uvm_fault(0xfffffd8072192668, 0x4, 0, 1) -> e kernel: page fault trap, code=0 Stopped at igmp_leavegroup+0x81: movl 0x4(%rax),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND igmp_leavegroup(ffff800000cb5a00) at igmp_leavegroup+0x81 sys/netinet/igmp.c:531 in_delmulti(ffff800000cb5a00) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c15430) at ip_freemoptions+0x5a sys/netinet/ip_output.c:1758 in_pcbdetach(fffffd806f3d5980) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806f0b61c8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd806f0b61c8,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8064ab5a50,ffff8000216cb260) at soo_close+0x40 fdrop(fffffd8064ab5a50,ffff8000216cb260) at fdrop+0xc5 sys/kern/kern_descrip.c:1279 closef(fffffd8064ab5a50,ffff8000216cb260) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000216cb260) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000216cb260,0,0,1) at exit1+0x345 sys/kern/kern_exit.c:202 sys_exit(ffff8000216cb260,ffff8000249cd3f0,ffff8000249cd450) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000249cd4c0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcc9f0, 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(0xfffffd8072192668, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000cb5a00) at igmp_leavegroup+0x81 sys/netinet/igmp.c:531 in_delmulti(ffff800000cb5a00) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c15430) at ip_freemoptions+0x5a sys/netinet/ip_output.c:1758 in_pcbdetach(fffffd806f3d5980) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806f0b61c8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd806f0b61c8,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8064ab5a50,ffff8000216cb260) at soo_close+0x40 fdrop(fffffd8064ab5a50,ffff8000216cb260) at fdrop+0xc5 sys/kern/kern_descrip.c:1279 closef(fffffd8064ab5a50,ffff8000216cb260) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000216cb260) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000216cb260,0,0,1) at exit1+0x345 sys/kern/kern_exit.c:202 sys_exit(ffff8000216cb260,ffff8000249cd3f0,ffff8000249cd450) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000249cd4c0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcc9f0, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000249cd070 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0xffffffff81df64b2 sounlock+0x32 r9 0x5 r10 0x66de3f86197643a7 r11 0xad69c41d43b5fdc2 r12 0 r13 0x3 r14 0xffff8000006ac000 r15 0xffff800000cb5a00 rip 0xffffffff81d3bd81 igmp_leavegroup+0x81 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000249cd040 ss 0x10 igmp_leavegroup+0x81: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.1) pid=208303 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000216ca000,0xffffffff828fcf08 process=0xffff8000216fe038 user=0xffff8000249c8000, vmspace=0xfffffd8072192668 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 60274 329807 37630 0 2 0x2 syz-executor.0 80503 468664 37630 0 3 0x82 nanoslp syz-executor.1 7660 49200 0 0 3 0x14200 acct acct 19414 521966 1 0 3 0x100083 ttyin getty 12822 426072 0 0 3 0x14280 nfsidl nfsio 