login: panic: receive 3: so 0xfffffd806f6cf600, so_type 3, m 0xfffffd806d623600, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 377148 54867 0 0x2 0x4000000 0 syz-execprog *324942 79525 0 0 0 1K dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6cf600,0,ffff800020aa5378,0,0,ffff800020aa5284) at soreceive+0x1727 soo_read(fffffd806fc06000,ffff800020aa5378,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a5ef38,6,ffff800020aa5378,0,ffff800020aa5460) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020a5ef38,ffff800020aa5410,ffff800020aa5460) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020aa54e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020aa54e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8d90, 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 3: so 0xfffffd806f6cf600, so_type 3, m 0xfffffd806d623600, m_type 0 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6cf600,0,ffff800020aa5378,0,0,ffff800020aa5284) at soreceive+0x1727 soo_read(fffffd806fc06000,ffff800020aa5378,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a5ef38,6,ffff800020aa5378,0,ffff800020aa5460) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020a5ef38,ffff800020aa5410,ffff800020aa5460) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020aa54e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020aa54e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8d90, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020aa50c0 rbx 0xffff800020aa5170 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81a61d1f kprintf+0x16f r9 0x1 r10 0xa824093b6b342086 r11 0xe5b08bfd082cd840 r12 0x3000000008 r13 0xffff800020aa50d0 r14 0x100 r15 0x1 rip 0xffffffff8157cc78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020aa50b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (dhclient) pid=324942 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a5e008,0xffff800020a5f1d0 process=0xffff800020a78750 user=0xffff800020aa0000, vmspace=0xfffffd807f008450 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54867 242123 66736 0 3 0x82 thrsleep syz-execprog 54867 435885 66736 0 3 0x4000082 nanosleep syz-execprog 54867 491779 66736 0 3 0x4000082 thrsleep syz-execprog 54867 36589 66736 0 3 0x4000082 thrsleep syz-execprog 54867 504624 66736 0 3 0x4000082 thrsleep syz-execprog 54867 484337 66736 0 3 0x4000082 nanosleep syz-execprog 54867 377148 66736 0 7 0x4000002 syz-execprog 54867 383136 66736 0 3 0x4000082 thrsleep syz-execprog 66736 286815 17285 0 3 0x10008a pause ksh 17285 184035 52290 0 3 0x92 select sshd 69806 390119 1 0 3 0x100083 ttyin getty 52290 497078 1 0 3 0x80 select sshd 9101 7384 11912 74 3 0x100092 bpf pflogd 11912 55543 1 0 3 0x80 netio pflogd 89953 174686 10094 73 3 0x100090 kqread syslogd 10094 366290 1 0 3 0x100082 netio syslogd 86221 438423 1 77 3 0x100090 poll dhclient *79525 324942 1 0 7 0 dhclient 80924 205632 0 0 3 0x14200 pgzero zerothread 76443 212880 0 0 3 0x14200 aiodoned aiodoned 33744 304135 0 0 3 0x14200 syncer update 83760 431859 0 0 3 0x14200 cleaner cleaner 60991 54303 0 0 3 0x14200 reaper reaper 83797 396526 0 0 3 0x14200 pgdaemon pagedaemon 8143 47969 0 0 3 0x14200 bored crynlk 53075 27419 0 0 3 0x14200 bored crypto 85099 105653 0 0 3 0x40014200 acpi0 acpi0 42135 315392 0 0 3 0x40014200 idle1 33805 19769 0 0 3 0x14200 bored softnet 94273 227840 0 0 3 0x14200 bored systqmp 91670 289020 0 0 3 0x14200 bored systq 91572 91335 0 0 3 0x40014200 bored softclock 84760 303678 0 0 3 0x40014200 idle0 1346 524278 0 0 3 0x14200 bored smr 1 150303 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 79525 (dhclient) thread 0xffff800020a5ef38 (324942) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82687c48) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 solock+0x66 sys/kern/uipc_socket2.c:292 #2 soreceive+0xb3a sys/kern/uipc_socket.c:925 #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 9461 6393K 6395K 78643K 10556 0 pcb 13 8K 8K 78643K 13 0 rtable 67 2K 2K 78643K 165 0 ifaddr 31 8K 9K 78643K 39 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1468 0 mount 1 1K 1K 78643K 1 0 vnodes 1181 74K 74K 78643K 1186 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 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 1 0K 12K 78643K 18 0 proc 59 63K 83K 78643K 398 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 197 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 67 3K 12K 78643K 951 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 4 0K 0K 78643K 7 0 temp 28 3565K 3629K 78643K 3291 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 4 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 96 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 9 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 280 5 0 5 2 1 1 1 0 8 1 tcpqe 32 9 0 9 1 1 0 1 0 8 0 tcpcb 640 8 0 5 1 0 1 1 0 8 0 inpcb 280 34 0 28 1 0 1 1 0 8 0 nd6 48 2 0 2 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 11 0 7 1 0 1 1 0 8 0 pfstkey 112 11 0 7 1 0 1 1 0 8 0 pfstate 328 11 0 7 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 256 167 0 47 11 0 11 11 0 8 2 art_table 32 168 0 47 2 0 2 2 0 8 0 art_node 16 33 0 12 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1421 0 20 46 0 46 46 0 8 0 ffsino 272 1421 0 20 94 0 94 94 0 8 0 nchpl 144 1647 0 39 61 1 60 60 0 8 0 uvmvnodes 72 1431 0 0 27 0 27 27 0 8 0 vnodes 208 1431 0 0 76 0 76 76 0 8 0 namei 1024 4135 0 4135 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 208 4243 0 4243 11 10 1 7 0 8 1 plimitpl 152 15 0 9 1 0 1 1 0 8 0 sigapl 432 224 0 212 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 160 148 0 138 2 1 1 1 0 8 0 fdescpl 488 225 0 212 3 0 3 3 0 8 0 filepl 152 1114 0 1059 3 0 3 3 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 128 19 0 10 1 0 1 1 0 8 0 pgrppl 48 19 0 10 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 212 0 212 2 1 1 1 0 8 1 processpl 928 240 0 212 5 0 5 5 0 8 1 procpl 648 247 0 212 4 0 4 4 0 8 1 srpgc 80 2 0 0 1 0 1 1 0 8 0 sockpl 384 80 0 62 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 75 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 125 0 0 6 0 6 6 0 8 0 bufpl 280 5882 0 1309 327 0 327 327 0 8 0 anonpl 16 21975 0 20416 15 2 13 13 0 124 5 amapchunkpl 152 750 0 686 5 0 5 5 0 158 2 amappl16 192 152 0 124 2 0 2 2 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 45 0 41 1 0 1 1 0 8 0 amappl13 168 2 0 2 1 0 1 1 0 8 1 amappl12 160 6 0 5 2 1 1 1 0 8 0 amappl11 152 53 0 38 1 0 1 1 0 8 0 amappl10 144 10 0 7 1 0 1 1 0 8 0 amappl9 136 445 0 444 1 0 1 1 0 8 0 amappl8 128 127 0 115 1 0 1 1 0 8 0 amappl7 120 36 0 31 1 0 1 1 0 8 0 amappl6 112 58 0 51 1 0 1 1 0 8 0 amappl5 104 126 0 112 1 0 1 1 0 8 0 amappl4 96 493 0 464 1 0 1 1 0 8 0 amappl3 88 115 0 110 1 0 1 1 0 8 0 amappl2 80 947 0 890 4 1 3 3 0 8 1 amappl1 72 14950 0 14539 25 7 18 20 0 8 8 amappl 80 475 0 449 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 24 225 0 212 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 225 0 212 1 0 1 1 0 8 0 vmmpekpl 168 6508 0 6482 2 0 2 2 0 8 0 vmmpepl 168 32297 0 31411 93 13 80 80 0 357 38 vmsppl 368 224 0 212 2 0 2 2 0 8 0 pdppl 4096 457 0 424 6 0 6 6 0 8 1 pvpl 32 112221 0 108314 120 5 115 115 0 265 81 pmappl 232 224 0 212 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 140 0 4 4 0 4 4 0 8 0