login: panic: receive 3: so 0xfffffd806f6e9000, so_type 3, m 0xfffffd8079c4c700, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 194474 53945 0 0 0x4000000 1 syz-executor.1 *390977 60056 0 0 0 0K dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821cd7a3) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6e9000,0,ffff800020abcfd8,0,0,ffff800020abcee4) at soreceive+0x1727 soo_read(fffffd806fc81260,ffff800020abcfd8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a7cc38,6,ffff800020abcfd8,0,ffff800020abd0c0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020a7cc38,ffff800020abd070,ffff800020abd0c0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020abd140) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020abd140) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5ac0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic receive 3: so 0xfffffd806f6e9000, so_type 3, m 0xfffffd8079c4c700, m_type 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821cd7a3) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6e9000,0,ffff800020abcfd8,0,0,ffff800020abcee4) at soreceive+0x1727 soo_read(fffffd806fc81260,ffff800020abcfd8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a7cc38,6,ffff800020abcfd8,0,ffff800020abd0c0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020a7cc38,ffff800020abd070,ffff800020abd0c0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020abd140) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020abd140) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5ac0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020abcd20 rbx 0xffff800020abcdd0 rdx 0xffff800020a7cc38 rcx 0 rax 0 r8 0xffffffff81bd1d7f kprintf+0x16f r9 0x1 r10 0x25 r11 0x3c527a337092cdf1 r12 0x3000000008 r13 0xffff800020abcd30 r14 0x100 r15 0x1 rip 0xffffffff818188e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020abcd10 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhclient) pid=390977 stat=onproc flags process=0 proc=0 pri=24, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a7c4e8,0xffff800020a7ceb8 process=0xffff800020a90f10 user=0xffff800020ab8000, vmspace=0xfffffd807f0005c0 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 53945 85801 80307 0 2 0 syz-executor.1 53945 194474 80307 0 7 0x4000000 syz-executor.1 66304 279018 66877 60928 2 0x490 syz-executor.0 66304 282712 66877 60928 3 0x4000090 msgwait syz-executor.0 66304 8079 66877 60928 3 0x4000090 fsleep syz-executor.0 80307 337562 6533 0 2 0x482 syz-executor.1 66877 134311 6533 0 3 0x82 nanosleep syz-executor.0 6533 77636 70152 0 3 0x82 thrsleep syz-fuzzer 6533 216963 70152 0 2 0x4000482 syz-fuzzer 6533 18045 70152 0 3 0x4000082 thrsleep syz-fuzzer 6533 353217 70152 0 3 0x4000082 thrsleep syz-fuzzer 6533 224884 70152 0 3 0x4000082 thrsleep syz-fuzzer 6533 328889 70152 0 2 0x4000482 syz-fuzzer 6533 326541 70152 0 3 0x4000082 thrsleep syz-fuzzer 6533 291840 70152 0 3 0x4000082 thrsleep syz-fuzzer 6533 194477 70152 0 3 0x4000082 kqread syz-fuzzer 6533 389909 70152 0 3 0x4000082 thrsleep syz-fuzzer 70152 372812 41950 0 3 0x10008a pause ksh 41950 102086 85487 0 3 0x92 select sshd 5631 239152 1 0 3 0x100083 ttyin getty 85487 297019 1 0 3 0x80 select sshd 81321 312441 22392 74 3 0x100092 bpf pflogd 22392 32934 1 0 3 0x80 netio pflogd 17192 72870 31929 73 3 0x100090 kqread syslogd 31929 213961 1 0 3 0x100082 netio syslogd 22031 168919 1 77 3 0x100090 poll dhclient *60056 390977 1 0 7 0 dhclient 96267 389068 0 0 3 0x14200 pgzero zerothread 79221 396130 0 0 3 0x14200 aiodoned aiodoned 44177 80551 0 0 3 0x14200 syncer update 79266 205099 0 0 3 0x14200 cleaner cleaner 80263 385368 0 0 3 0x14200 reaper reaper 86101 297962 0 0 3 0x14200 pgdaemon pagedaemon 32889 362638 0 0 3 0x14200 bored crynlk 606 455092 0 0 3 0x14200 bored crypto 32684 335758 0 0 3 0x40014200 acpi0 acpi0 81575 41847 0 0 3 0x40014200 idle1 96606 477025 0 0 3 0x14200 bored softnet 9376 339973 0 0 3 0x14200 bored systqmp 91558 179139 0 0 3 0x14200 bored systq 58388 38010 0 0 3 0x40014200 bored softclock 26655 275271 0 0 3 