uvm_fault(0xfffffd8069d6dd00, 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(ffff800000dca780,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000dca780) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000da9c80) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd805a01a570) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8075da8588) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8075da8588,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8075da8588,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd806808e9e8,ffff8000216e45d0) at soo_close+0x44 fdrop(fffffd806808e9e8,ffff8000216e45d0) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806808e9e8,ffff8000216e45d0) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216e45d0) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216e45d0,0,19,1) at exit1+0x35d sys/kern/kern_exit.c:197 sigexit(ffff8000216e45d0,19) at sigexit+0xd2 sys/kern/kern_sig.c:1571 postsig(ffff8000216e45d0,19,ffff80002b432158) at postsig+0x499 sys/kern/kern_sig.c:1498 userret(ffff8000216e45d0) at userret+0x10e sys/kern/kern_sig.c:1988 end trace frame: 0xffff80002b432240, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xfffffd8069d6dd00, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000dca780,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000dca780) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000da9c80) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd805a01a570) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8075da8588) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8075da8588,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8075da8588,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd806808e9e8,ffff8000216e45d0) at soo_close+0x44 fdrop(fffffd806808e9e8,ffff8000216e45d0) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806808e9e8,ffff8000216e45d0) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216e45d0) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216e45d0,0,19,1) at exit1+0x35d sys/kern/kern_exit.c:197 sigexit(ffff8000216e45d0,19) at sigexit+0xd2 sys/kern/kern_sig.c:1571 postsig(ffff8000216e45d0,19,ffff80002b432158) at postsig+0x499 sys/kern/kern_sig.c:1498 userret(ffff8000216e45d0) at userret+0x10e sys/kern/kern_sig.c:1988 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7f0bddc5f660, count: -15 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002b431cc0 rbx 0x7 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0xcb292dd6d4ee9e14 r11 0xde37f483cce18b5f r12 0 r13 0x3 r14 0xffff800000dca780 r15 0xffff8000006b7000 rip 0xffffffff81a7f12f igmp_leavegroup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002b431c90 ss 0 igmp_leavegroup+0xaf: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.7) pid=466027 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000216e58d8,0xffff8000216e5630 process=0xffff8000216d07f0 user=0xffff80002b42d000, vmspace=0xfffffd8069d6dd00 estcpu=36, cpticks=21, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 24443 512675 29257 0 2 0 syz-executor.0 78476 156666 83913 0 3 0x80 nanoslp syz-executor.2 78476 494716 83913 0 3 0x4000080 kqread syz-executor.2 78476 253339 83913 0 3 0x4000080 fsleep syz-executor.2 44709 215979 50736 0 2 0 syz-executor.3 44709 64392 50736 0 3 0x4000080 fsleep syz-executor.3 29257 46617 74609 0 3 0x82 nanoslp syz-executor.0 99798 473574 74609 0 3 0x82 nanoslp syz-executor.7 50736 