uvm_fault(0xfffffd8069d5f2f0, 0x4, 0, 1) -> e kernel: page fault trap, code=0 Stopped at igmp_leavegroup+0xaf: movl 0x4(%rax),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND igmp_leavegroup(ffff800000cfe180,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cfe180) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000dc97d0) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd8067792bf0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8073279ba0) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8073279ba0,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8073279ba0,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd8062ff8260,ffff8000216ff080) at soo_close+0x44 fdrop(fffffd8062ff8260,ffff8000216ff080) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd8062ff8260,ffff8000216ff080) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216ff080) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216ff080,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:197 sys_exit(ffff8000216ff080,ffff80002659a020,ffff80002659a070) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002659a0f0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7174cd9667c0, 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(0xfffffd8069d5f2f0, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000cfe180,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cfe180) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000dc97d0) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd8067792bf0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8073279ba0) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8073279ba0,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8073279ba0,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd8062ff8260,ffff8000216ff080) at soo_close+0x44 fdrop(fffffd8062ff8260,ffff8000216ff080) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd8062ff8260,ffff8000216ff080) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216ff080) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216ff080,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:197 sys_exit(ffff8000216ff080,ffff80002659a020,ffff80002659a070) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002659a0f0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7174cd9667c0, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff800026599cb0 rbx 0x9 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0xd98ec6f008b78b34 r11 0xa26e2423447d8b1 r12 0 r13 0x3 r14 0xffff800000cfe180 r15 0xffff8000006b7000 rip 0xffffffff823e429f igmp_leavegroup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800026599c80 ss 0x10 igmp_leavegroup+0xaf: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.7) pid=8178 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=84, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8578,0xffff800021675118 process=0xffff8000fffecfc0 user=0xffff800026595000, vmspace=0xfffffd8069d5f2f0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 98123 120782 72878 0 2 0 syz-executor.3 98123 438866 72878 0 3 0x4000080 fsleep syz-executor.3 93315 87231 13782 0 2 0 syz-executor.6 93315 314493 13782 0 3 0x4000080 fsleep syz-executor.6 40437 154092 96435 0 2 0x482 syz-executor.7 26961 331579 96435 0 2 0x482 syz-executor.0 72878 39647 96435 0 3 0x82 nanoslp syz-executor.3 47055 368868 96435 0 3 0x82 