uvm_fault(0xfffffd8069cb2460, 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 igmp_leavegroup(ffff800000cf4dc0,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cf4dc0) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000dbb850) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd807e8ad7e0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8065bc0778) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8065bc0778,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8065bc0778,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd805b815348,ffff800024bb1b68) at soo_close+0x44 fdrop(fffffd805b815348,ffff800024bb1b68) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd805b815348,ffff800024bb1b68) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff800024bb1b68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff800024bb1b68,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:197 sys_exit(ffff800024bb1b68,ffff80002e86edf0,ffff80002e86ee40) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e86eec0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5863726cc0, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xfffffd8069cb2460, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000cf4dc0,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cf4dc0) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000dbb850) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd807e8ad7e0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8065bc0778) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8065bc0778,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8065bc0778,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd805b815348,ffff800024bb1b68) at soo_close+0x44 fdrop(fffffd805b815348,ffff800024bb1b68) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd805b815348,ffff800024bb1b68) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff800024bb1b68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff800024bb1b68,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:197 sys_exit(ffff800024bb1b68,ffff80002e86edf0,ffff80002e86ee40) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e86eec0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5863726cc0, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002e86ea80 rbx 0x3 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0xebb03fc96e08d658 r11 0x8eb1e48a3f2509af r12 0 r13 0x3 r14 0xffff800000cf4dc0 r15 0xffff8000006b7000 rip 0xffffffff814966ef igmp_leavegroup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e86ea50 ss 0x10 igmp_leavegroup+0xaf: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.6) pid=390330 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000265bf0b8,0xffff8000ffff1080 process=0xffff80002e842bd0 user=0xffff80002e869000, vmspace=0xfffffd8069cb2460 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 18906 74619 57060 0 3 0x4081000 smrbar syz-executor.5 18906 331781 57060 0 3 0x4003000 suspend syz-executor.5 92049 456628 10800 0 3 0x80 nanoslp syz-executor.2 92049 279070 10800 0 3 0x4000080 netio syz-executor.2 92049 469694 10800 0 3 0x4000080 fsleep syz-executor.2 92049 277743 10800 0 3 0x4000080 fsleep syz-executor.2 92049 472437 10800 0 3 0x4000080 fsleep syz-executor.2 10800 381893 71448 0 3 0x82 nanoslp syz-executor.2 57060 42223 71448 0 3 0x82 