uvm_fault(0xfffffd806c080120, 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(ffff800000bb3800) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bb3800) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000cca5e0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd8068401870) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806a9111e0) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1249 soclose(fffffd806a9111e0,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd80677ad3d0,ffff8000215ee7e0) at soo_close+0x40 fdrop(fffffd80677ad3d0,ffff8000215ee7e0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80677ad3d0,ffff8000215ee7e0) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000215ee7e0) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000215ee7e0,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff8000215ee7e0,ffff80002e7ed530,ffff80002e7ed590) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e7ed600) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8300, 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(0xfffffd806c080120, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000bb3800) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bb3800) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000cca5e0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd8068401870) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806a9111e0) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1249 soclose(fffffd806a9111e0,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd80677ad3d0,ffff8000215ee7e0) at soo_close+0x40 fdrop(fffffd80677ad3d0,ffff8000215ee7e0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80677ad3d0,ffff8000215ee7e0) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000215ee7e0) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000215ee7e0,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff8000215ee7e0,ffff80002e7ed530,ffff80002e7ed590) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e7ed600) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8300, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002e7ed1b0 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0xd695caf1f2a3ef1c r11 0x4d00a80bd65d496b r12 0 r13 0x3 r14 0xffff8000006b5000 r15 0xffff800000bb3800 rip 0xffffffff82086650 igmp_leavegroup+0x80 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e7ed180 ss 0x10 igmp_leavegroup+0x80: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.3) pid=185860 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000215eed20,0xffffffff829e0be8 process=0xffff8000216ac7f0 user=0xffff80002e7e8000, vmspace=0xfffffd806c080120 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 63315 486205 11426 0 3 0x82 nanoslp syz-executor.2 18009 167456 11426 0 3 0x82 piperd syz-executor.0 39631 192815 11426 0 2 0x2 syz-executor.5 60718 482581 11426 0 3 0x82 nanoslp syz-executor.7 46742 305343 11426 0 3 0x82 nanoslp syz-executor.3 1949 155665 11426 0 3 0x82 piperd syz-executor.4 3017 214679 0 0 3 0x14200 bored sosplice 65413 475935 11426 0 3 0x82 piperd syz-executor.6 59877 183371 11426 0 3 0x82 nanoslp syz-executor.1 11426 481828 64479 0 3 0x82 thrsleep syz-fuzzer 11426 448382 64479 0 3 0x4000082 nanoslp syz-fuzzer 11426 129954 64479 0 3 0x4000082 kqread syz-fuzzer 11426 439912 64479 0 3 0x4000082 thrsleep syz-fuzzer 11426 341569 64479 0 3 0x4000082 thrsleep syz-fuzzer 11426 394052 64479 0 3 0x4000082 thrsleep syz-fuzzer 11426 661 64479 0 3 0x4000082 thrsleep syz-fuzzer 11426 304401 64479 0 3 0x4000082 thrsleep syz-fuzzer 11426 520169 64479 0 3 0x4000082 thrsleep syz-fuzzer 64479 71683 42769 0 3 0x10008a sigsusp ksh 42769 378999 49183 0 3 0x9a kqread sshd 45932 99404 1 0 3 0x100083 ttyin getty 49183 55726 1 0 3 0x88 kqread sshd 18158 62816 63302 73 3 0x1100090 kqread syslogd 