`‹¨+'þ¿üº 1éš8¶µY`‹¨+'þ¿üº 1éš8¶µYpanic: m_copydata: null mbuf Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *148613 24405 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82251aef) at panic+0x15c sys/kern/subr_prf.c:207 m_copydata(fffffd8058968900,30,8,fffffd805990d920) at m_copydata+0x17e m_getptr sys/kern/uipc_mbuf.c:1031 [inline] m_copydata(fffffd8058968900,30,8,fffffd805990d920) at m_copydata+0x17e sys/kern/uipc_mbuf.c:722 ip6_pullexthdr(fffffd8058968900,30,0) at ip6_pullexthdr+0x16f sys/netinet6/ip6_input.c:1169 ip6_savecontrol(fffffd8066975c08,fffffd8058968900,ffff80001fa32230) at ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1056 rip6_input(ffff80001fa32488,ffff80001fa32494,0,18) at rip6_input+0x75b sys/netinet6/raw_ip6.c:225 ip_deliver(ffff80001fa32488,ffff80001fa32494,0,18) at ip_deliver+0x2e3 sys/netinet/ip_input.c:668 ip6_input_if(ffff80001fa32488,ffff80001fa32494,29,0,ffff80000017a2a8) at ip6_input_if+0xf26 ipv6_input(ffff80000017a2a8,fffffd8058968900) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff80000017a2a8,fffffd8058968900,18) at if_input_local+0x121 sys/net/if.c:780 ip6_output(fffffd8058968800,ffff800000a0ad80,fffffd8066975188,0,0,fffffd8066975118) at ip6_output+0xd02 rip6_output(fffffd8058968800,fffffd806b7bb970,ffff80001fa327f0,0) at rip6_output+0x4d7 sys/netinet6/raw_ip6.c:481 rip6_usrreq(fffffd806b7bb970,9,fffffd8058968800,0,0,ffff80001d7a8600) at rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670 sosend(fffffd806b7bb970,0,ffff80001fa32a38,0,0,0) at sosend+0x669 sys/kern/uipc_socket.c:549 end trace frame: 0xffff80001fa32a20, count: 0 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 m_copydata: null mbuf ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82251aef) at panic+0x15c sys/kern/subr_prf.c:207 m_copydata(fffffd8058968900,30,8,fffffd805990d920) at m_copydata+0x17e m_getptr sys/kern/uipc_mbuf.c:1031 [inline] m_copydata(fffffd8058968900,30,8,fffffd805990d920) at m_copydata+0x17e sys/kern/uipc_mbuf.c:722 ip6_pullexthdr(fffffd8058968900,30,0) at ip6_pullexthdr+0x16f sys/netinet6/ip6_input.c:1169 ip6_savecontrol(fffffd8066975c08,fffffd8058968900,ffff80001fa32230) at ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1056 rip6_input(ffff80001fa32488,ffff80001fa32494,0,18) at rip6_input+0x75b sys/netinet6/raw_ip6.c:225 ip_deliver(ffff80001fa32488,ffff80001fa32494,0,18) at ip_deliver+0x2e3 sys/netinet/ip_input.c:668 ip6_input_if(ffff80001fa32488,ffff80001fa32494,29,0,ffff80000017a2a8) at ip6_input_if+0xf26 ipv6_input(ffff80000017a2a8,fffffd8058968900) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff80000017a2a8,fffffd8058968900,18) at if_input_local+0x121 sys/net/if.c:780 ip6_output(fffffd8058968800,ffff800000a0ad80,fffffd8066975188,0,0,fffffd8066975118) at ip6_output+0xd02 rip6_output(fffffd8058968800,fffffd806b7bb970,ffff80001fa327f0,0) at rip6_output+0x4d7 sys/netinet6/raw_ip6.c:481 rip6_usrreq(fffffd806b7bb970,9,fffffd8058968800,0,0,ffff80001d7a8600) at rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670 sosend(fffffd806b7bb970,0,ffff80001fa32a38,0,0,0) at sosend+0x669 sys/kern/uipc_socket.c:549 