uvm_fault(0xfffffd8074bdc110, 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(ffff800000c03180) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c03180) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c64da0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd807e8e4d30) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:580 udp_detach(fffffd806a7828e8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1249 soclose(fffffd806a7828e8,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd8069eeccc0,ffff800024ac4548) at soo_close+0x40 fdrop(fffffd8069eeccc0,ffff800024ac4548) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8069eeccc0,ffff800024ac4548) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff800024ac4548) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff800024ac4548,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff800024ac4548,ffff80002e7cf790,ffff80002e7cf7f0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e7cf860) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff39b0, 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(0xfffffd8074bdc110, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000c03180) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c03180) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c64da0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd807e8e4d30) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:580 udp_detach(fffffd806a7828e8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1249 soclose(fffffd806a7828e8,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd8069eeccc0,ffff800024ac4548) at soo_close+0x40 fdrop(fffffd8069eeccc0,ffff800024ac4548) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8069eeccc0,ffff800024ac4548) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff800024ac4548) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff800024ac4548,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff800024ac4548,ffff80002e7cf790,ffff80002e7cf7f0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e7cf860) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff39b0, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002e7cf410 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0x115096b16b689d89 r11 0x654b37886621acbc r12 0 r13 0x3 r14 0xffff8000006b5000 r15 0xffff800000c03180 rip 0xffffffff812be800 igmp_leavegroup+0x80 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e7cf3e0 ss 0x10 igmp_leavegroup+0x80: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.5) pid=511911 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff800024ac5a48,0xffffffff82aa7f48 process=0xffff800021664410 user=0xffff80002e7ca000, vmspace=0xfffffd8074bdc110 estcpu=33, cpticks=6, pctcpu=0.11 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 7433 86582 1 0 3 0x100083 ttyin getty 23792 291658 58775 0 3 0x82 piperd syz-executor.7 77365 359984 58775 0 3 0x82 piperd syz-executor.3 49970 314121 58775 0 3 0x82 piperd syz-executor.6 10355 211410 58775 0 3 0x82 piperd syz-executor.1 39466 305909 0 0 3 0x14200 bored sosplice 39702 416797 58775 0 2 0x482 syz-executor.5 78780 326721 58775 0 3 0x82 piperd syz-executor.2 38775 506218 58775 0 3 0x82 piperd syz-executor.4 21946 439660 58775 0 3 0x82 piperd syz-executor.0 58775 387405 53767 0 3 0x82 thrsleep syz-fuzzer 58775 502990 53767 0 3 0x4000082 thrsleep syz-fuzzer 58775 443024 53767 0 3 0x4000082 thrsleep syz-fuzzer 58775 413558 53767 0 3 0x4000082 thrsleep syz-fuzzer 58775 375582 53767 0 3 0x4000082 thrsleep syz-fuzzer 58775 200450 53767 0 3 0x4000082 kqread syz-fuzzer 58775 306053 53767 0 3 0x4000082 thrsleep syz-fuzzer 58775 80465 53767 0 3 0x4000082 thrsleep syz-fuzzer 53767 91812 73673 0 3 0x10008a sigsusp ksh 73673 193995 39403 0 3 0x9a kqread sshd 39403 53003 1 0 3 0x88 kqread sshd 38437 350274 4819 73 3 0x1100090 kqread syslogd 4819 