nanoslp syz-executor.5 65877 419823 71448 0 3 0x82 piperd syz-executor.4 79294 363901 71448 0 3 0x82 piperd syz-executor.0 67444 372714 71448 0 2 0x482 syz-executor.6 59850 52307 71448 0 2 0x482 syz-executor.7 80696 61031 71448 0 2 0x2 syz-executor.3 28541 378311 1 0 3 0x100083 ttyin getty 45994 399010 71448 0 2 0x2 syz-executor.1 91410 483557 0 0 3 0x14280 nfsidl nfsio 98818 28424 0 0 3 0x14280 nfsidl nfsio 49714 271274 0 0 3 0x14280 nfsidl nfsio 11299 505122 0 0 3 0x14280 nfsidl nfsio 78707 307130 0 0 3 0x14280 nfsidl nfsio 42087 242589 0 0 3 0x14280 nfsidl nfsio 28660 428061 0 0 3 0x14280 nfsidl nfsio 74237 252543 0 0 3 0x14280 nfsidl nfsio 75721 327649 0 0 3 0x14280 nfsidl nfsio 23620 346887 0 0 3 0x14280 nfsidl nfsio 81690 144105 0 0 3 0x14280 nfsidl nfsio 85783 81704 0 0 3 0x14280 nfsidl nfsio 34485 354575 0 0 3 0x14280 nfsidl nfsio 13254 155068 0 0 3 0x14280 nfsidl nfsio 56945 414258 0 0 3 0x14280 nfsidl nfsio 12276 321454 0 0 3 0x14280 nfsidl nfsio 47446 77469 0 0 3 0x14280 nfsidl nfsio 4144 4023 0 0 3 0x14280 nfsidl nfsio 38481 157067 0 0 3 0x14280 nfsidl nfsio 47490 81210 0 0 3 0x14280 nfsidl nfsio 17542 262875 0 0 3 0x14200 bored sosplice 71448 74973 1161 0 3 0x82 wait syz-fuzzer 71448 220965 1161 0 3 0x4000082 thrsleep syz-fuzzer 71448 255573 1161 0 3 0x4000082 thrsleep syz-fuzzer 71448 264592 1161 0 3 0x4000082 thrsleep syz-fuzzer 71448 424537 1161 0 3 0x4000082 wait syz-fuzzer 71448 95845 1161 0 3 0x4000082 thrsleep syz-fuzzer 71448 10144 1161 0 3 0x4000082 wait syz-fuzzer 71448 36036 1161 0 3 0x4000082 wait syz-fuzzer 71448 394773 1161 0 3 0x4000082 wait syz-fuzzer 71448 34982 1161 0 3 0x4000082 thrsleep syz-fuzzer 71448 88104 1161 0 3 0x4000082 wait syz-fuzzer 71448 258592 1161 0 3 0x4000082 wait syz-fuzzer 71448 506941 1161 0 3 0x4000082 kqread syz-fuzzer 71448 498322 1161 0 3 0x4000082 wait syz-fuzzer 1161 348283 47170 0 3 0x10008a sigsusp ksh 47170 60867 3419 0 3 0x9a kqread sshd 3419 83929 1 0 3 0x88 kqread sshd 6053 145545 5684 73 3 0x1100090 kqread syslogd 5684 310045 1 0 3 0x100082 netio syslogd 32892 195573 1 0 3 0x100080 kqread resolvd 40719 352832 0 0 3 0x14200 bored smr 17846 51724 0 0 2 0x14200 zerothread 95882 386488 0 0 3 0x14200 aiodoned aiodoned 34507 43206 0 0 3 0x14200 syncer update 33159 346919 0 0 3 0x14200 cleaner cleaner 54150 219729 0 0 3 0x14200 reaper reaper 5523 79474 0 0 3 0x14200 pgdaemon pagedaemon 33597 510720 0 0 3 0x14200 bored viomb 94283 112378 0 0 3 0x40014200 acpi0 acpi0 86599 314547 0 0 3 0x14200 bored softnet3 89554 166975 0 0 3 0x14200 bored softnet2 39704 2274 0 0 3 0x14200 bored softnet1 80383 434808 0 0 3 0x14200 bored softnet0 80772 332825 0 0 3 0x14200 bored systqmp 57052 37115 0 0 3 0x14200 bored systq 27831 405773 0 0 3 0x40014200 bored softclock 88015 128166 0 0 3 0x40014200 idle0 1 26691 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 6427K 6666K 78643K 13870 0 pcb 13 20K 22K 78643K 2440 0 rtable 219 16K 17K 78643K 3071 0 ifaddr 80 23K 25K 78643K 1143 0 sysctl 2 0K 2K 78643K 8 0 counters 28 17K 17K 78643K 494 0 ioctlops 0 0K 2K 78643K 1408 0 iov 0 0K 28K 78643K 1672 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1572 98K 99K 78643K 15432 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 134 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 1755 