panic: receive 3: so 0xfffffd805e4d1300, so_type 3, m 0xfffffd806350f900, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *359694 95351 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8218c2cb) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e4d1300,0,ffff80001d37deb8,0,0,ffff80001d37ddc4) at soreceive+0x16e7 soo_read(fffffd8062bfd4b0,ffff80001d37deb8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff8c60,6,ffff80001d37deb8,0,ffff80001d37dfa0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff8c60,ffff80001d37df50,ffff80001d37dfa0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d37e020) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd51d0, 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 0xfffffd805e4d1300, so_type 3, m 0xfffffd806350f900, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8218c2cb) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e4d1300,0,ffff80001d37deb8,0,0,ffff80001d37ddc4) at soreceive+0x16e7 soo_read(fffffd8062bfd4b0,ffff80001d37deb8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff8c60,6,ffff80001d37deb8,0,ffff80001d37dfa0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff8c60,ffff80001d37df50,ffff80001d37dfa0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d37e020) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd51d0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d37dc00 rbx 0xffff80001d37dcb0 rdx 0x2 rcx 0x1 rax 0x1 r8 0xffff80001d37dbc0 r9 0x1 r10 0x6244abc3bd5bfac1 r11 0xb76e6c680aa0436c r12 0x3000000008 r13 0xffff80001d37dc10 r14 0x100 r15 0x1 rip 0xffffffff81af9e88 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d37dbf0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=359694 stat=onproc flags process=0 proc=0 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff84f8,0xffff8000ffff8ee8 process=0xffff8000ffff6010 user=0xffff80001d379000, vmspace=0xfffffd806bc09660 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 3856 86937 26970 0 3 0x82 thrsleep syz-execprog 3856 191811 26970 0 3 0x4000082 nanosleep syz-execprog 3856 405209 26970 0 3 0x4000082 thrsleep syz-execprog 3856 390722 26970 0 3 0x4000082 thrsleep syz-execprog 3856 338095 26970 0 3 0x4000082 wait syz-execprog 3856 409015 26970 0 3 0x4000082 thrsleep syz-execprog 3856 345004 26970 0 3 0x4000082 thrsleep syz-execprog 26970 199933 77735 0 3 0x10008a pause ksh 77735 62666 83188 0 3 0x92 select sshd 54658 440764 1 0 3 0x100083 ttyin getty 83188 468809 1 0 3 0x80 select sshd 3084 314139 20439 73 3 0x100090 kqread syslogd 20439 324214 1 0 3 0x100082 netio syslogd 67270 130187 1 77 2 0x100010 dhclient *95351 359694 1 0 7 0 dhclient 38819 282352 0 0 3 0x14200 pgzero zerothread 8068 129021 0 0 3 0x14200 aiodoned aiodoned 7428 109893 0 0 3 0x14200 syncer update 45463 111834 0 0 3 0x14200 cleaner cleaner 76889 257563 0 0 3 0x14200 reaper reaper 60074 480450 0 0 3 0x14200 pgdaemon pagedaemon 57148 459107 0 0 3 0x14200 bored crynlk 57286 245677 0 0 3 0x14200 bored crypto 11565 124186 0 0 3 0x40014200 acpi0 acpi0 9406 304117 0 0 2 0x14200 softnet 65623 459892 0 0 2 0x14200 systqmp 25399 123796 0 0 3 0x14200 bored systq 38289 14229 0 0 3 0x40014200 bored softclock 47357 121378 0 0 3 0x40014200 idle0 97508 107693 0 0 3 0x14200 bored smr 1 367107 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 6321K 6321K 78643K 10539 0 pcb 13 8K 8K 78643K 13 0 rtable 63 1K 2K 78643K 157 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 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 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 21 3001K 3065K 78643K 3057 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 4019 0 4019 1 0 1 1 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 112 134 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 872 212 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 5501 0 5468 8 3 5 8 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9655 0 9570 10 3 7 7 0 8 0 bufpl 280 5844 0 1326 323 0 323 323 0 8 0 anonpl 16 21198 0 19739 13 0 13 13 0 107 6 amapchunkpl 152 829 0 769 5 0 5 5 0 158 2 amappl16 192 74 0 49 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 amappl12 160 17 0 13 1 0 1 1 0 8 0 amappl11 152 45 0 34 1 0 1 1 0 8 0 amappl10 144 9 0 7 1 0 1 1 0 8 0 amappl9 136 380 0 378 1 0 1 1 0 8 0 amappl8 128 84 0 75 1 0 1 1 0 8 0 amappl7 120 85 0 76 1 0 1 1 0 8 0 amappl6 112 60 0 54 1 0 1 1 0 8 0 amappl5 104 161 0 151 1 0 1 1 0 8 0 amappl4 96 426 0 401 1 0 1 1 0 8 0 amappl3 88 125 0 117 1 0 1 1 0 8 0 amappl2 80 856 0 796 3 0 3 3 0 8 1 amappl1 72 13672 0 13278 25 8 17 20 0 8 8 amappl 80 436 0 411 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 6038 0 6023 1 0 1 1 0 8 0 vmmpepl 168 29615 0 28745 85 7 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 104489 0 100789 113 0 113 113 0 265 82 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 112 127 0 8 4 0 4 4 0 8 0 ddb>