79362 1 0 3 0x100082 netio syslogd 47656 463067 1 0 3 0x100080 kqread resolvd 18293 368605 89818 77 3 0x100092 kqread dhcpleased 35792 97011 89818 77 3 0x100092 kqread dhcpleased 89818 450608 1 0 3 0x80 kqread dhcpleased 58070 469337 0 0 3 0x14200 bored smr 54000 474131 0 0 3 0x14200 pgzero zerothread 17786 352753 0 0 3 0x14200 aiodoned aiodoned 90362 225861 0 0 3 0x14200 syncer update 68683 466086 0 0 3 0x14200 cleaner cleaner 58060 479643 0 0 3 0x14200 reaper reaper 24829 220327 0 0 3 0x14200 pgdaemon pagedaemon 71355 128312 0 0 3 0x14200 bored viomb 54804 163427 0 0 3 0x40014200 acpi0 acpi0 8325 56713 0 0 3 0x14200 bored softnet 87674 146407 0 0 3 0x14200 bored systqmp 54 386055 0 0 3 0x14200 bored systq 51478 443967 0 0 3 0x40014200 bored softclock 71115 84359 0 0 3 0x40014200 idle0 1 56739 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 10170 6419K 7060K 78643K 15869 0 pcb 13 8K 8K 78643K 279 0 rtable 193 9K 10K 78643K 765 0 ifaddr 90 18K 19K 78643K 140 0 counters 27 17K 17K 78643K 31 0 ioctlops 0 0K 4K 78643K 325 0 iov 0 0K 48K 78643K 174 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1282 80K 80K 78643K 2946 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 41 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 188 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 11 37K 85K 78643K 5059 0 sigio 0 0K 0K 78643K 36 0 proc 59 55K 95K 78643K 806 0 subproc 104 6K 6K 78643K 166 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 275 0 in_multi 82 5K 6K 78643K 272 0 ether_multi 1 0K 0K 78643K 29 0 mrt 0 0K 0K 78643K 24 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 85 387K 387K 78643K 85 0 exec 0 0K 2K 78643K 932 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 281 289K 326K 78643K 60885 0 UVM aobj 29 6K 6K 78643K 46 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 369 0 NDP 12 0K 2K 78643K 48 0 temp 146 4711K 4783K 78643K 63400 0 kqueue 12 18K 24K 78643K 331 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 120 257 0 254 1 0 1 1 0 8 0 rtentry 112 198 0 112 4 0 4 4 0 8 0 unpcb 136 1295 0 1282 4 3 1 2 0 8 0 syncache 296 127 0 127 6 5 1 1 0 8 1 tcpqe 32 17 0 17 3 2 1 1 0 8 1 tcpcb 736 1014 0 999 13 9 4 5 0 8 0 arp 88 26 0 10 1 0 1 1 0 8 0 ipq 40 8 0 5 3 2 1 1 0 8 0 ipqe 40 20 0 17 3 2 1 1 0 8 0 inpcb 304 2260 0 2241 6 4 2 4 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 48 46 0 27 1 0 1 1 0 8 0 pkpcb 40 14 0 14 4 4 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 pfstscr 40 15 0 14 1 0 1 1 0 8 0 pfosfp 40 11 0 9 1 0 1 1 0 8 0 pfosfpen 112 11 0 9 1 0 1 1 0 8 0 pfstitem 24 26 0 10 1 0 1 1 0 8 0 pfstkey 112 58 0 55 1 0 1 1 0 8 0 pfstate 320 29 0 21 1 0 1 1 0 8 0 pfrule 1360 16 0 16 3 3 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 950 0 589 30 5 25 30 0 8 2 art_table 32 951 0 589 4 0 4 4 0 8 0 art_node 16 197 0 122 1 0 1 1 0 8 0 sysvmsgpl 40 52 0 26 1 0 1 1 0 8 0 semapl 112 186 0 176 1 0 1 1 0 8 0 shmpl 112 43 0 17 2 1 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8043 0 6574 92 0 92 92 0 8 0 ffsino 240 8043 0 6574 87 0 87 87 0 8 0 nchpl 144 14145 0 12526 63 0 63 63 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 36401 0 36401 4 3 1 2 0 8 1 vcpupl 1984 13 0 0 2 0 2 2 0 8 0 vmpool 528 32 0 19 1 0 1 1 0 8 0 scsiplug 72 8 0 8 2 2 0 1 0 8 0 scxspl 216 44131 0 44131 9 8 1 8 0 8 1 plimitpl 152 213 0 199 1 0 1 1 0 8 0 sigapl 424 5328 0 5292 6 1 5 6 0 8 0 futexpl 64 31458 0 31458 1 0 1 1 0 8 1 knotepl 120 45830 0 45750 5 2 3 4 0 8 0 kqueuepl 184 510 0 502 1 0 1 1 0 8 0 pipepl 304 316 0 288 3 0 3 3 0 8 0 fdescpl 432 5314 0 5292 4 0 4 4 0 8 0 filepl 120 16021 0 15782 9 1 8 9 0 8 0 lockfpl 104 578 0 576 1 0 1 1 0 8 0 lockfspl 48 247 0 245 1 0 1 1 0 8 0 sessionpl 144 28 0 12 1 0 1 1 0 8 0 pgrppl 48 32 0 16 1 0 1 1 0 8 0 ucredpl 96 2274 0 2264 1 0 1 1 0 8 0 zombiepl 144 5293 0 5292 1 0 1 1 0 8 0 processpl 1000 5328 