panic: receive 1: so 0xfffffd806f66c000, so_type 3, sb_cc 3774 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 440986 84966 0 0x2 0x4000000 0 syz-fuzzer *126214 80077 0 0 0 1K dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821bff33) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f66c000,0,ffff800020ab5208,0,0,ffff800020ab5114) at soreceive+0x16ec sys/kern/uipc_socket.c:798 soo_read(fffffd807d7f61c8,ffff800020ab5208,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a6e008,6,ffff800020ab5208,0,ffff800020ab52f0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020a6e008,ffff800020ab52a0,ffff800020ab52f0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020ab5370) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020ab5370) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd7950, 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 0xfffffd806f66c000, so_type 3, sb_cc 3774 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821bff33) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806f66c000,0,ffff800020ab5208,0,0,ffff800020ab5114) at soreceive+0x16ec sys/kern/uipc_socket.c:798 soo_read(fffffd807d7f61c8,ffff800020ab5208,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff800020a6e008,6,ffff800020ab5208,0,ffff800020ab52f0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020a6e008,ffff800020ab52a0,ffff800020ab52f0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020ab5370) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020ab5370) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd7950, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020ab4f50 rbx 0xffff800020ab5000 rdx 0xffff800020a6e008 rcx 0 rax 0 r8 0xffffffff81962f3f kprintf+0x16f r9 0x1 r10 0x25 r11 0xbe88541715a148ef r12 0x3000000008 r13 0xffff800020ab4f60 r14 0x100 r15 0x1 rip 0xffffffff816ef798 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020ab4f40 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (dhclient) pid=126214 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a6f150,0xffff800020a6e508 process=0xffff800020a9a010 user=0xffff800020ab0000, vmspace=0xfffffd807f0082e0 estcpu=0, cpticks=1, pctcpu=0.1 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96472 156971 0 0 3 0x14200 acct acct 52755 320842 0 0 3 0x14200 bored sosplice 96929 25059 84966 0 3 0x2 biowait syz-executor.1 84966 387936 92535 0 3 0x82 kqread syz-fuzzer 84966 292719 92535 0 3 0x4000082 nanosleep syz-fuzzer 84966 227135 92535 0 3 0x4000082 thrsleep syz-fuzzer 84966 375608 92535 0 3 0x4000082 thrsleep syz-fuzzer 84966 391908 92535 0 3 0x4000082 thrsleep syz-fuzzer 84966 233270 92535 0 3 0x4000082 thrsleep syz-fuzzer 84966 440986 92535 0 7 0x4000002 syz-fuzzer 84966 213381 92535 0 3 0x4000082 thrsleep syz-fuzzer 84966 24914 92535 0 3 0x4000082 thrsleep syz-fuzzer 84966 481848 92535 0 3 0x4000082 nanosleep syz-fuzzer 92535 367845 77683 0 3 0x10008a pause ksh 77683 417934 96949 0 3 0x92 select sshd 76283 100748 1 0 3 0x100083 ttyin getty 96949 194519 1 0 3 0x80 select sshd 67850 196761 21745 74 3 0x100092 bpf pflogd 21745 189679 1 0 3 0x80 netio pflogd 63224 231470 84318 73 3 0x100090 kqread syslogd 84318 489874 1 0 3 0x100082 netio syslogd 16315 217602 1 77 3 0x100090 poll dhclient *80077 126214 1 0 7 0 dhclient 78385 136972 0 0 2 0x14200 zerothread 3688 413699 0 0 3 0x14200 aiodoned aiodoned 3444 206214 0 0 3 0x14200 syncer update 54491 375793 0 0 3 0x14200 cleaner cleaner 91100 228567 0 0 3 0x14200 reaper reaper 4722 354140 0 0 3 0x14200 pgdaemon pagedaemon 29669 432127 0 0 3 0x14200 bored crynlk 47317 207746 0 0 3 0x14200 bored crypto 77190 166514 0 0 3 0x40014200 acpi0 acpi0 75866 301146 0 0 3 0x40014200 idle1 59976 346979 0 0 3 0x14200 bored softnet 56709 204459 0 0 3 0x14200 bored systqmp 70174 257385 0 0 3 0x14200 bored systq 1728 162225 0 0 3 0x40014200 bored softclock 95133 290646 0 0 3 0x40014200 idle0 53586 233093 0 0 3 0x14200 bored smr 1 192599 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 96929 (syz-executor.1) thread 0xffff800020ac0290 (25059) exclusive rrwlock inode r = 0 (0xfffffd806509f4e0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2974 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ace5918) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2959 