nanoslp syz-executor.2 92044 427500 96435 0 2 0x482 syz-executor.5 49020 201423 1 0 3 0x100083 ttyin getty 55173 405518 96435 0 2 0x482 syz-executor.1 13782 393914 96435 0 3 0x82 nanoslp syz-executor.6 7576 295695 96435 0 3 0x82 nanoslp syz-executor.4 87250 505471 0 0 3 0x14200 acct acct 1548 11867 0 0 3 0x14280 nfsidl nfsio 52067 73897 0 0 3 0x14280 nfsidl nfsio 41228 334318 0 0 3 0x14280 nfsidl nfsio 12492 57063 0 0 3 0x14280 nfsidl nfsio 26047 511855 0 0 3 0x14280 nfsidl nfsio 57630 226153 0 0 3 0x14280 nfsidl nfsio 83894 81256 0 0 3 0x14280 nfsidl nfsio 18345 104137 0 0 3 0x14280 nfsidl nfsio 40560 139231 0 0 3 0x14280 nfsidl nfsio 38353 456346 0 0 3 0x14280 nfsidl nfsio 77794 50932 0 0 3 0x14280 nfsidl nfsio 63130 198473 0 0 3 0x14280 nfsidl nfsio 65202 349020 0 0 3 0x14280 nfsidl nfsio 88266 452001 0 0 3 0x14280 nfsidl nfsio 6472 380108 0 0 3 0x14280 nfsidl nfsio 7550 271749 0 0 3 0x14280 nfsidl nfsio 57537 393225 0 0 3 0x14280 nfsidl nfsio 19217 270009 0 0 3 0x14280 nfsidl nfsio 90559 153030 0 0 3 0x14280 nfsidl nfsio 88792 412523 0 0 3 0x14280 nfsidl nfsio 91748 100325 0 0 3 0x14200 bored sosplice 96435 435800 24988 0 3 0x82 kqread syz-fuzzer 96435 260732 24988 0 3 0x4000082 thrsleep syz-fuzzer 96435 260015 24988 0 3 0x4000082 wait syz-fuzzer 96435 127422 24988 0 3 0x4000082 wait syz-fuzzer 96435 32097 24988 0 3 0x4000082 thrsleep syz-fuzzer 96435 505179 24988 0 3 0x4000082 wait syz-fuzzer 96435 238945 24988 0 3 0x4000082 thrsleep syz-fuzzer 96435 391125 24988 0 3 0x4000082 wait syz-fuzzer 96435 41219 24988 0 3 0x4000082 thrsleep syz-fuzzer 96435 318342 24988 0 3 0x4000082 thrsleep syz-fuzzer 96435 20342 24988 0 3 0x4000082 wait syz-fuzzer 96435 488737 24988 0 3 0x4000082 wait syz-fuzzer 96435 390094 24988 0 3 0x4000082 wait syz-fuzzer 96435 514829 24988 0 3 0x4000082 wait syz-fuzzer 24988 173331 55692 0 3 0x10008a sigsusp ksh 55692 14919 56879 0 3 0x9a kqread sshd 56879 347020 1 0 3 0x88 kqread sshd 83389 143226 47585 73 3 0x1100090 kqread syslogd 47585 484189 1 0 3 0x100082 netio syslogd 3700 254880 1 0 3 0x100080 kqread resolvd 23301 26360 0 0 3 0x14200 bored smr 68554 417241 0 0 2 0x14200 zerothread 72749 183631 0 0 3 0x14200 aiodoned aiodoned 34928 477423 0 0 3 0x14200 syncer update 28322 468545 0 0 3 0x14200 cleaner cleaner 27048 131329 0 0 3 0x14200 reaper reaper 45285 23105 0 0 3 0x14200 pgdaemon pagedaemon 77469 284375 0 0 3 0x14200 bored viomb 89538 325462 0 0 3 0x40014200 acpi0 acpi0 56808 237677 0 0 3 0x14200 bored softnet3 7113 399708 0 0 3 0x14200 bored softnet2 98006 504332 0 0 3 0x14200 bored softnet1 65941 313482 0 0 3 0x14200 bored softnet0 41360 107409 0 0 2 0x14200 systqmp 51520 101642 0 0 3 0x14200 bored systq 30728 311762 0 0 2 0x40014200 softclock 38106 44538 0 0 3 0x40014200 idle0 1 218174 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 10207 6444K 6553K 78643K 13835 0 pcb 16 24K 26K 78643K 2165 0 rtable 214 17K 17K 78643K 3387 0 ifaddr 85 25K 27K 78643K 1180 0 sysctl 2 0K 0K 78643K 2 0 counters 30 17K 18K 78643K 563 0 ioctlops 0 0K 4K 78643K 1615 0 iov 0 0K 40K 78643K 1325 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1412 88K 88K 78643K 6708 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 144 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1720 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 69K 78643K 11779 0 sigio 0 0K 0K 78643K 