uvm_fault(0xfffffd80624ea560, 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(ffff800000eeb000) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000eeb000) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c39090) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3b39c0) at in_pcbdetach+0xfc sys/netinet/in_pcb.c:585 udp_detach(fffffd806e4d0010) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1258 soclose(fffffd806e4d0010,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd8067ca5a68,ffff8000216b1a48) at soo_close+0x40 fdrop(fffffd8067ca5a68,ffff8000216b1a48) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8067ca5a68,ffff8000216b1a48) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000216b1a48) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000216b1a48,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff8000216b1a48,ffff800028229980,ffff8000282299e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800028229a50) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc5a60, 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(0xfffffd80624ea560, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000eeb000) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000eeb000) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c39090) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3b39c0) at in_pcbdetach+0xfc sys/netinet/in_pcb.c:585 udp_detach(fffffd806e4d0010) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1258 soclose(fffffd806e4d0010,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd8067ca5a68,ffff8000216b1a48) at soo_close+0x40 fdrop(fffffd8067ca5a68,ffff8000216b1a48) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8067ca5a68,ffff8000216b1a48) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000216b1a48) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000216b1a48,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff8000216b1a48,ffff800028229980,ffff8000282299e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800028229a50) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc5a60, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff800028229600 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0x1b3b1d2c2067d77b r11 0x88e5c92135911968 r12 0 r13 0x3 r14 0xffff8000006b5000 r15 0xffff800000eeb000 rip 0xffffffff818e6b70 igmp_leavegroup+0x80 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000282295d0 ss 0x10 igmp_leavegroup+0x80: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.1) pid=29498 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff8000216b07e8,0xffff8000216b0558 process=0xffff8000281f0438 user=0xffff800028224000, vmspace=0xfffffd80624ea560 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 49841 449339 44410 0 2 0 syz-executor.4 49841 399891 44410 0 3 0x4000080 fsleep syz-executor.4 54653 251961 79902 0 2 0 syz-executor.0 54653 494127 79902 0 3 0x4000080 fsleep syz-executor.0 90800 9502 15710 0 2 0 syz-executor.2 90800 293481 15710 0 3 0x4000080 fsleep syz-executor.2 59754 430234 12850 0 3 0x80 nanoslp syz-executor.5 59754 133823 12850 0 3 0x4000080 fsleep syz-executor.5 64187 215600 25000 0 2 0 syz-executor.3 80791 312404 42370 0 2 0x482 syz-executor.6 60454 411105 42370 0 2 0x482 syz-executor.1 25000 352113 42370 0 3 0x82 nanoslp syz-executor.3 65442 187436 0 0 