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 77K 78643K 12496 0 sigio 0 0K 0K 78643K 223 0 proc 58 43K 75K 78643K 2411 0 subproc 104 6K 6K 78643K 800 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 1585 0 in_multi 89 6K 6K 78643K 1018 0 ether_multi 1 0K 0K 78643K 88 0 mrt 1 0K 0K 78643K 95 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 1K 78643K 2563 0 pfkey data 0 0K 0K 78643K 4233 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 337 87K 105K 78643K 113695 0 UVM aobj 131 4K 6K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 365 0 NDP 14 0K 1K 78643K 380 0 temp 138 5859K 71522K 78643K 114898 0 kqueue 6 10K 22K 78643K 764 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 963 0 962 12 11 1 3 0 8 0 rtentry 112 993 0 901 5 2 3 4 0 8 0 unpcb 144 10670 0 10662 112 104 8 13 0 8 7 syncache 296 67 0 67 22 21 1 1 0 8 1 tcpqe 32 157 0 157 11 10 1 1 0 8 1 tcpcb 776 3676 0 3669 115 113 2 11 0 8 1 arp 88 134 0 118 1 0 1 1 0 8 0 ipq 40 5 0 4 4 3 1 1 0 8 0 ipqe 40 18 0 17 4 3 1 1 0 8 0 inpcb 336 11600 0 11592 193 184 9 15 0 8 8 nd6 104 205 0 184 1 0 1 1 0 8 0 pkpcb 40 6531 0 6531 14 14 0 1 0 8 0 kcovpl 48 61 0 53 1 0 1 1 0 8 0 mppekey 1024 16 0 16 6 5 1 1 0 8 1 ppxss 1160 286 0 286 26 25 1 1 0 8 1 pppxif 1360 181 0 181 18 17 1 1 0 8 1 pfstscr 40 72 0 72 1 1 0 1 0 8 0 pfanchor 1288 782 72 270 47 4 43 43 0 8 0 pfstkey 128 72 0 72 1 1 0 1 0 8 0 pfstate 352 36 0 36 1 1 0 1 0 8 0 rttmr 136 16 0 16 5 5 0 1 0 8 0 art_heap8 4096 5 0 4 4 3 1 2 0 8 0 art_heap4 256 4071 0 3667 53 24 29 30 0 8 1 art_table 32 4076 0 3671 4 0 4 4 0 8 0 art_node 16 892 0 812 1 0 1 1 0 8 0 sysvmsgpl 40 111 0 71 1 0 1 1 0 8 0 semapl 112 1753 0 1743 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 19587 0 18120 93 0 93 93 0 8 0 ffsino 240 19587 0 18120 87 0 87 87 0 8 0 nchpl 144 38015 0 37517 63 41 22 63 0 8 0 rtmask 32 9 0 9 3 3 0 1 0 8 0 uvmvnodes 80 6438 0 0 132 0 132 132 0 8 0 vnodes 216 6438 0 0 358 0 358 358 0 8 0 namei 1024 133459 0 133458 21 20 1 3 0 8 0 kstatmem 264 488 0 460 4 1 3 3 0 8 1 scsiplug 72 8 0 8 4 4 0 1 0 8 0 scxspl 216 125865 0 125865 27 25 2 8 0 8 2 plimitpl 152 1389 0 1375 1 0 1 1 0 8 0 sigapl 424 12717 0 12658 11 3 8 8 0 8 0 futexpl 64 177730 0 177727 12 11 1 1 0 8 0 knotepl 120 208543 0 208479 125 119 6 18 0 8 3 kqueuepl 184 1776 0 1771 20 19 1 6 0 8 0 pipepl 288 2268 0 2240 47 40 7 7 0 8 5 fdescpl 432 12659 0 12638 4 0 4 4 0 8 0 filepl 120 98435 0 98151 159 146 13 21 0 8 4 lockfpl 104 2163 0 2161 4 3 1 2 0 8 0 lockfspl 48 631 0 629 1 0 1 1 0 8 0 sessionpl 144 78 0 63 1 0 1 1 0 8 0 pgrppl 48 441 0 426 1 0 1 1 0 8 0 ucredpl 104 10275 0 10267 1 0 1 1 0 8 0 zombiepl 144 12661 0 12658 5 4 1 1 0 8 0 processpl 1008 12717 0 12658 15 7 8 9 0 8 0 procpl 696 30232 0 30154 33 24 9 10 0 8 1 sosppl 168 89 0 89 20 20 0 1 0 8 0 sockpl 456 29785 0 29768 662 651 11 43 0 8 8 mcl64k 65536 804 0 804 32 31 1 1 0 8 1 mcl16k 16384 294 0 294 36 35 1 1 0 8 1 mcl12k 12288 597 0 597 26 25 1 1 0 8 1 mcl9k 9216 1205 0 1205 19 18 1 1 0 8 1 mcl8k 8192 1245 0 1245 29 28 1 1 0 8 1 mcl4k 4096 1260 0 1260 26 25 1 1 0 8 1 mcl2k2 2112 168 0 168 28 27 1 1 0 8 1 mcl2k 2048 102227 0 102187 63 56 7 30 0 8 0 mtagpl 96 16 0 16 4 4 0 1 0 8 0 mbufpl 256 302295 0 302099 829 813 16 220 0 8 0 bufpl 288 25546 0 19106 461 0 461 461 0 8 0 anonpl 24 1281781 0 1266776 214 103 111 128 0 188 0 