g Ăg Ăpanic: m_copydata: null mbuf Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 31279 94758 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff822518e6) at panic+0x15c sys/kern/subr_prf.c:207 m_copydata(fffffd806bc22700,6f8,8,fffffd805d56de20) at m_copydata+0x17e m_getptr sys/kern/uipc_mbuf.c:1031 [inline] m_copydata(fffffd806bc22700,6f8,8,fffffd805d56de20) at m_copydata+0x17e sys/kern/uipc_mbuf.c:722 ip6_pullexthdr(fffffd806bc22700,6f8,0) at ip6_pullexthdr+0x16f sys/netinet6/ip6_input.c:1169 ip6_savecontrol(fffffd8068a409d8,fffffd806bc22700,ffff80001e82dd20) at ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1056 rip6_input(ffff80001e82df78,ffff80001e82df84,0,18) at rip6_input+0x75b sys/netinet6/raw_ip6.c:225 ip_deliver(ffff80001e82df78,ffff80001e82df84,0,18) at ip_deliver+0x2e3 sys/netinet/ip_input.c:668 ip6_input_if(ffff80001e82df78,ffff80001e82df84,29,0,ffff80000017a2a8) at ip6_input_if+0xf26 ipv6_input(ffff80000017a2a8,fffffd806bc22700) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff80000017a2a8,fffffd806bc22700,18) at if_input_local+0x121 sys/net/if.c:780 ip6_output(fffffd806bc22f00,ffff800000a03000,fffffd8068a404d0,0,0,fffffd8068a40460) at ip6_output+0xd02 rip6_output(fffffd806bc22f00,fffffd805dac1c88,ffff80001e82e2e0,0) at rip6_output+0x4d7 sys/netinet6/raw_ip6.c:481 rip6_usrreq(fffffd805dac1c88,9,fffffd806bc22f00,0,0,ffff80001d75e398) at rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670 sosend(fffffd805dac1c88,0,ffff80001e82e528,0,0,0) at sosend+0x669 sys/kern/uipc_socket.c:549 end trace frame: 0xffff80001e82e510, 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(ffffffff822518e6) at panic+0x15c sys/kern/subr_prf.c:207 m_copydata(fffffd806bc22700,6f8,8,fffffd805d56de20) at m_copydata+0x17e m_getptr sys/kern/uipc_mbuf.c:1031 [inline] m_copydata(fffffd806bc22700,6f8,8,fffffd805d56de20) at m_copydata+0x17e sys/kern/uipc_mbuf.c:722 ip6_pullexthdr(fffffd806bc22700,6f8,0) at ip6_pullexthdr+0x16f sys/netinet6/ip6_input.c:1169 ip6_savecontrol(fffffd8068a409d8,fffffd806bc22700,ffff80001e82dd20) at ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1056 rip6_input(ffff80001e82df78,ffff80001e82df84,0,18) at rip6_input+0x75b sys/netinet6/raw_ip6.c:225 ip_deliver(ffff80001e82df78,ffff80001e82df84,0,18) at ip_deliver+0x2e3 sys/netinet/ip_input.c:668 ip6_input_if(ffff80001e82df78,ffff80001e82df84,29,0,ffff80000017a2a8) at ip6_input_if+0xf26 ipv6_input(ffff80000017a2a8,fffffd806bc22700) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff80000017a2a8,fffffd806bc22700,18) at if_input_local+0x121 sys/net/if.c:780 ip6_output(fffffd806bc22f00,ffff800000a03000,fffffd8068a404d0,0,0,fffffd8068a40460) at ip6_output+0xd02 rip6_output(fffffd806bc22f00,fffffd805dac1c88,ffff80001e82e2e0,0) at rip6_output+0x4d7 sys/netinet6/raw_ip6.c:481 rip6_usrreq(fffffd805dac1c88,9,fffffd806bc22f00,0,0,ffff80001d75e398) at rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670 sosend(fffffd805dac1c88,0,ffff80001e82e528,0,0,0) at sosend+0x669 sys/kern/uipc_socket.c:549 dofilewritev(ffff80001d75e398,4,ffff80001e82e528,0,ffff80001e82e610) at dofilewritev+0x1ab sys/kern/sys_generic.c:365 