uvm_fault(0xfffffd8059fdbd88, 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(ffff800000dfa700,ffff8000006ab000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000dfa700) at in_delmulti+0xd3 sys/netinet/in.c:908 ip_freemoptions(ffff8000006ba7b0) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1737 in_pcbdetach(fffffd8079787000) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:606 udp_detach(fffffd806ba01200) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1139 soclose(fffffd806ba01200,0) at soclose+0x80 pru_detach sys/sys/protosw.h:283 [inline] soclose(fffffd806ba01200,0) at soclose+0x80 sys/kern/uipc_socket.c:411 soo_close(fffffd806bbdd358,ffff80002a6b67e8) at soo_close+0x44 fdrop(fffffd806bbdd358,ffff80002a6b67e8) at fdrop+0xd5 sys/kern/kern_descrip.c:1274 closef(fffffd806bbdd358,ffff80002a6b67e8) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff80002a6b67e8) at fdfree+0xe3 sys/kern/kern_descrip.c:1190 exit1(ffff80002a6b67e8,0,0,1) at exit1+0x371 sys/kern/kern_exit.c:199 sys_exit(ffff80002a6b67e8,ffff80003297d5a0,ffff80003297d4f0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80003297d5a0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77f6f0178840, 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(0xfffffd8059fdbd88, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000dfa700,ffff8000006ab000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000dfa700) at in_delmulti+0xd3 sys/netinet/in.c:908 ip_freemoptions(ffff8000006ba7b0) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1737 in_pcbdetach(fffffd8079787000) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:606 udp_detach(fffffd806ba01200) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1139 soclose(fffffd806ba01200,0) at soclose+0x80 pru_detach sys/sys/protosw.h:283 [inline] soclose(fffffd806ba01200,0) at soclose+0x80 sys/kern/uipc_socket.c:411 soo_close(fffffd806bbdd358,ffff80002a6b67e8) at soo_close+0x44 fdrop(fffffd806bbdd358,ffff80002a6b67e8) at fdrop+0xd5 sys/kern/kern_descrip.c:1274 closef(fffffd806bbdd358,ffff80002a6b67e8) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff80002a6b67e8) at fdfree+0xe3 sys/kern/kern_descrip.c:1190 exit1(ffff80002a6b67e8,0,0,1) at exit1+0x371 sys/kern/kern_exit.c:199 sys_exit(ffff80002a6b67e8,ffff80003297d5a0,ffff80003297d4f0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80003297d5a0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77f6f0178840, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003297d140 rbx 0x4 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0x64516d86c69db45c r11 0x390a3c2ff1832a34 r12 0 r13 0x3 r14 0xffff800000dfa700 r15 0xffff8000006ab000 rip 0xffffffff81fd57df igmp_leavegroup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003297d110 ss 0x10 igmp_leavegroup+0xaf: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.6) tid=27263 pid=75572 tcnt=1 stat=onproc flags process=8001008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a6b67e8 forw=0xffffffffffffffff, list=0xffff80002a6b6d08,0xffff80002a63ea68 process=0xffff80002a65e9f0 user=0xffff800032978000, vmspace=0xfffffd8059fdbd88 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 57785 490980 88814 0 2 0x8000000 syz-executor.1 57785 455457 88814 0 3 0xc000080 fsleep syz-executor.1 66760 481149 6130 0 2 0x8000000 syz-executor.7 66760 347385 6130 0 3 0xc000080 sbwait syz-executor.7 71040 387760 42678 0 2 0x8000000 syz-executor.4 71040 338597 42678 0 3 0xc000080 fsleep syz-executor.4 