panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 1078 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *462956 56727 0 0x2 0 0K ifconfig 349548 21593 73 0x1100010 0 1 syslogd db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e8af0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309c53b,ffffffff830187ec,436,ffffffff8300f546) at __assert+0x29 rtrequest(1,ffff80002e398398,4,ffff80002e398440,0) at rtrequest+0xdce sys/net/route.c:1078 rt_ifa_add(ffff8000015c9b00,840100,ffff8000015c9b58,0) at rt_ifa_add+0x22e sys/net/route.c:1273 in_ifinit(ffff80000158e800,ffff8000015c9b00,ffff80002e3986b0,1) at in_ifinit+0x4bd in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff80000158e800,ffff8000015c9b00,ffff80002e3986b0,1) at in_ifinit+0x4bd sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80002e3986a0,ffff80000158e800) at in_ioctl_change_ifaddr+0x92c sys/netinet/in.c:504 ifioctl(ffff800001588fa0,8040691a,ffff80002e3986a0,ffff8000ffff2530) at ifioctl+0x1571 pru_control sys/sys/protosw.h:355 [inline] ifioctl(ffff800001588fa0,8040691a,ffff80002e3986a0,ffff8000ffff2530) at ifioctl+0x1571 sys/net/if.c:2449 sys_ioctl(ffff8000ffff2530,ffff80002e398880,ffff80002e3987d0) at sys_ioctl+0x67c syscall(ffff80002e398880) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002e398880) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x795d9a310b80, count: 4 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 "cifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 1078 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e8af0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309c53b,ffffffff830187ec,436,ffffffff8300f546) at __assert+0x29 rtrequest(1,ffff80002e398398,4,ffff80002e398440,0) at rtrequest+0xdce sys/net/route.c:1078 rt_ifa_add(ffff8000015c9b00,840100,ffff8000015c9b58,0) at rt_ifa_add+0x22e sys/net/route.c:1273 in_ifinit(ffff80000158e800,ffff8000015c9b00,ffff80002e3986b0,1) at in_ifinit+0x4bd in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff80000158e800,ffff8000015c9b00,ffff80002e3986b0,1) at in_ifinit+0x4bd sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80002e3986a0,ffff80000158e800) at in_ioctl_change_ifaddr+0x92c sys/netinet/in.c:504 ifioctl(ffff800001588fa0,8040691a,ffff80002e3986a0,ffff8000ffff2530) at ifioctl+0x1571 pru_control sys/sys/protosw.h:355 [inline] ifioctl(ffff800001588fa0,8040691a,ffff80002e3986a0,ffff8000ffff2530) at ifioctl+0x1571 sys/net/if.c:2449 sys_ioctl(ffff8000ffff2530,ffff80002e398880,ffff80002e3987d0) at sys_ioctl+0x67c syscall(ffff80002e398880) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002e398880) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x795d9a310b80, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e398190 rbx 0xffffffff83411dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff8000ffff2530 rax 0xffffffff83410ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3aa87ef47bb6005e r11 0x62863b6aecf96470 r12 0xffffffff83411bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff82a8df55 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002e398180 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (ifconfig) tid=462956 pid=56727 tcnt=1 stat=onproc flags process=2 proc=0 runpri=78, usrpri=78, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff2a40,0xffff8000ffff22b8 process=0xffff8000fffec4a8 user=0xffff80002e393000, vmspace=0xfffffd806bb18370 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 60283 276735 83822 0 2 0x100000 sh *56727 462956 33288 0 7 0x2 ifconfig 61701 212220 75141 0 2 0x100000 sh 75141 13843 5380 0 3 0x10008a sigsusp sh 33288 155136 89963 0 3 0x10008a sigsusp sh 83822 13984 63251 0 3 0x10008a sigsusp sh 63251 523823 50107 0 3 0x82 wait syz-executor 5380 