panic: malformed IPv4 option passed to ip_optcopy Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *413217 25315 0 0 0 0 syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828efb08) at panic+0x165 sys/kern/subr_prf.c:198 ip_fragment(fffffd807e505400,ffff80002a676a88,ffff80000019e2a8,5dc) at ip_fragment+0x7b1 ip_output(fffffd807e505400,0,fffffd806ee3f618,22,0,0,d0f0bd4488133ee4) at ip_output+0xe10 sys/netinet/ip_output.c:478 divert_output(fffffd806ee3f5a0,fffffd807e505400,fffffd807e505100,0) at divert_output+0x2ca sys/netinet/ip_divert.c:174 sosend(fffffd806e568d68,fffffd807e505100,ffff80002a676d00,0,0,0) at sosend+0x66d sendit(ffff80002a5f8810,3,ffff80002a676e98,0,ffff80002a676e88) at sendit+0x65d sys/kern/uipc_syscalls.c:786 sys_sendmmsg(ffff80002a5f8810,ffff80002a677040,ffff80002a676f90) at sys_sendmmsg+0x344 sys/kern/uipc_syscalls.c:677 syscall(ffff80002a677040) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77333b30f850, count: 5 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: malformed IPv4 option passed to ip_optcopy ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828efb08) at panic+0x165 sys/kern/subr_prf.c:198 ip_fragment(fffffd807e505400,ffff80002a676a88,ffff80000019e2a8,5dc) at ip_fragment+0x7b1 ip_output(fffffd807e505400,0,fffffd806ee3f618,22,0,0,d0f0bd4488133ee4) at ip_output+0xe10 sys/netinet/ip_output.c:478 divert_output(fffffd806ee3f5a0,fffffd807e505400,fffffd807e505100,0) at divert_output+0x2ca sys/netinet/ip_divert.c:174 sosend(fffffd806e568d68,fffffd807e505100,ffff80002a676d00,0,0,0) at sosend+0x66d sendit(ffff80002a5f8810,3,ffff80002a676e98,0,ffff80002a676e88) at sendit+0x65d sys/kern/uipc_syscalls.c:786 sys_sendmmsg(ffff80002a5f8810,ffff80002a677040,ffff80002a676f90) at sys_sendmmsg+0x344 sys/kern/uipc_syscalls.c:677 syscall(ffff80002a677040) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77333b30f850, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a6768d0 rbx 0x24 rdx 0x3fd rcx 0 rax 0x32 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb94b31b464444870 r11 0xa8f4a684d438fe09 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff818496ac db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002a6768c0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) tid=413217 pid=25315 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a61c560,0xffffffff82d736d8 process=0xffff8000ffff90c8 user=0xffff80002a672000, vmspace=0xfffffd807927f6e8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *25315 413217 17527 0 7 0 syz-executor.0 17527 185402 38001 0 3 0x82 nanoslp syz-executor.0 38001 287023 79582 0 3 0x2000082 thrsleep syz-execprog 38001 376055 79582 0 3 0x6000082 thrsleep syz-execprog 38001 388425 79582 0 3 0x6000082 wait syz-execprog 38001 220952 79582 0 3 0x6000082 thrsleep syz-execprog 38001 448813 79582 0 3 0x6000082 thrsleep syz-execprog 38001 137666 79582 0 3 0x6000082 thrsleep syz-execprog 38001 460514 79582 0 3 0x6000082 kqread syz-execprog 38001 362029 79582 0 3 0x6000082 thrsleep syz-execprog 38001 422704 79582 0 3 0x6000082 thrsleep syz-execprog 38001 358948 79582 0 3 0x6000082 thrsleep syz-execprog 38001 51369 79582 0 3 0x6000082 thrsleep