panic: sbdrop Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 32567 25525 0 0x14000 0x200 0 softnet db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8220e8ba) at panic+0x15c sys/kern/subr_prf.c:207 sbdrop(fffffd806eb7b968,fffffd806eb7ba60,54) at sbdrop+0x3c6 sys/kern/uipc_socket2.c:950 tcp_input(ffff800020a49ca8,ffff800020a49cb4,6,2) at tcp_input+0x3d73 sys/netinet/tcp_input.c:1725 ip_deliver(ffff800020a49ca8,ffff800020a49cb4,6,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668 ip_ours(ffff800020a49ca8,ffff800020a49cb4,8b,0) at ip_ours+0x412 ip_input_if(ffff800020a49ca8,ffff800020a49cb4,4,0,ffff80000017b2a8) at ip_input_if+0x6ce ipv4_input(ffff80000017b2a8,fffffd806f2f1c00) at ipv4_input+0x48 sys/netinet/ip_input.c:215 ether_input(ffff80000017b2a8,fffffd806f2f1c00,0) at ether_input+0x345 sys/net/if_ethersubr.c:461 if_input_process(ffff80000017b2a8,ffff800020a49dd8) at if_input_process+0xfb if_ih_input sys/net/if.c:909 [inline] if_input_process(ffff80000017b2a8,ffff800020a49dd8) at if_input_process+0xfb sys/net/if.c:943 ifiq_process(ffff80000017b6a0) at ifiq_process+0x80 sys/net/ifq.c:646 taskq_thread(ffff80000002b080) at taskq_thread+0x9c sys/kern/kern_task.c:369 end trace frame: 0x0, count: 3 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 sbdrop ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8220e8ba) at panic+0x15c sys/kern/subr_prf.c:207 sbdrop(fffffd806eb7b968,fffffd806eb7ba60,54) at sbdrop+0x3c6 sys/kern/uipc_socket2.c:950 tcp_input(ffff800020a49ca8,ffff800020a49cb4,6,2) at tcp_input+0x3d73 sys/netinet/tcp_input.c:1725 ip_deliver(ffff800020a49ca8,ffff800020a49cb4,6,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668 ip_ours(ffff800020a49ca8,ffff800020a49cb4,8b,0) at ip_ours+0x412 ip_input_if(ffff800020a49ca8,ffff800020a49cb4,4,0,ffff80000017b2a8) at ip_input_if+0x6ce ipv4_input(ffff80000017b2a8,fffffd806f2f1c00) at ipv4_input+0x48 sys/netinet/ip_input.c:215 ether_input(ffff80000017b2a8,fffffd806f2f1c00,0) at ether_input+0x345 sys/net/if_ethersubr.c:461 if_input_process(ffff80000017b2a8,ffff800020a49dd8) at if_input_process+0xfb if_ih_input sys/net/if.c:909 [inline] if_input_process(ffff80000017b2a8,ffff800020a49dd8) at if_input_process+0xfb sys/net/if.c:943 ifiq_process(ffff80000017b6a0) at ifiq_process+0x80 sys/net/ifq.c:646 taskq_thread(ffff80000002b080) at taskq_thread+0x9c sys/kern/kern_task.c:369 end trace frame: 0x0, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a49830 rbx 0xffff800020a498e0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8164a22f kprintf+0x16f r9 0x1 r10 0x675e029446f9bb88 r11 0x33ad3585d97afecd r12 0x3000000008 r13 0xffff800020a49840 r14 0x100 r15 0x1 rip 0xffffffff81030db8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a49820 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (softnet) pid=32567 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a284e0,0xffff800020a28280 process=0xffff800020a2a000 user=0xffff800020a44000, vmspace=0xffffffff82639c28 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 41559 182627 19087 0 3 0x82 nanosleep syz-executor.0 19087 7529 71358 0 3 0x82 thrsleep syz-execprog 19087 503350 71358 0 3 0x4000082 nanosleep syz-execprog 19087 191251 71358 0 3 0x4000082 thrsleep syz-execprog 19087 19845 71358 0 3 0x4000082 thrsleep syz-execprog 19087 268681 71358 0 3 0x4000082 kqread syz-execprog 19087 156361 71358 0 3 0x4000082 thrsleep syz-execprog 19087 237300 71358 0 3 0x4000082 thrsleep syz-execprog 