panic: receive 3: so 0xfffffd8036fa5000, so_type 3, m 0xfffffd80391ca100, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *228860 91206 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82184d21) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd8036fa5000,0,ffff800014896048,0,0,ffff800014895f54) at soreceive+0x16e7 soo_read(fffffd80375ca258,ffff800014896048,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff93c8,6,ffff800014896048,0,ffff800014896130) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff93c8,ffff8000148960e0,ffff800014896130) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff8000148961b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe52c0, 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 3: so 0xfffffd8036fa5000, so_type 3, m 0xfffffd80391ca100, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82184d21) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd8036fa5000,0,ffff800014896048,0,0,ffff800014895f54) at soreceive+0x16e7 soo_read(fffffd80375ca258,ffff800014896048,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff93c8,6,ffff800014896048,0,ffff800014896130) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff93c8,ffff8000148960e0,ffff800014896130) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff8000148961b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe52c0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800014895d90 rbx 0xffff800014895e40 rdx 0x2 rcx 0x1 rax 0x1 r8 0xffff800014895d50 r9 0x1 r10 0xb6cf25d6c37b7d37 r11 0x483c42d044b1f045 r12 0x3000000008 r13 0xffff800014895da0 r14 0x100 r15 0x1 rip 0xffffffff819b4bf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800014895d80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=228860 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8770,0xffff8000ffff9650 process=0xffff8000ffff6010 user=0xffff800014891000, vmspace=0xfffffd803f011660 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 69583 223026 96390 0 3 0x82 wait syz-execprog 69583 259009 96390 0 3 0x4000082 nanosleep syz-execprog 69583 469785 96390 0 3 0x4000082 thrsleep syz-execprog 69583 160932 96390 0 3 0x4000082 thrsleep syz-execprog 69583 35355 96390 0 3 0x4000082 thrsleep syz-execprog 69583 381390 96390 0 3 0x4000082 thrsleep syz-execprog 69583 286036 96390 0 3 0x4000082 thrsleep syz-execprog 96390 76586 12339 0 3 0x10008a pause ksh 12339 22568 35398 0 3 0x92 select sshd 69566 63639 1 0 3 0x100083 ttyin getty 35398 141021 1 0 3 0x80 select sshd 63142 323084 25417 73 3 0x100090 kqread syslogd 25417 182356 1 0 3 0x100082 netio syslogd 60697 160953 1 77 2 0x100010 dhclient *91206 228860 1 0 7 0 dhclient 63324 48263 0 0 3 0x14200 pgzero zerothread 29341 340705 0 0 3 0x14200 aiodoned aiodoned 19182 395223 0 0 3 0x14200 syncer update 9498 333838 0 0 3 0x14200 cleaner cleaner 82553 63826 0 0 3 0x14200 reaper reaper 78720 22220 0 0 3 0x14200 pgdaemon pagedaemon 86248 204820 0 0 3 0x14200 bored crynlk 3462 367444 0 0 3 0x14200 bored crypto 48661 295674 0 0 3 0x40014200 acpi0 acpi0 91126 227884 0 0 2 0x14200 softnet 34368 447843 0 0 2 0x14200 systqmp 35911 428962 0 0 3 0x14200 bored systq 87446 16703 0 0 3 0x40014200 bored softclock 76738 236355 0 0 3 0x40014200 idle0 83972 443795 0 0 3 0x14200 bored smr 1 142752 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 10539 0 pcb 13 8K 8K 78643K 13 0 rtable 63 1K 2K 78643K 158 0 ifaddr 24 7K 9K 78643K 33 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 14 0 mount 1 1K 1K 78643K 1 0 vnodes 1180 74K 74K 78643K 1185 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 1794 195K 288K 78643K 12646 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 18 79K 79K 78643K 18 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 859 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 6 0 temp 22 3001K 3065K 78643K 3060 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 80 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 11 1 0 1 1 0 8 0 unpcb 120 27 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 1 0 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 27 0 21 1 0 1 1 0 8 0 nd6 48 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 167 0 0 11 0 11 11 0 8 0 art_table 32 168 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 dino1pl 128 1415 0 20 46 0 46 46 0 8 1 ffsino 240 1415 0 20 83 0 83 83 0 8 0 nchpl 144 1640 0 38 60 0 60 60 0 8 0 uvmvnodes 72 1424 0 0 26 0 26 26 0 8 0 vnodes 208 1424 0 0 75 0 75 75 0 8 0 namei 1024 3864 0 3864 1 0 1 1 0 8 1 scxspl 192 4031 0 4031 2 1 1 2 0 8 1 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 432 197 0 186 2 0 2 2 0 8 0 knotepl 112 39 0 28 1 0 1 1 0 8 0 kqueuepl 104 2 0 0 1 0 1 1 0 8 0 pipepl 128 134 0 122 1 0 1 1 0 8 0 fdescpl 424 198 0 186 2 0 2 2 0 8 0 filepl 120 998 0 946 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 112 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 47 0 40 1 0 1 1 0 8 0 zombiepl 144 187 0 186 1 0 1 1 0 8 0 processpl 864 212 0 186 4 0 4 4 0 8 0 procpl 632 218 0 186 3 0 3 3 0 8 0 sockpl 384 71 0 55 2 0 2 2 0 8 0 mcl4k 4096 10 0 10 1 0 1 1 0 8 1 mcl2k 2048 5477 0 5445 7 2 5 7 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9544 0 9465 9 2 7 7 0 8 0 bufpl 280 5844 0 1353 321 0 321 321 0 8 0 anonpl 16 20301 0 18834 15 2 13 13 0 62 6 amapchunkpl 152 680 0 621 5 0 5 5 0 158 2 amappl16 192 69 0 45 2 0 2 2 0 8 0 amappl15 184 50 0 46 1 0 1 1 0 8 0 amappl14 176 20 0 18 1 0 1 1 0 8 0 amappl13 168 1 0 1 1 1 0 1 0 8 0 amappl12 160 9 0 5 1 0 1 1 0 8 0 amappl11 152 43 0 32 1 0 1 1 0 8 0 amappl10 144 18 0 15 1 0 1 1 0 8 0 amappl9 136 393 0 390 1 0 1 1 0 8 0 amappl8 128 83 0 73 1 0 1 1 0 8 0 amappl7 120 88 0 79 1 0 1 1 0 8 0 amappl6 112 59 0 55 1 0 1 1 0 8 0 amappl5 104 137 0 127 1 0 1 1 0 8 0 amappl4 96 426 0 402 1 0 1 1 0 8 0 amappl3 88 123 0 116 1 0 1 1 0 8 0 amappl2 80 849 0 791 3 0 3 3 0 8 1 amappl1 72 13698 0 13302 26 8 18 20 0 8 8 amappl 80 418 0 393 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 1 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 6055 0 6040 1 0 1 1 0 8 0 vmmpepl 168 29603 0 28732 84 6 78 78 0 357 39 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 103662 0 99966 113 0 113 113 0 265 81 pmappl 200 197 0 186 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 125 0 6 4 0 4 4 0 8 0 ddb>