dofilewritev(ffff80001d7a8600,6,ffff80001fa32a38,0,ffff80001fa32b20) at dofilewritev+0x1ab sys/kern/sys_generic.c:365 sys_write(ffff80001d7a8600,ffff80001fa32ad8,ffff80001fa32b20) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff80001fa32ba0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd189112ef0, count: -18 ddb> show registers rdi 0xffffffff817e2fa7 db_enter+0x17 rsi 0x139c __ALIGN_SIZE+0x39c rbp 0xffff80001fa31fa0 rbx 0xffff80001fa32050 rdx 0x139d __ALIGN_SIZE+0x39d rcx 0xffff80001fa33000 rax 0xffff80001fa33000 r8 0xffff80001fa31f60 r9 0x1 r10 0xffff8000009fb340 r11 0xf108891abad8027b r12 0x3000000008 r13 0xffff80001fa31fb0 r14 0x100 r15 0x1 rip 0xffffffff817e2fa8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001fa31f90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=148613 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80001d73a868,0xffffffff82591038 process=0xffff8000ffff9940 user=0xffff80001fa2d000, vmspace=0xfffffd805726a778 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 24405 482386 58229 0 2 0 syz-executor.0 *24405 148613 58229 0 7 0x4000000 syz-executor.0 7421 364010 0 0 3 0x14200 bored sosplice 58229 25272 68371 0 3 0x82 nanosleep syz-executor.0 11333 510880 68371 0 2 0x2 syz-executor.1 68371 327180 74593 0 3 0x82 thrsleep syz-fuzzer 68371 307652 74593 0 3 0x4000082 nanosleep syz-fuzzer 68371 88596 74593 0 3 0x4000082 thrsleep syz-fuzzer 68371 164253 74593 0 3 0x4000082 thrsleep syz-fuzzer 68371 228337 74593 0 3 0x4000082 kqread syz-fuzzer 68371 443554 74593 0 3 0x4000082 thrsleep syz-fuzzer 68371 321455 74593 0 3 0x4000082 thrsleep syz-fuzzer 74593 96795 93040 0 3 0x10008a pause ksh 93040 405188 89672 0 3 0x92 select sshd 46027 240996 1 0 3 0x100083 ttyin getty 89672 147282 1 0 3 0x80 select sshd 51239 202550 79715 73 3 0x100090 kqread syslogd 79715 1621 1 0 3 0x100082 netio syslogd 6106 302356 1 77 3 0x100090 poll dhclient 14488 33037 1 0 3 0x80 poll dhclient 75019 271246 0 0 3 0x14200 bored smr 86916 197526 0 0 2 0x14200 zerothread 25904 429509 0 0 3 0x14200 aiodoned aiodoned 47025 110386 0 0 3 0x14200 syncer update 64122 437295 0 0 3 0x14200 cleaner cleaner 79822 210473 0 0 3 0x14200 reaper reaper 66954 38782 0 0 3 0x14200 pgdaemon pagedaemon 1820 336290 0 0 3 0x14200 bored crynlk 60817 497614 0 0 3 0x14200 bored crypto 39442 121913 0 0 3 0x40014200 acpi0 acpi0 28511 293145 0 0 3 0x14200 bored softnet 94663 26175 0 0 3 0x14200 bored systqmp 50447 320529 0 0 3 0x14200 bored systq 26601 285063 0 0 3 0x40014200 bored softclock 72684 127647 0 0 3 0x40014200 idle0 1 151377 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 9507 6596K 7239K 78643K 11239 0 pcb 16 8K 9K 78643K 106 0 rtable 105 3K 3K 78643K 246 0 ifaddr 62 13K 13K 78643K 100 0 counters 21 16K 16K 78643K 28 0 ioctlops 0 0K 2K 78643K 21 0 iov 0 0K 12K 78643K 24 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 1392 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 0K 0K 78643K 2 0 sem 6 0K 0K 78643K 6 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 5 13K 25K 78643K 143 0 sigio 0 0K 0K 78643K 8 0 proc 49 38K 63K 78643K 370 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 1 0K 0K 78643K 10 0 in_multi 42 2K 2K 78643K 