panic: receive 1: so 0xfffffd806f6f2000, so_type 3, sb_cc 4434 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 373361 78784 0 0 0x1 1 syz-executor.0 *427523 44761 0 0 0 0K dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821dec66) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6f2000,0,ffff800020abd248,0,0,ffff800020abd154) at soreceive+0x16ec sys/kern/uipc_socket.c:823 soo_read(fffffd806fc83000,ffff800020abd248,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a7c4e8,6,ffff800020abd248,0,ffff800020abd330) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020a7c4e8,ffff800020abd2e0,ffff800020abd330) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020abd3b0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020abd3b0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcf2e0, 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 0xfffffd806f6f2000, so_type 3, sb_cc 4434 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821dec66) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f6f2000,0,ffff800020abd248,0,0,ffff800020abd154) at soreceive+0x16ec sys/kern/uipc_socket.c:823 soo_read(fffffd806fc83000,ffff800020abd248,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a7c4e8,6,ffff800020abd248,0,ffff800020abd330) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020a7c4e8,ffff800020abd2e0,ffff800020abd330) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020abd3b0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020abd3b0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcf2e0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020abcf90 rbx 0xffff800020abd040 rdx 0xffff800020a7c4e8 rcx 0 rax 0 r8 0xffffffff8151a22f kprintf+0x16f r9 0x1 r10 0x25 r11 0xff68df4d2c0afafc r12 0x3000000008 r13 0xffff800020abcfa0 r14 0x100 r15 0x1 rip 0xffffffff8106a8b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020abcf80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhclient) pid=427523 stat=onproc flags process=0 proc=0 pri=24, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a7d5f8,0xffff800020a7c018 process=0xffff800020a90b50 user=0xffff800020ab8000, vmspace=0xfffffd807f000000 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78784 373361 84635 0 7 0x1 syz-executor.0 78784 352627 84635 0 2 0x4000000 syz-executor.0 19590 133567 0 0 3 0x14200 bored sosplice 45004 435073 65950 0 3 0x82 nanosleep syz-executor.1 84635 242646 65950 0 2 0x482 syz-executor.0 65950 402768 95757 0 3 0x82 kqread syz-fuzzer 65950 378314 95757 0 3 0x4000082 nanosleep syz-fuzzer 65950 474326 95757 0 3 0x4000082 thrsleep syz-fuzzer 65950 332025 95757 0 3 0x4000082 thrsleep syz-fuzzer 65950 48307 95757 0 3 0x4000082 thrsleep syz-fuzzer 65950 407415 95757 0 3 0x4000082 thrsleep syz-fuzzer 65950 280323 95757 0 3 0x4000082 thrsleep syz-fuzzer 65950 455791 95757 0 3 0x4000082 thrsleep syz-fuzzer 65950 142965 95757 0 3 0x4000082 thrsleep syz-fuzzer 65950 93244 95757 0 3 0x4000082 thrsleep syz-fuzzer 95757 362826 78764 0 3 0x10008a pause ksh 78764 489874 99084 0 3 0x92 select sshd 75069 385082 1 0 3 0x100083 ttyin getty 99084 9979 1 0 3 0x80 select sshd 81142 433649 83687 74 3 0x100092 bpf pflogd 83687 125641 1 0 3 0x80 netio pflogd 62212 504399 48233 73 3 0x100090 kqread syslogd 48233 359046 1 0 3 0x100082 netio syslogd 18970 146763 1 77 3 0x100090 poll dhclient *44761 427523 1 0 7 0 dhclient 17060 184379 0 0 2 0x14200 zerothread 86469 166621 0 0 3 0x14200 aiodoned aiodoned 52148 93467 0 0 3 0x14200 syncer update 78916 125419 0 0 3 0x14200 cleaner cleaner 40792 189827 0 0 3 0x14200 reaper reaper 29600 278543 0 0 3 0x14200 pgdaemon pagedaemon 48760 23682 0 0 3 0x14200 bored crynlk 54004 375695 0 0 3 0x14200 bored crypto 46451 10562 0 0 3 0x40014200 acpi0 acpi0 50489 424310 0 0 3 0x40014200 idle1 43567 344573 0 0 3 0x14200 bored softnet 76891 164007 0 0 3 0x14200 bored systqmp 78026 359397 0 0 2 0x14200 systq 2212 273604 0 0 3 0x40014200 bored softclock 50738 157605 0 0 3 0x40014200 idle0 67912 150504 0 0 3 0x14200 bored smr 1 470587 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 44761 (dhclient) thread 0xffff800020a7c4e8 (427523) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8262d5b0) #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 