421525 50107 0 3 0x82 wait syz-executor 89963 145046 50107 0 3 0x82 wait syz-executor 27598 267751 0 0 3 0x14280 nfsidl nfsio 73049 116760 0 0 3 0x14280 nfsidl nfsio 4190 317089 0 0 3 0x14280 nfsidl nfsio 62949 484289 0 0 3 0x14280 nfsidl nfsio 27630 418293 0 0 3 0x14280 nfsidl nfsio 6265 119785 0 0 3 0x14280 nfsidl nfsio 85643 409989 0 0 3 0x14280 nfsidl nfsio 63759 123092 0 0 3 0x14280 nfsidl nfsio 86171 312155 0 0 3 0x14280 nfsidl nfsio 31190 17833 0 0 3 0x14280 nfsidl nfsio 47023 338328 0 0 3 0x14280 nfsidl nfsio 24618 115650 0 0 3 0x14280 nfsidl nfsio 71153 523644 0 0 3 0x14280 nfsidl nfsio 51072 64174 0 0 3 0x14280 nfsidl nfsio 34175 167375 0 0 3 0x14280 nfsidl nfsio 32578 329578 0 0 3 0x14280 nfsidl nfsio 99210 236125 0 0 3 0x14280 nfsidl nfsio 24972 329483 0 0 3 0x14280 nfsidl nfsio 84128 15633 0 0 3 0x14280 nfsidl nfsio 47750 223774 0 0 3 0x14280 nfsidl nfsio 5487 262289 50107 0 3 0x82 piperd syz-executor 5646 349636 50107 0 3 0x82 piperd syz-executor 84852 189808 50107 0 3 0x82 piperd syz-executor 45178 517626 50107 0 3 0x82 piperd syz-executor 73949 111393 0 0 3 0x14200 acct acct 21807 417698 0 0 3 0x14200 bored sosplice 50107 462694 75426 0 3 0x82 wait syz-executor 75426 378076 79987 0 3 0x10008a sigsusp ksh 79987 154393 16045 0 3 0x98 kqread sshd-session 16045 360827 52339 0 3 0x92 kqread sshd-session 47044 172912 1 0 3 0x100083 ttyin getty 52339 462076 1 0 3 0x88 kqread sshd 47789 16328 43298 74 3 0x1100092 bpf pflogd 43298 474951 1 0 3 0x80 sbwait pflogd 21593 349548 673 73 7 0x1100010 syslogd 673 406136 1 0 3 0x100082 sbwait syslogd 96534 184514 1 0 3 0x100080 kqread resolvd 191 314564 42842 77 3 0x100092 kqread dhcpleased 68344 72018 42842 77 3 0x100092 kqread dhcpleased 42842 103154 1 0 3 0x80 kqread dhcpleased 89900 129145 0 0 3 0x14200 bored smr 57932 400162 0 0 2 0x14200 zerothread 34552 377986 0 0 3 0x14200 aiodoned aiodoned 79709 58424 0 0 3 0x14200 syncer update 41829 509879 0 0 3 0x14200 cleaner cleaner 73699 88121 0 0 3 0x14200 reaper reaper 98654 246975 0 0 3 0x14200 pgdaemon pagedaemon 85692 500284 0 0 3 0x14200 bored viomb 891 334710 0 0 3 0x40014200 acpi0 acpi0 37973 381579 0 0 3 0x40014200 idle1 81610 169497 0 0 3 0x14200 bored softnet3 1899 425370 0 0 3 0x14200 bored softnet2 3390 116679 0 0 3 0x14200 bored softnet1 53434 491245 0 0 3 0x14200 bored softnet0 60077 107769 0 0 3 0x14200 bored systqmp 56387 66559 0 0 3 0x14200 bored systq 35467 147485 0 0 3 0x14200 tmoslp softclockmp 73135 512871 0 0 3 0x40014200 tmoslp softclock 63385 430719 0 0 3 0x40014200 idle0 1 321776 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 56727 (ifconfig) thread 0xffff8000ffff2530 (462956) exclusive rwlock netlock r = 0 (0xffffffff83489fd0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 in_ioctl_change_ifaddr+0xbe sys/netinet/in.c:413 #2 ifioctl+0x1571 pru_control sys/sys/protosw.h:355 [inline] #2 ifioctl+0x1571 sys/net/if.c:2449 #3 sys_ioctl+0x67c #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff834ffc38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 ifioctl+0x47f sys/net/if.c:2096 #2 sys_ioctl+0x67c #3 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #3 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 Process 21593 (syslogd) thread 0xffff8000ffffd960 (349548) exclusive rrwlock inode r = 0 (0xfffffd806e1692c0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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:2926 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10202 14259K 14595K 166960K 11875 0 pcb 17 12K 12K 166960K 78 0 rtable 186 8K 9K 166960K 1417 0 pf 40 19K 22K 166960K 147 0 ifaddr 37 6K 8K 166960K 185 0 ifgroup 58 2K 2K 166960K 200 0 sysctl 4 1K 1K 166960K 4 0 counters 64 36K 36K 166960K 138 0 ioctlops 0 0K 