53888 487307 0 0 3 0x14280 nfsidl nfsio 3134 73092 0 0 3 0x14280 nfsidl nfsio 30055 432229 0 0 3 0x14280 nfsidl nfsio 74017 265959 0 0 3 0x14280 nfsidl nfsio 57827 299615 0 0 3 0x14280 nfsidl nfsio 86344 70979 0 0 3 0x14280 nfsidl nfsio 6008 44988 0 0 3 0x14280 nfsidl nfsio 42300 201586 0 0 3 0x14280 nfsidl nfsio 26206 22712 0 0 3 0x14280 nfsidl nfsio 46697 277794 0 0 3 0x14280 nfsidl nfsio 59616 298245 0 0 3 0x14280 nfsidl nfsio 24604 523050 0 0 3 0x14280 nfsidl nfsio 93893 429085 0 0 3 0x14280 nfsidl nfsio 74496 279782 0 0 3 0x14280 nfsidl nfsio 71137 96077 0 0 3 0x14280 nfsidl nfsio 4745 12177 0 0 3 0x14280 nfsidl nfsio 49246 82744 0 0 3 0x14280 nfsidl nfsio 32121 466715 0 0 3 0x14280 nfsidl nfsio 9942 318728 0 0 3 0x14280 nfsidl nfsio 34519 370650 0 0 3 0x14200 bored sosplice 37630 297936 7771 0 3 0x82 thrsleep syz-fuzzer 37630 107381 7771 0 3 0x4000082 nanoslp syz-fuzzer 37630 153630 7771 0 3 0x4000082 thrsleep syz-fuzzer 37630 249678 7771 0 3 0x4000082 thrsleep syz-fuzzer 37630 498198 7771 0 3 0x4000082 thrsleep syz-fuzzer 37630 78374 7771 0 3 0x4000082 kqread syz-fuzzer 37630 20674 7771 0 3 0x4000082 thrsleep syz-fuzzer 7771 229942 77212 0 3 0x10008a sigsusp ksh 77212 508179 97146 0 3 0x9a kqread sshd 97146 298107 1 0 3 0x88 kqread sshd 59333 222301 22163 73 3 0x100090 kqread syslogd 22163 497195 1 0 3 0x100082 netio syslogd 59424 17463 1 0 3 0x100080 kqread resolvd 17654 229891 15765 77 3 0x100092 kqread dhcpleased 77155 253131 15765 77 3 0x100092 kqread dhcpleased 15765 485990 1 0 3 0x80 kqread dhcpleased 81134 151596 0 0 3 0x14200 bored smr 10953 297029 0 0 2 0x14200 zerothread 12113 383686 0 0 3 0x14200 aiodoned aiodoned 69921 82389 0 0 3 0x14200 syncer update 47081 269436 0 0 3 0x14200 cleaner cleaner 39497 71953 0 0 3 0x14200 reaper reaper 72530 209572 0 0 3 0x14200 pgdaemon pagedaemon 52137 257956 0 0 3 0x14200 bored viomb 28162 153557 0 0 3 0x40014200 acpi0 acpi0 47684 345925 0 0 3 0x14200 bored softnet 87861 499597 0 0 3 0x14200 bored systqmp 85774 343547 0 0 3 0x14200 bored systq 73384 282339 0 0 3 0x40014200 bored softclock 17964 451282 0 0 3 0x40014200 idle0 1 144164 0 0 3 0x80082 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 10142 6388K 18855K 78643K 51898 0 pcb 13 24K 34K 78643K 4112 0 rtable 77 11K 13K 78643K 4567 0 ifaddr 38 17K 23K 78643K 1804 0 sysctl 2 0K 0K 78643K 2 0 counters 20 16K 17K 78643K 358 0 ioctlops 0 0K 4K 78643K 5074 0 iov 0 0K 32K 78643K 2479 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1383 87K 87K 78643K 15122 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 175 0 VM map 2 0K 0K 78643K 2 0 sem 11 1K 1K 78643K 11 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 22255 0 sigio 1 0K 0K 78643K 2404 0 proc 71 55K 71K 78643K 2767 0 subproc 26 1K 1K 78643K 926 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 4 0K 0K 78643K 24500 0 in_multi 21 1K 2K 78643K 7572 0 ether_multi 1 0K 0K 78643K 406 0 mrt 1 0K 0K 78643K 79 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 4109 0 pfkey data 0 0K 1K 78643K 3 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 454 1203K 1205K 78643K 269657 