24574 278661 40774 0 2 0x8000000 syz-executor.0 24574 327493 40774 0 3 0xc000080 lockf syz-executor.0 24574 481932 40774 0 3 0xc000080 netcon2 syz-executor.0 69224 289948 30259 0 3 0x8000080 nanoslp syz-executor.5 69224 467696 30259 0 3 0xc000080 lockf syz-executor.5 69224 104706 30259 0 3 0xc000080 fsleep syz-executor.5 11352 372373 87313 0 2 0x8000002 syz-executor.2 40774 430292 87313 0 3 0x8000082 nanoslp syz-executor.0 88814 246475 87313 0 3 0x8000082 nanoslp syz-executor.1 9556 376032 87313 0 3 0x8000082 nanoslp syz-executor.6 30259 99802 87313 0 3 0x8000082 nanoslp syz-executor.5 42678 500031 87313 0 3 0x8000082 nanoslp syz-executor.4 23627 400157 87313 0 3 0x8000082 nanoslp syz-executor.3 6130 274291 87313 0 3 0x8000082 nanoslp syz-executor.7 93720 117736 0 0 3 0x14200 acct acct 99148 260194 0 0 3 0x14200 bored sosplice 36484 63162 0 0 3 0x14280 nfsidl nfsio 40137 369025 0 0 3 0x14280 nfsidl nfsio 55287 419592 0 0 3 0x14280 nfsidl nfsio 47202 195344 0 0 3 0x14280 nfsidl nfsio 85512 65449 0 0 3 0x14280 nfsidl nfsio 41079 59477 0 0 3 0x14280 nfsidl nfsio 20167 459034 0 0 3 0x14280 nfsidl nfsio 41273 155629 0 0 3 0x14280 nfsidl nfsio 47627 87172 0 0 3 0x14280 nfsidl nfsio 23974 497276 0 0 3 0x14280 nfsidl nfsio 49309 270328 0 0 3 0x14280 nfsidl nfsio 1078 307905 0 0 3 0x14280 nfsidl nfsio 87720 211159 0 0 3 0x14280 nfsidl nfsio 88738 127531 0 0 3 0x14280 nfsidl nfsio 38537 315948 0 0 3 0x14280 nfsidl nfsio 6221 53088 0 0 3 0x14280 nfsidl nfsio 6985 368539 0 0 3 0x14280 nfsidl nfsio 70987 314467 0 0 3 0x14280 nfsidl nfsio 60638 175568 0 0 3 0x14280 nfsidl nfsio 96107 393354 0 0 3 0x14280 nfsidl nfsio 87313 128587 14436 0 3 0x1a000082 kqread syz-fuzzer 87313 403733 14436 0 3 0x1e000082 nanoslp syz-fuzzer 87313 456405 14436 0 3 0x1e000082 wait syz-fuzzer 87313 441488 14436 0 3 0x1e000082 thrsleep syz-fuzzer 87313 320966 14436 0 3 0x1e000082 wait syz-fuzzer 87313 120201 14436 0 3 0x1e000082 thrsleep syz-fuzzer 87313 420869 14436 0 3 0x1e000082 wait syz-fuzzer 87313 242372 14436 0 3 0x1e000082 wait syz-fuzzer 87313 415079 14436 0 3 0x1e000082 wait syz-fuzzer 87313 220468 14436 0 3 0x1e000082 wait syz-fuzzer 87313 329925 14436 0 3 0x1e000082 thrsleep syz-fuzzer 87313 474516 14436 0 3 0x1e000082 thrsleep syz-fuzzer 87313 493630 14436 0 3 0x1e000082 wait syz-fuzzer 87313 315417 14436 0 3 0x1e000082 wait syz-fuzzer 14436 77296 84978 0 3 0x810008a sigsusp ksh 84978 519939 45623 0 3 0x1800009a kqread sshd 60768 149937 1 0 3 0x18100083 ttyin getty 45623 521056 1 0 3 0x18000088 kqread sshd 73388 68440 40478 73 2 0x19100010 syslogd 40478 231502 1 0 3 0x18100082 sbwait syslogd 84873 373302 1 0 3 0x18100080 kqread resolvd 78786 302212 35003 77 3 0x18100092 kqread dhcpleased 82065 278538 35003 77 3 0x18100092 kqread dhcpleased 35003 373481 1 0 3 0x18000080 kqread dhcpleased 4998 341827 0 0 3 0x14200 bored smr 35910 242438 0 0 2 0x14200 zerothread 62740 133379 0 0 3 0x14200 aiodoned aiodoned 64551 375003 0 0 3 0x14200 syncer update 98324 169655 0 0 3 0x14200 cleaner cleaner 82440 65799 0 0 3 0x14200 reaper reaper 18162 407450 0 0 3 0x14200 pgdaemon pagedaemon 69175 175296 0 0 3 0x14200 bored viomb 96673 344476 0 0 3 0x40014200 acpi0 acpi0 29832 78024 0 0 3 0x14200 bored softnet3 28270 208928 0 0 3 0x14200 bored softnet2 82749 302206 0 0 3 0x14200 bored softnet1 45736 461820 0 0 3 0x14200 bored softnet0 39049 316456 0 0 3 0x14200 bored systqmp 45703 424863 0 0 3 0x14200 bored systq 73458 111462 0 0 3 0x40014200 tmoslp softclock 87388 