3 0x14280 nfsidl nfsio 34009 223641 0 0 3 0x14280 nfsidl nfsio 68112 7582 0 0 3 0x14280 nfsidl nfsio 66 56617 0 0 3 0x14280 nfsidl nfsio 71543 512024 0 0 3 0x14280 nfsidl nfsio 35935 261979 0 0 3 0x14280 nfsidl nfsio 8001 374799 0 0 3 0x14280 nfsidl nfsio 34338 436018 0 0 3 0x14280 nfsidl nfsio 53445 107933 0 0 3 0x14280 nfsidl nfsio 60738 309358 0 0 3 0x14280 nfsidl nfsio 87365 499273 0 0 3 0x14280 nfsidl nfsio 35739 115901 0 0 3 0x14280 nfsidl nfsio 99729 6700 0 0 3 0x14280 nfsidl nfsio 94399 280063 0 0 3 0x14280 nfsidl nfsio 83804 373003 0 0 3 0x14280 nfsidl nfsio 45860 14686 0 0 3 0x14280 nfsidl nfsio 54792 107458 0 0 3 0x14280 nfsidl nfsio 22439 364997 0 0 3 0x14280 nfsidl nfsio 33135 29475 0 0 3 0x14280 nfsidl nfsio 31772 441519 0 0 3 0x14280 nfsidl nfsio 79902 463902 42370 0 2 0x482 syz-executor.0 56961 56988 42370 0 2 0x2 syz-executor.7 77806 435942 0 0 3 0x14200 acct acct 44410 95347 42370 0 2 0x482 syz-executor.4 15710 31180 42370 0 2 0x482 syz-executor.2 12850 18721 42370 0 3 0x82 nanoslp syz-executor.5 22211 299470 1 0 3 0x100083 ttyin getty 34548 65507 0 0 3 0x14200 bored sosplice 42370 348141 4821 0 3 0x82 thrsleep syz-fuzzer 42370 323737 4821 0 3 0x4000082 nanoslp syz-fuzzer 42370 371178 4821 0 3 0x4000082 thrsleep syz-fuzzer 42370 81080 4821 0 3 0x4000082 thrsleep syz-fuzzer 42370 470481 4821 0 3 0x4000082 thrsleep syz-fuzzer 42370 421363 4821 0 3 0x4000082 thrsleep syz-fuzzer 42370 372311 4821 0 3 0x4000082 kqread syz-fuzzer 42370 25450 4821 0 3 0x4000082 thrsleep syz-fuzzer 42370 448800 4821 0 3 0x4000082 thrsleep syz-fuzzer 4821 57907 35900 0 3 0x10008a sigsusp ksh 35900 346783 81956 0 3 0x9a kqread sshd 81956 403651 1 0 3 0x88 kqread sshd 62938 74428 33433 73 3 0x1100090 kqread syslogd 33433 460199 1 0 3 0x100082 netio syslogd 43928 36523 1 0 3 0x100080 kqread resolvd 76970 439392 75051 77 3 0x100092 kqread dhcpleased 96946 172136 75051 77 3 0x100092 kqread dhcpleased 75051 502061 1 0 3 0x80 kqread dhcpleased 73662 489694 0 0 3 0x14200 bored smr 29836 100889 0 0 2 0x14200 zerothread 10826 428382 0 0 3 0x14200 aiodoned aiodoned 42182 412148 0 0 3 0x14200 syncer update 46867 514791 0 0 3 0x14200 cleaner cleaner 67304 184216 0 0 3 0x14200 reaper reaper 1567 221774 0 0 3 0x14200 pgdaemon pagedaemon 62383 366452 0 0 3 0x14200 bored viomb 92436 438484 0 0 3 0x40014200 acpi0 acpi0 14769 277151 0 0 3 0x14200 bored softnet 37295 6658 0 0 3 0x14200 bored systqmp 33976 264985 0 0 3 0x14200 bored systq 26738 316071 0 0 2 0x40014200 softclock 76153 268189 0 0 3 0x40014200 idle0 1 313239 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 10231 6576K 7554K 78643K 74180 0 pcb 13 18K 20K 78643K 3839 0 rtable 201 15K 26K 78643K 8613 0 ifaddr 98 27K 30K 78643K 4180 0 sysctl 3 1K 1K 78643K 3 0 counters 27 17K 17K 78643K 448 0 ioctlops 0 0K 4K 78643K 6915 0 iov 0 0K 32K 78643K 3198 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1595 100K 100K 78643K 32182 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 201 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 3255 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 81K 78643K 26088 0 sigio 0 0K 0K 78643K 173 0 proc 71 55K 79K 78643K 4626 0 subproc 104 6K 7K 78643K 1548 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 1437 0 in_multi 71 4K 7K 78643K 2030 0 ether_multi 1 0K 0K 