sys_write(ffff80001d75e398,ffff80001e82e5c8,ffff80001e82e610) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff80001e82e690) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x68849af1e00, count: -18 ddb> show registers rdi 0xffffffff8128a2c7 db_enter+0x17 rsi 0x2e50 __ALIGN_SIZE+0x1e50 rbp 0xffff80001e82da90 rbx 0xffff80001e82db40 rdx 0x2e51 __ALIGN_SIZE+0x1e51 rcx 0xffff80001d80b000 rax 0xffff80001d80b000 r8 0xffff80001e82da50 r9 0x1 r10 0xffff8000009f9540 r11 0x29ca40a64153358c r12 0x3000000008 r13 0xffff80001e82daa0 r14 0x100 r15 0x1 rip 0xffffffff8128a2c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001e82da80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=31279 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=64, nice=20 forw=0xffffffffffffffff, list=0xffff80001d75d018,0xffffffff825a8148 process=0xffff8000ffff9940 user=0xffff80001e829000, vmspace=0xfffffd806bc0a880 estcpu=14, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 94758 337591 76927 0 2 0 syz-executor.0 *94758 31279 76927 0 7 0x4000000 syz-executor.0 76018 426262 0 0 3 0x14200 acct acct 76490 222211 0 0 3 0x14200 bored sosplice 63146 82048 73617 0 3 0x82 nanosleep syz-executor.1 76927 385486 73617 0 3 0x82 nanosleep syz-executor.0 73617 484485 53222 0 3 0x82 thrsleep syz-fuzzer 73617 241444 53222 0 3 0x4000082 thrsleep syz-fuzzer 73617 434309 53222 0 3 0x4000082 kqread syz-fuzzer 73617 218390 53222 0 3 0x4000082 thrsleep syz-fuzzer 73617 278019 53222 0 3 0x4000082 thrsleep syz-fuzzer 73617 412272 53222 0 3 0x4000082 thrsleep syz-fuzzer 73617 139706 53222 0 3 0x4000082 thrsleep syz-fuzzer 53222 32674 30428 0 3 0x10008a pause ksh 30428 53221 52967 0 3 0x92 select sshd 51694 240656 1 0 3 0x100083 ttyin getty 52967 176997 1 0 3 0x80 select sshd 71395 425847 60430 73 3 0x100090 kqread syslogd 60430 515905 1 0 3 0x100082 netio syslogd 23262 354536 1 77 3 0x100090 poll dhclient 90769 325335 1 0 3 0x80 poll dhclient 40473 497171 0 0 3 0x14200 bored smr 99153 388935 0 0 2 0x14200 zerothread 20486 151808 0 0 3 0x14200 aiodoned aiodoned 594 300916 0 0 3 0x14200 syncer update 41355 216326 0 0 3 0x14200 cleaner cleaner 5569 284139 0 0 3 0x14200 reaper reaper 98344 446457 0 0 3 0x14200 pgdaemon pagedaemon 89233 393134 0 0 3 0x14200 bored crynlk 95576 377902 0 0 3 0x14200 bored crypto 82176 79760 0 0 3 0x40014200 acpi0 acpi0 19203 258347 0 0 3 0x14200 bored softnet 65344 337245 0 0 3 0x14200 bored systqmp 30881 290495 0 0 3 0x14200 bored systq 63167 512623 0 0 3 0x40014200 bored softclock 96137 342035 0 0 3 0x40014200 idle0 1 383618 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 9492 6340K 7632K 78643K 11619 0 pcb 15 8K 8K 78643K 47 0 rtable 105 3K 3K 78643K 221 0 ifaddr 64 12K 12K 78643K 74 0 counters 22 16K 16K 78643K 23 0 ioctlops 0 0K 2K 78643K 19 0 iov 0 0K 12K 78643K 38 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 1498 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 5 13K 25K 78643K 172 0 sigio 0 0K 0K 78643K 8 0 proc 48 38K 54K 78643K 378 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 35 2K 2K 78643K 46 0 ether_multi 2 0K 0K 78643K 7 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 