uvm_fault(0xfffffd80089f6000, 0x4, 0, 1) -> e kernel: page fault trap, code=0 Stopped at igmp_leavegroup+0xaf: movl 0x4(%rax),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND 169355 24823 0 0x2 0x4000000 0 syz-fuzzer igmp_leavegroup(ffff800000cc7c80,ffff8000006b8000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cc7c80) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff8000006c8c20) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd806f5328a0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd806eefd7a8) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd806eefd7a8,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd806eefd7a8,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd806ba3c310,ffff800021224848) at soo_close+0x44 fdrop(fffffd806ba3c310,ffff800021224848) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806ba3c310,ffff800021224848) at closef+0x120 sys/kern/kern_descrip.c:1258 fdfree(ffff800021224848) at fdfree+0xf4 sys/kern/kern_descrip.c:1190 exit1(ffff800021224848,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:197 sys_exit(ffff800021224848,ffff80002837b540,ffff80002837b590) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002837b610) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002837b610) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d7414bdd3b0, count: 1 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: uvm_fault(0xfffffd80089f6000, 0x4, 0, 1) -> e ddb{1}> trace igmp_leavegroup(ffff800000cc7c80,ffff8000006b8000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cc7c80) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff8000006c8c20) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd806f5328a0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd806eefd7a8) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd806eefd7a8,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd806eefd7a8,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd806ba3c310,ffff800021224848) at soo_close+0x44 fdrop(fffffd806ba3c310,ffff800021224848) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806ba3c310,ffff800021224848) at closef+0x120 sys/kern/kern_descrip.c:1258 fdfree(ffff800021224848) at fdfree+0xf4 sys/kern/kern_descrip.c:1190 exit1(ffff800021224848,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:197 sys_exit(ffff800021224848,ffff80002837b540,ffff80002837b590) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002837b610) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002837b610) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d7414bdd3b0, count: -14 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002837b1d0 rbx 0x5 rdx 0 rcx 0x1 rax 0 r8 0 r9 0x1 r10 0x5350b6b1aad3e868 r11 0xe12f40732e039111 r12 0 r13 0x3 r14 0xffff800000cc7c80 r15 0xffff8000006b8000 rip 0xffffffff816b4a8f igmp_leavegroup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002837b1a0 ss 0x10 igmp_leavegroup+0xaf: movl 0x4(%rax),%r12d ddb{1}> show proc PROC (syz-executor.3) pid=313385 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021292e08,0xffff80002128dbd0 process=0xffff800024760cb0 user=0xffff800028376000, vmspace=0xfffffd80089f6000 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19081 499242 4237 0 2 0 syz-executor.0 32729 227112 39930 0 2 0 syz-executor.1 74167 507886 27156 0 2 0 syz-executor.4 74167 320446 27156 0 3 0x4000080 fsleep syz-executor.4 74167 212126 27156 0 3 0x4000080 fsleep syz-executor.4 39930 105791 24823 0 3 0x82 nanoslp syz-executor.1 95667 399505 24823 0 2 0x2 syz-executor.6 27156 385773 24823 0 3 0x82 nanoslp syz-executor.4 7369 488881 24823 0 3 0x2 biowait syz-executor.7 21209 355244 0 0 3 0x14200 acct acct 4237 206726 24823 0 3 0x82 nanoslp syz-executor.0 65806 20905 0 0 3 0x14280 nfsidl nfsio 38187 209687 0 0 3 0x14280 nfsidl nfsio 60949 190250 0 0 3 0x14280 nfsidl nfsio 25790 