panic: receive 1: so 0xfffffd806f6da000, so_type 3, sb_cc 2458 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 343082 67459 0 0x10 0x4000080 1 syz-executor.0 *111790 97599 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821c5148) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6da000,0,ffff800020abd378,0,0,ffff800020abd284) at soreceive+0x16ec sys/kern/uipc_socket.c:823 soo_read(fffffd8071c1b098,ffff800020abd378,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a7cc38,6,ffff800020abd378,0,ffff800020abd460) at dofilereadv+0x1a1 sys/kern/sys_generic.c:236 sys_read(ffff800020a7cc38,ffff800020abd410,ffff800020abd460) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020abd4e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020abd4e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffda5f0, 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 1: so 0xfffffd806f6da000, so_type 3, sb_cc 2458 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821c5148) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6da000,0,ffff800020abd378,0,0,ffff800020abd284) at soreceive+0x16ec sys/kern/uipc_socket.c:823 soo_read(fffffd8071c1b098,ffff800020abd378,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a7cc38,6,ffff800020abd378,0,ffff800020abd460) at dofilereadv+0x1a1 sys/kern/sys_generic.c:236 sys_read(ffff800020a7cc38,ffff800020abd410,ffff800020abd460) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020abd4e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020abd4e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffda5f0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020abd0c0 rbx 0xffff800020abd170 rdx 0xffff800020a7cc38 rcx 0 rax 0 r8 0xffffffff818f043f kprintf+0x16f r9 0x1 r10 0x25 r11 0x6eaaa43efc07d6d4 r12 0x3000000008 r13 0xffff800020abd0d0 r14 0x100 r15 0x1 rip 0xffffffff81fcbbd8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020abd0b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhclient) pid=111790 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a7c758,0xffff800020a7ceb8 process=0xffff800020a903d0 user=0xffff800020ab8000, vmspace=0xfffffd807efff730 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 67459 234455 17590 0 2 0x10 syz-executor.0 67459 343082 17590 0 7 0x4000090 syz-executor.0 97114 284664 0 0 3 0x14200 bored sosplice 27985 370344 60423 0 2 0x2 syz-executor.1 17590 375876 60423 0 3 0x82 nanosleep syz-executor.0 60423 223301 89796 0 3 0x82 thrsleep syz-fuzzer 60423 66474 89796 0 3 0x4000082 nanosleep syz-fuzzer 60423 85932 89796 0 3 0x4000082 thrsleep syz-fuzzer 60423 143704 89796 0 3 0x4000082 thrsleep syz-fuzzer 60423 12076 89796 0 3 0x4000082 thrsleep syz-fuzzer 60423 50798 89796 0 3 0x4000082 thrsleep syz-fuzzer 60423 397604 89796 0 3 0x4000082 thrsleep syz-fuzzer 60423 280144 89796 0 3 0x4000082 thrsleep syz-fuzzer 60423 480861 89796 0 3 0x4000082 thrsleep syz-fuzzer 60423 37630 89796 0 3 0x4000082 kqread syz-fuzzer 89796 279868 33367 0 3 0x10008a pause ksh 33367 285257 41554 0 3 0x92 select sshd 97832 266771 1 0 3 0x100083 ttyin getty 41554 188279 1 0 3 0x80 select sshd 63483 317620 71792 74 3 0x100092 bpf pflogd 71792 64206 1 0 3 0x80 netio pflogd 22145 99965 38746 73 3 0x100090 kqread syslogd 38746 340678 1 0 3 0x100082 netio syslogd 16979 233530 1 77 3 0x100090 poll dhclient *97599 111790 1 0 7 0 dhclient 88634 235879 0 0 3 0x14200 pgzero zerothread 72443 22060 0 0 3 0x14200 aiodoned aiodoned 2262 425519 0 0 3 0x14200 syncer update 11475 82472 0 0 3 0x14200 cleaner cleaner 91368 68121 0 0 3 0x14200 reaper reaper 19573 458620 0 0 3 0x14200 pgdaemon pagedaemon 1071 467970 0 0 3 0x14200 bored crynlk 52804 119366 0 0 3 0x14200 bored crypto 45823 390729 0 0 3 0x40014200 acpi0 acpi0 66057 92344 0 0 3 0x40014200 idle1 64864 75155 0 0 3 0x14200 bored softnet 5520 439693 0 0 3 0x14200 bored systqmp 58503 459465 0 0 3 0x14200 bored systq 40431 409814 0 0 3 0x40014200 bored softclock 90319 520668 0 0 3 0x40014200 idle0 32818 445791 0 0 3 0x14200 bored smr 1 276174 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 67459 (syz-executor.0) thread 0xffff800020ac24f8 (234455) exclusive rwlock futex r = 0 (0xffffffff82507de0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 sys_futex+0x13d sys/kern/sys_futex.c:116 #2 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #3 Xsyscall+0x128 Process 97599 (dhclient) thread 0xffff800020a7cc38 (111790) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826236a0) #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:236 #5 sys_read+0x83 sys/kern/sys_generic.c:156 #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 9513 6673K 10581K 78643K 11616 0 pcb 20 8K 8K 78643K 127 0 rtable 101 3K 3K 78643K 272 0 ifaddr 68 14K 14K 78643K 101 0 counters 45 34K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1477 0 iov 0 0K 12K 78643K 16 0 mount 1 1K 1K 78643K 1 0 vnodes 1240 78K 78K 78643K 1508 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 36 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 251 0 sigio 0 0K 0K 78643K 4 0 proc 61 63K 95K 78643K 472 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 20 0 in_multi 63 3K 3K 78643K 109 0 ether_multi 1 0K 0K 78643K 9 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 225 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 115 38K 38K 78643K 1738 0 UVM aobj 21 2K 2K 78643K 23 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 48 0 NDP 10 0K 0K 78643K 20 0 temp 103 3013K 3077K 78643K 8364 0 kqueue 3 4K 12K 78643K 33 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 8 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 64 0 22 2 0 2 2 0 8 0 unpcb 120 226 0 210 2 0 2 2 0 8 1 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 96 0 96 1 1 0 1 0 8 0 tcpcb 544 95 0 91 1 0 1 1 0 8 0 inpcb 280 481 0 463 2 0 2 2 0 8 0 nd6 48 9 0 7 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 pffrag 232 3 0 3 2 1 1 1 0 482 1 pffrnode 88 3 0 3 2 1 1 1 0 8 1 pffrent 40 92 0 92 2 1 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 38 0 3 1 0 1 1 0 8 0 pfstkey 112 38 0 3 2 0 2 2 0 8 0 pfstate 328 38 0 3 4 0 4 4 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 256 324 0 141 15 1 14 14 0 8 1 art_table 32 325 0 141 2 0 2 2 0 8 0 art_node 16 63 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 35 0 18 1 0 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 112 34 0 24 1 0 1 1 0 8 0 shmpl 112 21 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1805 0 396 46 0 46 46 0 8 0 ffsino 272 1805 0 396 95 0 95 95 0 8 0 nchpl 144 2357 0 750 61 0 61 61 0 8 0 uvmvnodes 72 2067 0 0 38 0 38 38 0 8 0 vnodes 208 2067 0 0 109 0 109 109 0 8 0 namei 1024 6419 0 6419 1 0 1 1 0 8 1 percpumem 16 36 0 3 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 scxspl 192 7264 0 7264 7 1 6 6 0 8 6 plimitpl 152 31 0 23 1 0 1 1 0 8 0 sigapl 432 450 0 435 3 1 2 3 0 8 0 futexpl 56 4218 0 4218 1 0 1 1 0 8 1 knotepl 112 97 0 78 1 0 1 1 0 8 0 kqueuepl 104 65 0 63 1 0 1 1 0 8 0 pipelkpl 48 123 0 111 1 0 1 1 0 8 0 pipepl 120 246 0 223 2 0 2 2 0 8 0 fdescpl 496 451 0 435 3 0 3 3 0 8 0 filepl 152 2979 0 2861 6 0 6 6 0 8 1 lockfpl 104 37 0 35 1 0 1 1 0 8 0 lockfspl 48 15 0 13 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 96 235 0 225 1 0 1 1 0 8 0 zombiepl 144 435 0 435 1 0 1 1 0 8 1 processpl 960 467 0 435 5 0 5 5 0 8 0 procpl 624 955 0 913 4 0 4 4 0 8 0 sosppl 128 3 0 3 1 0 1 1 0 8 1 sockpl 400 742 0 710 5 0 5 5 0 8 1 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 150 0 0 18 0 18 18 0 8 0 mtagpl 80 14 0 0 1 0 1 1 0 8 0 mbufpl 256 514 0 0 32 0 32 32 0 8 0 bufpl 280 4664 0 193 320 0 320 320 0 8 0 anonpl 16 57128 0 39714 76 1 75 75 0 125 4 amapchunkpl 152 2222 0 2079 8 1 7 8 0 158 0 amappl16 192 2163 0 1216 52 0 52 52 0 8 4 amappl15 184 58 0 55 1 0 1 1 0 8 0 amappl14 176 130 0 127 1 0 1 1 0 8 0 amappl13 168 116 0 115 1 0 1 1 0 8 0 amappl12 160 4 0 4 1 1 0 1 0 8 0 amappl11 152 56 0 40 1 0 1 1 0 8 0 amappl10 144 9 0 6 1 0 1 1 0 8 0 amappl9 136 609 0 605 1 0 1 1 0 8 0 amappl8 128 145 0 117 2 0 2 2 0 8 0 amappl7 120 101 0 90 1 0 1 1 0 8 0 amappl6 112 62 0 51 1 0 1 1 0 8 0 amappl5 104 136 0 120 1 0 1 1 0 8 0 amappl4 96 831 0 795 2 1 1 2 0 8 0 amappl3 88 223 0 214 1 0 1 1 0 8 0 amappl2 80 2699 0 2625 3 1 2 3 0 8 0 amappl1 72 19871 0 19426 26 16 10 20 0 8 0 amappl 80 1211 0 1165 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 22 0 2 1 0 1 1 0 8 0 uaddrrnd 24 452 0 435 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 452 0 435 1 0 1 1 0 8 0 vmmpekpl 168 7154 0 7112 3 0 3 3 0 8 0 vmmpepl 168 62545 0 60415 119 11 108 114 0 357 14 vmsppl 368 451 0 435 2 0 2 2 0 8 0 pdppl 4096 911 0 871 6 0 6 6 0 8 0 pvpl 32 187648 0 167031 181 0 181 181 0 265 13 pmappl 232 451 0 435 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 192 0 4 6 0 6 6 0 8 0