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 193 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 93 21K 31K 78643K 1222 0 UVM aobj 7 2K 2K 78643K 9 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 0K 78643K 14 0 NDP 11 0K 0K 78643K 16 0 temp 91 3033K 3127K 78643K 5248 0 kqueue 3 4K 10K 78643K 23 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 46 0 2 2 0 2 2 0 8 0 unpcb 120 161 0 153 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 285 0 285 1 0 1 1 0 8 1 tcpcb 544 70 0 64 1 0 1 1 0 8 0 inpcb 280 182 0 172 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 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 45 0 5 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 7 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1629 0 231 88 0 88 88 0 8 0 ffsino 240 1629 0 231 83 0 83 83 0 8 0 nchpl 144 2060 0 451 60 0 60 60 0 8 0 uvmvnodes 72 1920 0 0 35 0 35 35 0 8 0 vnodes 208 1920 0 0 102 0 102 102 0 8 0 namei 1024 5443 0 5443 2 1 1 1 0 8 1 scxspl 192 6258 0 6258 1 0 1 1 0 8 1 plimitpl 152 26 0 19 1 0 1 1 0 8 0 sigapl 424 360 0 330 4 0 4 4 0 8 0 futexpl 56 3698 0 3698 1 0 1 1 0 8 1 knotepl 112 73 0 54 1 0 1 1 0 8 0 kqueuepl 144 36 0 33 1 0 1 1 0 8 0 pipelkpl 16 85 0 75 1 0 1 1 0 8 0 pipepl 120 170 0 151 1 0 1 1 0 8 0 fdescpl 432 344 0 330 2 0 2 2 0 8 0 filepl 120 2155 0 2057 4 0 4 4 0 8 0 lockfpl 104 55 0 54 1 0 1 1 0 8 0 lockfspl 48 19 0 18 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 96 246 0 238 1 0 1 1 0 8 0 zombiepl 144 330 0 329 2 1 1 1 0 8 0 processpl 920 360 0 329 4 0 4 4 0 8 0 procpl 624 537 0 499 4 0 4 4 0 8 0 sosppl 128 4 0 4 1 0 1 1 0 8 1 sockpl 400 374 0 354 4 0 4 4 0 8 2 mcl64k 65536 20 0 20 1 0 1 1 0 8 1 mcl12k 12288 7 0 7 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 9 0 9 1 0 1 1 0 8 1 mcl4k 4096 24 0 24 2 1 1 1 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 63485 0 63424 37 21 16 27 0 8 8 mtagpl 80 103 0 3 4 1 3 3 0 8 0 mbufpl 256 101471 0 101190 28 7 21 22 0 8 3 bufpl 280 4333 0 185 297 0 297 297 0 8 0 anonpl 16 44212 0 30324 62 2 60 60 0 107 3 amapchunkpl 152 1916 0 1788 14 1 13 13 0 158 6 amappl16 192 1533 0 776 41 0 41 41 0 8 2 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 22 0 18 1 0 1 1 0 8 0 amappl13 168 25 0 23 1 0 1 1 0 8 0 amappl12 160 84 0 80 2 1 1 1 0 8 0 amappl11 152 118 0 106 1 0 1 1 0 8 0 amappl10 144 13 0 9 1 0 1 1 0 8 0 amappl9 136 20 0 19 1 0 1 1 0 8 0 amappl8 128 264 0 250 1 0 1 1 0 8 0 amappl7 120 108 0 97 1 0 1 1 0 8 0 amappl6 112 86 0 83 2 1 1 1 0 8 0 amappl5 104 1058 0 1048 1 0 1 1 0 8 0 amappl4 96 421 0 399 1 0 1 1 0 8 0 amappl3 88 112 0 105 1 0 1 1 0 8 0 amappl2 80 1965 0 1900 4 2 2 3 0 8 0 amappl1 72 15615 0 15201 26 16 10 20 0 8 0 amappl 80 769 0 729 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 8 0 2 1 0 1 1 0 8 0 uaddrrnd 24 344 0 330 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 344 0 330 1 0 1 1 0 8 0 vmmpekpl 168 6216 0 6189 2 0 2 2 0 8 0 vmmpepl 168 48403 0 46607 114 14 100 100 0 357 20 vmsppl 272 343 0 330 2 0 2 2 0 8 1 pdppl 4096 694 0 660 6 0 6 6 0 8 1 pvpl 32 151396 0 134530 154 4 150 150 0 265 13 pmappl 200 343 0 330 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 277 0 32 8 0 8 8 0 8 0