panic: receive 1: so 0xfffffd806f668000, so_type 3, sb_cc 3798 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 299072 93037 0 0x2 0 0 syz-fuzzer * 45641 99871 0 0 0 1K dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821bcb56) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f668000,0,ffff800020abb628,0,0,ffff800020abb534) at soreceive+0x16ec sys/kern/uipc_socket.c:798 soo_read(fffffd8073ffe260,ffff800020abb628,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a6f640,6,ffff800020abb628,0,ffff800020abb710) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020a6f640,ffff800020abb6c0,ffff800020abb710) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020abb790) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020abb790) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc1780, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic receive 1: so 0xfffffd806f668000, so_type 3, sb_cc 3798 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821bcb56) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f668000,0,ffff800020abb628,0,0,ffff800020abb534) at soreceive+0x16ec sys/kern/uipc_socket.c:798 soo_read(fffffd8073ffe260,ffff800020abb628,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a6f640,6,ffff800020abb628,0,ffff800020abb710) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020a6f640,ffff800020abb6c0,ffff800020abb710) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020abb790) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020abb790) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc1780, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020abb370 rbx 0xffff800020abb420 rdx 0xffff800020a6f640 rcx 0 rax 0 r8 0xffffffff81400edf kprintf+0x16f r9 0x1 r10 0x25 r11 0xabc797c97d6cbc7a r12 0x3000000008 r13 0xffff800020abb380 r14 0x100 r15 0x1 rip 0xffffffff815de968 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020abb360 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (dhclient) pid=45641 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a6e008,0xffff800020a6f8c8 process=0xffff800020a9a398 user=0xffff800020ab6000, vmspace=0xfffffd807f0052e0 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 22430 103589 93037 0 2 0x482 syz-executor.1 93037 299072 34553 0 7 0x2 syz-fuzzer 93037 246002 34553 0 3 0x4000082 nanosleep syz-fuzzer 93037 480831 34553 0 3 0x4000082 thrsleep syz-fuzzer 93037 401519 34553 0 3 0x4000082 thrsleep syz-fuzzer 93037 216622 34553 0 3 0x4000082 nanosleep syz-fuzzer 93037 179206 34553 0 3 0x4000082 thrsleep syz-fuzzer 93037 327687 34553 0 3 0x4000082 thrsleep syz-fuzzer 93037 451667 34553 0 3 0x4000082 thrsleep syz-fuzzer 93037 186511 34553 0 3 0x4000082 thrsleep syz-fuzzer 93037 372946 34553 0 3 0x4000082 thrsleep syz-fuzzer 34553 438311 1307 0 3 0x10008a pause ksh 1307 456263 67413 0 3 0x92 select sshd 53212 40062 1 0 3 0x100083 ttyin getty 67413 404033 1 0 3 0x80 select sshd 21030 389873 63809 74 3 0x100092 bpf pflogd 63809 131012 1 0 3 0x80 netio pflogd 78554 13380 67826 73 3 0x100090 kqread syslogd 67826 382526 1 0 3 0x100082 netio syslogd 59393 15242 1 77 2 0x100010 dhclient *99871 45641 1 0 7 0 dhclient 32989 423564 0 0 2 0x14200 zerothread 25477 238988 0 0 3 0x14200 aiodoned aiodoned 20626 64538 0 0 3 0x14200 syncer update 37293 221439 0 0 3 0x14200 cleaner cleaner 91708 387933 0 0 3 0x14200 reaper reaper 35034 450394 0 0 3 0x14200 pgdaemon pagedaemon 83322 215480 0 0 3 0x14200 bored crynlk 73321 420295 0 0 3 0x14200 bored crypto 68339 383864 0 0 3 0x14200 bored viomb 26332 493045 0 0 3 0x40014200 acpi0 acpi0 21798 3163 0 0 3 0x40014200 idle1 59305 163995 0 0 2 0x14200 softnet 29597 112975 0 0 2 0x14200 systqmp 38914 106165 0 0 3 0x14200 bored systq 22000 193521 0 0 3 0x40014200 bored softclock 22498 488129 0 0 3 0x40014200 idle0 86485 19516 0 0 3 0x14200 bored smr 1 353767 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 99871 (dhclient) thread 0xffff800020a6f640 (45641) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8265cfc8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 