uvm_fault(0xfffffd806631e300, 0x4, 0, 1) -> e kernel: page fault trap, code=0 Stopped at igmp_leavegroup+0x80: movl 0x4(%rax),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND 52495 96160 0 0x14000 0x200 0 reaper igmp_leavegroup(ffff800000bf0440) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bf0440) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c1af90) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd80779ee268) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806d4d95b8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd806d4d95b8,0) at soclose+0x255 sys/kern/uipc_socket.c:361 soo_close(fffffd80669f5610,ffff8000fffe7a40) at soo_close+0x40 fdrop(fffffd80669f5610,ffff8000fffe7a40) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80669f5610,ffff8000fffe7a40) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000fffe7a40) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe7a40,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000fffe7a40,ffff80002e3d24b0,ffff80002e3d2510) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e3d2580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3d2580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe59e0, 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(0xfffffd806631e300, 0x4, 0, 1) -> e ddb{1}> trace igmp_leavegroup(ffff800000bf0440) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bf0440) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c1af90) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd80779ee268) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806d4d95b8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd806d4d95b8,0) at soclose+0x255 sys/kern/uipc_socket.c:361 soo_close(fffffd80669f5610,ffff8000fffe7a40) at soo_close+0x40 fdrop(fffffd80669f5610,ffff8000fffe7a40) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80669f5610,ffff8000fffe7a40) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000fffe7a40) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe7a40,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000fffe7a40,ffff80002e3d24b0,ffff80002e3d2510) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e3d2580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3d2580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe59e0, count: -14 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002e3d2130 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0 r9 0x1 r10 0x6957282d67d5e6a2 r11 0x5c870d51b2d37922 r12 0 r13 0x3 r14 0xffff800000689000 r15 0xffff800000bf0440 rip 0xffffffff820ed920 igmp_leavegroup+0x80 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e3d2100 ss 0x10 igmp_leavegroup+0x80: movl 0x4(%rax),%r12d ddb{1}> show proc PROC (syz-executor.2) pid=231990 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffe7500,0xffff8000ffff4a90 process=0xffff8000fffe8020 user=0xffff80002e3cd000, vmspace=0xfffffd806631e300 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38015 398471 12153 0 2 0 syz-executor.1 38015 178208 12153 0 3 0x4000080 kqsel syz-executor.1 22065 179466 51973 0 2 0 syz-executor.5 37486 484598 49783 0 2 0 syz-executor.4 37486 376832 49783 0 3 0x4000080 fsleep syz-executor.4 37486 500717 49783 0 3 0x4000080 fsleep syz-executor.4 43333 184542 17215 0 2 0 syz-executor.3 43333 106286 17215 0 3 0x4000080 fsleep syz-executor.3 43333 75861 17215 0 2 0x4000000 syz-executor.3 17215 489443 18499 0 3 0x82 nanoslp syz-executor.3 51973 510959 18499 0 3 0x82 nanoslp syz-executor.5 49783 311944 18499 0 3 0x82 nanoslp syz-executor.4 96597 440378 0 0 3 0x14200 bored sosplice 36662 374046 0 0 3 0x14280 nfsidl nfsio 73553 452126 0 0 3 0x14280 nfsidl nfsio 15331 120412 0 0 3 0x14280 nfsidl nfsio 67508 507908 0 0 3 0x14280 nfsidl nfsio 39272 