372064 74609 0 3 0x82 nanoslp syz-executor.3 85398 508623 74609 0 3 0x82 nanoslp syz-executor.5 98768 346750 74609 0 2 0x2 syz-executor.6 38087 307621 1 0 3 0x100083 ttyin getty 36990 333650 74609 0 3 0x82 nanoslp syz-executor.4 95298 336113 74609 0 3 0x82 nanoslp syz-executor.1 83913 44684 74609 0 3 0x82 nanoslp syz-executor.2 36540 360602 0 0 3 0x14280 nfsidl nfsio 32123 268452 0 0 3 0x14280 nfsidl nfsio 28721 32794 0 0 3 0x14280 nfsidl nfsio 58786 310554 0 0 3 0x14280 nfsidl nfsio 36746 478097 0 0 3 0x14280 nfsidl nfsio 31517 41393 0 0 3 0x14280 nfsidl nfsio 55430 52638 0 0 3 0x14280 nfsidl nfsio 31234 59229 0 0 3 0x14280 nfsidl nfsio 10209 317873 0 0 3 0x14280 nfsidl nfsio 57161 77795 0 0 3 0x14280 nfsidl nfsio 2111 437934 0 0 3 0x14280 nfsidl nfsio 48381 177672 0 0 3 0x14280 nfsidl nfsio 80642 329122 0 0 3 0x14280 nfsidl nfsio 99611 517610 0 0 3 0x14280 nfsidl nfsio 39558 92396 0 0 3 0x14280 nfsidl nfsio 91733 328926 0 0 3 0x14280 nfsidl nfsio 36866 479500 0 0 3 0x14280 nfsidl nfsio 40409 267254 0 0 3 0x14280 nfsidl nfsio 44093 308844 0 0 3 0x14280 nfsidl nfsio 68896 482148 0 0 3 0x14280 nfsidl nfsio 51506 331219 0 0 3 0x14200 bored sosplice 74609 159538 93919 0 3 0x82 thrsleep syz-fuzzer 74609 376439 93919 0 3 0x4000082 nanoslp syz-fuzzer 74609 439 93919 0 3 0x4000082 wait syz-fuzzer 74609 314908 93919 0 3 0x4000082 wait syz-fuzzer 74609 351485 93919 0 3 0x4000082 thrsleep syz-fuzzer 74609 426168 93919 0 3 0x4000082 wait syz-fuzzer 74609 38076 93919 0 3 0x4000082 wait syz-fuzzer 74609 231835 93919 0 3 0x4000082 thrsleep syz-fuzzer 74609 138656 93919 0 3 0x4000082 wait syz-fuzzer 74609 243369 93919 0 3 0x4000082 wait syz-fuzzer 74609 14143 93919 0 3 0x4000082 thrsleep syz-fuzzer 74609 263016 93919 0 3 0x4000082 wait syz-fuzzer 74609 399463 93919 0 3 0x4000082 wait syz-fuzzer 74609 327497 93919 0 3 0x4000082 kqread syz-fuzzer 93919 102958 81350 0 3 0x10008a sigsusp ksh 81350 86733 26467 0 3 0x9a kqread sshd 26467 267093 1 0 3 0x88 kqread sshd 25786 70291 3092 73 3 0x1100090 kqread syslogd 3092 208929 1 0 3 0x100082 netio syslogd 44392 402732 1 0 3 0x100080 kqread resolvd 92437 445248 36619 77 3 0x100092 kqread dhcpleased 55358 183452 36619 77 3 0x100092 kqread dhcpleased 36619 94873 1 0 3 0x80 kqread dhcpleased 1515 291039 0 0 3 0x14200 bored smr 33216 44338 0 0 2 0x14200 zerothread 65189 237455 0 0 3 0x14200 aiodoned aiodoned 84203 489957 0 0 3 0x14200 syncer update 87757 170024 0 0 3 0x14200 cleaner cleaner 93611 483816 0 0 3 0x14200 reaper reaper 31071 294459 0 0 3 0x14200 pgdaemon pagedaemon 9416 73787 0 0 3 0x14200 bored viomb 99392 300997 0 0 3 0x40014200 acpi0 acpi0 950 236263 0 0 3 0x14200 bored softnet3 90558 492638 0 0 3 0x14200 bored softnet2 31592 221360 0 0 3 0x14200 bored softnet1 46783 453899 0 0 3 0x14200 bored softnet0 17972 299075 0 0 3 0x14200 bored systqmp 90342 252623 0 0 3 0x14200 bored systq 76982 76163 0 0 3 0x40014200 bored softclock 59373 71202 0 0 3 0x40014200 idle0 1 123459 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 10202 6508K 7572K 78643K 16033 0 pcb 13 18K 20K 78643K 1019 0 rtable 217 16K 17K 78643K 1989 0 ifaddr 86 24K 26K 78643K 637 0 sysctl 2 0K 0K 78643K 4 0 counters 28 17K 17K 78643K 203 0 ioctlops 0 0K 4K 78643K 439 0 iov 0 0K 32K 78643K 658 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1499 94K 94K 78643K 5108 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 92 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 