panic: receive 1a: so 0xfffffd8062f5c320, so_type 3, m 0xfffffd805ad62500, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *230095 8062 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823d8a74) at panic+0x164 sys/kern/subr_prf.c:218 soreceive(fffffd8062f5c320,0,ffff80001d6e1528,0,0,ffff80001d6e1434) at soreceive+0x170a sys/kern/uipc_socket.c:983 soo_read(fffffd8062ff2780,ffff80001d6e1528,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff84f8,6,ffff80001d6e1528,0,ffff80001d6e1610) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff8000ffff84f8,ffff80001d6e15c0,ffff80001d6e1610) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e1690) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6ba0, count: 7 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 receive 1a: so 0xfffffd8062f5c320, so_type 3, m 0xfffffd805ad62500, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823d8a74) at panic+0x164 sys/kern/subr_prf.c:218 soreceive(fffffd8062f5c320,0,ffff80001d6e1528,0,0,ffff80001d6e1434) at soreceive+0x170a sys/kern/uipc_socket.c:983 soo_read(fffffd8062ff2780,ffff80001d6e1528,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff84f8,6,ffff80001d6e1528,0,ffff80001d6e1610) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff8000ffff84f8,ffff80001d6e15c0,ffff80001d6e1610) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e1690) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6ba0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d6e1270 rbx 0xffff80001d6e1320 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff80001d6e1230 r9 0xffffffff815b7cff kprintf+0x15f r10 0x1 r11 0x890578c22cc6c222 r12 0x3000000008 r13 0xffff80001d6e1280 r14 0x100 r15 0x1 rip 0xffffffff82254f08 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d6e1260 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=230095 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff93c8,0xffff8000ffff8290 process=0xffff80001d6c0770 user=0xffff80001d6dc000, vmspace=0xfffffd806bc0a330 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 49287 93055 68369 0 3 0x82 thrsleep syz-execprog 49287 515959 68369 0 3 0x4000082 thrsleep syz-execprog 49287 110420 68369 0 3 0x4000082 wait syz-execprog 49287 469057 68369 0 3 0x4000082 thrsleep syz-execprog 49287 50729 68369 0 3 0x4000082 thrsleep syz-execprog 49287 365864 68369 0 3 0x4000082 kqread syz-execprog 49287 417777 68369 0 3 0x4000082 thrsleep syz-execprog 68369 43941 19870 0 3 0x10008a pause ksh 19870 101929 26516 0 3 0x92 select sshd 2122 82705 1 0 3 0x100083 ttyin getty 26516 441218 1 0 3 0x80 select sshd 26126 222121 61976 73 3 0x100090 kqread syslogd 61976 134796 1 0 3 0x100082 netio syslogd 46392 191504 1 77 2 0x100010 dhclient * 8062 230095 1 0 7 0 dhclient 71105 321998 0 0 3 0x14200 bored smr 62459 122712 0 0 3 0x14200 pgzero zerothread 23410 36512 0 0 3 0x14200 aiodoned aiodoned 39563 313574 0 0 3 0x14200 syncer update 14021 157094 0 0 3 0x14200 cleaner cleaner 94393 222009 0 0 3 0x14200 reaper reaper 77672 351751 0 0 3 0x14200 pgdaemon pagedaemon 95191 319606 0 0 3 0x14200 bored crynlk 60454 110861 0 0 3 0x14200 bored crypto 19411 233418 0 0 3 0x40014200 acpi0 acpi0 49272 95550 0 0 2 0x14200 softnet 36287 153816 0 0 2 0x14200 systqmp 25905 215826 0 0 3 0x14200 bored systq 80556 53053 0 0 3 0x40014200 bored softclock 44198 480852 0 0 3 0x40014200 idle0 1 11583 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 9440 6320K 6320K 78643K 10540 0 pcb 13 8K 8K 78643K 13 0 rtable 61 1K 2K 78643K 155 0 ifaddr 24 7K 9K 78643K 33 0 counters 19 16K 16K 78643K 20 0 ioctlops 0 0K 2K 78643K 14 0 mount 1 1K 1K 78643K 1 0 vnodes 1182 74K 74K 78643K 1187 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 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 2 4K 12K 78643K 18 0 proc 47 38K 54K 78643K 318 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 1K 