232932 0 0 3 0x40014200 idle0 1 519561 0 0 3 0x8000082 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 10171 6399K 6598K 166960K 12147 0 pcb 15 10K 10K 166960K 62 0 rtable 239 7K 7K 166960K 1184 0 pf 29 8K 9K 166960K 110 0 ifaddr 43 11K 11K 166960K 163 0 ifgroup 50 2K 2K 166960K 203 0 sysctl 4 1K 1K 166960K 5 0 counters 30 17K 17K 166960K 66 0 ioctlops 0 0K 2K 166960K 77 0 iov 0 0K 16K 166960K 54 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1370 86K 86K 166960K 2071 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 49 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 73K 166960K 1128 0 sigio 0 0K 0K 166960K 28 0 proc 58 59K 83K 166960K 1276 0 subproc 104 6K 6K 166960K 455 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 108 0 in_multi 100 7K 7K 166960K 402 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 788 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 304 94K 96K 166960K 10570 0 UVM aobj 27 2K 2K 166960K 31 0 pinsyscall 37 74K 100K 166960K 2934 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 24 0 NDP 13 0K 2K 166960K 115 0 temp 74 6808K 6887K 166960K 42457 0 kqueue 12 18K 24K 166960K 85 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 125 0 120 1 0 1 1 0 8 0 rtentry 112 412 0 301 4 0 4 4 0 8 0 unpcb 144 435 0 417 2 0 2 2 0 8 1 syncache 336 13 0 13 1 0 1 1 0 8 1 sackhl 24 1 0 1 1 0 1 1 0 8 1 tcpqe 32 4 0 4 1 0 1 1 0 8 1 tcpcb 808 231 0 223 3 0 3 3 0 8 2 arp 88 72 0 54 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 360 797 0 782 5 0 5 5 0 8 3 nd6 104 105 0 81 1 0 1 1 0 8 0 pkpcb 40 9 0 9 1 0 1 1 0 8 1 kcovpl 48 35 0 27 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1649 0 1194 39 10 29 29 0 8 0 art_table 32 1650 0 1194 4 0 4 4 0 8 0 art_node 16 409 0 309 1 0 1 1 0 8 0 sysvmsgpl 40 55 0 15 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 45 0 35 1 0 1 1 0 8 0 shmpl 112 28 0 4 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2614 0 1097 96 0 96 96 0 8 0 ffsino 240 2614 0 1097 90 0 90 90 0 8 0 nchpl 144 3934 0 2201 66 0 66 66 0 8 0 uvmvnodes 80 3297 0 0 68 0 68 68 0 8 0 vnodes 216 3297 0 0 184 0 184 184 0 8 0 namei 1024 15459 0 15458 2 0 2 2 0 8 1 vcpupl 2048 5 0 0 1 0 1 1 0 8 0 vmpool 664 6 0 1 1 0 1 1 0 8 0 kstatmem 264 94 0 72 2 0 2 2 0 8 0 scxspl 216 29865 0 29865 8 0 8 8 1 8 8 plimitpl 152 123 0 107 1 0 1 1 0 8 0 sigapl 424 1380 0 1314 8 0 8 8 0 8 0 futexpl 64 10285 0 10282 1 0 1 1 0 8 0 knotepl 120 11338 0 11256 12 1 11 11 0 8 8 kqueuepl 184 152 0 142 1 0 1 1 0 8 0 pipepl 288 302 0 274 3 0 3 3 0 8 0 fdescpl 432 1341 0 1313 4 0 4 4 0 8 0 filepl 120 6143 0 5883 9 0 9 9 0 8 1 lockfpl 104 166 0 161 1 0 1 1 0 8 0 lockfspl 48 73 0 70 1 0 1 1 0 8 0 sessionpl 144 50 0 34 1 0 1 1 0 8 0 pgrppl 48 62 0 46 1 0 1 1 0 8 0 ucredpl 104 676 0 666 1 0 1 1 0 8 0 zombiepl 144 1316 0 1314 1 0 1 1 0 8 0 processpl 1072 1380 0 1314 5 0 5 5 0 8 0 procpl 656 2192 0 2106 9 0 9 9 0 8 1 sosppl 168 20 0 20 1 0 1 1 0 8 1 sockpl 472 1373 0 1335 9 0 9 9 0 8 4 mcl64k 65536 17 0 17 1 0 1 1 0 8 1 mcl16k 16384 19 0 19 1 0 1 1 0 8 1 mcl12k 12288 25 0 25 1 0 1 1 0 8 1 mcl9k 9216 6 0 6 1 0 1 1 0 8 1 mcl8k 8192 62 0 62 1 0 1 1 0 8 1 mcl4k 4096 114 0 114 1 0 1 1 0 8 1 mcl2k2 2112 8 0 8 1 0 1 1 0 8 1 mcl2k 2048 20207 0 20103 38 18 20 38 0 8 5 mtagpl 96 36 0 30 1 0 1 1 0 8 0 mbufpl 256 41492 0 41236 69 46 23 65 0 8 5 bufpl 280 8769 0 1324 532 0 532 532 0 8 0 anonpl 24 295119 0 289290 66 0 66 66 0 188 16 amapchunkpl 152 34880 0 34193 40 0 40 40 0 158 9 amappl16 200 6362 0 6242 13 0 13 13 0 8 5 