55 0 ether_multi 2 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 187 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 116 54K 54K 78643K 1158 0 UVM aobj 6 2K 2K 78643K 8 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 0K 78643K 16 0 NDP 10 0K 0K 78643K 21 0 temp 86 3033K 3097K 78643K 3258 0 kqueue 3 4K 8K 78643K 5 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 arp 64 6 0 0 1 0 1 1 0 8 0 rtpcb 80 31 0 29 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 65 0 57 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 83 0 83 1 0 1 1 0 8 1 tcpcb 544 42 0 36 1 0 1 1 0 8 0 inpcb 280 204 0 193 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 6 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1586 0 186 88 0 88 88 0 8 0 ffsino 240 1586 0 186 83 0 83 83 0 8 0 nchpl 144 2006 0 397 60 0 60 60 0 8 0 uvmvnodes 72 1767 0 0 33 0 33 33 0 8 0 vnodes 208 1767 0 0 93 0 93 93 0 8 0 namei 1024 5081 0 5081 1 0 1 1 0 8 1 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 528 4 0 0 1 0 1 1 0 8 0 scxspl 192 5773 0 5773 1 0 1 1 0 8 1 plimitpl 152 33 0 26 1 0 1 1 0 8 0 sigapl 424 330 0 301 4 0 4 4 0 8 0 futexpl 56 2507 0 2507 1 0 1 1 0 8 1 knotepl 112 57 0 38 1 0 1 1 0 8 0 kqueuepl 144 14 0 12 1 0 1 1 0 8 0 pipelkpl 16 86 0 76 1 0 1 1 0 8 0 pipepl 120 172 0 153 2 0 2 2 0 8 1 fdescpl 432 315 0 301 2 0 2 2 0 8 0 filepl 120 1869 0 1770 4 0 4 4 0 8 1 lockfpl 104 36 0 35 1 0 1 1 0 8 0 lockfspl 48 15 0 14 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 190 0 183 1 0 1 1 0 8 0 zombiepl 144 301 0 301 1 0 1 1 0 8 1 processpl 920 330 0 301 4 0 4 4 0 8 0 procpl 624 468 0 432 4 0 4 4 0 8 1 sosppl 128 6 0 6 1 0 1 1 0 8 1 sockpl 400 309 0 288 4 0 4 4 0 8 1 mcl64k 65536 25 0 25 1 0 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 3 0 3 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 13 0 13 2 1 1 1 0 8 1 mcl2k 2048 62309 0 62261 17 4 13 14 0 8 6 mtagpl 80 18 0 2 2 1 1 1 0 8 0 mbufpl 256 99595 0 99481 11 2 9 9 0 8 1 bufpl 280 4233 0 182 290 0 290 290 0 8 0 anonpl 16 42183 0 27494 63 2 61 61 0 107 1 amapchunkpl 152 1386 0 1256 9 0 9 9 0 158 3 amappl16 192 1403 0 587 41 0 41 41 0 8 0 amappl15 184 59 0 56 1 0 1 1 0 8 0 amappl14 176 25 0 20 1 0 1 1 0 8 0 amappl13 168 23 0 22 1 0 1 1 0 8 0 amappl12 160 15 0 9 1 0 1 1 0 8 0 amappl11 152 99 0 88 1 0 1 1 0 8 0 amappl10 144 14 0 11 1 0 1 1 0 8 0 amappl9 136 374 0 373 1 0 1 1 0 8 0 amappl8 128 307 0 272 2 0 2 2 0 8 0 amappl7 120 106 0 96 1 0 1 1 0 8 0 amappl6 112 22 0 18 1 0 1 1 0 8 0 amappl5 104 262 0 250 1 0 1 1 0 8 0 amappl4 96 417 0 393 1 0 1 1 0 8 0 amappl3 88 108 0 103 1 0 1 1 0 8 0 amappl2 80 1779 0 1713 3 1 2 3 0 8 0 amappl1 72 15483 0 15069 26 12 14 20 0 8 4 amappl 80 691 0 649 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 7 0 2 1 0 1 1 0 8 0 uaddrrnd 24 319 0 301 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 319 0 301 1 0 1 1 0 8 0 vmmpekpl 168 6058 0 6029 2 0 2 2 0 8 0 vmmpepl 168 44267 0 42376 105 7 98 98 0 357 12 vmsppl 272 318 0 301 2 0 2 2 0 8 0 pdppl 4096 644 0 606 6 0 6 6 0 8 1 pvpl 32 144160 0 126485 150 0 150 150 0 265 5 pmappl 200 318 0 301 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 240 0 9 7 0 7 7 0 8 0