78643K 22 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 171 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 75 11K 12K 78643K 879 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 6 0 temp 18 3849K 3913K 78643K 1624 0 kqueue 3 4K 4K 78643K 3 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 4 0 2 1 0 1 1 0 8 0 rtpcb 88 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 12 1 0 1 1 0 8 0 unpcb 120 27 0 19 1 0 1 1 0 8 0 syncache 272 5 0 5 2 1 1 1 0 8 1 tcpcb 592 8 0 5 1 0 1 1 0 8 0 inpcb 296 27 0 21 1 0 1 1 0 8 0 nd6 48 3 0 3 1 0 1 1 0 8 1 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 1413 0 22 87 0 87 87 0 8 0 ffsino 240 1413 0 22 82 0 82 82 0 8 0 nchpl 144 1631 0 39 60 0 60 60 0 8 0 uvmvnodes 72 1422 0 0 26 0 26 26 0 8 0 vnodes 208 1422 0 0 75 0 75 75 0 8 0 namei 1024 3939 0 3939 2 1 1 1 0 8 1 scxspl 200 4199 0 4199 1 0 1 1 0 8 1 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 424 212 0 186 4 0 4 4 0 8 0 knotepl 112 48 0 38 1 0 1 1 0 8 0 kqueuepl 152 2 0 0 1 0 1 1 0 8 0 pipepl 272 71 0 64 2 1 1 1 0 8 0 fdescpl 432 198 0 186 2 0 2 2 0 8 0 filepl 120 980 0 927 2 0 2 2 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 120 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 57 0 50 1 0 1 1 0 8 0 zombiepl 144 187 0 186 2 1 1 1 0 8 0 processpl 944 212 0 186 4 0 4 4 0 8 0 procpl 632 218 0 186 3 0 3 3 0 8 0 sockpl 400 71 0 55 2 0 2 2 0 8 0 mcl4k 4096 10 0 10 2 1 1 1 0 8 1 mcl2k 2048 4941 0 4913 6 2 4 6 0 8 0 mtagpl 96 2 0 2 1 1 0 1 0 8 0 mbufpl 256 8796 0 8719 8 1 7 7 0 8 0 bufpl 280 2898 0 116 199 0 199 199 0 8 0 anonpl 16 22205 0 20664 14 2 12 12 0 107 4 amapchunkpl 152 924 0 860 4 0 4 4 0 158 1 amappl16 192 131 0 101 2 0 2 2 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 1 0 0 1 0 1 1 0 8 0 amappl13 168 20 0 18 2 1 1 1 0 8 0 amappl12 160 28 0 24 1 0 1 1 0 8 0 amappl11 152 42 0 33 1 0 1 1 0 8 0 amappl10 144 9 0 6 1 0 1 1 0 8 0 amappl9 136 196 0 195 1 0 1 1 0 8 0 amappl8 128 240 0 226 1 0 1 1 0 8 0 amappl7 120 97 0 89 1 0 1 1 0 8 0 amappl6 112 31 0 26 1 0 1 1 0 8 0 amappl5 104 131 0 122 1 0 1 1 0 8 0 amappl4 96 427 0 403 1 0 1 1 0 8 0 amappl3 88 128 0 119 1 0 1 1 0 8 0 amappl2 80 781 0 726 2 0 2 2 0 8 0 amappl1 72 13450 0 13066 24 7 17 17 0 8 8 amappl 80 456 0 430 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 198 0 186 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 198 0 186 1 0 1 1 0 8 0 vmmpekpl 168 6099 0 6082 1 0 1 1 0 8 0 vmmpepl 168 29418 0 28562 81 12 69 69 0 357 31 vmsppl 272 197 0 186 1 0 1 1 0 8 0 pdppl 4096 402 0 372 5 0 5 5 0 8 0 pvpl 32 106408 0 102698 103 2 101 101 0 265 69 pmappl 200 197 0 186 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 214 0 9 6 0 6 6 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(ffffffff823d8a74) at panic+0x164 sys/kern/subr_prf.c:218 soreceive(fffffd8062f5c320,0,ffff80001d6e1528,0,0,ffff80001d6e1434) at soreceive+0x170a sys/kern/uipc_socket.c:983 soo_read(fffffd8062ff2780,ffff80001d6e1528,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff84f8,6,ffff80001d6e1528,0,ffff80001d6e1610) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff8000ffff84f8,ffff80001d6e15c0,ffff80001d6e1610) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e1690) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6ba0, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823d8a74) at panic+0x164 sys/kern/subr_prf.c:218 soreceive(fffffd8062f5c320,0,ffff80001d6e1528,0,0,ffff80001d6e1434) at soreceive+0x170a sys/kern/uipc_socket.c:983 soo_read(fffffd8062ff2780,ffff80001d6e1528,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff84f8,6,ffff80001d6e1528,0,ffff80001d6e1610) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff8000ffff84f8,ffff80001d6e15c0,ffff80001d6e1610) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e1690) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6ba0, count: -8 ddb>