378 0 proc 55 43K 75K 78643K 1745 0 subproc 104 6K 6K 78643K 539 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 862 0 in_multi 80 5K 6K 78643K 792 0 ether_multi 1 0K 0K 78643K 92 0 mrt 1 0K 0K 78643K 101 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 1K 78643K 2713 0 pfkey data 0 0K 0K 78643K 118 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 8 62K 64K 78643K 10 0 UVM amap 358 99K 114K 78643K 110419 0 UVM aobj 131 5K 5K 78643K 140 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 564 0 NDP 16 0K 2K 78643K 364 0 temp 145 5858K 71522K 78643K 138795 0 kqueue 6 10K 26K 78643K 1068 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 1617 0 1615 21 20 1 3 0 8 0 rtentry 112 701 0 613 4 1 3 4 0 8 0 unpcb 144 13444 0 13438 141 135 6 11 0 8 5 syncache 296 73 0 73 22 22 0 1 0 8 0 sackhl 24 4 0 4 4 4 0 1 0 8 0 tcpqe 32 409 0 409 14 14 0 1 0 8 0 tcpcb 776 4190 0 4186 134 127 7 15 0 8 6 arp 88 98 0 82 1 0 1 1 0 8 0 ipq 40 9 0 7 2 1 1 1 0 8 0 ipqe 40 18 0 16 2 1 1 1 0 8 0 inpcb 336 35437 0 35427 366 357 9 21 0 8 7 nd6 104 139 0 118 1 0 1 1 0 8 0 pkpcb 40 94 0 94 16 16 0 1 0 8 0 kcovpl 48 41 0 33 1 0 1 1 0 8 0 mppekey 1024 11 0 11 4 4 0 1 0 8 0 ppxss 1160 368 0 368 28 28 0 1 0 8 0 pppxif 1360 247 0 247 17 17 0 1 0 8 0 pfstscr 40 6 0 0 1 0 1 1 0 8 0 pfanchor 1288 368 0 0 31 0 31 31 0 8 0 pfstitem 24 6 0 4 1 0 1 1 0 8 0 pfstkey 128 6 0 2 1 0 1 1 0 8 0 pfstate 352 3 0 0 1 0 1 1 0 8 0 rttmr 136 26 0 26 8 8 0 1 0 8 0 art_heap8 4096 8 0 7 8 7 1 2 0 8 0 art_heap4 256 3061 0 2706 56 30 26 31 0 8 1 art_table 32 3069 0 2713 4 0 4 4 0 8 0 art_node 16 659 0 583 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1716 0 1706 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 18023 0 16569 92 0 92 92 0 8 0 ffsino 240 18023 0 16569 86 0 86 86 0 8 0 nchpl 144 34296 0 33781 63 41 22 63 0 8 0 rtmask 32 12 0 12 4 4 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 124027 0 124027 9 8 1 3 0 8 1 kstatmem 264 542 0 510 6 3 3 3 0 8 0 scsiplug 72 20 0 20 6 6 0 1 0 8 0 scxspl 216 105802 0 105802 24 23 1 8 0 8 1 plimitpl 152 2450 0 2436 1 0 1 1 0 8 0 sigapl 424 12037 0 11973 8 0 8 8 0 8 0 futexpl 64 142337 0 142335 5 4 1 1 0 8 0 knotepl 120 232498 0 232434 183 176 7 21 0 8 4 kqueuepl 184 2687 0 2682 30 26 4 6 0 8 3 pipepl 288 3022 0 2994 73 70 3 7 0 8 0 fdescpl 432 11998 0 11977 9 6 3 4 0 8 0 filepl 120 115050 0 114827 184 171 13 20 0 8 5 lockfpl 104 2782 0 2781 9 8 1 4 0 8 0 lockfspl 48 636 0 635 1 0 1 1 0 8 0 sessionpl 144 58 0 43 1 0 1 1 0 8 0 pgrppl 48 235 0 220 1 0 1 1 0 8 0 ucredpl 104 14122 0 14115 1 0 1 1 0 8 0 zombiepl 144 11979 0 11973 4 3 1 1 0 8 0 processpl 1008 12037 0 11973 10 1 9 9 0 8 0 procpl 696 29992 0 29913 24 15 9 10 0 8 0 sosppl 168 155 0 155 25 24 1 1 0 8 1 sockpl 456 50606 0 50588 1108 1098 10 36 0 8 7 mcl64k 65536 479 0 479 37 36 1 1 0 8 1 mcl16k 16384 196 0 196 42 41 1 1 0 8 1 mcl12k 12288 562 0 562 33 32 1 1 0 8 1 mcl9k 9216 208 0 208 33 32 1 1 0 8 1 mcl8k 8192 725 0 725 32 31 1 1 0 8 1 mcl4k 4096 1496 0 1496 24 23 1 1 0 8 1 mcl2k2 2112 86 0 86 27 26 1 1 0 8 1 mcl2k 2048 99432 0 99388 63 56 7 30 0 8 1 mtagpl 96 20 0 20 5 5 0 1 0 8 0 mbufpl 256 276906 0 276829 750 742 8 210 0 8 1 bufpl 288 22560 0 16175 457 0 457 457 0 8 0 anonpl 24 1207640 0 1192820 226 119 107 175 0 188 0 amapchunkpl 152 354401 0 353625 165 129 36 67 0 158 0 amappl16 200 21780 0 21309 93 67 26 38 0 8 