login: panic: sbdrop Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240a436) at panic+0x15c sys/kern/subr_prf.c:207 sbdrop(ffff80001d79cd28,ffff80001d79cdb0,25f) at sbdrop+0x3a6 sys/kern/uipc_socket2.c:953 sbflush(ffff80001d79cd28,ffff80001d79cdb0) at sbflush+0x93 sys/kern/uipc_socket2.c:934 sbrelease(ffff80001d79cd28,ffff80001d79cdb0) at sbrelease+0x2e sys/kern/uipc_socket2.c:525 sorflush(fffffd806b05e320) at sorflush+0x14b sys/kern/uipc_socket.c:1137 sofree(fffffd806b05e320,42) at sofree+0x147 sys/kern/uipc_socket.c:263 soclose(fffffd806b05e320,80) at soclose+0x268 sys/kern/uipc_socket.c:344 soo_close(fffffd80573eff10,ffff80001d71d120) at soo_close+0x40 fdrop(fffffd80573eff10,ffff80001d71d120) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80573eff10,ffff80001d71d120) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d71d120) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d71d120,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d71d120,ffff80001d79d180,ffff80001d79d1d0) at sys_exit+0x16 sys/kern/kern_exit.c:95 end trace frame: 0xffff80001d79d240, count: 0 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic sbdrop ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240a436) at panic+0x15c sys/kern/subr_prf.c:207 sbdrop(ffff80001d79cd28,ffff80001d79cdb0,25f) at sbdrop+0x3a6 sys/kern/uipc_socket2.c:953 sbflush(ffff80001d79cd28,ffff80001d79cdb0) at sbflush+0x93 sys/kern/uipc_socket2.c:934 sbrelease(ffff80001d79cd28,ffff80001d79cdb0) at sbrelease+0x2e sys/kern/uipc_socket2.c:525 sorflush(fffffd806b05e320) at sorflush+0x14b sys/kern/uipc_socket.c:1137 sofree(fffffd806b05e320,42) at sofree+0x147 sys/kern/uipc_socket.c:263 soclose(fffffd806b05e320,80) at soclose+0x268 sys/kern/uipc_socket.c:344 soo_close(fffffd80573eff10,ffff80001d71d120) at soo_close+0x40 fdrop(fffffd80573eff10,ffff80001d71d120) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80573eff10,ffff80001d71d120) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d71d120) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d71d120,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d71d120,ffff80001d79d180,ffff80001d79d1d0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001d79d250) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8ee0, count: -16 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d79cb70 rbx 0xffff80001d79cc20 rdx 0x2 rcx 0 rax 0x1 r8 0xffffffff810c775f kprintf+0x15f r9 0x1 r10 0x2 r11 0xf0f5a2502d90b12 r12 0x3000000008 r13 0xffff80001d79cb80 r14 0x100 r15 0x1 rip 0xffffffff8211f228 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d79cb60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=512320 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6a9278,0xffffffff827e55d8 process=0xffff80001d6c55d0 user=0xffff80001d798000, vmspace=0xfffffd806bc09330 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 94489 339512 59201 0 3 0x82 nanosleep syz-executor.1 6110 516862 59201 0 3 0x82 nanosleep syz-executor.0 59201 451798 96185 0 3 0x82 thrsleep syz-fuzzer 59201 439011 96185 0 3 0x4000082 nanosleep syz-fuzzer 59201 443053 96185 0 3 0x4000082 thrsleep syz-fuzzer 59201 273961 96185 0 3 0x4000082 thrsleep syz-fuzzer 59201 426505 96185 0 3 0x4000082 thrsleep syz-fuzzer 59201 157876 96185 0 3 0x4000082 thrsleep syz-fuzzer 59201 340313 96185 0 3 0x4000082 thrsleep syz-fuzzer 59201 291228 