0 5292 7 1 6 7 0 8 0 procpl 672 10775 0 10732 14 8 6 6 0 8 1 sosppl 168 63 0 63 5 4 1 1 0 8 1 sockpl 448 3826 0 3791 15 10 5 7 0 8 0 mcl64k 65536 106 0 106 5 5 0 2 0 8 0 mcl16k 16384 74 0 74 5 4 1 1 0 8 1 mcl12k 12288 48 0 48 4 4 0 1 0 8 0 mcl9k 9216 28 0 28 4 4 0 1 0 8 0 mcl8k 8192 97 0 97 5 4 1 1 0 8 1 mcl4k 4096 124 0 124 7 6 1 1 0 8 1 mcl2k2 2112 10 0 10 3 3 0 1 0 8 0 mcl2k 2048 28621 0 28573 22 14 8 12 0 8 0 mtagpl 96 596 0 286 12 1 11 11 0 8 0 mbufpl 256 110051 0 109442 55 6 49 49 0 8 1 bufpl 288 12223 0 5813 458 0 458 458 0 8 0 anonpl 24 1418717 0 1410101 161 86 75 107 0 188 7 amapchunkpl 152 147130 0 146670 63 25 38 38 0 158 15 amappl16 200 15532 0 15291 74 60 14 38 0 8 0 amappl15 192 1341 0 1335 1 0 1 1 0 8 0 amappl14 184 535 0 529 1 0 1 1 0 8 0 amappl13 176 418 0 414 1 0 1 1 0 8 0 amappl12 168 623 0 619 1 0 1 1 0 8 0 amappl11 160 316 0 305 1 0 1 1 0 8 0 amappl10 152 657 0 655 1 0 1 1 0 8 0 amappl9 144 1148 0 1144 1 0 1 1 0 8 0 amappl8 136 1882 0 1808 3 0 3 3 0 8 0 amappl7 128 1286 0 1275 1 0 1 1 0 8 0 amappl6 120 912 0 882 3 1 2 2 0 8 1 amappl5 112 4314 0 4301 1 0 1 1 0 8 0 amappl4 104 1730 0 1703 2 1 1 2 0 8 0 amappl3 96 1233 0 1218 1 0 1 1 0 8 0 amappl2 88 1582 0 1516 3 1 2 3 0 8 0 amappl1 80 89238 0 88760 18 5 13 18 0 8 0 amappl 88 60143 0 59974 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 72 45 0 17 1 0 1 1 0 8 0 uaddrrnd 24 5346 0 5311 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5346 0 5311 1 0 1 1 0 8 0 vmmpekpl 168 30562 0 30515 3 0 3 3 0 8 0 vmmpepl 168 461944 0 460196 149 47 102 120 0 357 5 vmsppl 272 5345 0 5311 4 1 3 3 0 8 0 rwobjpl 24 110700 0 103615 46 2 44 46 0 8 0 pdppl 4096 10698 0 10635 177 98 79 79 0 8 16 pvpl 32 2543883 0 2531084 291 146 145 261 0 265 19 pmappl 216 5345 0 5311 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 989 0 170 24 0 24 24 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000c03180) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c03180) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c64da0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd807e8e4d30) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:580 udp_detach(fffffd806a7828e8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1249 soclose(fffffd806a7828e8,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd8069eeccc0,ffff800024ac4548) at soo_close+0x40 fdrop(fffffd8069eeccc0,ffff800024ac4548) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8069eeccc0,ffff800024ac4548) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff800024ac4548) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff800024ac4548,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff800024ac4548,ffff80002e7cf790,ffff80002e7cf7f0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e7cf860) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff39b0, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000c03180) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c03180) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c64da0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd807e8e4d30) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:580 udp_detach(fffffd806a7828e8) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1249 soclose(fffffd806a7828e8,0) at soclose+0x245 sys/kern/uipc_socket.c:351 soo_close(fffffd8069eeccc0,ffff800024ac4548) at soo_close+0x40 fdrop(fffffd8069eeccc0,ffff800024ac4548) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8069eeccc0,ffff800024ac4548) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff800024ac4548) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff800024ac4548,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff800024ac4548,ffff80002e7cf790,ffff80002e7cf7f0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e7cf860) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff39b0, count: -14