`±¯Í%qÝK…±øø0U“Á§—F¿panic: m_copydata: null mbuf Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *516189 34863 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8224aa18) at panic+0x15c sys/kern/subr_prf.c:207 m_copydata(fffffd8051e48000,40,8,fffffd8051e48420) at m_copydata+0x17e m_getptr sys/kern/uipc_mbuf.c:1031 [inline] m_copydata(fffffd8051e48000,40,8,fffffd8051e48420) at m_copydata+0x17e sys/kern/uipc_mbuf.c:722 ip6_pullexthdr(fffffd8051e48000,40,0) at ip6_pullexthdr+0x16f sys/netinet6/ip6_input.c:1169 ip6_savecontrol(fffffd8061b70118,fffffd8051e48000,ffff80001e43ea00) at ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1056 rip6_input(ffff80001e43ec58,ffff80001e43ec64,0,18) at rip6_input+0x75b sys/netinet6/raw_ip6.c:225 ip_deliver(ffff80001e43ec58,ffff80001e43ec64,0,18) at ip_deliver+0x2e3 sys/netinet/ip_input.c:668 ip6_input_if(ffff80001e43ec58,ffff80001e43ec64,29,0,ffff80000017a2a8) at ip6_input_if+0xf26 ipv6_input(ffff80000017a2a8,fffffd8051e48000) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff80000017a2a8,fffffd8051e48000,18) at if_input_local+0x121 sys/net/if.c:780 ip6_output(fffffd8051e48700,ffff800000a05a00,fffffd8061b70ea8,0,0,fffffd8061b70e38) at ip6_output+0xd02 rip6_output(fffffd8051e48b00,fffffd8061b71c80,ffff80001e43efc0,0) at rip6_output+0x4d7 sys/netinet6/raw_ip6.c:481 rip6_usrreq(fffffd8061b71c80,9,fffffd8051e48b00,0,0,ffff80001d35e128) at rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670 sosend(fffffd8061b71c80,0,ffff80001e43f208,0,0,0) at sosend+0x669 sys/kern/uipc_socket.c:549 end trace frame: 0xffff80001e43f1f0, 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(ffffffff8224aa18) at panic+0x15c sys/kern/subr_prf.c:207 m_copydata(fffffd8051e48000,40,8,fffffd8051e48420) at m_copydata+0x17e m_getptr sys/kern/uipc_mbuf.c:1031 [inline] m_copydata(fffffd8051e48000,40,8,fffffd8051e48420) at m_copydata+0x17e sys/kern/uipc_mbuf.c:722 ip6_pullexthdr(fffffd8051e48000,40,0) at ip6_pullexthdr+0x16f sys/netinet6/ip6_input.c:1169 ip6_savecontrol(fffffd8061b70118,fffffd8051e48000,ffff80001e43ea00) at ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1056 rip6_input(ffff80001e43ec58,ffff80001e43ec64,0,18) at rip6_input+0x75b sys/netinet6/raw_ip6.c:225 ip_deliver(ffff80001e43ec58,ffff80001e43ec64,0,18) at ip_deliver+0x2e3 sys/netinet/ip_input.c:668 ip6_input_if(ffff80001e43ec58,ffff80001e43ec64,29,0,ffff80000017a2a8) at ip6_input_if+0xf26 ipv6_input(ffff80000017a2a8,fffffd8051e48000) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff80000017a2a8,fffffd8051e48000,18) at if_input_local+0x121 sys/net/if.c:780 ip6_output(fffffd8051e48700,ffff800000a05a00,fffffd8061b70ea8,0,0,fffffd8061b70e38) at ip6_output+0xd02 rip6_output(fffffd8051e48b00,fffffd8061b71c80,ffff80001e43efc0,0) at rip6_output+0x4d7 sys/netinet6/raw_ip6.c:481 rip6_usrreq(fffffd8061b71c80,9,fffffd8051e48b00,0,0,ffff80001d35e128) at rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670 sosend(fffffd8061b71c80,0,ffff80001e43f208,0,0,0) at sosend+0x669 sys/kern/uipc_socket.c:549 dofilewritev(ffff80001d35e128,6,ffff80001e43f208,0,ffff80001e43f2f0) at dofilewritev+0x1ab sys/kern/sys_generic.c:365 sys_write(ffff80001d35e128,ffff80001e43f2a8,ffff80001e43f2f0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff80001e43f370) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x909c3799c80, count: -18 