kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Wed May 6 03:33:26 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-1.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.48' (ECDSA) to the list of known hosts. 2020/05/06 03:35:34 parsed 1 programs 2020/05/06 03:35:40 executed programs: 0 login: panic: receive 1a: so 0xfffffd806f6de640, so_type 3, m 0xfffffd807f01e600, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *412219 58519 0 0 0 0K dhclient 35478 88461 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 panic(ffffffff821e832b) at panic+0x15c soreceive(fffffd806f6de640,0,ffff800020eadd38,0,0,ffff800020eadc44) at soreceive+0x174a soo_read(fffffd807c243260,ffff800020eadd38,0) at soo_read+0x53 dofilereadv(ffff800020e6c4e8,6,ffff800020eadd38,0,ffff800020eade20) at dofilereadv+0x1a1 sys_read(ffff800020e6c4e8,ffff800020eaddd0,ffff800020eade20) at sys_read+0x83 syscall(ffff800020eadea0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcafb0, 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 1a: so 0xfffffd806f6de640, so_type 3, m 0xfffffd807f01e600, m_type 0 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff821e832b) at panic+0x15c soreceive(fffffd806f6de640,0,ffff800020eadd38,0,0,ffff800020eadc44) at soreceive+0x174a soo_read(fffffd807c243260,ffff800020eadd38,0) at soo_read+0x53 dofilereadv(ffff800020e6c4e8,6,ffff800020eadd38,0,ffff800020eade20) at dofilereadv+0x1a1 sys_read(ffff800020e6c4e8,ffff800020eaddd0,ffff800020eade20) at sys_read+0x83 syscall(ffff800020eadea0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcafb0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020eada80 rbx 0xffff800020eadb30 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff821c8b5f kprintf+0x16f r9 0x1 r10 0xd2face7a4beecfcd r11 0x5a2b627f102fa55d r12 0x3000000008 r13 0xffff800020eada90 r14 0x100 r15 0x1 rip 0xffffffff81752b28 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020eada70 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhclient) pid=412219 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6d388,0xffff800020e6c9d8 process=0xffff800020e80f70 user=0xffff800020ea8000, vmspace=0xfffffd807efff5c0 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86388 389295 23285 0 3 0x82 thrsleep syz-execprog 86388 256694 23285 0 3 0x4000082 thrsleep syz-execprog 86388 306774 23285 0 3 0x4000082 thrsleep syz-execprog 86388 2861 23285 0 3 0x4000082 thrsleep syz-execprog 86388 293831 23285 0 3 0x4000082 thrsleep syz-execprog 86388 207906 23285 0 3 0x4000082 wait syz-execprog 86388 212172 23285 0 3 0x4000082 thrsleep syz-execprog 86388 122371 23285 0 3 0x4000082 thrsleep syz-execprog 86388 462896 23285 0 3 0x4000082 kqread syz-execprog 23285 444376 13474 0 3 0x10008a pause ksh 13474 71813 72365 0 3 0x92 select sshd 38198 199411 1 0 3 0x100083 ttyin getty 72365 307471 1 0 3 0x80 select sshd 2825 311576 48671 74 3 0x100092 bpf pflogd 48671 237115 1 0 3 0x80 netio pflogd 28823 331558 54104 73 3 0x100090 kqread syslogd 54104 464978 1 0 3 0x100082 netio syslogd 72313 415410 1 77 2 0x100010 dhclient *58519 412219 1 0 7 0 dhclient 38155 183098 0 0 3 0x14200 bored smr 75646 346337 0 0 3 0x14200 pgzero zerothread 93115 442089 0 0 3 0x14200 aiodoned aiodoned 81993 292011 0 0 3 0x14200 syncer update 58338 276106 0 0 3 0x14200 cleaner cleaner 88461 35478 0 0 7 0x14200 reaper 57051 87578 0 0 3 0x14200 pgdaemon pagedaemon 70279 64522 0 0 3 0x14200 bored crynlk 95133 493677 0 0 3 0x14200 bored crypto 82151 140742 0 0 3 0x40014200 acpi0 acpi0 67144 155508 0 0 3 0x40014200 idle1 45527 38815 0 0 3 0x14200 bored softnet 14633 234641 0 0 3 0x14200 bored systqmp 1240 122655 0 0 3 0x14200 bored systq 75187 227511 0 0 3 0x40014200 bored softclock 20426 192427 0 0 3 0x40014200 idle0 1 370199 