amappl15 192 14 0 12 1 0 1 1 0 8 0 amappl14 184 275 0 261 2 0 2 2 0 8 1 amappl13 176 10 0 8 1 0 1 1 0 8 0 amappl12 168 2369 0 2340 2 0 2 2 0 8 0 amappl11 160 54 0 44 1 0 1 1 0 8 0 amappl10 152 83 0 73 1 0 1 1 0 8 0 amappl9 144 134 0 134 1 0 1 1 0 8 1 amappl8 136 160 0 114 2 0 2 2 0 8 0 amappl7 128 118 0 103 1 0 1 1 0 8 0 amappl6 120 657 0 645 2 0 2 2 0 8 1 amappl5 112 285 0 273 1 0 1 1 0 8 0 amappl4 104 709 0 678 2 0 2 2 0 8 1 amappl3 96 7073 0 6987 3 0 3 3 0 8 0 amappl2 88 1845 0 1772 4 0 4 4 0 8 2 amappl1 80 14502 0 14007 22 3 19 22 0 8 8 amappl 88 9821 0 9617 6 0 6 6 0 92 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 30 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1347 0 1314 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1347 0 1314 1 0 1 1 0 8 0 vmmpekpl 168 14618 0 14563 4 0 4 4 0 8 1 vmmpepl 168 108188 0 106284 112 0 112 112 0 357 26 vmsppl 344 1346 0 1314 4 0 4 4 0 8 0 rwobjpl 24 35526 0 31117 27 0 27 27 0 8 0 pdppl 4096 2700 0 2633 176 105 71 71 0 8 4 pvpl 32 735594 0 722751 365 21 344 365 0 265 222 pmappl 216 1346 0 1314 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 529 0 179 12 0 12 12 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000dfa700,ffff8000006ab000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000dfa700) at in_delmulti+0xd3 sys/netinet/in.c:908 ip_freemoptions(ffff8000006ba7b0) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1737 in_pcbdetach(fffffd8079787000) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:606 udp_detach(fffffd806ba01200) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1139 soclose(fffffd806ba01200,0) at soclose+0x80 pru_detach sys/sys/protosw.h:283 [inline] soclose(fffffd806ba01200,0) at soclose+0x80 sys/kern/uipc_socket.c:411 soo_close(fffffd806bbdd358,ffff80002a6b67e8) at soo_close+0x44 fdrop(fffffd806bbdd358,ffff80002a6b67e8) at fdrop+0xd5 sys/kern/kern_descrip.c:1274 closef(fffffd806bbdd358,ffff80002a6b67e8) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff80002a6b67e8) at fdfree+0xe3 sys/kern/kern_descrip.c:1190 exit1(ffff80002a6b67e8,0,0,1) at exit1+0x371 sys/kern/kern_exit.c:199 sys_exit(ffff80002a6b67e8,ffff80003297d5a0,ffff80003297d4f0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80003297d5a0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77f6f0178840, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000dfa700,ffff8000006ab000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000dfa700) at in_delmulti+0xd3 sys/netinet/in.c:908 ip_freemoptions(ffff8000006ba7b0) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1737 in_pcbdetach(fffffd8079787000) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:606 udp_detach(fffffd806ba01200) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1139 soclose(fffffd806ba01200,0) at soclose+0x80 pru_detach sys/sys/protosw.h:283 [inline] soclose(fffffd806ba01200,0) at soclose+0x80 sys/kern/uipc_socket.c:411 soo_close(fffffd806bbdd358,ffff80002a6b67e8) at soo_close+0x44 fdrop(fffffd806bbdd358,ffff80002a6b67e8) at fdrop+0xd5 sys/kern/kern_descrip.c:1274 closef(fffffd806bbdd358,ffff80002a6b67e8) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff80002a6b67e8) at fdfree+0xe3 sys/kern/kern_descrip.c:1190 exit1(ffff80002a6b67e8,0,0,1) at exit1+0x371 sys/kern/kern_exit.c:199 sys_exit(ffff80002a6b67e8,ffff80003297d5a0,ffff80003297d4f0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80003297d5a0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77f6f0178840, count: -14