`‹(þâ^ÿa šxñ±äõa²`‹(þâ^ÿa šxñ±äõa²panic: m_copym0: m == NULL and not COPYALL Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *478260 38080 0 0x12 0 0 sshd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8241f67b) at panic+0x15c sys/kern/subr_prf.c:207 m_copym(fffffd8067dfdd00,254,580,2) at m_copym+0x589 sys/kern/uipc_mbuf.c:664 tcp_output(ffff800000ac1ee0) at tcp_output+0x154d sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd805da744b8,9,fffffd8067dfdc00,0,0,ffff80001d71cc40) at tcp_usrreq+0xa54 sosend(fffffd805da744b8,0,ffff80001d6cdb38,0,0,80) at sosend+0x669 sys/kern/uipc_socket.c:555 dofilewritev(ffff80001d71cc40,4,ffff80001d6cdb38,0,ffff80001d6cdc20) at dofilewritev+0x1ab sys/kern/sys_generic.c:365 sys_write(ffff80001d71cc40,ffff80001d6cdbd0,ffff80001d6cdc20) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff80001d6cdca0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff6e10, 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 m_copym0: m == NULL and not COPYALL ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8241f67b) at panic+0x15c sys/kern/subr_prf.c:207 m_copym(fffffd8067dfdd00,254,580,2) at m_copym+0x589 sys/kern/uipc_mbuf.c:664 tcp_output(ffff800000ac1ee0) at tcp_output+0x154d sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd805da744b8,9,fffffd8067dfdc00,0,0,ffff80001d71cc40) at tcp_usrreq+0xa54 sosend(fffffd805da744b8,0,ffff80001d6cdb38,0,0,80) at sosend+0x669 sys/kern/uipc_socket.c:555 dofilewritev(ffff80001d71cc40,4,ffff80001d6cdb38,0,ffff80001d6cdc20) at dofilewritev+0x1ab sys/kern/sys_generic.c:365 sys_write(ffff80001d71cc40,ffff80001d6cdbd0,ffff80001d6cdc20) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff80001d6cdca0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff6e10, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d6cd600 rbx 0xffff80001d6cd6b0 rdx 0x2 rcx 0 rax 0x1 r8 0xffffffff8100dc2f kprintf+0x15f r9 0x1 r10 0x2 r11 0xe63dcba47dfc913e r12 0x3000000008 r13 0xffff80001d6cd610 r14 0x100 r15 0x1 rip 0xffffffff813fae68 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d6cd5f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (sshd) pid=478260 stat=onproc flags process=12 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d71d870,0xffff80001d71c290 process=0xffff80001d7003b8 user=0xffff80001d6c8000, vmspace=0xfffffd806bc0a880 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 32639 470878 21508 0 2 0 syz-executor.1 25065 306661 0 0 3 0x14200 bored sosplice 7061 52493 62192 0 2 0x2 syz-executor.0 21508 105758 62192 0 3 0x82 nanosleep syz-executor.1 62192 362280 42846 0 3 0x82 thrsleep syz-fuzzer 62192 247213 42846 0 2 0x4000482 syz-fuzzer 62192 518351 42846 0 3 0x4000082 thrsleep syz-fuzzer 62192 455674 42846 0 3 0x4000082 thrsleep syz-fuzzer 62192 243157 42846 0 3 0x4000082 thrsleep syz-fuzzer 62192 14774 42846 0 3 0x4000082 thrsleep syz-fuzzer 62192 155331 42846 0 3 0x4000082 thrsleep syz-fuzzer 62192 341199 42846 0 2 0x4000002 syz-fuzzer 42846 89781 38080 0 3 0x10008a pause ksh *38080 478260 88891 0 7 0x12 sshd 12468 32560 1 0 3 0x100083 ttyin getty 88891 228767 1 0 3 0x80 select sshd 98289 176520 32465 73 3 0x100090 kqread syslogd 32465 142045 1 0 3 0x100082 netio syslogd 95791 349284 1 77 3 0x100090 poll