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 Process 80077 (dhclient) thread 0xffff800020a6e008 (126214) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82614e30) #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 9551 7446K 7961K 78643K 12011 0 pcb 13 8K 8K 78643K 75 0 rtable 84 3K 4K 78643K 321 0 ifaddr 64 12K 15K 78643K 123 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1480 0 iov 0 0K 16K 78643K 219 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 1595 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 10 1K 1K 78643K 11 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 3 5K 25K 78643K 248 0 proc 62 63K 95K 78643K 472 0 subproc 16 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 34 0 in_multi 43 2K 2K 78643K 75 0 ether_multi 1 0K 0K 78643K 2 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 96 424K 424K 78643K 96 0 exec 0 0K 1K 78643K 227 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 107 13K 22K 78643K 1824 0 UVM aobj 14 2K 2K 78643K 14 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 43 0 NDP 12 0K 0K 78643K 27 0 temp 116 3034K 3664K 78643K 18932 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 44 0 42 1 0 1 1 0 8 0 rtentry 112 61 0 29 2 0 2 2 0 8 0 unpcb 120 140 0 130 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 1196 0 1196 1 1 0 1 0 8 0 tcpcb 544 104 0 100 1 0 1 1 0 8 0 inpcb 280 378 0 371 3 0 3 3 0 8 2 rttmr 72 2 0 2 2 1 1 1 0 8 1 nd6 48 7 0 6 1 0 1 1 0 8 0 ppxss 1128 8 0 8 1 0 1 1 0 8 1 pffrag 232 15 0 15 1 0 1 1 0 482 1 pffrnode 88 15 0 15 1 0 1 1 0 8 1 pffrent 40 464 0 464 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 30 0 3 1 0 1 1 0 8 0 pfstkey 112 30 0 3 1 0 1 1 0 8 0 pfstate 328 30 0 3 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 256 284 0 130 14 1 13 14 0 8 1 art_table 32 285 0 130 2 0 2 2 0 8 0 art_node 16 60 0 30 1 0 1 1 0 8 0 sysvmsgpl 40 43 0 19 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 9 0 1 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1799 0 391 46 0 46 46 0 8 0 ffsino 272 1799 0 391 95 0 95 95 0 8 0 nchpl 144 2459 0 838 61 0 61 61 0 8 0 uvmvnodes 72 2150 0 0 40 0 40 40 0 8 0 vnodes 208 2150 0 0 114 0 114 114 0 8 0 namei 1024 7156 0 7155 1 0 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 6772 0 6771 8 6 2 7 0 8 1 plimitpl 152 31 0 24 1 0 1 1 0 8 0 sigapl 432 447 0 434 3 1 2 3 0 8 0 futexpl 56 5788 0 5788 1 0 1 1 0 8 1 knotepl 112 95 0 78 1 0 1 1 0 8 0 kqueuepl 104 70 0 68 1 0 1 1 0 8 0 pipepl 160 288 0 273 2 0 2 2 0 8 1 fdescpl 488 448 0 434 3 0 3 3 0 8 0 filepl 152 3451 0 3368 7 0 7 7 0 8 3 lockfpl 104 73 0 72 1 0 1 1 0 8 0 lockfspl 48 26 0 25 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 26 0 16 1 0 1 1 0 8 0 ucredpl 96 357 0 348 1 0 1 1 0 8 0 zombiepl 144 434 0 434 1 0 1 1 0 8 1 processpl 904 465 0 434 4 0 4 4 0 8 0 procpl 632 1040 0 1000 5 0 5 5 0 8 1 sosppl 128 8 0 8 2 1 1 1 0 8 1 sockpl 384 580 0 561 5 0 5 5 0 8 3 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 185 0 0 23 0 23 23 0 8 0 mtagpl 80 18 0 0 1 0 1 1 0 8 0 mbufpl 256 447 0 0 27 0 27 27 0 8 0 bufpl 280 6875 0 1350 395 0 395 395 0 8 0 anonpl 16 57017 0 37210 82 1 81 81 0 125 0 amapchunkpl 152 2423 0 2273 8 1 7 8 0 158 0 amappl16 192 2146 0 1064 55 0 55 55 0 8 0 amappl15 184 58 0 54 1 0 1 1 0 8 0 amappl14 176 27 0 26 1 0 1 1 0 8 0 amappl13 168 107 0 106 1 0 1 1 0 8 0 amappl12 160 4 0 3 2 1 1 1 0 8 0 amappl11 152 168 0 152 1 0 1 1 0 8 0 amappl10 144 17 0 10 1 0 1 1 0 8 0 amappl9 136 609 0 606 1 0 1 1 0 8 0 amappl8 128 131 0 108 1 0 1 1 0 8 0 amappl7 120 107 0 92 1 0 1 1 0 8 0 amappl6 112 170 0 164 1 0 1 1 0 8 0 amappl5 104 133 0 119 1 0 1 1 0 8 0 amappl4 96 814 0 780 1 0 1 1 0 8 0 amappl3 88 120 0 112 1 0 1 1 0 8 0 amappl2 80 2646 0 2582 3 1 2 3 0 8 0 amappl1 72 19620 0 19198 26 16 10 21 0 8 0 amappl 80 1294 0 1252 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 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 448 0 434 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 448 0 434 1 0 1 1 0 8 0 vmmpekpl 168 7388 0 7357 2 0 2 2 0 8 0 vmmpepl 168 62687 0 60600 139 18 121 133 0 357 20 vmsppl 368 447 0 434 2 0 2 2 0 8 0 pdppl 4096 903 0 868 6 0 6 6 0 8 1 pvpl 32 188484 0 165632 191 0 191 191 0 265 3 pmappl 232 447 0 434 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 186 0 4 6 0 6 6 0 8 0