4K 166960K 1593 0 iov 0 0K 16K 166960K 42 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1375 86K 87K 166960K 2241 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 16 57K 93K 166960K 1100 0 sigio 0 0K 0K 166960K 24 0 proc 79 103K 128K 166960K 1478 0 subproc 104 6K 6K 166960K 546 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 54 0 in_multi 68 5K 7K 166960K 461 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 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 840 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 192 72K 92K 166960K 9693 0 UVM aobj 14 2K 2K 166960K 15 0 pinsyscall 41 82K 106K 166960K 3003 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 22 0 NDP 12 0K 1K 166960K 127 0 temp 57 6819K 6897K 166960K 27870 0 kqueue 13 20K 28K 166960K 108 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 120 133 0 130 1 0 1 1 0 8 0 rtentry 112 480 0 401 4 0 4 4 0 8 0 unpcb 144 530 0 513 5 4 1 4 0 8 0 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 808 187 0 183 6 5 1 4 0 8 0 arp 120 85 0 69 1 0 1 1 0 8 0 inpcb 336 698 0 689 11 9 2 5 0 8 0 nd6 136 119 0 104 1 0 1 1 0 8 0 pkpcb 40 4 0 4 3 3 0 1 0 8 0 kcovpl 48 42 0 34 1 0 1 1 0 8 0 ppxss 1168 3 0 3 2 2 0 1 0 8 0 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 9 0 3 1 0 1 1 0 482 0 pffrnode 88 9 0 3 1 0 1 1 0 8 0 pffrent 40 57 0 51 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 pfrktable 1344 3 0 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 94 0 53 1 0 1 1 0 8 0 pfstkey 128 102 0 63 2 0 2 2 0 8 0 pfstate 376 96 0 57 6 0 6 6 0 8 0 pfrule 1344 61 0 51 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1909 0 1588 34 6 28 29 0 8 2 art_table 32 1911 0 1588 4 0 4 4 0 8 0 art_node 16 474 0 406 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 5 1 0 1 1 0 8 0 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2551 0 979 99 0 99 99 0 8 0 ffsino 272 2551 0 979 106 0 106 106 0 8 0 nchpl 144 3456 0 1735 65 0 65 65 0 8 0 uvmvnodes 80 3325 0 0 68 0 68 68 0 8 0 vnodes 216 3325 0 0 185 0 185 185 0 8 0 namei 1024 14289 0 14289 5 4 1 2 0 8 1 percpumem 16 83 0 37 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 98 0 74 2 0 2 2 0 8 0 scxspl 216 24809 0 24809 10 9 1 8 1 8 1 plimitpl 152 230 0 213 1 0 1 1 0 8 0 sigapl 424 1352 0 1282 10 1 9 9 0 8 1 futexpl 64 7602 0 7602 4 4 0 1 0 8 0 knotepl 120 420 0 0 13 0 13 13 0 8 0 kqueuepl 216 168 0 159 2 1 1 2 0 8 0 pipepl 320 270 0 243 3 0 3 3 0 8 0 fdescpl 496 1312 0 1282 8 4 4 5 0 8 0 filepl 152 5976 0 5738 23 13 10 14 0 8 0 lockfpl 104 213 0 211 1 0 1 1 0 8 0 lockfspl 48 87 0 85 1 0 1 1 0 8 0 sessionpl 144 56 0 47 1 0 1 1 0 8 0 pgrppl 48 104 0 87 1 0 1 1 0 8 0 ucredpl 104 874 0 861 1 0 1 1 0 8 0 zombiepl 144 1283 0 1282 1 0 1 1 0 8 0 processpl 1160 1352 0 1282 7 1 6 6 0 8 1 procpl 648 2148 0 2078 8 0 8 8 0 8 1 srpgc 96 12 0 12 2 2 0 1 0 8 0 sosppl 168 2 0 2 2 2 0 1 0 8 0 sockpl 664 1371 0 1343 16 13 3 9 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 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 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 233 0 0 30 0 30 30 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 556 0 0 33 0 33 33 0 8 0 bufpl 280 6824 0 650 442 0 442 442 0 8 0 anonpl 24 250520 0 246502 85 28 57 80 0 185 21 amapchunkpl 152 31183 0 30792 39 4 35 35 0 158 15 amappl16 200 5251 0 5235 33 30 3 19 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 174 0 162 1 0 1 1 0 8 0 amappl13 176 21 0 21 1 1 0 1 0 8 0 amappl12 168 2466 0 2433 4 2 2 3 0 8 0 amappl11 160 71 0 57 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 150 0 150 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 165 0 153 1 0 1 1 0 8 0 amappl6 120 493 0 487 1 0 1 1 0 8 0 amappl5 112 266 0 253 1 0 1 1 0 8 0 amappl4 104 394 