9506 6538K 7309K 78643K 10920 0 pcb 13 8K 8K 78643K 55 0 rtable 93 2K 3K 78643K 270 0 ifaddr 59 12K 12K 78643K 87 0 counters 45 34K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1478 0 iov 0 0K 12K 78643K 21 0 mount 1 1K 1K 78643K 1 0 vnodes 1230 77K 77K 78643K 1327 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 1K 1K 78643K 21 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 143 0 sigio 0 0K 0K 78643K 2 0 proc 63 63K 95K 78643K 466 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 18 0 in_multi 36 2K 2K 78643K 75 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 221 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 117 38K 54K 78643K 1423 0 UVM aobj 16 2K 2K 78643K 16 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 29 0 NDP 9 0K 0K 78643K 20 0 temp 110 3023K 3087K 78643K 2523 0 kqueue 3 4K 14K 78643K 18 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 21 0 19 1 0 1 1 0 8 0 rtentry 112 64 0 26 2 0 2 2 0 8 0 unpcb 120 126 0 116 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 579 0 579 1 1 0 1 0 8 0 tcpcb 544 60 0 56 1 0 1 1 0 8 0 inpcb 280 224 0 217 2 0 2 2 0 8 1 rttmr 72 2 0 2 1 0 1 1 0 8 1 nd6 48 11 0 9 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 5 0 5 1 0 1 1 0 482 1 pffrnode 88 5 0 5 1 0 1 1 0 8 1 pffrent 40 225 0 225 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 28 0 2 1 0 1 1 0 8 0 pfstkey 112 28 0 2 1 0 1 1 0 8 0 pfstate 328 28 0 2 3 0 3 3 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 256 299 0 142 13 0 13 13 0 8 2 art_table 32 300 0 142 2 0 2 2 0 8 0 art_node 16 63 0 27 1 0 1 1 0 8 0 sysvmsgpl 40 49 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 19 0 9 1 0 1 1 0 8 0 shmpl 112 14 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1605 0 198 46 0 46 46 0 8 0 ffsino 272 1605 0 198 94 0 94 94 0 8 0 nchpl 144 2044 0 435 61 0 61 61 0 8 0 uvmvnodes 72 1727 0 0 32 0 32 32 0 8 0 vnodes 208 1727 0 0 91 0 91 91 0 8 0 namei 1024 5808 0 5808 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 5864 0 5864 8 1 7 7 0 8 7 plimitpl 152 21 0 13 1 0 1 1 0 8 0 sigapl 432 342 0 327 3 1 2 3 0 8 0 futexpl 56 2910 0 2910 1 0 1 1 0 8 1 knotepl 112 74 0 55 1 0 1 1 0 8 0 kqueuepl 144 32 0 30 1 0 1 1 0 8 0 pipelkpl 48 110 0 100 1 0 1 1 0 8 0 pipepl 120 220 0 201 1 0 1 1 0 8 0 fdescpl 496 343 0 327 3 0 3 3 0 8 0 filepl 152 2403 0 2302 5 0 5 5 0 8 1 lockfpl 104 47 0 46 1 0 1 1 0 8 0 lockfspl 48 17 0 16 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 96 386 0 377 1 0 1 1 0 8 0 zombiepl 144 327 0 326 1 0 1 1 0 8 0 processpl 960 359 0 326 5 0 5 5 0 8 0 procpl 624 649 0 606 4 0 4 4 0 8 0 sosppl 128 3 0 3 1 1 0 1 0 8 0 sockpl 400 373 0 354 4 0 4 4 0 8 2 mcl64k 65536 6 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 mcl9k 9216 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 172 0 0 21 0 21 21 0 8 0 mtagpl 80 23 0 0 1 0 1 1 0 8 0 mbufpl 256 426 0 0 26 0 26 26 0 8 0 bufpl 280 4197 0 176 288 0 288 288 0 8 0 anonpl 16 46112 0 29678 68 1 67 67 0 124 0 amapchunkpl 152 2165 0 2027 20 0 20 20 0 158 13 amappl16 192 1472 0 580 45 0 45 45 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 58 0 55 2 1 1 1 0 8 0 amappl13 168 80 0 78 1 0 1 1 0 8 0 amappl12 160 10 0 5 1 0 1 1 0 8 0 amappl11 152 72 0 54 1 0 1 1 0 8 0 amappl10 144 33 0 23 1 0 1 1 0 8 0 amappl9 136 389 0 386 1 0 1 1 0 8 0 amappl8 128 322 0 296 1 0 1 1 0 8 0 amappl7 120 121 0 108 1 0 1 1 0 8 0 amappl6 112 29 0 24 1 0 1 1 0 8 0 amappl5 104 243 0 226 1 0 1 1 0 8 0 amappl4 96 557 0 527 1 0 1 1 0 8 0 amappl3 88 107 0 102 1 0 1 1 0 8 0 amappl2 80 1812 0 1741 3 1 2 3 0 8 0 amappl1 72 17693 0 17256 25 15 10 20 0 8 0 amappl 80 902 0 857 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 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 344 0 327 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 344 0 327 1 0 1 1 0 8 0 vmmpekpl 168 6755 0 6715 2 0 2 2 0 8 0 vmmpepl 168 48820 0 46781 117 8 109 112 0 357 15 vmsppl 368 343 0 327 2 0 2 2 0 8 0 pdppl 4096 695 0 655 6 0 6 6 0 8 0 pvpl 32 157344 0 137779 163 0 163 163 0 265 3 pmappl 232 343 0 327 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 184 0 3 6 0 6 6 0 8 0