298510 0 0 3 0x14280 nfsidl nfsio 31280 172256 0 0 3 0x14280 nfsidl nfsio 61183 374385 0 0 3 0x14280 nfsidl nfsio 73256 404701 0 0 3 0x14280 nfsidl nfsio 89051 463441 0 0 3 0x14280 nfsidl nfsio 72543 458018 0 0 3 0x14280 nfsidl nfsio 99760 365824 0 0 3 0x14280 nfsidl nfsio 12199 15344 0 0 3 0x14280 nfsidl nfsio 67885 254780 0 0 3 0x14280 nfsidl nfsio 70452 82188 0 0 3 0x14280 nfsidl nfsio 87973 384490 0 0 3 0x14280 nfsidl nfsio 84717 123028 0 0 3 0x14280 nfsidl nfsio 59377 383843 0 0 3 0x14280 nfsidl nfsio 17686 235723 0 0 3 0x14280 nfsidl nfsio 40185 417595 0 0 3 0x14280 nfsidl nfsio 25923 207877 0 0 3 0x14280 nfsidl nfsio 85445 290588 0 0 3 0x14280 nfsidl nfsio 38815 41923 24823 0 2 0x2 syz-executor.2 25800 408534 24823 0 3 0x82 nanoslp syz-executor.3 35641 376655 1 0 3 0x100083 ttyin getty 15599 119975 0 0 3 0x14200 bored sosplice 24823 302354 33726 0 3 0x82 wait syz-fuzzer 24823 178183 33726 0 3 0x4000082 nanoslp syz-fuzzer 24823 480553 33726 0 3 0x4000082 wait syz-fuzzer 24823 33657 33726 0 3 0x4000082 thrsleep syz-fuzzer 24823 99907 33726 0 3 0x4000082 thrsleep syz-fuzzer 24823 184345 33726 0 3 0x4000082 thrsleep syz-fuzzer 24823 305279 33726 0 3 0x4000082 wait syz-fuzzer 24823 216017 33726 0 2 0x4000002 syz-fuzzer 24823 395843 33726 0 3 0x4000082 wait syz-fuzzer 24823 321880 33726 0 3 0x4000082 wait syz-fuzzer 24823 183984 33726 0 3 0x4000082 thrsleep syz-fuzzer 24823 452850 33726 0 3 0x4000082 thrsleep syz-fuzzer 24823 66508 33726 0 3 0x4000082 wait syz-fuzzer 24823 151926 33726 0 3 0x4000082 thrsleep syz-fuzzer 24823 255032 33726 0 3 0x4000082 wait syz-fuzzer 24823 169355 33726 0 7 0x4000002 syz-fuzzer 33726 425978 55333 0 3 0x10008a sigsusp ksh 55333 339530 81406 0 3 0x9a kqread sshd 81406 350548 1 0 3 0x88 kqread sshd 80594 328256 75813 74 3 0x1100092 bpf pflogd 75813 199574 1 0 3 0x80 netio pflogd 63976 383140 51663 73 3 0x1100090 kqread syslogd 51663 350140 1 0 3 0x100082 netio syslogd 49110 268187 1 0 3 0x100080 kqread resolvd 97852 179345 37143 77 3 0x100092 kqread dhcpleased 43047 263763 37143 77 3 0x100092 kqread dhcpleased 37143 268491 1 0 3 0x80 kqread dhcpleased 88288 301478 0 0 3 0x14200 bored smr 11357 364096 0 0 2 0x14200 zerothread 17627 24078 0 0 3 0x14200 aiodoned aiodoned 91350 72931 0 0 3 0x14200 syncer update 59247 356751 0 0 3 0x14200 cleaner cleaner 4143 59979 0 0 3 0x14200 reaper reaper 85761 425286 0 0 3 0x14200 pgdaemon pagedaemon 94481 118922 0 0 3 0x14200 bored viomb 92288 97043 0 0 3 0x40014200 acpi0 acpi0 79154 194192 0 0 3 0x40014200 idle1 9128 384864 0 0 3 0x14200 bored softnet 43969 166997 0 0 3 0x14200 bored softnet 8644 213161 0 0 3 0x14200 bored softnet 72419 380346 0 0 3 0x14200 bored softnet 80766 511974 0 0 3 0x14200 bored systqmp 65485 302323 0 0 3 0x14200 bored systq 92381 439418 0 0 3 0x40014200 bored softclock 20787 134728 0 0 3 0x40014200 idle0 1 5966 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 7369 (syz-executor.7) thread 0xffff8000212938e8 (488881) exclusive rrwlock inode r = 0 (0xfffffd8065b60f80) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6f5 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1848 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bbb85e8) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1848 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 6553K 7125K 78643K 16421 0 pcb 13 18K 21K 78643K 762 0 rtable 192 14K 16K 78643K 1558 0 ifaddr 76 25K 27K 78643K 405 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 36K 78643K 208 0 ioctlops 0 0K 4K 78643K 1642 0 iov 0 0K 16K 78643K 542 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1427 89K 89K 78643K 3768 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 38 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 393 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 81K 78643K 3162 0 sigio 0 0K 0K 78643K 19 0 