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807effe3b0) #0 witness_lock+0x4c7 #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 58519 (dhclient) thread 0xffff800020e6c4e8 (412219) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8266bb40) #0 witness_lock+0x4c7 #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 15 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 78 12K 12K 78643K 950 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 1866 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 35 0 29 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 dino2pl 256 1424 0 22 88 0 88 88 0 8 0 ffsino 272 1424 0 22 94 0 94 94 0 8 0 nchpl 144 1640 0 38 60 0 60 60 0 8 0 uvmvnodes 72 1434 0 0 27 0 27 27 0 8 0 vnodes 208 1434 0 0 76 0 76 76 0 8 0 namei 1024 4205 0 4205 2 1 1 1 0 8 1 percpumem 16 31 0 1 1 0 1 1 0 8 0 scxspl 192 3989 0 3989 12 11 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 47 0 38 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipelkpl 48 77 0 71 2 1 1 1 0 8 0 pipepl 120 154 0 145 2 1 1 1 0 8 0 fdescpl 496 226 0 213 3 0 3 3 0 8 0 filepl 152 1111 0 1058 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 62 0 53 1 0 1 1 0 8 0 zombiepl 144 213 0 212 2 1 1 1 0 8 0 processpl 984 241 0 212 5 0 5 5 0 8 1 procpl 624 249 0 212 4 0 4 4 0 8 1 sockpl 400 81 0 63 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 56 0 0 7 0 7 7 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 141 0 0 7 0 7 7 0 8 0 bufpl 280 2982 0 133 204 0 204 204 0 8 0 anonpl 16 22323 0 20692 14 2 12 12 0 124 3 amapchunkpl 152 751 0 686 4 0 4 4 0 158 1 amappl16 192 153 0 120 2 0 2 2 0 8 0 amappl15 184 2 0 2 2 1 1 1 0 8 1 amappl14 176 34 0 27 1 0 1 1 0 8 0 amappl13 168 20 0 19 2 1 1 1 0 8 0 amappl12 160 11 0 9 2 1 1 1 0 8 0 amappl11 152 52 0 37 1 0 1 1 0 8 0 amappl10 144 20 0 16 1 0 1 1 0 8 0 amappl9 136 222 0 221 1 0 1 1 0 8 0 amappl8 128 275 0 266 1 0 1 1 0 8 0 amappl7 120 115 0 103 1 0 1 1 0 8 0 amappl6 112 25 0 23 2 1 1 1 0 8 0 amappl5 104 141 0 127 1 0 1 1 0 8 0 amappl4 96 498 0 471 1 0 1 1 0 8 0 amappl3 88 107 0 100 1 0 1 1 0 8 0 amappl2 80 879 0 818 3 1 2 2 0 8 0 amappl1 72 15430 0 15017 23 5 18 18 0 8 8 amappl 80 474 0 446 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 6369 0 6345 2 0 2 2 0 8 0 vmmpepl 168 32596 0 31690 84 12 72 72 0 357 30 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 113542 0 109632 110 6 104 104 0 265 70 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 112 231 0 4 7 0 7 7 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff821e832b) at panic+0x15c soreceive(fffffd806f6de640,0,ffff800020eadd38,0,0,ffff800020eadc44) at soreceive+0x174a soo_read(fffffd807c243260,ffff800020eadd38,0) at soo_read+0x53 dofilereadv(ffff800020e6c4e8,6,ffff800020eadd38,0,ffff800020eade20) at dofilereadv+0x1a1 sys_read(ffff800020e6c4e8,ffff800020eaddd0,ffff800020eade20) at sys_read+0x83 syscall(ffff800020eadea0) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcafb0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff8266b938) at __mp_lock+0x127 uvm_unmap_detach(ffff800020e5f4c0,1) at uvm_unmap_detach+0xe7 uvm_map_teardown(fffffd807efffcf0) at uvm_map_teardown+0x25c uvmspace_free(fffffd807efffcf0) at uvmspace_free+0x86 uvm_exit(ffff800020e807c0) at uvm_exit+0x29 reaper(ffff800020e19ad0) at reaper+0x189 end trace frame: 0x0, count: 6 ddb{1}> trace x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xc6 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff8266b938) at __mp_lock+0x127 uvm_unmap_detach(ffff800020e5f4c0,1) at uvm_unmap_detach+0xe7 uvm_map_teardown(fffffd807efffcf0) at uvm_map_teardown+0x25c uvmspace_free(fffffd807efffcf0) at uvmspace_free+0x86 uvm_exit(ffff800020e807c0) at uvm_exit+0x29 reaper(ffff800020e19ad0) at reaper+0x189 end trace frame: 0x0, count: -9