0x40014200 idle0 77905 22830 0 0 3 0x14200 bored smr 1 62827 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 60056 (dhclient) thread 0xffff800020a7cc38 (390977) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8267c0b0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 solock+0x66 sys/kern/uipc_socket2.c:292 #2 soreceive+0x114 sys/kern/uipc_socket.c:731 #3 soo_read+0x53 sys/kern/sys_socket.c:70 #4 dofilereadv+0x1a1 sys/kern/sys_generic.c:237 #5 sys_read+0x83 sys/kern/sys_generic.c:157 #6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9482 6473K 6722K 78643K 10630 0 pcb 15 8K 8K 78643K 30 0 rtable 105 3K 3K 78643K 201 0 ifaddr 49 11K 11K 78643K 52 0 counters 45 34K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1469 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1239 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 25K 78643K 54 0 proc 60 63K 95K 78643K 444 0 subproc 32 2K 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 11 0 in_multi 33 2K 2K 78643K 35 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 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 207 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 111 22K 22K 78643K 1075 0 UVM aobj 13 2K 2K 78643K 13 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 11 0K 0K 78643K 11 0 temp 78 3021K 3085K 78643K 2115 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 49 0 39 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 16 0 12 1 0 1 1 0 8 0 inpcb 280 74 0 65 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 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 12 0 0 1 0 1 1 0 8 0 pfstkey 112 12 0 0 1 0 1 1 0 8 0 pfstate 328 12 0 0 1 0 1 1 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 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 6 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1451 0 42 46 0 46 46 0 8 0 ffsino 272 1451 0 42 94 0 94 94 0 8 0 nchpl 144 1707 0 86 61 0 61 61 0 8 0 uvmvnodes 72 1510 0 0 28 0 28 28 0 8 0 vnodes 208 1510 0 0 80 0 80 80 0 8 0 namei 1024 4377 0 4377 1 0 1 1 0 8 1 percpumem 16 33 0 0 1 0 1 1 0 8 0 scxspl 192 4935 0 4935 2 1 1 2 0 8 1 plimitpl 152 19 0 11 1 0 1 1 0 8 0 sigapl 432 253 0 237 3 0 3 3 0 8 1 futexpl 56 468 0 467 1 0 1 1 0 8 0 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 144 7 0 4 1 0 1 1 0 8 0 pipelkpl 48 76 0 66 1 0 1 1 0 8 0 pipepl 120 152 0 133 1 0 1 1 0 8 0 fdescpl 496 254 0 237 3 0 3 3 0 8 0 filepl 152 1293 0 1186 5 0 5 5 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 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 78 0 68 1 0 1 1 0 8 0 zombiepl 144 237 0 237 1 0 1 1 0 8 1 processpl 960 269 0 237 5 0 5 5 0 8 0 procpl 624 320 0 276 4 0 4 4 0 8 0 sockpl 400 142 0 121 4 0 4 4 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 147 0 0 18 0 18 18 0 8 0 mtagpl 80 2 0 0 1 0 1 1 0 8 0 mbufpl 256 168 0 0 10 0 10 10 0 8 0 bufpl 280 4076 0 173 279 0 279 279 0 8 0 anonpl 16 38851 0 23628 63 1 62 62 0 124 0 amapchunkpl 152 1165 0 1023 8 0 8 8 0 158 2 amappl16 192 1023 0 200 42 0 42 42 0 8 0 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 11 0 9 2 1 1 1 0 8 0 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 3 0 2 2 1 1 1 0 8 0 amappl11 152 70 0 52 1 0 1 1 0 8 0 amappl10 144 18 0 11 1 0 1 1 0 8 0 amappl9 136 401 0 396 1 0 1 1 0 8 0 amappl8 128 323 0 300 1 0 1 1 0 8 0 amappl7 120 129 0 116 1 0 1 1 0 8 0 amappl6 112 24 0 22 2 1 1 1 0 8 0 amappl5 104 146 0 130 1 0 1 1 0 8 0 amappl4 96 499 0 469 2 0 2 2 0 8 1 amappl3 88 104 0 98 1 0 1 1 0 8 0 amappl2 80 1109 0 1029 3 0 3 3 0 8 1 amappl1 72 15704 0 15254 25 7 18 20 0 8 8 amappl 80 572 0 525 2 0 2 2 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 254 0 237 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 254 0 237 1 0 1 1 0 8 0 vmmpekpl 168 5916 0 5884 2 0 2 2 0 8 0 vmmpepl 168 38251 0 36191 120 7 113 113 0 357 23 vmsppl 368 253 0 237 2 0 2 2 0 8 0 pdppl 4096 515 0 474 6 0 6 6 0 8 0 pvpl 32 133568 0 115163 149 0 149 149 0 265 0 pmappl 232 253 0 237 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 163 0 3 5 0 5 5 0 8 0