63302 103276 1 0 3 0x100082 netio syslogd 44600 25888 1 0 3 0x100080 kqread resolvd 14721 331722 54005 77 3 0x100092 kqread dhcpleased 8741 394186 54005 77 3 0x100092 kqread dhcpleased 54005 205122 1 0 3 0x80 kqread dhcpleased 69696 135829 0 0 3 0x14200 bored smr 99649 497035 0 0 2 0x14200 zerothread 68591 384480 0 0 3 0x14200 aiodoned aiodoned 58014 347630 0 0 3 0x14200 syncer update 24290 277573 0 0 3 0x14200 cleaner cleaner 48275 43667 0 0 3 0x14200 reaper reaper 53531 123649 0 0 3 0x14200 pgdaemon pagedaemon 41549 71051 0 0 3 0x14200 bored viomb 87048 240088 0 0 3 0x40014200 acpi0 acpi0 24696 108877 0 0 3 0x14200 bored softnet 87689 49800 0 0 3 0x14200 bored systqmp 93905 62764 0 0 3 0x14200 bored systq 12412 232975 0 0 3 0x40014200 bored softclock 9519 201638 0 0 3 0x40014200 idle0 1 84355 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 10185 6543K 7244K 78643K 16601 0 pcb 13 15K 17K 78643K 277 0 rtable 179 9K 12K 78643K 3157 0 ifaddr 70 16K 18K 78643K 1074 0 counters 25 17K 17K 78643K 56 0 ioctlops 0 0K 4K 78643K 674 0 iov 0 0K 24K 78643K 157 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1394 87K 88K 78643K 3304 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 16 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 139 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 11 37K 77K 78643K 2159 0 sigio 0 0K 0K 78643K 9 0 proc 58 55K 71K 78643K 799 0 subproc 104 6K 6K 78643K 234 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 108 0 in_multi 65 4K 6K 78643K 311 0 ether_multi 1 0K 0K 78643K 27 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 2K 78643K 1071 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 285 231K 263K 78643K 27209 0 UVM aobj 61 7K 7K 78643K 64 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 110 0 NDP 9 0K 2K 78643K 84 0 temp 130 4720K 4793K 78643K 19758 0 kqueue 12 18K 26K 78643K 148 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 120 184 0 181 2 1 1 2 0 8 0 rtentry 112 264 0 193 4 0 4 4 0 8 0 unpcb 136 1736 0 1723 14 9 5 9 0 8 4 syncache 296 15 0 15 3 3 0 1 0 8 0 tcpqe 32 26 0 26 2 2 0 1 0 8 0 tcpcb 736 1715 0 1697 40 36 4 15 0 8 2 arp 88 39 0 25 1 0 1 1 0 8 0 inpcb 304 4013 0 4001 31 24 7 12 0 8 5 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 48 64 0 48 1 0 1 1 0 8 0 pkpcb 40 8 0 8 1 1 0 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 ppxss 1152 9 0 9 2 2 0 1 0 8 0 pfstscr 40 2 0 2 1 1 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 1153 0 1145 4 2 2 2 0 8 1 pftag 88 9 0 8 2 1 1 1 0 8 0 pfstkey 112 4 0 4 1 1 0 1 0 8 0 pfstate 320 2 0 2 1 1 0 1 0 8 0 pfrule 1360 293 0 265 5 2 3 4 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1111 0 821 29 7 22 29 0 8 2 art_table 32 1112 0 821 4 0 4 4 0 8 0 art_node 16 263 0 199 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 137 0 127 1 0 1 1 0 8 0 shmpl 112 61 0 3 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4156 0 2727 90 0 90 90 0 8 0 ffsino 240 4156 0 2727 85 0 85 85 0 8 0 nchpl 144 7127 0 5504 62 0 62 62 0 8 0 uvmvnodes 80 5825 0 0 119 0 119 119 0 8 0 vnodes 224 5825 0 0 343 0 343 343 0 8 0 namei 1024 26558 0 26558 3 2 1 2 0 8 1 vcpupl 1984 11 0 0 2 0 2 2 0 8 0 vmpool 528 17 0 6 1 0 1 1 0 8 0 pfiaddrpl 120 339 0 321 2 1 1 1 0 8 0 scxspl 216 20999 0 20999 11 10 1 8 0 8 1 plimitpl 152 366 0 352 1 0 1 1 0 8 0 sigapl 424 2425 0 2386 6 1 5 6 0 8 0 futexpl 64 21838 0 21838 1 0 1 1 0 8 1 knotepl 120 27281 0 27201 6 2 4 6 0 8 0 kqueuepl 184 598 0 590 7 6 1 4 0 8 0 pipepl 304 624 0 596 15 12 3 8 0 8 0 fdescpl 432 2411 0 2389 4 0 4 4 0 8 0 filepl 120 18918 0 18682 30 18 12 16 0 8 4 lockfpl 104 716 0 714 2 1 1 2 0 8 0 lockfspl 48 213 0 211 1 0 1 1 0 8 0 sessionpl 144 33 0 17 1 0 1 1 0 8 0 pgrppl 48 33 0 17 1 0 1 1 0 8 0 ucredpl 96 1919 0 1909 1 0 1 1 0 8 0 zombiepl 144 2390 0 2386 1 