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 1720 0 NDP 5 0K 0K 78643K 517 0 temp 77 4189K 6238K 78643K 177407 0 kqueue 17 20K 25K 78643K 2325 0 SYN cache 2 0K 16K 78643K 4 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 1658 0 1655 23 22 1 3 0 8 0 rtentry 112 1244 0 1220 3 1 2 2 0 8 0 unpcb 128 18869 0 18856 163 162 1 9 0 8 0 syncache 296 105 0 105 32 32 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 30 454 30 2 2 0 1 0 8 0 tcpcb 736 8004 0 7931 294 287 7 13 0 8 0 arp 88 188 0 184 1 0 1 1 0 8 0 ipq 40 271 0 271 29 29 0 1 0 8 0 ipqe 40 2615 0 2615 29 29 0 1 0 8 0 inpcb 304 39509 0 39496 434 427 7 19 0 8 6 rttmr 72 59 0 59 8 8 0 1 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 3 0 3 1 1 0 1 0 8 0 nd6 48 275 0 271 4 3 1 1 0 8 0 pkpcb 40 162 0 162 18 18 0 1 0 8 0 kcovpl 48 71 0 69 1 0 1 1 0 8 0 ppxss 1152 126 0 126 36 36 0 1 0 8 0 pfosfp 40 3 0 2 1 0 1 1 0 8 0 pfosfpen 112 3 0 2 1 0 1 1 0 8 0 pfrktable 1344 145 0 144 2 1 1 1 0 8 0 pftag 88 33 0 31 2 1 1 1 0 8 0 pfrule 1360 155 0 140 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 5096 0 4983 61 50 11 15 0 8 1 art_table 32 5097 0 4983 2 0 2 2 0 8 0 art_node 16 1240 0 1222 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semapl 112 9 0 0 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 31587 0 30135 94 2 92 92 0 8 0 ffsino 240 31587 0 30135 86 0 86 86 0 8 0 nchpl 144 60655 0 59063 60 0 60 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 219388 0 219388 10 9 1 1 0 8 1 vcpupl 1984 153 0 0 20 0 20 20 0 8 0 vmpool 528 217 0 64 12 1 11 11 0 8 0 pfiaddrpl 120 41 0 41 4 4 0 1 0 8 0 scsiplug 72 21 0 21 7 7 0 1 0 8 0 scxspl 216 191548 0 191548 53 52 1 8 0 8 1 plimitpl 152 3268 0 3260 1 0 1 1 0 8 0 sigapl 424 22304 0 22253 6 0 6 6 0 8 0 futexpl 64 239487 0 239487 10 9 1 1 0 8 1 knotepl 112 168430 0 168387 2 0 2 2 0 8 0 kqueuepl 184 12812 0 12792 200 197 3 8 0 8 2 pipepl 304 4979 0 4968 163 162 1 7 0 8 0 fdescpl 432 22263 0 22247 12 10 2 3 0 8 0 filepl 120 187669 0 187560 298 290 8 13 0 8 4 lockfpl 104 7022 0 7020 11 10 1 2 0 8 0 lockfspl 48 1827 0 1825 1 0 1 1 0 8 0 sessionpl 144 87 0 77 1 0 1 1 0 8 0 pgrppl 48 164 0 154 1 0 1 1 0 8 0 ucredpl 96 22097 0 22087 1 0 1 1 0 8 0 zombiepl 144 22254 0 22253 3 2 1 1 0 8 0 processpl 1000 22304 0 22253 8 1 7 7 0 8 0 procpl 672 56192 0 56135 55 49 6 7 0 8 0 sosppl 168 163 0 162 28 27 1 1 0 8 0 sockpl 448 60221 0 60192 1042 1031 11 37 0 8 7 mcl64k 65536 1274 0 1273 62 61 1 1 0 8 0 mcl16k 16384 295 0 295 64 63 1 1 0 8 1 mcl12k 12288 794 0 794 73 72 1 1 0 8 1 mcl9k 9216 340 0 340 67 66 1 1 0 8 1 mcl8k 8192 1971 0 1904 62 53 9 9 0 8 0 mcl4k 4096 2656 0 2656 39 38 1 1 0 8 1 mcl2k2 2112 180 0 180 66 66 0 1 0 8 0 mcl2k 2048 128974 0 128924 46 38 8 12 0 8 0 mtagpl 96 2770 0 2748 46 42 4 6 0 8 2 mbufpl 256 493972 0 493682 1733 1702 31 509 0 8 8 bufpl 280 43341 0 36942 458 0 458 458 0 8 0 anonpl 24 6249378 0 6231655 478 343 135 137 0 188 17 amapchunkpl 152 696273 0 695642 269 242 27 40 0 158 1 amappl16 200 64949 0 64225 314 267 47 51 0 8 8 amappl15 192 2516 0 2509 1 0 1 1 0 8 0 amappl14 184 2544 0 2542 1 0 1 1 0 8 0 amappl13 176 1637 0 1635 2 1 1 1 0 