96185 0 3 0x4000082 kqread syz-fuzzer 96185 402535 93467 0 3 0x10008a pause ksh 93467 477297 25790 0 3 0x92 select sshd 91596 359621 1 0 3 0x100083 ttyin getty 25790 498569 1 0 3 0x80 select sshd 81315 371862 90960 73 3 0x100090 kqread syslogd 90960 443489 1 0 3 0x100082 netio syslogd 83580 458394 1 77 3 0x100090 poll dhclient 97506 382456 1 0 3 0x80 poll dhclient 83253 58696 0 0 3 0x14200 bored smr 46222 15433 0 0 2 0x14200 zerothread 95601 160247 0 0 3 0x14200 aiodoned aiodoned 88725 62635 0 0 3 0x14200 syncer update 41266 381141 0 0 3 0x14200 cleaner cleaner 4656 99764 0 0 3 0x14200 reaper reaper 90547 88780 0 0 3 0x14200 pgdaemon pagedaemon 15660 391920 0 0 3 0x14200 bored crynlk 52133 240817 0 0 3 0x14200 bored crypto 32785 203478 0 0 3 0x40014200 acpi0 acpi0 48823 396853 0 0 3 0x14200 bored softnet 84300 256798 0 0 3 0x14200 bored systqmp 43042 490671 0 0 3 0x14200 bored systq 76596 259386 0 0 3 0x40014200 bored softclock 9211 355715 0 0 3 0x40014200 idle0 1 340963 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9458 6453K 6648K 78643K 10591 0 pcb 13 8K 8K 78643K 23 0 rtable 105 3K 3K 78643K 199 0 ifaddr 39 10K 10K 78643K 41 0 counters 21 16K 16K 78643K 21 0 ioctlops 0 0K 4K 78643K 27 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1231 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 0K 0K 78643K 2 0 sem 4 0K 0K 78643K 4 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 46 0 proc 47 38K 54K 78643K 358 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 2 0 in_multi 33 2K 2K 78643K 36 0 ether_multi 1 0K 0K 78643K 2 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 181 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 22K 23K 78643K 937 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 4 0 NDP 9 0K 0K 78643K 9 0 temp 60 3847K 3911K 78643K 1796 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb> 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 rtpcb 80 23 0 21 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 27 0 19 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 61 0 61 1 0 1 1 0 8 1 tcpcb 544 14 0 10 1 0 1 1 0 8 0 inpcb 296 48 0 41 1 0 1 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 189 0 0 12 0 12 12 0 8 0 art_table 32 190 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 semapl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1430 0 31 88 0 88 88 0 8 0 ffsino 240 1430 0 31 83 0 83 83 0 8 0 nchpl 144 1670 0 63 60 0 60 60 0 8 0 uvmvnodes 72 1483 0 0 27 0 27 27 0 8 0 vnodes 208 1483 0 0 79 0 79 79 0 8 0 namei 1024 4144 0 4144 1 0 1 1 0 8 1 scxspl 192 4618 0 4618 1 0 1 1 0 8 1 plimitpl 152 14 0 7 1 0 1 1 0 8 0 sigapl 424 232 0 204 4 0 4 4 0 8 0 futexpl 56 356 0 356 1 0 1 1 0 8 1 knotepl 112 61 0 42 1 0 1 1 0 8 0 kqueuepl 144 4 0 1 1 0 1 1 0 8 0 pipepl 272 74 0 64 1 0 1 1 0 8 0 fdescpl 432 218 0 204 2 0 2 2 0 8 0 filepl 120 1111 0 1014 4 0 4 4 0 8 0 lockfpl 104 9 0 8 1 0 1 1 0 8 0 lockfspl 48 4 0 3 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 48 0 41 1 0 1 1 0 8 0 zombiepl 144 205 0 203 1 0 1 1 0 8 0 processpl 928 232 0 203 4 0 4 4 0 8 0 procpl 624 253 0 217 3 0 3 3 0 8 0 sockpl 400 98 0 80 3 0 3 3 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl4k 4096 11 0 11 2 1 1 1 0 8 1 mcl2k 2048 71115 0 71069 16 3 13 13 0 8 4 mtagpl 96 2 0 2 1 1 0 1 0 8 0 mbufpl 256 113079 0 113008 11 2 9 9 0 8 1 bufpl 280 3286 0 124 226 