dhclient 11663 382349 1 0 3 0x80 poll dhclient 55655 350088 0 0 3 0x14200 bored smr 62743 132663 0 0 3 0x14200 pgzero zerothread 78868 319560 0 0 3 0x14200 aiodoned aiodoned 71293 214666 0 0 3 0x14200 syncer update 96590 510665 0 0 3 0x14200 cleaner cleaner 76070 312312 0 0 3 0x14200 reaper reaper 38991 44379 0 0 3 0x14200 pgdaemon pagedaemon 39435 454513 0 0 3 0x14200 bored crynlk 6524 447509 0 0 3 0x14200 bored crypto 60742 263651 0 0 3 0x40014200 acpi0 acpi0 85851 199655 0 0 3 0x14200 bored softnet 35342 298895 0 0 3 0x14200 bored systqmp 32869 345021 0 0 3 0x14200 bored systq 26415 144450 0 0 3 0x40014200 bored softclock 73693 327696 0 0 3 0x40014200 idle0 1 82253 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 9498 6342K 6859K 78643K 11085 0 pcb 13 8K 8K 78643K 63 0 rtable 140 17K 18K 78643K 400 0 ifaddr 88 18K 19K 78643K 144 0 counters 21 16K 16K 78643K 30 0 ioctlops 0 0K 4K 78643K 194 0 iov 0 0K 12K 78643K 50 0 mount 1 1K 1K 78643K 1 0 vnodes 1223 77K 77K 78643K 1384 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 87 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 298 0 sigio 0 0K 0K 78643K 4 0 proc 49 38K 55K 78643K 405 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 23 0 in_multi 77 3K 3K 78643K 136 0 ether_multi 1 0K 0K 78643K 5 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 217 0 pfkey data 0 0K 1K 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 137 56K 56K 78643K 1561 0 UVM aobj 9 2K 2K 78643K 9 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 46 0 NDP 11 0K 0K 78643K 31 0 temp 113 3872K 3936K 78643K 14567 0 kqueue 3 4K 8K 78643K 16 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 9 0 3 1 0 1 1 0 8 0 rtpcb 80 47 0 45 1 0 1 1 0 8 0 rtentry 112 78 0 31 2 0 2 2 0 8 0 unpcb 120 133 0 125 1 0 1 1 0 8 0 syncache 264 10 0 10 3 2 1 1 0 8 1 tcpqe 32 42 0 42 1 1 0 1 0 8 0 tcpcb 544 112 0 108 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 296 312 0 305 2 0 2 2 0 8 1 nd6 48 19 0 13 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 2 0 2 1 1 0 1 0 8 0 pfrktable 1344 15 0 4 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfrule 1360 106 0 4 9 0 9 9 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 268 0 63 13 0 13 13 0 8 0 art_table 32 270 0 63 2 0 2 2 0 8 0 art_node 16 77 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 12 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 85 0 75 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1777 0 378 88 0 88 88 0 8 0 ffsino 240 1777 0 378 83 0 83 83 0 8 0 nchpl 144 2485 0 897 60 0 60 60 0 8 0 uvmvnodes 72 1949 0 0 36 0 36 36 0 8 0 vnodes 208 1949 0 0 103 0 103 103 0 8 0 namei 1024 6777 0 6777 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 pfiaddrpl 120 8 0 0 1 0 1 1 0 8 0 scxspl 192 7039 0 7039 1 0 1 1 0 8 1 plimitpl 152 31 0 24 1 0 1 1 0 8 0 sigapl 424 482 0 453 4 0 4 4 0 8 0 futexpl 56 5834 0 5834 1 0 1 1 0 8 1 knotepl 112 91 0 72 1 0 1 1 0 8 0 kqueuepl 144 45 0 43 1 0 1 1 0 8 0 pipepl 272 98 0 88 1 0 1 1 0 8 0 fdescpl 432 467 0 453 2 0 2 2 0 8 0 filepl 120 2825 0 2730 4 0 4 4 0 8 1 lockfpl 104 86 0 85 1 0 1 1 0 8 0 lockfspl 48 32 0 31 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 26 0 16 1 0 1 1 0 8 0 ucredpl 96 186 0 179 1 0 1 1 0 8 0 zombiepl 144 453 0 453 