102442 0 0 3 0x14280 nfsidl nfsio 75900 45182 0 0 3 0x14280 nfsidl nfsio 98225 139865 0 0 3 0x14280 nfsidl nfsio 38331 304991 0 0 3 0x14280 nfsidl nfsio 59313 272350 0 0 3 0x14280 nfsidl nfsio 94108 498222 0 0 3 0x14280 nfsidl nfsio 92794 150023 0 0 3 0x14280 nfsidl nfsio 30693 214217 0 0 3 0x14280 nfsidl nfsio 62988 23016 0 0 3 0x14280 nfsidl nfsio 46731 336445 0 0 3 0x14280 nfsidl nfsio 87980 4877 0 0 3 0x14280 nfsidl nfsio 7467 224763 0 0 3 0x14280 nfsidl nfsio 69500 209522 0 0 3 0x14280 nfsidl nfsio 20075 30507 0 0 3 0x14280 nfsidl nfsio 23012 300149 0 0 3 0x14280 nfsidl nfsio 8586 29696 0 0 3 0x14280 nfsidl nfsio 98007 385944 18499 0 3 0x82 nanoslp syz-executor.7 68043 72207 18499 0 3 0x82 nanoslp syz-executor.6 50157 407979 18499 0 3 0x82 nanoslp syz-executor.2 12153 136406 18499 0 3 0x82 nanoslp syz-executor.1 90636 114769 18499 0 3 0x82 nanoslp syz-executor.0 18499 53325 86324 0 3 0x82 thrsleep syz-fuzzer 18499 334912 86324 0 3 0x4000082 nanoslp syz-fuzzer 18499 87680 86324 0 3 0x4000082 thrsleep syz-fuzzer 18499 296586 86324 0 3 0x4000082 thrsleep syz-fuzzer 18499 330565 86324 0 3 0x4000082 thrsleep syz-fuzzer 18499 521118 86324 0 3 0x4000082 thrsleep syz-fuzzer 18499 417288 86324 0 3 0x4000082 kqread syz-fuzzer 18499 121560 86324 0 3 0x4000082 thrsleep syz-fuzzer 18499 479842 86324 0 3 0x4000082 thrsleep syz-fuzzer 86324 265807 47514 0 3 0x10008a sigsusp ksh 47514 339061 31281 0 3 0x9a poll sshd 38073 40717 1 0 3 0x100083 ttyin getty 31281 432654 1 0 3 0x88 poll sshd 19952 306486 10631 74 3 0x100092 bpf pflogd 10631 510868 1 0 3 0x80 netio pflogd 95456 337943 5075 73 3 0x100090 kqread syslogd 5075 87831 1 0 3 0x100082 netio syslogd 24021 394779 1 0 3 0x100080 kqread resolvd 40987 95252 77100 77 3 0x100092 kqread dhcpleased 17345 511860 77100 77 3 0x100092 kqread dhcpleased 77100 489120 1 0 3 0x80 kqread dhcpleased 8063 502816 0 0 3 0x14200 bored smr 52835 168531 0 0 2 0x14200 zerothread 94227 104741 0 0 3 0x14200 aiodoned aiodoned 79 78422 0 0 3 0x14200 syncer update 56327 251717 0 0 3 0x14200 cleaner cleaner 96160 52495 0 0 7 0x14200 reaper 84170 337630 0 0 3 0x14200 pgdaemon pagedaemon 73266 512668 0 0 3 0x14200 bored viomb 70530 77948 0 0 3 0x40014200 acpi0 acpi0 59093 436980 0 0 3 0x40014200 idle1 59297 382145 0 0 3 0x14200 bored softnet 20011 148747 0 0 3 0x14200 bored systqmp 87572 4144 0 0 3 0x14200 bored systq 54559 34191 0 0 3 0x40014200 bored softclock 4239 304960 0 0 3 0x40014200 idle0 1 150958 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 6477K 6742K 78643K 12756 0 pcb 13 11K 13K 78643K 82 0 rtable 227 7K 10K 78643K 788 0 ifaddr 94 19K 19K 78643K 277 0 counters 58 35K 35K 78643K 74 0 ioctlops 0 0K 4K 78643K 1647 0 iov 0 0K 12K 78643K 73 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1340 84K 84K 78643K 2207 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 19 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 181 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 89K 78643K 1300 0 sigio 0 0K 0K 78643K 11 0 proc 70 87K 124K 78643K 696 0 subproc 104 6K 6K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 125 0 in_multi 97 6K 6K 78643K 187 0 ether_multi 1 0K 0K 78643K 16 0 mrt 0 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 85 387K 387K 78643K 85 0 exec 0 0K 2K 78643K 910 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 7 26K 26K 78643K 7 0 UVM amap 363 183K 183K 78643K 17854 0 UVM aobj 39 5K 5K 78643K 39 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 14 0 NDP 13 0K 1K 78643K 47 0 temp 135 4699K 4767K 78643K 10861 0 kqueue 10 14K 18K 78643K 53 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 120 214 0 211 3 2 1 3 0 8 0 rtentry 112 203 0 100 4 0 4 4 0 8 0 unpcb 136 589 0 570 11 10 1 6 0 8 0 