ddb> show registers rdi 0xffffffff81a40ae7 db_enter+0x17 rsi 0x11e5 __ALIGN_SIZE+0x1e5 rbp 0xffff80001e43e770 rbx 0xffff80001e43e820 rdx 0x11e6 __ALIGN_SIZE+0x1e6 rcx 0xffff80001d42f000 rax 0xffff80001d42f000 r8 0xffff80001e43e730 r9 0x1 r10 0xffff8000009f46c0 r11 0x2a575e43d6cb6e30 r12 0x3000000008 r13 0xffff80001e43e780 r14 0x100 r15 0x1 rip 0xffffffff81a40ae8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001e43e760 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=516189 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff80001d35e608,0xffff80001d35e3a8 process=0xffff8000ffffbc10 user=0xffff80001e43a000, vmspace=0xfffffd80563edaa8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 8602 346313 92878 0 2 0 syz-executor.0 8602 210865 92878 0 3 0x4000080 fsleep syz-executor.0 34863 317063 2219 0 2 0 syz-executor.1 *34863 516189 2219 0 7 0x4000000 syz-executor.1 81207 391394 1 0 3 0x100083 ttyin getty 48912 142465 0 0 3 0x14200 bored sosplice 92878 262597 19039 0 3 0x82 nanosleep syz-executor.0 2219 58462 19039 0 3 0x82 nanosleep syz-executor.1 19039 138135 2197 0 3 0x82 thrsleep syz-fuzzer 19039 521618 2197 0 3 0x4000082 thrsleep syz-fuzzer 19039 168835 2197 0 3 0x4000082 thrsleep syz-fuzzer 19039 499813 2197 0 3 0x4000082 thrsleep syz-fuzzer 19039 178661 2197 0 3 0x4000082 thrsleep syz-fuzzer 19039 392449 2197 0 3 0x4000082 thrsleep syz-fuzzer 19039 357283 2197 0 3 0x4000082 thrsleep syz-fuzzer 19039 166175 2197 0 3 0x4000082 kqread syz-fuzzer 2197 229249 39678 0 3 0x10008a pause ksh 39678 14934 35603 0 3 0x92 select sshd 35603 230660 1 0 3 0x80 select sshd 99726 276294 20732 73 3 0x100090 kqread syslogd 20732 289867 1 0 3 0x100082 netio syslogd 83416 316634 1 77 3 0x100090 poll dhclient 74791 303777 1 0 3 0x80 poll dhclient 27505 375550 0 0 3 0x14200 bored smr 33085 488969 0 0 2 0x14200 zerothread 4880 226789 0 0 3 0x14200 aiodoned aiodoned 39446 381283 0 0 3 0x14200 syncer update 58945 137928 0 0 3 0x14200 cleaner cleaner 76363 112630 0 0 3 0x14200 reaper reaper 30923 75395 0 0 3 0x14200 pgdaemon pagedaemon 20921 462103 0 0 3 0x14200 bored crynlk 72722 238944 0 0 3 0x14200 bored crypto 5537 90175 0 0 3 0x40014200 acpi0 acpi0 69806 179258 0 0 3 0x14200 bored softnet 82056 167553 0 0 3 0x14200 bored systqmp 55983 361191 0 0 3 0x14200 bored systq 8393 276884 0 0 3 0x40014200 bored softclock 4011 443629 0 0 3 0x40014200 idle0 1 17645 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 9502 6357K 6853K 78643K 10975 0 pcb 15 8K 8K 78643K 89 0 rtable 96 3K 3K 78643K 314 0 ifaddr 74 15K 16K 78643K 129 0 counters 21 16K 16K 78643K 30 0 ioctlops 0 0K 2K 78643K 41 0 iov 0 0K 24K 78643K 72 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 1381 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 52 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 6 17K 25K 78643K 320 0 sigio 0 0K 0K 78643K 6 0 proc 50 38K 63K 78643K 408 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 41 0 in_multi 65 3K 3K 78643K 115 0 ether_multi 2 0K 0K 78643K 14 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 85 387K 387K 78643K 85 0 exec 0 0K 1K 78643K 210 0 pfkey data 0 0K 0K 78643K 2 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 115 38K 54K 78643K 1664 0 UVM aobj 29 2K 3K 78643K 33 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 0K 78643K 77 0 NDP 11 0K 0K 78643K 26 0 temp 126 3022K 3098K 