19087 327756 71358 0 3 0x4000082 nanosleep syz-execprog 19087 292175 71358 0 3 0x4000082 thrsleep syz-execprog 71358 513810 83847 0 3 0x10008a pause ksh 83847 341905 4590 0 3 0x92 select sshd 30733 342262 1 0 3 0x100083 ttyin getty 4590 54783 1 0 3 0x80 select sshd 35653 312849 53160 74 3 0x100092 bpf pflogd 53160 43569 1 0 3 0x80 netio pflogd 126 210653 67115 73 3 0x100090 kqread syslogd 67115 228114 1 0 3 0x100082 netio syslogd 33804 9144 1 77 3 0x100090 poll dhclient 98840 17027 1 0 3 0x80 poll dhclient 70765 412286 0 0 3 0x14200 bored smr 50082 461378 0 0 3 0x14200 pgzero zerothread 16814 420407 0 0 3 0x14200 aiodoned aiodoned 30627 433218 0 0 3 0x14200 syncer update 89464 37713 0 0 3 0x14200 cleaner cleaner 77005 90243 0 0 3 0x14200 reaper reaper 17783 364880 0 0 3 0x14200 pgdaemon pagedaemon 29773 523456 0 0 3 0x14200 bored crynlk 3410 115791 0 0 3 0x14200 bored crypto 77645 199860 0 0 3 0x40014200 acpi0 acpi0 74547 23530 0 0 7 0x40014200 idle1 *25525 32567 0 0 7 0x14200 softnet 29925 68248 0 0 3 0x14200 bored systqmp 26449 234261 0 0 3 0x14200 bored systq 2540 458798 0 0 3 0x40014200 bored softclock 74522 130537 0 0 3 0x40014200 idle0 1 450701 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 25525 (softnet) thread 0xffff800020a28000 (32567) shared rwlock netlock r = 0 (0xffffffff8249c838) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 if_input_process+0x84 sys/net/if.c:941 #2 ifiq_process+0x80 sys/net/ifq.c:646 #3 taskq_thread+0x9c sys/kern/kern_task.c:369 #4 proc_trampoline+0x1c shared rwlock softnet r = 0 (0xffff80000002b0e0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 taskq_thread+0x8f sys/kern/kern_task.c:368 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9466 6395K 6395K 78643K 10557 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 163 0 ifaddr 37 9K 9K 78643K 284 0 counters 41 33K 33K 78643K 41 0 ioctlops 0 0K 4K 78643K 1468 0 mount 1 1K 1K 78643K 1 0 vnodes 1183 74K 75K 78643K 1188 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 2 4K 12K 78643K 263 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 22 1K 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 19 95K 95K 78643K 19 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 78 12K 12K 78643K 1202 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 5 0K 0K 78643K 7 0 temp 29 3009K 3073K 78643K 2401 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 4 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 1 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 2 2 0 1 0 8 0 tcpqe 32 10 0 10 1 1 0 1 0 8 0 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 279 0 273 1 0 1 1 0 8 0 nd6 48 3 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 10 0 0 1 0 1 1 0 8 0 pfstkey 112 10 0 0 1 0 1 1 0 8 0 pfstate 328 10 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 256 145 0 0 10 0 10 10 0 8 0 art_table 32 146 0 0 2 0 2 2 0 8 0 art_node 16 33 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1668 0 265 46 0 46 46 0 8 0 ffsino 272 1668 0 265 94 0 94 94 0 8 0 nchpl 144 2139 0 529 60 0 60 60 0 8 0 uvmvnodes 72 1678 0 0 31 0 31 31 0 8 0 vnodes 208 1678 0 0 89 0 89 89 0 8 0 namei 1024 5105 0 5105 1 0 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 6141 0 6141 8 1 7 7 0 8 7 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 486 0 457 4 0 4 4 0 8 0 knotepl 112 39 0 28 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipelkpl 48 74 0 67 2 1 1 1 0 8 0 pipepl 120 148 0 135 2 1 1 1 0 8