syncache 296 10 0 10 3 3 0 1 0 8 0 sackhl 24 1 0 1 1 0 1 1 0 8 1 tcpqe 32 41 0 41 2 2 0 1 0 8 0 tcpcb 736 507 0 502 35 26 9 16 0 8 8 arp 120 39 0 20 1 0 1 1 0 8 0 inpcb 304 868 0 857 23 14 9 9 0 8 7 nd6 48 44 0 17 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 1 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 pffrag 232 40 0 35 1 0 1 1 0 482 0 pffrnode 88 40 0 35 1 0 1 1 0 8 0 pffrent 40 186 0 181 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 61 0 60 4 3 1 1 0 8 0 pftag 88 6 0 4 1 0 1 1 0 8 0 pfstitem 24 33 0 30 1 0 1 1 0 8 0 pfstkey 112 33 0 30 1 0 1 1 0 8 0 pfstate 320 33 0 30 2 0 2 2 0 8 0 pfrule 1360 90 0 40 6 1 5 5 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 791 0 350 34 6 28 29 0 8 0 art_table 32 792 0 350 4 0 4 4 0 8 0 art_node 16 202 0 111 1 0 1 1 0 8 0 sysvmsgpl 40 46 0 17 1 0 1 1 0 8 0 semapl 112 179 0 169 1 0 1 1 0 8 0 shmpl 112 36 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3359 0 1914 91 0 91 91 0 8 0 ffsino 272 3359 0 1914 97 0 97 97 0 8 0 nchpl 144 5285 0 3663 63 0 63 63 0 8 0 uvmvnodes 80 3808 0 0 78 0 78 78 0 8 0 vnodes 224 3808 0 0 224 0 224 224 0 8 0 namei 1024 19806 0 19806 2 1 1 2 0 8 1 percpumem 16 49 0 8 1 0 1 1 0 8 0 vcpupl 2048 6 0 0 1 0 1 1 0 8 0 vmpool 560 6 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 15 0 15 4 4 0 1 0 8 0 scxspl 216 17624 0 17624 10 9 1 8 0 8 1 plimitpl 152 93 0 78 1 0 1 1 0 8 0 sigapl 424 1612 0 1549 8 0 8 8 0 8 0 futexpl 64 10227 0 10224 2 1 1 1 0 8 0 knotepl 112 114 0 0 3 0 3 3 0 8 0 kqueuepl 216 134 0 126 1 0 1 1 0 8 0 pipepl 336 268 0 240 6 3 3 6 0 8 0 fdescpl 496 1577 0 1549 5 1 4 5 0 8 0 filepl 152 10488 0 10243 27 13 14 18 0 8 4 lockfpl 104 282 0 280 1 0 1 1 0 8 0 lockfspl 48 68 0 66 1 0 1 1 0 8 0 sessionpl 144 29 0 12 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 96 2897 0 2885 1 0 1 1 0 8 0 zombiepl 144 1550 0 1546 1 0 1 1 0 8 0 processpl 1064 1612 0 1546 5 0 5 5 0 8 0 procpl 672 3833 0 3752 10 2 8 9 0 8 0 srpgc 96 8 0 8 3 3 0 1 0 8 0 sosppl 168 16 0 16 2 2 0 1 0 8 0 sockpl 480 1678 0 1648 47 35 12 20 0 8 8 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 14 0 0 2 0 2 2 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 168 0 0 20 1 19 20 0 8 0 mtagpl 96 71 0 0 2 0 2 2 0 8 0 mbufpl 256 937 0 0 56 0 56 56 0 8 0 bufpl 288 5552 0 149 386 0 386 386 0 8 0 anonpl 24 425827 0 406027 195 46 149 194 0 186 24 amapchunkpl 152 46751 0 45850 71 34 37 65 0 158 0 amappl16 200 3783 0 3189 43 11 32 43 0 8 0 amappl15 192 515 0 507 1 0 1 1 0 8 0 amappl14 184 447 0 436 1 0 1 1 0 8 0 amappl13 176 184 0 183 1 0 1 1 0 8 0 amappl12 168 221 0 215 2 1 1 1 0 8 0 amappl11 160 151 0 137 1 0 1 1 0 8 0 amappl10 152 181 0 175 1 0 1 1 0 8 0 amappl9 144 478 0 475 1 0 1 1 0 8 0 amappl8 136 872 0 808 3 0 3 3 0 8 0 amappl7 128 280 0 268 1 0 1 1 0 8 0 amappl6 120 220 0 199 2 1 1 2 0 8 0 amappl5 112 974 0 957 1 0 1 1 0 8 0 amappl4 104 1401 0 1371 2 1 1 2 0 8 0 amappl3 96 441 0 427 1 0 1 1 0 8 0 amappl2 88 908 0 861 4 2 2 3 0 8 0 amappl1 80 31822 0 31227 21 8 13 19 0 8 0 amappl 88 17274 0 17009 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 38 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1583 0 1549 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1583 0 1549 1 0 1 1 0 8 0 vmmpekpl 168 16274 0 16221 4 1 3 3 0 8 0 vmmpepl 168 149603 0 147032 164 42 122 148 0 357 1 vmsppl 368 1582 0 1548 5 1 4 4 0 8 0 rwobjpl 56 40560 0 35108 79 1 78 78 0 8 0 pdppl 4096 3173 0 3102 177 102 75 81 0 8 4 pvpl 32 843684 0 819154 347 78 269 324 0 265 68 pmappl 248 1582 0 1548 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 931 0 143 23 0 23 23 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82926ff0) at x86_ipi_db+0x1a 