syz-execprog 79582 273192 92237 0 3 0x10008a sigsusp ksh 92237 426182 96710 0 3 0x9a kqread sshd 75517 31478 1 0 3 0x100083 ttyin getty 96710 371813 1 0 3 0x88 kqread sshd 68661 284196 29687 73 3 0x1100090 kqread syslogd 29687 51802 1 0 3 0x100082 netio syslogd 38038 100683 1 0 3 0x100080 kqread resolvd 98913 23389 16706 77 3 0x100092 kqread dhcpleased 71923 375699 16706 77 3 0x100092 kqread dhcpleased 16706 314329 1 0 3 0x80 kqread dhcpleased 44899 517653 0 0 3 0x14200 bored smr 9883 338780 0 0 2 0x14200 zerothread 80615 468850 0 0 3 0x14200 aiodoned aiodoned 73497 174856 0 0 3 0x14200 syncer update 77043 217901 0 0 3 0x14200 cleaner cleaner 7477 135014 0 0 3 0x14200 reaper reaper 79128 186025 0 0 3 0x14200 pgdaemon pagedaemon 44846 98207 0 0 3 0x14200 bored viomb 93021 175926 0 0 3 0x40014200 acpi0 acpi0 49169 352333 0 0 3 0x14200 bored softnet3 19326 371549 0 0 3 0x14200 bored softnet2 74581 319503 0 0 3 0x14200 bored softnet1 9939 485235 0 0 3 0x14200 bored softnet0 75756 462301 0 0 3 0x14200 bored systqmp 29738 343806 0 0 3 0x14200 bored systq 98155 22658 0 0 3 0x40014200 tmoslp softclock 56259 279093 0 0 3 0x40014200 idle0 1 117719 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 10140 6384K 6413K 166960K 11218 0 pcb 15 10K 10K 166960K 15 0 rtable 80 2K 2K 166960K 140 0 pf 15 6K 6K 166960K 15 0 ifaddr 15 6K 6K 166960K 15 0 ifgroup 22 1K 1K 166960K 22 0 counters 23 16K 16K 166960K 23 0 ioctlops 0 0K 2K 166960K 22 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1174 73K 74K 166960K 1187 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 3 8K 12K 166960K 18 0 proc 55 58K 67K 166960K 274 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 22 1K 1K 166960K 22 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 273 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 152 14K 15K 166960K 2520 0 UVM aobj 3 2K 2K 166960K 3 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 6 0K 0K 166960K 6 0 temp 1 6748K 6812K 166960K 3126 0 kqueue 12 18K 18K 166960K 25 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 22 0 19 1 0 1 1 0 8 0 rtentry 112 34 0 1 1 0 1 1 0 8 0 unpcb 144 33 0 20 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 144 0 144 1 0 1 1 0 8 1 tcpcb 808 8 0 5 1 0 1 1 0 8 0 arp 88 4 0 0 1 0 1 1 0 8 0 inpcb 360 31 0 24 1 0 1 1 0 8 0 nd6 104 3 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 144 0 0 9 0 9 9 0 8 0 art_table 32 145 0 0 2 0 2 2 0 8 0 art_node 16 33 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1455 0 51 88 0 88 88 0 8 0 ffsino 240 1455 0 51 83 0 83 83 0 8 0 nchpl 144 1692 0 61 61 0 61 61 0 8 0 uvmvnodes 80 1464 0 0 30 0 30 30 0 8 0 vnodes 216 1464 0 0 82 0 82 82 0 8 0 namei 1024 5187 0 5187 3 0 3 3 0 8 3 kstatmem 264 8 0 0 1 0 1 1 0 8 0 scxspl 216 6375 0 6375 3 0 3 3 1 8 3 plimitpl 152 27 0 19 1 0 1 1 0 8 0 sigapl 424 339 0 308 5 0 5 5 0 8 1 knotepl 120 3661 0 3625 2 0 2 2 0 8 0 kqueuepl 184 21 0 13 1 0 1 1 0 8 0 pipepl 288 111 0 104 1 0 1 1 0 8 0 fdescpl 432 323 0 308 3 0 3 3 0 8 1 filepl 120 1390 0 1324 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 104 66 0 56 1 0 1 1 0 8 0 zombiepl 144 308 0 308 1 0 1 1 0 8 1 processpl 1072 339 0 308 3 0 3 3 0 8 0 procpl 