kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Tue Apr 14 09:02:22 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-9.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.59' (ECDSA) to the list of known hosts. 2020/04/14 09:02:35 parsed 1 programs 2020/04/14 09:02:41 executed programs: 0 login: panic: receive 3: so 0xfffffd806f6ea000, so_type 3, m 0xfffffd806d99e700, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *135756 99510 0 0 0 0K dhclient 384386 55103 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 panic(ffffffff821dc9b7) at panic+0x15c soreceive(fffffd806f6ea000,0,ffff800020ead618,0,0,ffff800020ead524) at soreceive+0x1727 soo_read(fffffd806fc8b2f8,ffff800020ead618,0) at soo_read+0x53 dofilereadv(ffff800020e6d118,6,ffff800020ead618,0,ffff800020ead700) at dofilereadv+0x1a1 sys_read(ffff800020e6d118,ffff800020ead6b0,ffff800020ead700) at sys_read+0x83 syscall(ffff800020ead780) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd1f40, 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 0xfffffd806f6ea000, so_type 3, m 0xfffffd806d99e700, m_type 0 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff821dc9b7) at panic+0x15c soreceive(fffffd806f6ea000,0,ffff800020ead618,0,0,ffff800020ead524) at soreceive+0x1727 soo_read(fffffd806fc8b2f8,ffff800020ead618,0) at soo_read+0x53 dofilereadv(ffff800020e6d118,6,ffff800020ead618,0,ffff800020ead700) at dofilereadv+0x1a1 sys_read(ffff800020e6d118,ffff800020ead6b0,ffff800020ead700) at sys_read+0x83 syscall(ffff800020ead780) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd1f40, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020ead360 rbx 0xffff800020ead410 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff811d81cf kprintf+0x16f r9 0x1 r10 0x385328528d97bec2 r11 0x7fc7a49840b2a825 r12 0x3000000008 r13 0xffff800020ead370 r14 0x100 r15 0x1 rip 0xffffffff81e682e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020ead350 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhclient) pid=135756 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6c4e8,0xffff800020e6d398 process=0xffff800020e807c0 user=0xffff800020ea8000, vmspace=0xfffffd807efff000 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 40184 486948 10581 0 3 0x82 thrsleep syz-execprog 40184 245037 10581 0 3 0x4000082 thrsleep syz-execprog 40184 342537 10581 0 3 0x4000082 thrsleep syz-execprog 40184 373174 10581 0 3 0x4000082 thrsleep syz-execprog 40184 226617 10581 0 3 0x4000082 thrsleep syz-execprog 40184 472874 10581 0 2 0x4000082 syz-execprog 40184 56526 10581 0 3 0x4000082 thrsleep syz-execprog 40184 458273 10581 0 3 0x4000082 wait syz-execprog 40184 149090 10581 0 3 0x4000082 thrsleep syz-execprog 10581 60957 30635 0 3 0x10008a pause ksh 30635 327927 4418 0 3 0x92 select sshd 5888 60216 1 0 3 0x100083 ttyin getty 4418 515761 1 0 3 0x80 select sshd 68486 206317 46768 74 3 0x100092 bpf pflogd 46768 478637 1 0 3 0x80 netio pflogd 58283 228764 8169 73 3 0x100090 kqread syslogd 8169 364717 1 0 3 0x100082 netio syslogd 92390 196440 1 77 2 0x100010 dhclient *99510 135756 1 0 7 0 dhclient 11537 333556 0 0 3 0x14200 bored smr 36827 427443 0 0 3 0x14200 pgzero zerothread 14506 147123 0 0 3 0x14200 aiodoned aiodoned 58682 210315 0 0 3 0x14200 syncer update 75318 226820 0 0 3 0x14200 cleaner cleaner 55103 384386 0 0 7 0x14200 reaper 95564 475740 0 0 3 0x14200 pgdaemon pagedaemon 41156 121752 0 0 3 0x14200 bored crynlk 42733 121571 0 0 3 0x14200 bored crypto 42270 194334 0 0 3 0x40014200 acpi0 acpi0 64567 508939 0 0 3 0x40014200 idle1 11874 384086 0 0 3 0x14200 bored softnet 75637 285567 0 0 3 0x14200 bored systqmp 99230 276557 0 0 3 0x14200 bored systq 77831 233108 0 0 3 0x40014200 bored softclock 75040 367944 0 0 3 0x40014200 idle0 1 413878 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8006fe4c98) #0 witness_lock+0x4c5 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b #3 pmap_remove_ptes+0x233 #4 pmap_do_remove+0x401 #5 uvm_map_teardown+0x195 #6 uvmspace_free+0x86 #7 uvm_exit+0x29 #8 reaper+0x189 #9 proc_trampoline+0x1c exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807effecc0) #0 witness_lock+0x4c5 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b #3 pmap_do_remove+0x88 #4 uvm_map_teardown+0x195 #5 uvmspace_free+0x86 #6 uvm_exit+0x29 #7 reaper+0x189 #8 proc_trampoline+0x1c Process 99510 (dhclient) thread 0xffff800020e6d118 (135756) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82688e70) #0 witness_lock+0x4c5 #1 solock+0x66 #2 soreceive+0x114 #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 74 12K 12K 78643K 951 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 3033K 3097K 78643K 1912 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 1 0 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 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 256 144 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 1 0 1 1 0 8 1 percpumem 16 31 0 1 1 0 1 1 0 8 0 scxspl 192 4474 0 4474 2 1 1 2 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 1 0 1 1 0 8 0 pipepl 120 148 0 139 1 0 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 1 0 1 1 0 8 0 processpl 984 241 0 212 5 0 5 5 0 8 1 procpl 624 249 0 212 3 0 3 3 0 8 0 sockpl 400 80 0 62 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 77 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 130 0 0 8 0 8 8 0 8 0 bufpl 280 3744 0 174 255 0 255 255 0 8 0 anonpl 16 22412 0 20817 14 1 13 13 0 124 6 amapchunkpl 152 726 0 659 5 0 5 5 0 158 2 amappl16 192 145 0 113 3 0 3 3 0 8 0 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 3 0 1 2 1 1 1 0 8 0 amappl13 168 20 0 19 1 0 1 1 0 8 0 amappl12 160 14 0 13 2 1 1 1 0 8 0 amappl11 152 71 0 53 1 0 1 1 0 8 0 amappl10 144 14 0 12 1 0 1 1 0 8 0 amappl9 136 230 0 228 1 0 1 1 0 8 0 amappl8 128 269 0 261 1 0 1 1 0 8 0 amappl7 120 116 0 105 1 0 1 1 0 8 0 amappl6 112 20 0 19 2 1 1 1 0 8 0 amappl5 104 131 0 117 1 0 1 1 0 8 0 amappl4 96 515 0 484 2 0 2 2 0 8 1 amappl3 88 110 0 105 1 0 1 1 0 8 0 amappl2 80 938 0 877 3 0 3 3 0 8 1 amappl1 72 15137 0 14720 25 7 18 20 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 6257 0 6232 2 0 2 2 0 8 0 vmmpepl 168 32600 0 31691 87 7 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 112122 0 108245 115 0 115 115 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 112 145 0 3 5 0 5 5 0 8 0 ddb{0}>