amapchunkpl 152 361048 0 360212 126 84 42 50 0 158 0 amappl16 200 25790 0 25340 128 101 27 38 0 8 0 amappl15 192 14 0 14 2 2 0 1 0 8 0 amappl14 184 327 0 315 2 1 1 2 0 8 0 amappl13 176 18 0 16 1 0 1 1 0 8 0 amappl12 168 14078 0 14054 2 0 2 2 0 8 0 amappl11 160 47 0 43 1 0 1 1 0 8 0 amappl10 152 86 0 76 2 1 1 1 0 8 0 amappl9 144 233 0 233 24 23 1 2 0 8 1 amappl8 136 577 0 481 4 0 4 4 0 8 0 amappl7 128 108 0 90 1 0 1 1 0 8 0 amappl6 120 692 0 665 2 1 1 2 0 8 0 amappl5 112 544 0 538 1 0 1 1 0 8 0 amappl4 104 1535 0 1506 2 1 1 2 0 8 0 amappl3 96 72121 0 72054 3 0 3 3 0 8 0 amappl2 88 13837 0 13789 4 2 2 3 0 8 0 amappl1 80 56223 0 55821 22 11 11 22 0 8 0 amappl 88 112486 0 112272 6 0 6 6 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 12659 0 12638 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12659 0 12638 1 0 1 1 0 8 0 vmmpekpl 168 86330 0 86284 4 1 3 3 0 8 0 vmmpepl 168 766459 0 764517 267 156 111 119 0 357 1 vmsppl 368 12658 0 12638 3 0 3 3 0 8 0 rwobjpl 24 180262 0 172342 49 1 48 48 0 8 0 pdppl 4096 25324 0 25276 683 625 58 68 0 8 10 pvpl 32 3603054 0 3583124 687 476 211 359 0 265 29 pmappl 216 12658 0 12638 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2690 0 1908 28 4 24 28 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000cf4dc0,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cf4dc0) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000dbb850) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd807e8ad7e0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8065bc0778) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8065bc0778,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8065bc0778,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd805b815348,ffff800024bb1b68) at soo_close+0x44 fdrop(fffffd805b815348,ffff800024bb1b68) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd805b815348,ffff800024bb1b68) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff800024bb1b68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff800024bb1b68,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:197 sys_exit(ffff800024bb1b68,ffff80002e86edf0,ffff80002e86ee40) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e86eec0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5863726cc0, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000cf4dc0,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cf4dc0) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000dbb850) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd807e8ad7e0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8065bc0778) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8065bc0778,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8065bc0778,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd805b815348,ffff800024bb1b68) at soo_close+0x44 fdrop(fffffd805b815348,ffff800024bb1b68) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd805b815348,ffff800024bb1b68) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff800024bb1b68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff800024bb1b68,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:197 sys_exit(ffff800024bb1b68,ffff80002e86edf0,ffff80002e86ee40) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e86eec0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5863726cc0, count: -14