78643K 235 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 277 1235K 1235K 78643K 277 0 exec 0 0K 2K 78643K 6665 0 pfkey data 0 0K 1K 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 7 26K 26K 78643K 7 0 UVM amap 767 2211K 2787K 78643K 313980 0 UVM aobj 131 7K 7K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1335 0 NDP 14 0K 1K 78643K 696 0 temp 159 4749K 70241K 78643K 270481 0 kqueue 12 18K 30K 78643K 2647 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 1697 0 1694 19 18 1 3 0 8 0 rtentry 112 1729 0 1652 6 3 3 4 0 8 0 unpcb 136 13403 0 13390 154 153 1 9 0 8 0 syncache 296 118 0 118 35 35 0 1 0 8 0 tcpqe 32 45 0 45 17 17 0 1 0 8 0 tcpcb 736 12579 0 12560 441 439 2 19 0 8 0 arp 88 290 0 275 1 0 1 1 0 8 0 ipq 40 130 0 130 13 13 0 1 0 8 0 ipqe 40 331 0 331 13 13 0 1 0 8 0 inpcb 312 33728 0 33712 505 501 4 17 0 8 2 rttmr 72 25 0 25 9 9 0 1 0 8 0 ip6q 72 20 0 20 7 7 0 1 0 8 0 ip6af 40 83 0 83 7 7 0 1 0 8 0 nd6 48 421 0 404 1 0 1 1 0 8 0 pkpcb 40 147 0 147 18 18 0 1 0 8 0 kcovpl 48 118 0 110 1 0 1 1 0 8 0 ppxss 1152 145 0 145 16 16 0 1 0 8 0 pfstscr 40 135 0 133 1 0 1 1 0 8 0 pfosfp 40 12 0 10 1 0 1 1 0 8 0 pfosfpen 112 12 0 6 1 0 1 1 0 8 0 pfrktable 1344 1526 0 1526 14 14 0 2 0 8 0 pftag 88 25 0 13 1 0 1 1 0 8 0 pfqueue 264 71 0 71 2 2 0 1 0 8 0 pfstitem 24 223 0 207 1 0 1 1 0 8 0 pfstkey 112 270 0 264 2 1 1 1 0 8 0 pfstate 320 145 0 137 2 1 1 1 0 8 0 pfrule 1360 1674 0 1674 26 25 1 5 0 8 1 art_heap8 4096 3 0 2 3 2 1 2 0 8 0 art_heap4 256 7551 0 7217 75 54 21 32 0 8 0 art_table 32 7554 0 7219 7 3 4 5 0 8 0 art_node 16 1728 0 1663 1 0 1 1 0 8 0 sysvmsgpl 40 23 0 9 1 0 1 1 0 8 0 semapl 112 3253 0 3243 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 48647 0 47069 99 0 99 99 0 8 0 ffsino 240 48647 0 47069 94 0 94 94 0 8 0 nchpl 144 82994 0 81368 62 0 62 62 0 8 0 uvmvnodes 80 6242 0 0 128 0 128 128 0 8 0 vnodes 224 6242 0 0 368 0 368 368 0 8 0 namei 1024 333486 0 333486 4 3 1 2 0 8 1 vcpupl 1984 404 0 0 51 0 51 51 0 8 0 vmpool 528 512 0 108 31 4 27 27 0 8 0 pfiaddrpl 120 568 0 568 7 7 0 2 0 8 0 scsiplug 72 14 0 14 5 5 0 1 0 8 0 scxspl 216 205596 0 205596 54 53 1 8 0 8 1 plimitpl 152 2874 0 2860 1 0 1 1 0 8 0 sigapl 424 26212 0 26149 11 3 8 8 0 8 0 futexpl 64 257549 0 257545 2 1 1 1 0 8 0 knotepl 120 634378 0 634298 150 143 7 15 0 8 3 kqueuepl 184 6450 0 6442 96 95 1 6 0 8 0 pipepl 304 5295 0 5267 134 131 3 9 0 8 0 fdescpl 432 26134 0 26107 4 0 4 4 0 8 0 filepl 120 235826 0 235577 312 302 10 20 0 8 2 lockfpl 104 7164 0 7162 17 16 1 2 0 8 0 lockfspl 48 1818 0 1816 1 0 1 1 0 8 0 sessionpl 144 138 0 122 1 0 1 1 0 8 0 pgrppl 48 336 0 320 1 0 1 1 0 8 0 ucredpl 96 77849 0 77837 1 0 1 1 0 8 0 zombiepl 144 26151 0 26149 6 5 1 1 0 8 0 processpl 1000 26212 0 26149 11 2 9 9 0 8 0 procpl 672 64727 0 64652 20 12 8 9 0 8 0 sosppl 168 137 0 137 27 27 0 1 0 8 0 sockpl 448 49166 0 49137 1015 1008 7 40 0 8 3 mcl64k 65536 1054 0 1054 80 79 1 1 0 8 1 mcl16k 16384 166 0 166 60 60 0 1 0 8 0 mcl12k 12288 881 0 881 77 76 1 1 0 8 1 mcl9k 9216 510 0 510 75 75 0 1 0 8 0 mcl8k 8192 1652 0 1652 67 66 1 1 0 8 1 mcl4k 4096 2676 0 2676 34 33 1 1 0 8 1 mcl2k2 2112 194 0 194 86 86 0 1 0 8 0 mcl2k 2048 130152 0 130076 80 67 13 22 0 8 0 mtagpl 96 11118 0 10155 79 52 27 29 0 8 0 mbufpl 256 395407 0 394128 644 559 85 281 0 8 0 bufpl 288 51372 0 45100 460 4 456 459 0 