0 226 226 0 8 0 anonpl 16 36895 0 21232 66 2 64 64 0 107 1 amapchunkpl 152 1040 0 907 7 0 7 7 0 158 1 amappl16 192 1016 0 156 44 0 44 44 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 30 0 25 1 0 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 6 0 4 1 0 1 1 0 8 0 amappl11 152 49 0 38 1 0 1 1 0 8 0 amappl10 144 11 0 7 1 0 1 1 0 8 0 amappl9 136 372 0 371 1 0 1 1 0 8 0 amappl8 128 309 0 275 2 0 2 2 0 8 0 amappl7 120 115 0 101 1 0 1 1 0 8 0 amappl6 112 32 0 25 1 0 1 1 0 8 0 amappl5 104 150 0 140 1 0 1 1 0 8 0 amappl4 96 421 0 395 1 0 1 1 0 8 0 amappl3 88 102 0 95 1 0 1 1 0 8 0 amappl2 80 913 0 850 2 0 2 2 0 8 0 amappl1 72 13460 0 13036 22 5 17 17 0 8 8 amappl 80 474 0 433 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 218 0 204 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 218 0 204 1 0 1 1 0 8 0 vmmpekpl 168 5664 0 5638 2 0 2 2 0 8 0 vmmpepl 168 34204 0 32253 117 5 112 112 0 357 27 vmsppl 272 217 0 204 2 0 2 2 0 8 1 pdppl 4096 442 0 408 6 0 6 6 0 8 1 pvpl 32 125220 0 106612 152 0 152 152 0 265 1 pmappl 200 217 0 204 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 235 0 8 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240a436) at panic+0x15c sys/kern/subr_prf.c:207 sbdrop(ffff80001d79cd28,ffff80001d79cdb0,25f) at sbdrop+0x3a6 sys/kern/uipc_socket2.c:953 sbflush(ffff80001d79cd28,ffff80001d79cdb0) at sbflush+0x93 sys/kern/uipc_socket2.c:934 sbrelease(ffff80001d79cd28,ffff80001d79cdb0) at sbrelease+0x2e sys/kern/uipc_socket2.c:525 sorflush(fffffd806b05e320) at sorflush+0x14b sys/kern/uipc_socket.c:1137 sofree(fffffd806b05e320,42) at sofree+0x147 sys/kern/uipc_socket.c:263 soclose(fffffd806b05e320,80) at soclose+0x268 sys/kern/uipc_socket.c:344 soo_close(fffffd80573eff10,ffff80001d71d120) at soo_close+0x40 fdrop(fffffd80573eff10,ffff80001d71d120) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80573eff10,ffff80001d71d120) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d71d120) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d71d120,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d71d120,ffff80001d79d180,ffff80001d79d1d0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001d79d250) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8ee0, count: -16 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240a436) at panic+0x15c sys/kern/subr_prf.c:207 sbdrop(ffff80001d79cd28,ffff80001d79cdb0,25f) at sbdrop+0x3a6 sys/kern/uipc_socket2.c:953 sbflush(ffff80001d79cd28,ffff80001d79cdb0) at sbflush+0x93 sys/kern/uipc_socket2.c:934 sbrelease(ffff80001d79cd28,ffff80001d79cdb0) at sbrelease+0x2e sys/kern/uipc_socket2.c:525 sorflush(fffffd806b05e320) at sorflush+0x14b sys/kern/uipc_socket.c:1137 sofree(fffffd806b05e320,42) at sofree+0x147 sys/kern/uipc_socket.c:263 soclose(fffffd806b05e320,80) at soclose+0x268 sys/kern/uipc_socket.c:344 soo_close(fffffd80573eff10,ffff80001d71d120) at soo_close+0x40 fdrop(fffffd80573eff10,ffff80001d71d120) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80573eff10,ffff80001d71d120) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d71d120) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d71d120,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d71d120,ffff80001d79d180,ffff80001d79d1d0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001d79d250) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8ee0, count: -16