uvm_fault(0xfffffd806a308668, 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 igmp_leavegroup(ffff800000d91e00) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000d91e00) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c096a0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3b5000) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd8073d48a90) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd8073d48a90,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8069dd3a58,ffff80002e7a5a40) at soo_close+0x40 fdrop(fffffd8069dd3a58,ffff80002e7a5a40) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8069dd3a58,ffff80002e7a5a40) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80002e7a5a40) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff80002e7a5a40,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff80002e7a5a40,ffff80002e810f00,ffff80002e810f60) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e810fd0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdfe80, 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(0xfffffd806a308668, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000d91e00) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000d91e00) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c096a0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3b5000) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd8073d48a90) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd8073d48a90,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8069dd3a58,ffff80002e7a5a40) at soo_close+0x40 fdrop(fffffd8069dd3a58,ffff80002e7a5a40) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8069dd3a58,ffff80002e7a5a40) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80002e7a5a40) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff80002e7a5a40,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff80002e7a5a40,ffff80002e810f00,ffff80002e810f60) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e810fd0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdfe80, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002e810b80 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0x305386399df5578b r11 0x4eb0df9138a6c511 r12 0 r13 0x3 r14 0xffff8000006b5000 r15 0xffff800000d91e00 rip 0xffffffff81d64df0 igmp_leavegroup+0x80 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e810b50 ss 0x10 igmp_leavegroup+0x80: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.0) pid=4268 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff80002e7a42a0,0xffff80002e7a5510 process=0xffff800026d20818 user=0xffff80002e80c000, vmspace=0xfffffd806a308668 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 94287 329257 26473 0 2 0 syz-executor.3 11799 490733 70428 0 2 0 syz-executor.1 11799 307078 70428 0 2 0x4000000 syz-executor.1 77984 435498 94679 0 2 0 syz-executor.5 77984 28849 94679 0 3 0x4000080 netio syz-executor.5 64336 57409 88059 0 2 0 syz-executor.2 38526 87520 55493 0 2 0 syz-executor.4 38526 108130 55493 0 3 0x4000080 fsleep syz-executor.4 77997 5426 3368 0 2 0 syz-executor.7 77997 242555 3368 0 3 0x4000080 fsleep syz-executor.7 36328 217089 0 0 3 0x14280 nfsidl nfsio 91372 284675 0 0 3 0x14280 nfsidl nfsio 56722 12242 0 0 3 0x14280 nfsidl nfsio 26696 68972 0 0 3 0x14280 nfsidl nfsio 31154 340229 0 0 3 0x14280 nfsidl nfsio 25312 332591 0 0 3 0x14280 nfsidl nfsio 39670 481522 0 0 3 0x14280 nfsidl nfsio 77410 46165 0 0 3 0x14280 nfsidl nfsio 8970 505530 0 0 3 0x14280 nfsidl nfsio 15331 442486 0 0 3 0x14280 nfsidl nfsio 51711 173391 0 0 3 0x14280 nfsidl nfsio 17768 466559 0 0 3 0x14280 nfsidl nfsio 77985 135702 0 0 3 0x14280 nfsidl nfsio 17483 228503 0 0 3 0x14280 nfsidl nfsio 77067 431126 0 0 3 0x14280 nfsidl nfsio 2549 80274 0 0 3 0x14280 nfsidl nfsio 55229 383727 0 0 3 0x14280 nfsidl nfsio 15535 59254 0 0 3 0x14280 nfsidl nfsio 30175 358066 0 0 3 0x14280 nfsidl nfsio 66267 508274 0 0 3 0x14280 nfsidl nfsio 26473 127614 7743 0 2 0x2 syz-executor.3 94679 318826 7743 0 3 0x82 nanoslp syz-executor.5 75605 142222 0 0 3 0x14200 acct acct 50696 92536 7743 0 2 0x2 syz-executor.6 55493 203810 7743 0 3 0x82 nanoslp syz-executor.4 88059 369152 7743 0 3 0x82 nanoslp syz-executor.2 70428 73179 7743 0 3 0x82 nanoslp syz-executor.1 76870 134662 1 0 3 0x100083 