kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Tue Mar 3 04:22:11 PST 2020 OpenBSD/amd64 (ci-openbsd-multicore-8.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.64' (ECDSA) to the list of known hosts. 2020/03/03 04:24:40 parsed 1 programs 2020/03/03 04:24:47 executed programs: 0 login: panic: receive 3: so 0xfffffd806f6ed7d0, so_type 3, m 0xfffffd806d775900, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 29584 34447 0 0 0 0K dhclient 218274 90194 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 panic(ffffffff821d05e5) at panic+0x15c soreceive(fffffd806f6ed7d0,0,ffff800020aadae8,0,0,ffff800020aad9f4) at soreceive+0x1727 soo_read(fffffd806fff1720,ffff800020aadae8,0) at soo_read+0x53 dofilereadv(ffff800020a6c4e8,6,ffff800020aadae8,0,ffff800020aadbd0) at dofilereadv+0x1a1 sys_read(ffff800020a6c4e8,ffff800020aadb80,ffff800020aadbd0) at sys_read+0x83 syscall(ffff800020aadc50) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffebaf0, 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 3: so 0xfffffd806f6ed7d0, so_type 3, m 0xfffffd806d775900, m_type 0 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff821d05e5) at panic+0x15c soreceive(fffffd806f6ed7d0,0,ffff800020aadae8,0,0,ffff800020aad9f4) at soreceive+0x1727 soo_read(fffffd806fff1720,ffff800020aadae8,0) at soo_read+0x53 dofilereadv(ffff800020a6c4e8,6,ffff800020aadae8,0,ffff800020aadbd0) at dofilereadv+0x1a1 sys_read(ffff800020a6c4e8,ffff800020aadb80,ffff800020aadbd0) at sys_read+0x83 syscall(ffff800020aadc50) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffebaf0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020aad830 rbx 0xffff800020aad8e0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff820becdf kprintf+0x16f r9 0x1 r10 0x1e83058710f6c9ec r11 0x53ba271b26bad980 r12 0x3000000008 r13 0xffff800020aad840 r14 0x100 r15 0x1 rip 0xffffffff81722db8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020aad820 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhclient) pid=29584 stat=onproc flags process=0 proc=0 pri=24, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a6cea8,0xffff800020a6cc48 process=0xffff800020a80790 user=0xffff800020aa8000, 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 21162 325179 54067 0 3 0x82 thrsleep syz-execprog 21162 516328 54067 0 3 0x4000082 thrsleep syz-execprog 21162 153940 54067 0 3 0x4000082 thrsleep syz-execprog 21162 29241 54067 0 3 0x4000082 thrsleep syz-execprog 21162 366301 54067 0 3 0x4000082 thrsleep syz-execprog 21162 143661 54067 0 3 0x4000082 thrsleep syz-execprog 21162 386449 54067 0 3 0x4000082 thrsleep syz-execprog 21162 344435 54067 0 3 0x4000082 kqread syz-execprog 21162 491098 54067 0 3 0x4000082 wait syz-execprog 54067 177400 47753 0 3 0x10008a pause ksh 47753 122891 64594 0 3 0x92 select sshd 75806 250377 1 0 3 0x100083 ttyin getty 64594 518759 1 0 3 0x80 select sshd 27557 76382 53969 74 3 0x100092 bpf pflogd 53969 459284 1 0 3 0x80 netio pflogd 99499 423770 64464 73 3 0x100090 kqread syslogd 64464 479256 1 0 3 0x100082 netio syslogd 27068 162944 1 77 2 0x100010 dhclient *34447 29584 1 0 7 0 dhclient 6163 73255 0 0 3 0x14200 bored smr 4113 327695 0 0 3 0x14200 pgzero zerothread 96064 438677 0 0 3 0x14200 aiodoned aiodoned 98697 162009 0 0 3 0x14200 syncer update 42696 39314 0 0 3 0x14200 cleaner cleaner 90194 218274 0 0 7 0x14200 reaper 61672 38854 0 0 3 0x14200 pgdaemon pagedaemon 9741 196384 0 0 3 0x14200 bored crynlk 71243 341639 0 0 3 0x14200 bored crypto 52161 31908 0 0 3 0x40014200 acpi0 acpi0 75994 203738 0 0 3 0x40014200 idle1 78148 345429 0 0 3 0x14200 bored softnet 