0 8 0 srpgc 96 9 0 9 4 4 0 1 0 8 0 sosppl 168 9 0 9 5 5 0 1 0 8 0 sockpl 664 2905 0 2872 52 48 4 20 0 8 0 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 164 0 0 19 1 18 19 0 8 0 mcl2k 2048 43 0 0 4 0 4 4 0 8 0 mtagpl 96 68 0 0 2 0 2 2 0 8 0 mbufpl 256 1303 0 0 80 0 80 80 0 8 0 bufpl 280 11827 0 2380 675 0 675 675 0 8 0 anonpl 24 382730 0 374490 167 88 79 84 0 185 8 amapchunkpl 152 54242 0 53694 67 36 31 39 0 158 9 amappl16 200 8034 0 7823 71 53 18 26 0 8 0 amappl15 192 40 0 40 1 1 0 1 0 8 0 amappl14 184 246 0 234 1 0 1 1 0 8 0 amappl13 176 16 0 16 1 1 0 1 0 8 0 amappl12 168 3931 0 3893 3 1 2 2 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 37 0 37 1 1 0 1 0 8 0 amappl9 144 153 0 153 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 241 0 229 1 0 1 1 0 8 0 amappl6 120 832 0 828 1 0 1 1 0 8 0 amappl5 112 406 0 392 1 0 1 1 0 8 0 amappl4 104 509 0 488 1 0 1 1 0 8 0 amappl3 96 10270 0 10172 4 0 4 4 0 8 0 amappl2 88 1608 0 1532 2 0 2 2 0 8 0 amappl1 80 17554 0 16979 14 1 13 14 0 8 0 amappl 88 15920 0 15751 5 0 5 5 0 92 0 dma32768 32768 2 0 2 1 1 0 1 0 8 0 dma16384 16384 2 0 2 1 1 0 1 0 8 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 34 0 4 1 0 1 1 0 8 0 uaddrrnd 24 2235 0 2200 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2235 0 2200 1 0 1 1 0 8 0 vmmpekpl 168 18999 0 18949 4 1 3 4 0 8 0 vmmpepl 168 147761 0 145710 139 41 98 104 0 357 2 vmsppl 440 2234 0 2200 6 2 4 5 0 8 0 rwobjpl 56 47208 0 41330 93 9 84 84 0 8 0 pdppl 4096 4477 0 4400 208 131 77 83 0 8 0 pvpl 32 44323 0 0 358 0 358 358 0 265 0 pmappl 248 2234 0 2200 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 636 0 203 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e3b59) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309b45c,ffffffff8303efd2,136,ffffffff8302125c) at __assert+0x29 buf_free_pages(fffffd80618e7e70) at buf_free_pages+0x23d sys/kern/vfs_biomem.c:299 buf_dealloc_mem(fffffd80618e7e70) at buf_dealloc_mem+0x14e sys/kern/vfs_biomem.c:179 buf_put(fffffd80618e7e70) at buf_put+0x1dc sys/kern/vfs_bio.c:127 brelse(fffffd80618e7e70) at brelse+0x395 sys/kern/vfs_bio.c:944 vinvalbuf(fffffd8062e10bf8,2,ffffffffffffffff,ffff8000359b56f8,0,ffffffffffffffff) at vinvalbuf+0x52c sys/kern/vfs_subr.c:2022 ffs_truncate(fffffd807a3f4998,0,0,ffffffffffffffff) at ffs_truncate+0xf6c ufs_inactive(ffff80002c18a188) at ufs_inactive+0x203 sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd8062e10bf8,ffff8000359b56f8) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vrele(fffffd8062e10bf8) at vrele+0x129 sys/kern/vfs_subr.c:824 ktrsettrace(ffff8000ffffbaf8,80000310,fffffd806b01d950,fffffd807f7d3410) at ktrsettrace+0xe7 sys/kern/kern_ktrace.c:122 ktrops(ffff8000359b56f8,ffff8000ffffbaf8,0,80000310,fffffd806b01d950,fffffd807f7d3410) at ktrops+0x271 sys/kern/kern_ktrace.c:564 doktrace(fffffd806b01d950,4,310,0,ffff8000359b56f8) at doktrace+0x6dd ktrsetchildren sys/kern/kern_ktrace.c:586 [inline] doktrace(fffffd806b01d950,4,310,0,ffff8000359b56f8) at doktrace+0x6dd sys/kern/kern_ktrace.c:508 sys_ktrace(ffff8000359b56f8,ffff80002c18a5f0,ffff80002c18a540) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:549 syscall(ffff80002c18a5f0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002c18a5f0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd3392afb460, count: -18 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) 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(ffffffff834ff768) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834ff768) at __mp_lock+0x199 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff834ff768,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x21e sys/kern/kern_synch.c:416 biowait(fffffd807121e8d0) at biowait+0xc1 sys/kern/vfs_bio.c:1254 bwrite(fffffd807121e8d0) at bwrite+0x2e2 sys/kern/vfs_bio.c:766 ffs_update(fffffd806e40f118,1) at ffs_update+0x34c sys/ufs/ffs/ffs_inode.c:111 VOP_FSYNC(fffffd806e1b9710,fffffd807f7d3820,1,ffff8000ffffdbe8) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffffdbe8,ffff80002a06a100,ffff80002a06a050) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2926 syscall(ffff80002a06a100) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a100) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72c2819552d0, count: 1 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) 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(ffffffff834ff768) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834ff768) at __mp_lock+0x199 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff834ff768,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x21e sys/kern/kern_synch.c:416 biowait(fffffd807121e8d0) at biowait+0xc1 sys/kern/vfs_bio.c:1254 bwrite(fffffd807121e8d0) at bwrite+0x2e2 sys/kern/vfs_bio.c:766 ffs_update(fffffd806e40f118,1) at ffs_update+0x34c sys/ufs/ffs/ffs_inode.c:111 VOP_FSYNC(fffffd806e1b9710,fffffd807f7d3820,1,ffff8000ffffdbe8) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffffdbe8,ffff80002a06a100,ffff80002a06a050) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2926 syscall(ffff80002a06a100) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a100) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72c2819552d0, count: -14