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(ffffffff82b461a8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b461a8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f pool_do_put(ffffffff82a9faf0,fffffd8069943190) at pool_do_put+0x115 pool_put(ffffffff82a9faf0,fffffd8069943190) at pool_put+0x95 sys/kern/subr_pool.c:801 pmap_do_remove(fffffd80757fa2e8,4ffc5e52000,4ffc6051000,0) at pmap_do_remove+0x607 sys/arch/amd64/amd64/pmap.c:1879 uvm_unmap_kill_entry_withlock(fffffd806631e470,fffffd806630a0a8,0) at uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:2139 uvm_map_teardown(fffffd806631e470) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806631e470) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd806631e470) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f9a40) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff82926ff0) at x86_ipi_db+0x1a 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(ffffffff82b461a8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b461a8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f pool_do_put(ffffffff82a9faf0,fffffd8069943190) at pool_do_put+0x115 pool_put(ffffffff82a9faf0,fffffd8069943190) at pool_put+0x95 sys/kern/subr_pool.c:801 pmap_do_remove(fffffd80757fa2e8,4ffc5e52000,4ffc6051000,0) at pmap_do_remove+0x607 sys/arch/amd64/amd64/pmap.c:1879 uvm_unmap_kill_entry_withlock(fffffd806631e470,fffffd806630a0a8,0) at uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:2139 uvm_map_teardown(fffffd806631e470) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806631e470) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd806631e470) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f9a40) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at igmp_leavegroup+0x80: movl 0x4(%rax),%r12d igmp_leavegroup(ffff800000bf0440) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bf0440) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c1af90) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd80779ee268) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806d4d95b8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd806d4d95b8,0) at soclose+0x255 sys/kern/uipc_socket.c:361 soo_close(fffffd80669f5610,ffff8000fffe7a40) at soo_close+0x40 fdrop(fffffd80669f5610,ffff8000fffe7a40) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80669f5610,ffff8000fffe7a40) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000fffe7a40) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe7a40,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000fffe7a40,ffff80002e3d24b0,ffff80002e3d2510) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e3d2580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3d2580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe59e0, count: 1 ddb{1}> trace igmp_leavegroup(ffff800000bf0440) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bf0440) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c1af90) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd80779ee268) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806d4d95b8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd806d4d95b8,0) at soclose+0x255 sys/kern/uipc_socket.c:361 soo_close(fffffd80669f5610,ffff8000fffe7a40) at soo_close+0x40 fdrop(fffffd80669f5610,ffff8000fffe7a40) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80669f5610,ffff8000fffe7a40) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000fffe7a40) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe7a40,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000fffe7a40,ffff80002e3d24b0,ffff80002e3d2510) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e3d2580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3d2580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe59e0, count: -14