8 0 amappl12 168 3641 0 3640 1 0 1 1 0 8 0 amappl11 160 5375 0 5361 1 0 1 1 0 8 0 amappl10 152 3152 0 3152 10 10 0 1 0 8 0 amappl9 144 1882 0 1880 1 0 1 1 0 8 0 amappl8 136 4379 0 4309 3 0 3 3 0 8 0 amappl7 128 3064 0 3057 1 0 1 1 0 8 0 amappl6 120 1982 0 1966 1 0 1 1 0 8 0 amappl5 112 20622 0 20602 1 0 1 1 0 8 0 amappl4 104 11440 0 11414 1 0 1 1 0 8 0 amappl3 96 5618 0 5602 1 0 1 1 0 8 0 amappl2 88 25572 0 25510 2 0 2 2 0 8 0 amappl1 80 373111 0 372699 25 15 10 12 0 8 0 amappl 88 267812 0 267585 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 64 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 22480 0 22311 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 22480 0 22311 2 0 2 2 0 8 0 vmmpekpl 168 144041 0 143995 5 2 3 3 0 8 0 vmmpepl 168 2026040 0 2023707 1110 974 136 137 0 357 26 vmsppl 272 22479 0 22311 14 2 12 12 0 8 0 rwobjpl 24 469980 0 468439 25 14 11 11 0 8 1 pdppl 4096 44966 0 44775 277 84 193 195 0 8 2 pvpl 32 10350934 0 10330439 821 616 205 238 0 265 27 pmappl 192 22479 0 22311 10 1 9 9 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 3894 0 3423 49 35 14 26 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000cb5a00) at igmp_leavegroup+0x81 sys/netinet/igmp.c:531 in_delmulti(ffff800000cb5a00) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c15430) at ip_freemoptions+0x5a sys/netinet/ip_output.c:1758 in_pcbdetach(fffffd806f3d5980) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806f0b61c8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd806f0b61c8,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8064ab5a50,ffff8000216cb260) at soo_close+0x40 fdrop(fffffd8064ab5a50,ffff8000216cb260) at fdrop+0xc5 sys/kern/kern_descrip.c:1279 closef(fffffd8064ab5a50,ffff8000216cb260) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000216cb260) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000216cb260,0,0,1) at exit1+0x345 sys/kern/kern_exit.c:202 sys_exit(ffff8000216cb260,ffff8000249cd3f0,ffff8000249cd450) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000249cd4c0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcc9f0, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000cb5a00) at igmp_leavegroup+0x81 sys/netinet/igmp.c:531 in_delmulti(ffff800000cb5a00) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000c15430) at ip_freemoptions+0x5a sys/netinet/ip_output.c:1758 in_pcbdetach(fffffd806f3d5980) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806f0b61c8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd806f0b61c8,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8064ab5a50,ffff8000216cb260) at soo_close+0x40 fdrop(fffffd8064ab5a50,ffff8000216cb260) at fdrop+0xc5 sys/kern/kern_descrip.c:1279 closef(fffffd8064ab5a50,ffff8000216cb260) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000216cb260) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000216cb260,0,0,1) at exit1+0x345 sys/kern/kern_exit.c:202 sys_exit(ffff8000216cb260,ffff8000249cd3f0,ffff8000249cd450) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000249cd4c0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcc9f0, count: -14