1 0 1 1 0 8 1 processpl 928 482 0 453 4 0 4 4 0 8 0 procpl 624 796 0 760 4 0 4 4 0 8 1 sosppl 128 6 0 6 2 1 1 1 0 8 1 sockpl 400 496 0 479 3 0 3 3 0 8 1 mcl64k 65536 28 0 26 1 0 1 1 0 8 0 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 13 0 13 2 1 1 1 0 8 1 mcl9k 9216 3 0 3 2 2 0 1 0 8 0 mcl8k 8192 14 0 14 2 1 1 1 0 8 1 mcl4k 4096 39 0 39 2 1 1 1 0 8 1 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 79182 0 79135 17 10 7 14 0 8 0 mtagpl 96 37 0 8 2 1 1 1 0 8 0 mbufpl 256 133847 0 133448 51 22 29 29 0 8 0 bufpl 280 3890 0 132 269 0 269 269 0 8 0 anonpl 16 68013 0 52423 93 5 88 88 0 107 16 amapchunkpl 152 2056 0 1909 8 1 7 8 0 158 0 amappl16 192 2658 0 1684 68 10 58 61 0 8 8 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 35 0 30 1 0 1 1 0 8 0 amappl13 168 158 0 154 1 0 1 1 0 8 0 amappl12 160 135 0 132 1 0 1 1 0 8 0 amappl11 152 49 0 40 1 0 1 1 0 8 0 amappl10 144 13 0 9 1 0 1 1 0 8 0 amappl9 136 403 0 402 1 0 1 1 0 8 0 amappl8 128 397 0 349 2 0 2 2 0 8 0 amappl7 120 121 0 108 1 0 1 1 0 8 0 amappl6 112 25 0 20 1 0 1 1 0 8 0 amappl5 104 291 0 281 1 0 1 1 0 8 0 amappl4 96 560 0 533 1 0 1 1 0 8 0 amappl3 88 244 0 238 1 0 1 1 0 8 0 amappl2 80 2813 0 2754 2 0 2 2 0 8 0 amappl1 72 18139 0 17743 24 15 9 17 0 8 0 amappl 80 1041 0 998 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 0 1 0 1 1 0 8 0 uaddrrnd 24 471 0 453 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 471 0 453 1 0 1 1 0 8 0 vmmpekpl 168 6878 0 6850 2 0 2 2 0 8 0 vmmpepl 168 63650 0 61590 130 18 112 122 0 357 20 vmsppl 272 470 0 453 3 1 2 2 0 8 0 pdppl 4096 948 0 910 7 1 6 6 0 8 1 pvpl 32 196219 0 177960 207 3 204 204 0 265 38 pmappl 200 470 0 453 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 294 0 38 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8241f67b) at panic+0x15c sys/kern/subr_prf.c:207 m_copym(fffffd8067dfdd00,254,580,2) at m_copym+0x589 sys/kern/uipc_mbuf.c:664 tcp_output(ffff800000ac1ee0) at tcp_output+0x154d sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd805da744b8,9,fffffd8067dfdc00,0,0,ffff80001d71cc40) at tcp_usrreq+0xa54 sosend(fffffd805da744b8,0,ffff80001d6cdb38,0,0,80) at sosend+0x669 sys/kern/uipc_socket.c:555 dofilewritev(ffff80001d71cc40,4,ffff80001d6cdb38,0,ffff80001d6cdc20) at dofilewritev+0x1ab sys/kern/sys_generic.c:365 sys_write(ffff80001d71cc40,ffff80001d6cdbd0,ffff80001d6cdc20) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff80001d6cdca0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff6e10, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8241f67b) at panic+0x15c sys/kern/subr_prf.c:207 m_copym(fffffd8067dfdd00,254,580,2) at m_copym+0x589 sys/kern/uipc_mbuf.c:664 tcp_output(ffff800000ac1ee0) at tcp_output+0x154d sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd805da744b8,9,fffffd8067dfdc00,0,0,ffff80001d71cc40) at tcp_usrreq+0xa54 sosend(fffffd805da744b8,0,ffff80001d6cdb38,0,0,80) at sosend+0x669 sys/kern/uipc_socket.c:555 dofilewritev(ffff80001d71cc40,4,ffff80001d6cdb38,0,ffff80001d6cdc20) at dofilewritev+0x1ab sys/kern/sys_generic.c:365 sys_write(ffff80001d71cc40,ffff80001d6cdbd0,ffff80001d6cdc20) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff80001d6cdca0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff6e10, count: -10