189 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 77K 78643K 7225 0 sigio 0 0K 0K 78643K 194 0 proc 60 59K 83K 78643K 2068 0 subproc 104 6K 6K 78643K 416 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 1K 78643K 25537 0 in_multi 87 5K 7K 78643K 3229 0 ether_multi 1 0K 0K 78643K 45 0 mrt 1 0K 0K 78643K 25 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 163 731K 731K 78643K 163 0 exec 0 0K 1K 78643K 1877 0 pfkey data 0 0K 0K 78643K 7 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 358 96K 109K 78643K 67281 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 217 0 NDP 15 0K 1K 78643K 207 0 temp 141 5858K 6886K 78643K 105332 0 kqueue 13 20K 26K 78643K 1297 0 SYN cache 2 36K 44K 78643K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 993 0 990 20 19 1 5 0 8 0 rtentry 112 652 0 561 5 1 4 4 0 8 0 unpcb 144 7167 0 7154 63 60 3 6 0 8 2 syncache 296 26 0 26 6 6 0 1 0 8 0 tcpqe 32 351 0 351 4 4 0 1 0 8 0 tcpcb 776 2000 0 1996 55 51 4 11 0 8 3 arp 88 83 0 67 1 0 1 1 0 8 0 inpcb 336 20429 0 20416 135 126 9 15 0 8 7 nd6 104 154 0 131 1 0 1 1 0 8 0 pkpcb 40 106 0 106 9 9 0 1 0 8 0 kcovpl 48 32 0 24 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1160 91 0 91 12 12 0 1 0 8 0 pppxif 1360 46 0 46 9 9 0 1 0 8 0 pfstscr 40 5 0 1 1 0 1 1 0 8 0 pfosfp 40 6 0 5 1 0 1 1 0 8 0 pfosfpen 112 6 0 5 1 0 1 1 0 8 0 pfanchor 1288 512 5 0 43 0 43 43 0 8 0 pfstitem 24 8 0 0 1 0 1 1 0 8 0 pfstkey 128 12 0 9 2 1 1 1 0 8 0 pfstate 352 7 0 3 2 1 1 1 0 8 0 rttmr 136 6 0 6 2 2 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3045 0 2642 49 20 29 30 0 8 0 art_table 32 3046 0 2642 4 0 4 4 0 8 0 art_node 16 637 0 558 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 0 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 180 0 170 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 11351 0 9895 92 0 92 92 0 8 0 ffsino 240 11351 0 9895 87 0 87 87 0 8 0 nchpl 144 21998 0 20351 63 0 63 63 0 8 0 rtmask 32 9 0 9 3 3 0 1 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 78301 0 78301 10 9 1 3 0 8 1 kstatmem 264 262 0 232 3 0 3 3 0 8 0 scsiplug 72 10 0 10 2 2 0 1 0 8 0 scxspl 216 67039 0 67039 16 15 1 8 0 8 1 plimitpl 152 1127 0 1112 1 0 1 1 0 8 0 sigapl 424 7496 0 7431 9 1 8 8 0 8 0 futexpl 64 117568 0 117566 5 4 1 1 0 8 0 knotepl 120 327243 0 327162 77 62 15 19 0 8 8 kqueuepl 184 9461 0 9451 44 40 4 6 0 8 3 pipepl 288 20935 0 20906 107 98 9 15 0 8 5 fdescpl 432 7459 0 7434 5 1 4 4 0 8 0 filepl 120 108497 0 108255 118 102 16 23 0 8 6 lockfpl 104 1507 0 1505 3 2 1 2 0 8 0 lockfspl 48 356 0 354 1 0 1 1 0 8 0 sessionpl 144 49 0 33 1 0 1 1 0 8 0 pgrppl 48 49 0 33 1 0 1 1 0 8 0 ucredpl 104 6583 0 6569 1 0 1 1 0 8 0 zombiepl 144 7435 0 7431 1 0 1 1 0 8 0 processpl 1008 7496 0 7431 10 1 9 9 0 8 0 procpl 696 17704 0 17623 14 5 9 10 0 8 0 sosppl 168 56 0 56 10 9 1 1 0 8 1 sockpl 456 28701 0 28672 439 428 11 29 0 8 6 mcl64k 65536 205 0 205 14 14 0 1 0 8 0 mcl16k 16384 1053 0 1053 8 7 1 1 0 8 1 mcl12k 12288 245 0 245 13 12 1 1 0 8 1 mcl9k 9216 117 0 117 13 12 1 1 0 8 1 mcl8k 8192 511 0 511 14 13 1 1 0 8 1 mcl4k 4096 1093 0 1093 6 5 1 1 0 8 1 mcl2k2 2112 75 0 75 12 11 1 1 0 8 1 mcl2k 2048 87783 0 87740 45 38 7 29 0 8 0 mtagpl 96 289 0 283 4 3 1 2 0 8 0 mbufpl 256 243661 0 243555 341 320 21 109 0 8 3 bufpl 288 15420 0 9032 457 0 457 457 0 8 0 anonpl 24 788851 0 772965 164 59 105 127 0 188 0 amapchunkpl 152 214274 0 213415 82 42 40 48 0 158 2 amappl16 