ttyopn getty 93635 339675 0 0 3 0x14200 bored sosplice 3368 48164 7743 0 3 0x82 nanoslp syz-executor.7 59012 232941 7743 0 3 0x82 nanoslp syz-executor.0 7743 352728 59705 0 3 0x82 thrsleep syz-fuzzer 7743 281239 59705 0 3 0x4000082 nanoslp syz-fuzzer 7743 467296 59705 0 3 0x4000082 thrsleep syz-fuzzer 7743 456907 59705 0 3 0x4000082 kqread syz-fuzzer 7743 88322 59705 0 3 0x4000082 thrsleep syz-fuzzer 7743 256405 59705 0 3 0x4000082 thrsleep syz-fuzzer 7743 153656 59705 0 3 0x4000082 thrsleep syz-fuzzer 7743 16836 59705 0 3 0x4000082 thrsleep syz-fuzzer 59705 468047 24278 0 3 0x10008a sigsusp ksh 24278 127581 95500 0 3 0x9a poll sshd 95500 35321 1 0 3 0x88 poll sshd 54115 31363 66014 73 3 0x100090 kqread syslogd 66014 129357 1 0 3 0x100082 netio syslogd 71041 319927 1 0 3 0x100080 kqread resolvd 55755 448358 16080 77 3 0x100092 kqread dhcpleased 86611 291761 16080 77 3 0x100092 kqread dhcpleased 16080 182650 1 0 3 0x80 kqread dhcpleased 84764 28708 0 0 3 0x14200 bored smr 49654 262944 0 0 2 0x14200 zerothread 26224 135319 0 0 3 0x14200 aiodoned aiodoned 1915 376895 0 0 3 0x14200 syncer update 7245 126914 0 0 3 0x14200 cleaner cleaner 66472 93329 0 0 3 0x14200 reaper reaper 33346 91807 0 0 3 0x14200 pgdaemon pagedaemon 41238 266866 0 0 3 0x14200 bored viomb 99046 116757 0 0 3 0x40014200 acpi0 acpi0 77530 363320 0 0 3 0x14200 bored softnet 94390 375971 0 0 3 0x14200 bored systqmp 65027 334476 0 0 3 0x14200 bored systq 59907 397335 0 0 3 0x40014200 bored softclock 77835 75077 0 0 3 0x40014200 idle0 1 276567 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 10201 6468K 7264K 78643K 20562 0 pcb 13 16K 18K 78643K 1122 0 rtable 208 19K 22K 78643K 2922 0 ifaddr 99 22K 23K 78643K 1337 0 sysctl 3 1K 1K 78643K 3 0 counters 27 17K 17K 78643K 121 0 ioctlops 0 0K 4K 78643K 1357 0 iov 0 0K 28K 78643K 683 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1431 89K 90K 78643K 6341 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 70 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 737 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 85K 78643K 6610 0 sigio 0 0K 0K 78643K 45 0 proc 61 55K 79K 78643K 1078 0 subproc 104 6K 6K 78643K 331 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 3883 0 in_multi 72 5K 7K 78643K 919 0 ether_multi 2 0K 0K 78643K 222 0 mrt 1 0K 0K 78643K 32 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 199 890K 890K 78643K 199 0 exec 0 0K 2K 78643K 2499 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 427 643K 1085K 78643K 81863 0 UVM aobj 131 8K 8K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 497 0 NDP 12 0K 1K 78643K 160 0 temp 130 4695K 6231K 78643K 38775 0 kqueue 10 14K 22K 78643K 310 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 120 373 0 370 6 3 3 3 0 8 2 rtentry 112 544 0 465 4 0 4 4 0 8 0 unpcb 136 8330 0 8315 63 58 5 10 0 8 4 syncache 296 21 0 21 6 6 0 1 0 8 0 tcpqe 32 47 0 47 6 6 0 1 0 8 0 tcpcb 736 4300 0 4272 108 99 9 17 0 8 6 arp 88 68 0 56 1 0 1 1 0 8 0 ipq 40 48 0 48 5 4 1 1 0 8 1 ipqe 40 1661 0 1661 5 4 1 1 0 8 1 inpcb 304 9635 0 9624 96 90 6 12 0 8 5 rttmr 72 11 0 11 3 3 0 1 0 8 0 ip6q 72 6 0 5 3 2 1 1 0 8 0 ip6af 40 9 0 8 3 2 1 1 0 8 0 nd6 48 89 0 68 1 0 1 1 0 8 0 pkpcb 40 20 0 20 4 4 0 1 0 8 0 kcovpl 48 25 0 17 1 0 1 1 0 8 0 ppxss 1152 27 0 26 6 5 1 1 0 8 0 pfstscr 40 39 0 36 2 1 1 1 0 8 0 pfosfp 40 7 0 5 1 0 1 1 0 8 0 pfosfpen 112 7 0 3 1 0 1 1 0 8 0 pfrktable 1344 646 0 635 7 5 2 2 0 8 1 pftag 88 15 0 7 1 0 1 1 0 8 0 pfstitem 24 44 0 38 1 0 1 1 0 8 0 pfstkey 112 78 0 73 2 1 1 1 0 8 0 pfstate 320 39 0 36 2 1 1 1 0 8 0 pfrule 1360 469 0 341 17 6 11 11 0 8 0 art_heap8 4096 5 0 3 3 1 2 3 0 8 0 art_heap4 256 1716 0 1297 44 13 31 33 0 8 1 art_table 32 1721 0 1300 5 0 5 5 0 8 0 art_node 16 541 0 471 1 0 1 1 0 8 0 sysvmsgpl 40 140 0 113 1 0 1 1 0 8 0 semapl 112 735 0 725 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 11862 0 10420 91 0 91 91 0 8 0 ffsino 240 11862 0 10420 86 0 86 86 0 8 0 nchpl 144 20894 0 19274 62 0 62 62 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 83061 0 83061 5 4 1 2 0 8 1 vcpupl 1984 95 0 0 12 0 12 12 0 8 0 vmpool 528 170 0 75 7 0 7 7 0 8 0 pfiaddrpl 120 294 0 195 3 0 3 3 0 8 0 scxspl 216 57934 0 57934 20 19 1 8 0 8 1 plimitpl 152 706 0 692 1 0 1 1 0 8 0 sigapl 424 6885 0 6822 