proc 70 91K 115K 78643K 1229 0 subproc 91 5K 6K 78643K 377 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 1843 0 in_multi 75 5K 7K 78643K 967 0 ether_multi 1 0K 0K 78643K 35 0 mrt 1 0K 0K 78643K 11 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 229 1023K 1023K 78643K 229 0 exec 0 0K 1K 78643K 945 0 pfkey data 0 0K 0K 78643K 4 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 374 87K 97K 78643K 32539 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 101 0 NDP 15 0K 2K 78643K 173 0 temp 128 5854K 5982K 78643K 55445 0 kqueue 12 18K 26K 78643K 218 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 173 0 170 2 1 1 2 0 8 0 rtentry 112 578 0 495 5 1 4 4 0 8 1 unpcb 144 2031 0 2014 40 39 1 11 0 8 0 syncache 296 21 0 21 5 4 1 1 0 8 1 tcpqe 32 404 0 404 4 4 0 2 0 8 0 tcpcb 776 994 0 990 30 21 9 14 0 8 8 arp 120 70 0 54 1 0 1 1 0 8 0 inpcb 368 4571 0 4562 56 47 9 13 0 8 8 nd6 136 133 0 115 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 kcovpl 48 29 0 22 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1256 33 0 33 6 6 0 1 0 8 0 pppxif 1456 14 0 14 3 3 0 1 0 8 0 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 12 0 11 2 1 1 1 0 482 0 pffrnode 88 12 0 11 2 1 1 1 0 8 0 pffrent 40 25 0 24 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 pfanchor 1288 7 0 0 1 0 1 1 0 8 0 pfqueue 264 4 0 4 1 1 0 1 0 8 0 pfstitem 24 160 0 126 1 0 1 1 0 8 0 pfstkey 128 166 0 132 2 0 2 2 0 8 0 pfstate 384 163 0 129 6 1 5 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2891 0 2542 46 18 28 37 0 8 0 art_table 32 2892 0 2542 5 1 4 5 0 8 0 art_node 16 574 0 503 1 0 1 1 0 8 0 sysvmsgpl 40 48 0 8 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 391 0 381 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5098 0 3647 91 0 91 91 0 8 0 ffsino 272 5098 0 3647 98 0 98 98 0 8 0 nchpl 144 9239 0 7584 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 32869 0 32869 3 2 1 2 0 8 1 percpumem 16 117 0 76 1 0 1 1 0 8 0 kstatmem 264 138 0 112 3 0 3 3 0 8 0 scxspl 216 27655 0 27654 19 16 3 8 0 8 2 plimitpl 152 365 0 350 1 0 1 1 0 8 0 sigapl 424 3463 0 3398 9 1 8 8 0 8 0 futexpl 64 25225 0 25223 1 0 1 1 0 8 0 knotepl 120 623 0 0 17 0 17 17 0 8 0 kqueuepl 216 458 0 450 10 9 1 5 0 8 0 pipepl 320 844 0 816 14 11 3 9 0 8 0 fdescpl 496 3424 0 3398 6 2 4 5 0 8 0 filepl 152 21709 0 21483 54 39 15 23 0 8 3 lockfpl 104 1116 0 1114 4 3 1 2 0 8 0 lockfspl 48 302 0 300 1 0 1 1 0 8 0 sessionpl 144 46 0 30 1 0 1 1 0 8 0 pgrppl 48 53 0 37 1 0 1 1 0 8 0 ucredpl 104 2088 0 2076 1 0 1 1 0 8 0 zombiepl 144 3399 0 3398 1 0 1 1 0 8 0 processpl 1072 3463 0 3398 5 0 5 5 0 8 0 procpl 696 8698 0 8616 19 9 10 10 0 8 0 srpgc 96 34 0 34 4 3 1 1 0 8 1 sosppl 168 25 0 25 7 6 1 1 0 8 1 sockpl 488 6781 0 6752 184 172 12 45 0 8 8 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 15 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 23 0 0 3 1 2 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 441 0 0 55 0 55 55 0 8 0 mtagpl 96 157 0 0 4 0 4 4 0 8 0 mbufpl 256 1397 0 0 78 0 78 78 0 8 0 bufpl 288 8944 0 2630 452 0 452 452 0 8 0 anonpl 24 463060 0 447803 132 26 106 123 0 186 0 amapchunkpl 152 102295 0 101360 60 17 43 47 0 158 1 amappl16 200 9465 0 8980 47 20 27 36 0 8 1 amappl15 192 46 0 45 1 0 1 1 0 8 0 amappl14 184 231 0 216 2 1 1 2 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 4420 0 4390 3 1 2 2 0 8 0 amappl11 160 61 0 47 1 0 1 1 0 8 0 amappl10 152 49 0 39 1 0 1 1 0 8 0 amappl9 144 225 0 225 4 4 0 2 0 8 0 amappl8 136 358 0 274 4 0 4 4 0 8 0 amappl7 128 91 0 70 1 0 1 1 0 8 0 amappl6 120 404 0 383 2 1 1 2 0 8 0 amappl5 112 281 0 272 1 0 1 1 0 8 0 amappl4 104 964 0 920 3 1 2 3 0 8 0 amappl3 96 19995 0 19920 4 1 3 3 0 8 0 amappl2 88 3822 0 3754 3 1 2 3 0 8 0 amappl1 80 22220 0 21678 23 10 13 23 0 8 0 amappl 88 31733 0 31496 7 0 7 7 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 