200 14710 0 14225 60 31 29 39 0 8 3 amappl15 192 39 0 39 2 2 0 1 0 8 0 amappl14 184 225 0 213 2 1 1 2 0 8 0 amappl13 176 16 0 16 2 2 0 1 0 8 0 amappl12 168 8442 0 8417 3 1 2 2 0 8 0 amappl11 160 56 0 45 1 0 1 1 0 8 0 amappl10 152 45 0 36 1 0 1 1 0 8 0 amappl9 144 184 0 183 3 2 1 2 0 8 0 amappl8 136 325 0 247 3 0 3 3 0 8 0 amappl7 128 87 0 68 1 0 1 1 0 8 0 amappl6 120 430 0 415 2 1 1 2 0 8 0 amappl5 112 330 0 324 1 0 1 1 0 8 0 amappl4 104 1951 0 1916 3 2 1 2 0 8 0 amappl3 96 42349 0 42282 4 1 3 3 0 8 0 amappl2 88 7904 0 7844 4 2 2 3 0 8 0 amappl1 80 36636 0 36145 22 10 12 22 0 8 0 amappl 88 66435 0 66214 9 2 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 7459 0 7434 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7459 0 7434 1 0 1 1 0 8 0 vmmpekpl 168 134461 0 134402 4 0 4 4 0 8 0 vmmpepl 168 455192 0 453015 268 156 112 130 0 357 0 vmsppl 368 7458 0 7434 3 0 3 3 0 8 0 rwobjpl 24 112161 0 104629 49 2 47 48 0 8 1 pdppl 4096 14925 0 14868 428 363 65 71 0 8 8 pvpl 32 2194745 0 2173423 427 239 188 334 0 265 4 pmappl 216 7458 0 7434 3 1 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1813 0 1025 26 1 25 26 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000dca780,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000dca780) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000da9c80) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd805a01a570) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8075da8588) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8075da8588,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8075da8588,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd806808e9e8,ffff8000216e45d0) at soo_close+0x44 fdrop(fffffd806808e9e8,ffff8000216e45d0) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806808e9e8,ffff8000216e45d0) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216e45d0) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216e45d0,0,19,1) at exit1+0x35d sys/kern/kern_exit.c:197 sigexit(ffff8000216e45d0,19) at sigexit+0xd2 sys/kern/kern_sig.c:1571 postsig(ffff8000216e45d0,19,ffff80002b432158) at postsig+0x499 sys/kern/kern_sig.c:1498 userret(ffff8000216e45d0) at userret+0x10e sys/kern/kern_sig.c:1988 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7f0bddc5f660, count: -15 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000dca780,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000dca780) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000da9c80) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd805a01a570) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8075da8588) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8075da8588,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8075da8588,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd806808e9e8,ffff8000216e45d0) at soo_close+0x44 fdrop(fffffd806808e9e8,ffff8000216e45d0) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806808e9e8,ffff8000216e45d0) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216e45d0) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216e45d0,0,19,1) at exit1+0x35d sys/kern/kern_exit.c:197 sigexit(ffff8000216e45d0,19) at sigexit+0xd2 sys/kern/kern_sig.c:1571 postsig(ffff8000216e45d0,19,ffff80002b432158) at postsig+0x499 sys/kern/kern_sig.c:1498 userret(ffff8000216e45d0) at userret+0x10e sys/kern/kern_sig.c:1988 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7f0bddc5f660, count: -15