0 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 259 0 247 2 1 1 2 0 8 0 amappl13 176 14 0 13 1 0 1 1 0 8 0 amappl12 168 13119 0 13098 2 0 2 2 0 8 0 amappl11 160 54 0 50 1 0 1 1 0 8 0 amappl10 152 59 0 46 1 0 1 1 0 8 0 amappl9 144 234 0 233 2 1 1 2 0 8 0 amappl8 136 597 0 473 5 0 5 5 0 8 0 amappl7 128 107 0 89 1 0 1 1 0 8 0 amappl6 120 525 0 507 2 1 1 2 0 8 0 amappl5 112 502 0 499 1 0 1 1 0 8 0 amappl4 104 1253 0 1219 2 0 2 2 0 8 0 amappl3 96 69003 0 68944 4 1 3 3 0 8 0 amappl2 88 12707 0 12662 4 2 2 3 0 8 0 amappl1 80 53488 0 53080 22 11 11 22 0 8 0 amappl 88 109200 0 108999 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 72 139 0 9 3 0 3 3 0 8 0 uaddrrnd 24 11998 0 11977 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11998 0 11977 1 0 1 1 0 8 0 vmmpekpl 168 87624 0 87561 4 0 4 4 0 8 0 vmmpepl 168 715075 0 713108 370 260 110 127 0 357 0 vmsppl 368 11997 0 11977 3 0 3 3 0 8 0 rwobjpl 24 170018 0 162593 49 2 47 47 0 8 0 pdppl 4096 24003 0 23954 728 669 59 67 0 8 10 pvpl 32 3383966 0 3364332 601 419 182 334 0 265 0 pmappl 216 11997 0 11977 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2853 0 2093 29 5 24 28 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000cfe180,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cfe180) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000dc97d0) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd8067792bf0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8073279ba0) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8073279ba0,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8073279ba0,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd8062ff8260,ffff8000216ff080) at soo_close+0x44 fdrop(fffffd8062ff8260,ffff8000216ff080) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd8062ff8260,ffff8000216ff080) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216ff080) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216ff080,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:197 sys_exit(ffff8000216ff080,ffff80002659a020,ffff80002659a070) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002659a0f0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7174cd9667c0, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000cfe180,ffff8000006b7000) at igmp_leavegroup+0xaf sys/netinet/igmp.c:512 in_delmulti(ffff800000cfe180) at in_delmulti+0xd8 sys/netinet/in.c:908 ip_freemoptions(ffff800000dc97d0) at ip_freemoptions+0x5d sys/netinet/ip_output.c:1770 in_pcbdetach(fffffd8067792bf0) at in_pcbdetach+0x97 sys/netinet/in_pcb.c:591 udp_detach(fffffd8073279ba0) at udp_detach+0x3f sys/netinet/udp_usrreq.c:1113 soclose(fffffd8073279ba0,0) at soclose+0x253 pru_detach sys/sys/protosw.h:281 [inline] soclose(fffffd8073279ba0,0) at soclose+0x253 sys/kern/uipc_socket.c:397 soo_close(fffffd8062ff8260,ffff8000216ff080) at soo_close+0x44 fdrop(fffffd8062ff8260,ffff8000216ff080) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd8062ff8260,ffff8000216ff080) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216ff080) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216ff080,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:197 sys_exit(ffff8000216ff080,ffff80002659a020,ffff80002659a070) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002659a0f0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7174cd9667c0, count: -14