3424 0 3398 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3424 0 3398 1 0 1 1 0 8 0 vmmpekpl 168 32160 0 32097 4 0 4 4 0 8 0 vmmpepl 168 235543 0 233188 220 88 132 141 0 357 12 vmsppl 456 3423 0 3398 5 1 4 5 0 8 0 rwobjpl 56 65846 0 58200 111 2 109 110 0 8 0 pdppl 4096 6856 0 6796 334 264 70 78 0 8 10 pvpl 32 1197346 0 1176547 342 151 191 341 0 265 0 pmappl 248 3423 0 3398 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1237 0 341 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bc9ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82cf19c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cf19c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002840bc20,ffff80000006ba00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x1d ast(ffff80002840bd90) at ast+0x10c mi_ast sys/sys/syscall_mi.h:192 [inline] ast(ffff80002840bd90) at ast+0x10c sys/arch/amd64/amd64/trap.c:550 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x21b5618c0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82bc9ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82cf19c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cf19c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002840bc20,ffff80000006ba00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x1d ast(ffff80002840bd90) at ast+0x10c mi_ast sys/sys/syscall_mi.h:192 [inline] ast(ffff80002840bd90) at ast+0x10c sys/arch/amd64/amd64/trap.c:550 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x21b5618c0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at igmp_leavegroup+0xaf: movl 0x4(%rax),%r12d igmp_leavegroup(ffff800000cc7c80,ffff8000006b8000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cc7c80) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff8000006c8c20) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd806f5328a0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd806eefd7a8) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd806eefd7a8,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd806eefd7a8,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd806ba3c310,ffff800021224848) at soo_close+0x44 fdrop(fffffd806ba3c310,ffff800021224848) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806ba3c310,ffff800021224848) at closef+0x120 sys/kern/kern_descrip.c:1258 fdfree(ffff800021224848) at fdfree+0xf4 sys/kern/kern_descrip.c:1190 exit1(ffff800021224848,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:197 sys_exit(ffff800021224848,ffff80002837b540,ffff80002837b590) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002837b610) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002837b610) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d7414bdd3b0, count: 1 ddb{1}> trace igmp_leavegroup(ffff800000cc7c80,ffff8000006b8000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cc7c80) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff8000006c8c20) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd806f5328a0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd806eefd7a8) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd806eefd7a8,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd806eefd7a8,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd806ba3c310,ffff800021224848) at soo_close+0x44 fdrop(fffffd806ba3c310,ffff800021224848) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806ba3c310,ffff800021224848) at closef+0x120 sys/kern/kern_descrip.c:1258 fdfree(ffff800021224848) at fdfree+0xf4 sys/kern/kern_descrip.c:1190 exit1(ffff800021224848,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:197 sys_exit(ffff800021224848,ffff80002837b540,ffff80002837b590) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002837b610) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002837b610) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d7414bdd3b0, count: -14