99752 130856 0 0 3 0x14200 bored systqmp 95707 341691 0 0 3 0x14200 bored systq 1440 3056 0 0 3 0x40014200 bored softclock 73404 246842 0 0 3 0x40014200 idle0 1 217274 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 34447 (dhclient) thread 0xffff800020a6c4e8 (29584) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82662ab0) #0 witness_lock+0x52e #1 solock+0x66 #2 soreceive+0xb3a #3 soo_read+0x53 #4 dofilereadv+0x1a1 #5 sys_read+0x83 #6 syscall+0x4a4 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9462 6393K 6395K 78643K 10557 0 pcb 13 8K 8K 78643K 13 0 rtable 61 2K 2K 78643K 165 0 ifaddr 29 8K 9K 78643K 39 0 counters 39 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 1 0K 12K 78643K 18 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 11 0K 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 76 12K 12K 78643K 957 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 4 0K 0K 78643K 7 0 temp 24 3013K 3077K 78643K 1910 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 2 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 12 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 1 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 34 0 28 1 0 1 1 0 8 0 nd6 48 3 0 3 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 11 0 7 2 1 1 1 0 8 0 pfstkey 112 11 0 7 2 1 1 1 0 8 0 pfstate 328 11 0 7 2 1 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 256 144 0 48 9 0 9 9 0 8 3 art_table 32 145 0 48 2 0 2 2 0 8 1 art_node 16 33 0 13 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1423 0 20 46 0 46 46 0 8 0 ffsino 272 1423 0 20 94 0 94 94 0 8 0 nchpl 144 1649 0 38 60 0 60 60 0 8 0 uvmvnodes 72 1433 0 0 27 0 27 27 0 8 0 vnodes 208 1433 0 0 76 0 76 76 0 8 0 namei 1024 4126 0 4126 2 1 1 1 0 8 1 percpumem 16 31 0 1 1 0 1 1 0 8 0 scxspl 192 4658 0 4658 13 12 1 7 0 8 1 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 241 0 213 4 0 4 4 0 8 0 knotepl 112 39 0 30 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipelkpl 48 74 0 68 2 1 1 1 0 8 0 pipepl 120 148 0 139 2 1 1 1 0 8 0 fdescpl 496 226 0 213 3 0 3 3 0 8 0 filepl 152 1103 0 1050 3 0 3 3 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 213 0 212 2 1 1 1 0 8 0 processpl 960 241 0 212 5 0 5 5 0 8 1 procpl 624 249 0 212 4 0 4 4 0 8 1 sockpl 400 80 0 62 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 81 0 0 11 0 11 11 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 163 0 0 8 0 8 8 0 8 0 bufpl 280 3741 0 172 255 0 255 255 0 8 0 anonpl 16 22310 0 20722 15 2 13 13 0 124 5 amapchunkpl 152 804 0 737 5 0 5 5 0 158 1 amappl16 192 142 0 113 2 0 2 2 0 8 0 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 2 0 1 2 1 1 1 0 8 0 amappl13 168 20 0 19 2 1 1 1 0 8 0 amappl12 160 16 0 14 2 1 1 1 0 8 0 amappl11 152 72 0 54 1 0 1 1 0 8 0 amappl10 144 17 0 12 1 0 1 1 0 8 0 amappl9 136 233 0 229 1 0 1 1 0 8 0 amappl8 128 270 0 262 1 0 1 1 0 8 0 amappl7 120 117 0 105 1 0 1 1 0 8 0 amappl6 112 21 0 19 1 0 1 1 0 8 0 amappl5 104 131 0 117 1 0 1 1 0 8 0 amappl4 96 514 0 484 1 0 1 1 0 8 0 amappl3 88 111 0 106 1 0 1 1 0 8 0 amappl2 80 935 0 877 4 1 3 3 0 8 1 amappl1 72 15247 0 14828 26 8 18 21 0 8 8 amappl 80 478 0 450 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 226 0 213 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 226 0 213 1 0 1 1 0 8 0 vmmpekpl 168 6235 0 6209 2 0 2 2 0 8 0 vmmpepl 168 32678 0 31769 91 11 80 80 0 357 39 vmsppl 368 225 0 212 2 0 2 2 0 8 0 pdppl 4096 460 0 424 6 0 6 6 0 8 0 pvpl 32 112331 0 108452 121 6 115 115 0 265 81 pmappl 232 225 0 212 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 148 0 4 5 0 5 5 0 8 0