0 373 1 0 1 1 0 8 0 amappl3 96 5943 0 5867 6 3 3 4 0 8 0 amappl2 88 1114 0 1041 2 0 2 2 0 8 0 amappl1 80 12208 0 11640 15 2 13 14 0 8 0 amappl 88 9062 0 8932 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 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1312 0 1282 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1312 0 1282 1 0 1 1 0 8 0 vmmpekpl 168 12066 0 12005 5 1 4 4 0 8 0 vmmpepl 168 87267 0 85651 105 20 85 96 0 357 2 vmsppl 440 1311 0 1282 6 2 4 5 0 8 0 rwobjpl 56 30617 0 26369 62 2 60 60 0 8 0 pdppl 4096 2631 0 2564 139 68 71 85 0 8 4 pvpl 32 32399 0 0 265 3 262 263 0 265 0 pmappl 248 1311 0 1282 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 479 0 98 12 1 11 12 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(ffffffff830e8af0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309c53b,ffffffff830187ec,436,ffffffff8300f546) at __assert+0x29 rtrequest(1,ffff80002e398398,4,ffff80002e398440,0) at rtrequest+0xdce sys/net/route.c:1078 rt_ifa_add(ffff8000015c9b00,840100,ffff8000015c9b58,0) at rt_ifa_add+0x22e sys/net/route.c:1273 in_ifinit(ffff80000158e800,ffff8000015c9b00,ffff80002e3986b0,1) at in_ifinit+0x4bd in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff80000158e800,ffff8000015c9b00,ffff80002e3986b0,1) at in_ifinit+0x4bd sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80002e3986a0,ffff80000158e800) at in_ioctl_change_ifaddr+0x92c sys/netinet/in.c:504 ifioctl(ffff800001588fa0,8040691a,ffff80002e3986a0,ffff8000ffff2530) at ifioctl+0x1571 pru_control sys/sys/protosw.h:355 [inline] ifioctl(ffff800001588fa0,8040691a,ffff80002e3986a0,ffff8000ffff2530) at ifioctl+0x1571 sys/net/if.c:2449 sys_ioctl(ffff8000ffff2530,ffff80002e398880,ffff80002e3987d0) at sys_ioctl+0x67c syscall(ffff80002e398880) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002e398880) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x795d9a310b80, count: -11 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(ffffffff834ffa30) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834ffa30) at __mp_lock+0x199 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff834ffa30,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460 sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416 biowait(fffffd807d27f6a0) at biowait+0xc1 sys/kern/vfs_bio.c:1254 bwrite(fffffd807d27f6a0) at bwrite+0x2e2 sys/kern/vfs_bio.c:766 ffs_update(fffffd806e169228,1) at ffs_update+0x34c sys/ufs/ffs/ffs_inode.c:111 VOP_FSYNC(fffffd806df1c710,fffffd807f7d3c30,1,ffff8000ffffd960) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffffd960,ffff80002a06ad30,ffff80002a06ac80) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2926 syscall(ffff80002a06ad30) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06ad30) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e9fe833a7f0, 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(ffffffff834ffa30) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834ffa30) at __mp_lock+0x199 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff834ffa30,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460 sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416 biowait(fffffd807d27f6a0) at biowait+0xc1 sys/kern/vfs_bio.c:1254 bwrite(fffffd807d27f6a0) at bwrite+0x2e2 sys/kern/vfs_bio.c:766 ffs_update(fffffd806e169228,1) at ffs_update+0x34c sys/ufs/ffs/ffs_inode.c:111 VOP_FSYNC(fffffd806df1c710,fffffd807f7d3c30,1,ffff8000ffffd960) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffffd960,ffff80002a06ad30,ffff80002a06ac80) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2926 syscall(ffff80002a06ad30) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06ad30) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e9fe833a7f0, count: -14