78643K 13383 0 kqueue 3 4K 12K 78643K 30 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 8 0 3 1 0 1 1 0 8 0 rtpcb 80 41 0 39 1 0 1 1 0 8 0 rtentry 112 64 0 26 2 0 2 2 0 8 0 unpcb 120 217 0 209 1 0 1 1 0 8 0 syncache 264 8 0 8 3 2 1 1 0 8 1 tcpqe 32 8 0 8 1 1 0 1 0 8 0 tcpcb 544 150 0 144 1 0 1 1 0 8 0 inpcb 280 521 0 511 4 0 4 4 0 8 3 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 9 0 7 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 0 1 1 0 8 1 ppxss 1128 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 278 0 106 13 0 13 13 0 8 0 art_table 32 280 0 106 2 0 2 2 0 8 0 art_node 16 63 0 27 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 2 1 0 1 1 0 8 0 semapl 112 50 0 40 1 0 1 1 0 8 0 shmpl 112 31 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1948 0 549 46 0 46 46 0 8 0 ffsino 240 1948 0 549 83 0 83 83 0 8 0 nchpl 144 2615 0 1003 60 0 60 60 0 8 0 uvmvnodes 72 2067 0 0 38 0 38 38 0 8 0 vnodes 208 2067 0 0 109 0 109 109 0 8 0 namei 1024 7714 0 7714 1 0 1 1 0 8 1 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 528 3 0 2 1 0 1 1 0 8 0 scxspl 192 8426 0 8426 1 0 1 1 0 8 1 plimitpl 152 43 0 36 1 0 1 1 0 8 0 sigapl 424 508 0 478 4 0 4 4 0 8 0 futexpl 56 8841 0 8840 1 0 1 1 0 8 0 knotepl 112 101 0 82 1 0 1 1 0 8 0 kqueuepl 144 92 0 90 1 0 1 1 0 8 0 pipelkpl 16 145 0 135 1 0 1 1 0 8 0 pipepl 120 290 0 271 1 0 1 1 0 8 0 fdescpl 432 493 0 478 2 0 2 2 0 8 0 filepl 120 3975 0 3876 6 0 6 6 0 8 3 lockfpl 104 207 0 206 1 0 1 1 0 8 0 lockfspl 48 60 0 59 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 22 0 12 1 0 1 1 0 8 0 ucredpl 96 532 0 525 1 0 1 1 0 8 0 zombiepl 144 478 0 478 1 0 1 1 0 8 1 processpl 896 508 0 478 4 0 4 4 0 8 0 procpl 624 954 0 915 4 0 4 4 0 8 0 sosppl 128 8 0 8 1 0 1 1 0 8 1 sockpl 400 806 0 786 7 1 6 6 0 8 4 mcl64k 65536 26 0 26 1 0 1 1 0 8 1 mcl16k 16384 4 0 4 2 1 1 1 0 8 1 mcl12k 12288 9 0 9 1 0 1 1 0 8 1 mcl9k 9216 6 0 6 2 1 1 1 0 8 1 mcl8k 8192 11 0 11 1 0 1 1 0 8 1 mcl4k 4096 47 0 47 1 0 1 1 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 65630 0 65590 13 7 6 11 0 8 0 mtagpl 80 10 0 2 2 1 1 1 0 8 0 mbufpl 256 105690 0 105536 15 1 14 14 0 8 1 bufpl 280 6772 0 1388 385 0 385 385 0 8 0 anonpl 16 63725 0 46713 86 12 74 84 0 107 5 amapchunkpl 152 3518 0 3368 21 12 9 20 0 158 2 amappl16 192 2664 0 1738 58 8 50 58 0 8 3 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 148 0 145 2 1 1 1 0 8 0 amappl13 168 23 0 22 1 0 1 1 0 8 0 amappl12 160 153 0 149 2 1 1 1 0 8 0 amappl11 152 69 0 56 1 0 1 1 0 8 0 amappl10 144 13 0 9 1 0 1 1 0 8 0 amappl9 136 375 0 371 1 0 1 1 0 8 0 amappl8 128 283 0 256 1 0 1 1 0 8 0 amappl7 120 105 0 95 1 0 1 1 0 8 0 amappl6 112 29 0 24 1 0 1 1 0 8 0 amappl5 104 574 0 560 1 0 1 1 0 8 0 amappl4 96 445 0 415 1 0 1 1 0 8 0 amappl3 88 120 0 114 1 0 1 1 0 8 0 amappl2 80 3140 0 3068 3 1 2 3 0 8 0 amappl1 72 18757 0 18337 26 16 10 20 0 8 0 amappl 80 1193 0 1143 2 0 2 2 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 32 0 4 1 0 1 1 0 8 0 uaddrrnd 24 496 0 480 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 496 0 480 1 0 1 1 0 8 0 vmmpekpl 168 7340 0 7311 2 0 2 2 0 8 0 vmmpepl 168 65607 0 63515 119 25 94 113 0 357 3 vmsppl 272 495 0 480 2 0 2 2 0 8 0 pdppl 4096 998 0 961 6 1 5 6 0 8 0 pvpl 32 190723 0 170671 197 12 185 197 0 265 22 pmappl 200 495 0 480 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 157 0 13 5 0 5 5 0 8 0