8 0 anonpl 24 7278823 0 7254790 482 310 172 181 0 188 10 amapchunkpl 152 1400097 0 1399143 1836 1643 193 663 0 158 153 amappl16 200 74053 0 73047 319 255 64 67 0 8 8 amappl15 192 5497 0 5490 1 0 1 1 0 8 0 amappl14 184 1137 0 1133 1 0 1 1 0 8 0 amappl13 176 2254 0 2251 1 0 1 1 0 8 0 amappl12 168 2543 0 2538 1 0 1 1 0 8 0 amappl11 160 4175 0 4164 1 0 1 1 0 8 0 amappl10 152 2351 0 2345 1 0 1 1 0 8 0 amappl9 144 4757 0 4755 1 0 1 1 0 8 0 amappl8 136 7419 0 7268 6 0 6 6 0 8 0 amappl7 128 4892 0 4874 1 0 1 1 0 8 0 amappl6 120 4837 0 4809 3 2 1 2 0 8 0 amappl5 112 23181 0 23165 1 0 1 1 0 8 0 amappl4 104 11131 0 11100 2 0 2 2 0 8 0 amappl3 96 4776 0 4757 1 0 1 1 0 8 0 amappl2 88 5403 0 5332 3 1 2 3 0 8 0 amappl1 80 455922 0 455380 20 7 13 18 0 8 0 amappl 88 310974 0 310592 11 1 10 10 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 26646 0 26215 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 26646 0 26215 3 0 3 3 0 8 0 vmmpekpl 168 166261 0 166171 5 0 5 5 0 8 0 vmmpepl 168 2380655 0 2376873 800 617 183 198 0 357 5 vmsppl 272 26645 0 26215 33 4 29 29 0 8 0 rwobjpl 24 550642 0 542086 67 13 54 54 0 8 1 pdppl 4096 53298 0 52834 2125 1657 468 469 0 8 4 pvpl 32 11960041 0 11937721 790 573 217 258 0 265 9 pmappl 216 26645 0 26215 27 2 25 25 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 5851 0 4563 48 9 39 43 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000eeb000) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000eeb000) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c39090) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3b39c0) at in_pcbdetach+0xfc sys/netinet/in_pcb.c:585 udp_detach(fffffd806e4d0010) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1258 soclose(fffffd806e4d0010,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd8067ca5a68,ffff8000216b1a48) at soo_close+0x40 fdrop(fffffd8067ca5a68,ffff8000216b1a48) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8067ca5a68,ffff8000216b1a48) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000216b1a48) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000216b1a48,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff8000216b1a48,ffff800028229980,ffff8000282299e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800028229a50) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc5a60, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000eeb000) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000eeb000) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c39090) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3b39c0) at in_pcbdetach+0xfc sys/netinet/in_pcb.c:585 udp_detach(fffffd806e4d0010) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1258 soclose(fffffd806e4d0010,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd8067ca5a68,ffff8000216b1a48) at soo_close+0x40 fdrop(fffffd8067ca5a68,ffff8000216b1a48) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8067ca5a68,ffff8000216b1a48) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000216b1a48) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000216b1a48,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff8000216b1a48,ffff800028229980,ffff8000282299e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800028229a50) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc5a60, count: -14