0 1 1 0 8 0 processpl 1000 2425 0 2386 6 0 6 6 0 8 0 procpl 672 5604 0 5557 9 3 6 7 0 8 1 sosppl 168 20 0 20 4 3 1 1 0 8 1 sockpl 448 5942 0 5914 103 91 12 30 0 8 8 mcl64k 65536 74 0 74 4 3 1 1 0 8 1 mcl16k 16384 36 0 36 5 4 1 1 0 8 1 mcl12k 12288 75 0 75 3 2 1 1 0 8 1 mcl9k 9216 25 0 25 3 3 0 1 0 8 0 mcl8k 8192 187 0 187 4 3 1 1 0 8 1 mcl4k 4096 216 0 216 4 3 1 1 0 8 1 mcl2k2 2112 20 0 20 4 4 0 1 0 8 0 mcl2k 2048 79189 0 79140 22 14 8 13 0 8 0 mtagpl 96 588 0 479 9 3 6 8 0 8 0 mbufpl 256 140734 0 140431 42 7 35 40 0 8 0 bufpl 288 7872 0 1463 458 0 458 458 0 8 0 anonpl 24 630597 0 615473 151 33 118 139 0 188 0 amapchunkpl 152 67914 0 67292 65 33 32 45 0 158 1 amappl16 200 6733 0 6073 60 24 36 47 0 8 0 amappl15 192 789 0 781 1 0 1 1 0 8 0 amappl14 184 29 0 24 1 0 1 1 0 8 0 amappl13 176 145 0 143 1 0 1 1 0 8 0 amappl12 168 17 0 13 1 0 1 1 0 8 0 amappl11 160 276 0 266 1 0 1 1 0 8 0 amappl10 152 174 0 173 1 0 1 1 0 8 0 amappl9 144 1017 0 1011 1 0 1 1 0 8 0 amappl8 136 1113 0 1053 3 0 3 3 0 8 0 amappl7 128 503 0 491 1 0 1 1 0 8 0 amappl6 120 779 0 757 2 1 1 2 0 8 0 amappl5 112 2236 0 2224 1 0 1 1 0 8 0 amappl4 104 1378 0 1349 2 0 2 2 0 8 0 amappl3 96 386 0 375 1 0 1 1 0 8 0 amappl2 88 685 0 640 3 1 2 3 0 8 0 amappl1 80 45669 0 45194 20 7 13 18 0 8 0 amappl 88 26552 0 26366 7 0 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 63 0 3 2 0 2 2 0 8 0 uaddrrnd 24 2428 0 2395 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2428 0 2395 1 0 1 1 0 8 0 vmmpekpl 168 21004 0 20951 3 0 3 3 0 8 0 vmmpepl 168 225283 0 223159 161 35 126 129 0 357 8 vmsppl 272 2427 0 2395 5 2 3 3 0 8 0 rwobjpl 24 59746 0 52345 46 0 46 46 0 8 0 pdppl 4096 4862 0 4801 199 128 71 77 0 8 10 pvpl 32 1173340 0 1154586 271 79 192 258 0 265 2 pmappl 216 2427 0 2395 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1105 0 304 25 0 25 25 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000bb3800) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bb3800) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000cca5e0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd8068401870) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806a9111e0) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1249 soclose(fffffd806a9111e0,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd80677ad3d0,ffff8000215ee7e0) at soo_close+0x40 fdrop(fffffd80677ad3d0,ffff8000215ee7e0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80677ad3d0,ffff8000215ee7e0) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000215ee7e0) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000215ee7e0,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff8000215ee7e0,ffff80002e7ed530,ffff80002e7ed590) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e7ed600) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8300, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000bb3800) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bb3800) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff800000cca5e0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd8068401870) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd806a9111e0) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1249 soclose(fffffd806a9111e0,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd80677ad3d0,ffff8000215ee7e0) at soo_close+0x40 fdrop(fffffd80677ad3d0,ffff8000215ee7e0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd80677ad3d0,ffff8000215ee7e0) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000215ee7e0) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff8000215ee7e0,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff8000215ee7e0,ffff80002e7ed530,ffff80002e7ed590) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e7ed600) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8300, count: -14