solock+0x66 sys/kern/uipc_socket2.c:292 #2 soreceive+0x114 sys/kern/uipc_socket.c:706 #3 soo_read+0x53 sys/kern/sys_socket.c:70 #4 dofilereadv+0x1a2 sys/kern/sys_generic.c:236 #5 sys_read+0x83 sys/kern/sys_generic.c:156 #6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9501 6422K 7001K 78643K 10788 0 pcb 13 8K 8K 78643K 41 0 rtable 88 3K 4K 78643K 235 0 ifaddr 46 10K 11K 78643K 68 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1470 0 iov 0 0K 48K 78643K 16 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1339 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 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1810 197K 290K 78643K 12817 0 file desc 4 9K 25K 78643K 101 0 proc 60 63K 83K 78643K 441 0 subproc 23 1K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 24 0 in_multi 22 1K 2K 78643K 41 0 ether_multi 1 0K 0K 78643K 1 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 78 344K 344K 78643K 78 0 exec 0 0K 1K 78643K 209 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 121 22K 26K 78643K 1281 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 10 0 NDP 7 0K 0K 78643K 14 0 temp 97 3025K 3089K 78643K 4657 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 23 0 21 1 0 1 1 0 8 0 rtentry 112 50 0 16 2 0 2 2 0 8 0 unpcb 120 67 0 57 1 0 1 1 0 8 0 syncache 264 4 0 4 2 2 0 1 0 8 0 tcpqe 32 1823 0 1823 1 1 0 1 0 8 0 tcpcb 544 32 0 28 1 0 1 1 0 8 0 inpcb 280 138 0 131 3 1 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 5 0 3 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 17 0 2 1 0 1 1 0 8 0 pfstkey 112 17 0 2 1 0 1 1 0 8 0 pfstate 328 17 0 2 2 0 2 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 236 0 39 14 0 14 14 0 8 0 art_table 32 237 0 39 2 0 2 2 0 8 0 art_node 16 49 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 31 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1594 0 186 46 0 46 46 0 8 0 ffsino 272 1594 0 186 95 0 95 95 0 8 0 nchpl 144 1949 0 342 61 0 61 61 0 8 0 uvmvnodes 72 1678 0 0 31 0 31 31 0 8 0 vnodes 208 1678 0 0 89 0 89 89 0 8 0 namei 1024 5825 0 5825 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 5425 0 5425 8 7 1 7 0 8 1 plimitpl 152 20 0 12 1 0 1 1 0 8 0 sigapl 432 300 0 286 3 1 2 3 0 8 0 futexpl 56 1826 0 1826 1 0 1 1 0 8 1 knotepl 112 54 0 37 1 0 1 1 0 8 0 kqueuepl 104 11 0 9 1 0 1 1 0 8 0 pipepl 160 178 0 163 3 1 2 2 0 8 1 fdescpl 488 301 0 286 3 0 3 3 0 8 0 filepl 152 2400 0 2313 7 1 6 6 0 8 2 lockfpl 104 25 0 24 1 0 1 1 0 8 0 lockfspl 48 10 0 9 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 722 0 713 1 0 1 1 0 8 0 zombiepl 144 287 0 285 3 2 1 1 0 8 0 processpl 904 317 0 285 4 0 4 4 0 8 0 procpl 632 503 0 462 5 0 5 5 0 8 0 sockpl 384 228 0 209 5 2 3 4 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 199 0 0 24 0 24 24 0 8 0 mtagpl 80 8 0 0 1 0 1 1 0 8 0 mbufpl 256 292 0 0 18 1 17 17 0 8 0 bufpl 280 6530 0 1340 371 0 371 371 0 8 0 anonpl 16 46560 0 27693 79 2 77 77 0 125 0 amapchunkpl 152 1490 0 1327 7 0 7 7 0 158 0 amappl16 192 1370 0 350 52 0 52 52 0 8 0 amappl15 184 67 0 63 1 0 1 1 0 8 0 amappl14 176 72 0 67 2 1 1 1 0 8 0 amappl13 168 1 0 0 1 0 1 1 0 8 0 amappl12 160 8 0 6 2 1 1 1 0 8 0 amappl11 152 61 0 45 1 0 1 1 0 8 0 amappl10 144 52 0 44 1 0 1 1 0 8 0 amappl9 136 591 0 588 1 0 1 1 0 8 0 amappl8 128 145 0 115 2 0 2 2 0 8 0 amappl7 120 134 0 121 1 0 1 1 0 8 0 amappl6 112 55 0 49 1 0 1 1 0 8 0 amappl5 104 149 0 135 1 0 1 1 0 8 0 amappl4 96 557 0 521 2 1 1 2 0 8 0 amappl3 88 155 0 147 1 0 1 1 0 8 0 amappl2 80 1480 0 1405 3 1 2 3 0 8 0 amappl1 72 16778 0 16338 26 16 10 20 0 8 0 amappl 80 757 0 708 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 24 301 0 286 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 301 0 286 1 0 1 1 0 8 0 vmmpekpl 168 6294 0 6263 3 1 2 2 0 8 0 vmmpepl 168 44791 0 42638 146 20 126 134 0 357 24 vmsppl 368 300 0 286 2 0 2 2 0 8 0 pdppl 4096 609 0 572 7 1 6 6 0 8 0 pvpl 32 158014 0 135698 192 3 189 189 0 265 7 pmappl 232 300 0 286 2 1 1 2 0 8 0 extentpl 40 50 0 32 1 0 1 1 0 8 0 phpool 112 180 0 6 5 0 5 5 0 8 0