9 1 8 8 0 8 0 futexpl 64 73147 0 73145 4 3 1 1 0 8 0 knotepl 112 6664 0 6589 4 1 3 4 0 8 0 kqueuepl 184 6283 0 6269 65 62 3 9 0 8 2 pipepl 304 1302 0 1274 42 39 3 12 0 8 0 fdescpl 432 6849 0 6821 4 0 4 4 0 8 0 filepl 120 68837 0 68596 84 70 14 18 0 8 6 lockfpl 104 1858 0 1856 4 3 1 2 0 8 0 lockfspl 48 446 0 444 1 0 1 1 0 8 0 sessionpl 144 41 0 25 1 0 1 1 0 8 0 pgrppl 48 50 0 34 1 0 1 1 0 8 0 ucredpl 96 19735 0 19725 1 0 1 1 0 8 0 zombiepl 144 6823 0 6822 1 0 1 1 0 8 0 processpl 1000 6885 0 6822 10 1 9 9 0 8 0 procpl 672 16896 0 16822 17 9 8 8 0 8 1 sosppl 168 37 0 37 7 7 0 1 0 8 0 sockpl 448 18362 0 18333 404 393 11 40 0 8 7 mcl64k 65536 1842 0 1842 10 9 1 1 0 8 1 mcl16k 16384 51 0 51 13 12 1 1 0 8 1 mcl12k 12288 597 0 597 12 11 1 1 0 8 1 mcl9k 9216 83 0 83 18 17 1 1 0 8 1 mcl8k 8192 356 0 356 13 12 1 1 0 8 1 mcl4k 4096 753 0 753 10 9 1 2 0 8 1 mcl2k2 2112 46 0 46 13 12 1 1 0 8 1 mcl2k 2048 92114 0 91997 25 9 16 16 0 8 0 mtagpl 96 834 0 678 8 4 4 5 0 8 0 mbufpl 256 207059 0 206627 82 52 30 53 0 8 1 bufpl 288 14687 0 8279 459 1 458 459 0 8 0 anonpl 24 1932423 0 1912863 261 116 145 158 0 188 10 amapchunkpl 152 241742 0 240926 697 658 39 658 0 158 1 amappl16 200 21699 0 20999 133 87 46 50 0 8 8 amappl15 192 1385 0 1378 1 0 1 1 0 8 0 amappl14 184 291 0 286 2 1 1 1 0 8 0 amappl13 176 1320 0 1318 1 0 1 1 0 8 0 amappl12 168 1106 0 1100 2 1 1 1 0 8 0 amappl11 160 66 0 56 1 0 1 1 0 8 0 amappl10 152 1195 0 1191 1 0 1 1 0 8 0 amappl9 144 1453 0 1445 1 0 1 1 0 8 0 amappl8 136 1653 0 1565 4 0 4 4 0 8 0 amappl7 128 795 0 786 1 0 1 1 0 8 0 amappl6 120 1235 0 1210 2 1 1 2 0 8 0 amappl5 112 6685 0 6668 1 0 1 1 0 8 0 amappl4 104 1507 0 1476 2 0 2 2 0 8 0 amappl3 96 1688 0 1672 1 0 1 1 0 8 0 amappl2 88 3195 0 3136 3 1 2 3 0 8 0 amappl1 80 121760 0 121204 18 5 13 18 0 8 0 amappl 88 80947 0 80668 9 2 7 8 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 7019 0 6896 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7019 0 6896 1 0 1 1 0 8 0 vmmpekpl 168 50713 0 50646 4 0 4 4 0 8 0 vmmpepl 168 631096 0 628209 249 99 150 153 0 357 18 vmsppl 272 7018 0 6896 11 2 9 9 0 8 0 rwobjpl 24 154062 0 146300 51 2 49 49 0 8 0 pdppl 4096 14044 0 13887 478 319 159 161 0 8 2 pvpl 32 3263322 0 3239534 435 203 232 269 0 265 22 pmappl 216 7018 0 6896 7 0 7 7 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1865 0 943 27 0 27 27 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000d91e00) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000d91e00) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c096a0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3b5000) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd8073d48a90) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd8073d48a90,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8069dd3a58,ffff80002e7a5a40) at soo_close+0x40 fdrop(fffffd8069dd3a58,ffff80002e7a5a40) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8069dd3a58,ffff80002e7a5a40) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80002e7a5a40) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff80002e7a5a40,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff80002e7a5a40,ffff80002e810f00,ffff80002e810f60) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e810fd0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdfe80, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000d91e00) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000d91e00) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c096a0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3b5000) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd8073d48a90) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd8073d48a90,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8069dd3a58,ffff80002e7a5a40) at soo_close+0x40 fdrop(fffffd8069dd3a58,ffff80002e7a5a40) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8069dd3a58,ffff80002e7a5a40) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80002e7a5a40) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff80002e7a5a40,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff80002e7a5a40,ffff80002e810f00,ffff80002e810f60) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e810fd0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdfe80, count: -14