680 349 0 308 5 0 5 5 0 8 1 sockpl 488 86 0 63 3 0 3 3 0 8 0 mcl8k 8192 5 0 4 1 0 1 1 0 8 0 mcl4k 4096 10 0 10 1 0 1 1 0 8 1 mcl2k 2048 11720 0 11678 33 19 14 32 0 8 8 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 18921 0 18862 17 5 12 17 0 8 8 bufpl 280 4046 0 141 279 0 279 279 0 8 0 anonpl 24 179534 0 176135 52 0 52 52 0 188 26 amapchunkpl 152 8986 0 8638 25 0 25 25 0 158 11 amappl16 200 5077 0 5011 5 0 5 5 0 8 1 amappl15 192 16 0 15 1 0 1 1 0 8 0 amappl14 184 130 0 119 2 0 2 2 0 8 1 amappl13 176 4 0 4 1 0 1 1 0 8 1 amappl12 168 839 0 823 2 0 2 2 0 8 1 amappl11 160 53 0 43 1 0 1 1 0 8 0 amappl10 152 14 0 12 1 0 1 1 0 8 0 amappl9 144 157 0 157 1 0 1 1 0 8 1 amappl8 136 111 0 90 2 0 2 2 0 8 1 amappl7 128 154 0 140 2 0 2 2 0 8 0 amappl6 120 144 0 138 1 0 1 1 0 8 0 amappl5 112 119 0 110 1 0 1 1 0 8 0 amappl4 104 380 0 361 2 0 2 2 0 8 1 amappl3 96 2344 0 2303 2 0 2 2 0 8 0 amappl2 88 727 0 672 3 0 3 3 0 8 1 amappl1 80 9734 0 9272 22 0 22 22 0 8 12 amappl 88 2101 0 2011 4 0 4 4 0 92 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 323 0 308 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 323 0 308 1 0 1 1 0 8 0 vmmpekpl 168 9194 0 9169 2 0 2 2 0 8 0 vmmpepl 168 39930 0 38740 110 0 110 110 0 357 54 vmsppl 352 322 0 308 3 0 3 3 0 8 1 rwobjpl 24 19749 0 17486 19 0 19 19 0 8 1 pdppl 4096 652 0 616 74 18 56 60 0 8 20 pvpl 32 366422 0 358835 336 0 336 336 0 265 265 pmappl 216 322 0 308 2 0 2 2 0 8 1 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 324 0 42 9 0 9 9 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828efb08) at panic+0x165 sys/kern/subr_prf.c:198 ip_fragment(fffffd807e505400,ffff80002a676a88,ffff80000019e2a8,5dc) at ip_fragment+0x7b1 ip_output(fffffd807e505400,0,fffffd806ee3f618,22,0,0,d0f0bd4488133ee4) at ip_output+0xe10 sys/netinet/ip_output.c:478 divert_output(fffffd806ee3f5a0,fffffd807e505400,fffffd807e505100,0) at divert_output+0x2ca sys/netinet/ip_divert.c:174 sosend(fffffd806e568d68,fffffd807e505100,ffff80002a676d00,0,0,0) at sosend+0x66d sendit(ffff80002a5f8810,3,ffff80002a676e98,0,ffff80002a676e88) at sendit+0x65d sys/kern/uipc_syscalls.c:786 sys_sendmmsg(ffff80002a5f8810,ffff80002a677040,ffff80002a676f90) at sys_sendmmsg+0x344 sys/kern/uipc_syscalls.c:677 syscall(ffff80002a677040) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77333b30f850, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828efb08) at panic+0x165 sys/kern/subr_prf.c:198 ip_fragment(fffffd807e505400,ffff80002a676a88,ffff80000019e2a8,5dc) at ip_fragment+0x7b1 ip_output(fffffd807e505400,0,fffffd806ee3f618,22,0,0,d0f0bd4488133ee4) at ip_output+0xe10 sys/netinet/ip_output.c:478 divert_output(fffffd806ee3f5a0,fffffd807e505400,fffffd807e505100,0) at divert_output+0x2ca sys/netinet/ip_divert.c:174 sosend(fffffd806e568d68,fffffd807e505100,ffff80002a676d00,0,0,0) at sosend+0x66d sendit(ffff80002a5f8810,3,ffff80002a676e98,0,ffff80002a676e88) at sendit+0x65d sys/kern/uipc_syscalls.c:786 sys_sendmmsg(ffff80002a5f8810,ffff80002a677040,ffff80002a676f90) at sys_sendmmsg+0x344 sys/kern/uipc_syscalls.c:677 syscall(ffff80002a677040) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77333b30f850, count: -10 ddb>