kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Tue May 19 23:23:26 PDT 2020 OpenBSD/amd64 (ci-openbsd-multicore-9.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.237' (ECDSA) to the list of known hosts. 2020/05/19 23:23:37 parsed 1 programs 2020/05/19 23:23:41 executed programs: 0 login: panic: receive 3: so 0xfffffd806f6e1190, so_type 3, m 0xfffffd806f172a00, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *473231 91441 0 0 0 0K dhclient 253062 57174 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 panic(ffffffff821dd823) at panic+0x15c soreceive(fffffd806f6e1190,0,ffff800020ead808,0,0,ffff800020ead714) at soreceive+0x1727 soo_read(fffffd807a5f2428,ffff800020ead808,0) at soo_read+0x53 dofilereadv(ffff800020e6c4e8,6,ffff800020ead808,0,ffff800020ead8f0) at dofilereadv+0x1a1 sys_read(ffff800020e6c4e8,ffff800020ead8a0,ffff800020ead8f0) at sys_read+0x83 syscall(ffff800020ead970) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe1b40, 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 0xfffffd806f6e1190, so_type 3, m 0xfffffd806f172a00, m_type 0 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff821dd823) at panic+0x15c soreceive(fffffd806f6e1190,0,ffff800020ead808,0,0,ffff800020ead714) at soreceive+0x1727 soo_read(fffffd807a5f2428,ffff800020ead808,0) at soo_read+0x53 dofilereadv(ffff800020e6c4e8,6,ffff800020ead808,0,ffff800020ead8f0) at dofilereadv+0x1a1 sys_read(ffff800020e6c4e8,ffff800020ead8a0,ffff800020ead8f0) at sys_read+0x83 syscall(ffff800020ead970) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe1b40, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020ead550 rbx 0xffff800020ead600 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81b9429f kprintf+0x16f r9 0x1 r10 0x2 r11 0x3e8f7928bb104cd6 r12 0x3000000008 r13 0xffff800020ead560 r14 0x100 r15 0x1 rip 0xffffffff815ea598 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020ead540 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhclient) pid=473231 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6cea8,0xffff800020e6cc48 process=0xffff800020e803e8 user=0xffff800020ea8000, vmspace=0xfffffd807efff450 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26833 239461 83159 0 3 0x82 thrsleep syz-execprog 26833 392948 83159 0 3 0x4000082 thrsleep syz-execprog 26833 47003 83159 0 3 0x4000082 thrsleep syz-execprog 26833 132785 83159 0 3 0x4000082 thrsleep syz-execprog 26833 120565 83159 0 3 0x4000082 wait syz-execprog 26833 20891 83159 0 3 0x4000082 thrsleep syz-execprog 26833 159656 83159 0 3 0x4000082 thrsleep syz-execprog 26833 142003 83159 0 3 0x4000082 thrsleep syz-execprog 26833 381928 83159 0 2 0x4000082 syz-execprog 83159 298868 89672 0 3 0x10008a pause ksh 89672 363919 54977 0 3 0x92 select sshd 554 153961 1 0 3 0x100083 ttyin getty 54977 421934 1 0 3 0x80 select sshd 41173 122133 13017 74 3 0x100092 bpf pflogd 13017 377956 1 0 3 0x80 netio pflogd 25214 287682 68406 73 3 0x100090 kqread syslogd 68406 133426 1 0 3 0x100082 netio syslogd 37312 11768 1 77 2 0x100010 dhclient *91441 473231 1 0 7 0 dhclient 14645 456808 0 0 3 0x14200 bored smr 10885 132494 0 0 3 0x14200 pgzero zerothread 54736 351407 0 0 3 0x14200 aiodoned aiodoned 73307 178859 0 0 3 0x14200 syncer update 75700 45032 0 0 3 0x14200 cleaner cleaner 57174 253062 0 0 7 0x14200 reaper 11671 136036 0 0 3 0x14200 pgdaemon pagedaemon 9457 93550 0 0 3 0x14200 bored crynlk 24498 374392 0 0 3 0x14200 bored crypto 34013 59429 0 0 3 0x40014200 acpi0 acpi0 88060 221948 0 0 3 0x40014200 idle1 76770 502594 0 0 3 0x14200 bored softnet 2406 373167 0 0 3 0x14200 bored systqmp 24638 284018 0 0 3 0x14200 bored systq 95816 271609 0 0 3 0x40014200 bored softclock 70943 33262 0 0 3 0x40014200 idle0 1 400316 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 (0xfffffd807effe2c8) #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 91441 (dhclient) thread 0xffff800020e6c4e8 (473231) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82665f20) #0 witness_lock+0x4c7 #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 9463 6393K 6396K 78643K 10560 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 1824 197K 290K 78643K 13058 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 72 12K 12K 78643K 948 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 3037K 3101K 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 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 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 1642 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 4211 0 4211 1 0 1 1 0 8 1 percpumem 16 31 0 1 1 0 1 1 0 8 0 scxspl 192 3832 0 3832 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 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 1 0 1 1 0 8 0 pipepl 120 154 0 145 1 0 1 1 0 8 0 fdescpl 496 226 0 213 3 0 3 3 0 8 0 filepl 152 1116 0 1063 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 1 0 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 80 0 62 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 80 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 127 0 0 8 0 8 8 0 8 0 bufpl 280 2982 0 132 204 0 204 204 0 8 0 anonpl 16 22292 0 20658 13 1 12 12 0 124 4 amapchunkpl 152 870 0 796 5 0 5 5 0 158 1 amappl16 192 143 0 111 2 0 2 2 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 33 0 28 1 0 1 1 0 8 0 amappl13 168 20 0 19 1 0 1 1 0 8 0 amappl12 160 13 0 11 1 0 1 1 0 8 0 amappl11 152 60 0 43 1 0 1 1 0 8 0 amappl10 144 16 0 13 1 0 1 1 0 8 0 amappl9 136 234 0 233 1 0 1 1 0 8 0 amappl8 128 274 0 264 1 0 1 1 0 8 0 amappl7 120 112 0 102 1 0 1 1 0 8 0 amappl6 112 25 0 21 1 0 1 1 0 8 0 amappl5 104 124 0 110 1 0 1 1 0 8 0 amappl4 96 500 0 473 1 0 1 1 0 8 0 amappl3 88 106 0 100 1 0 1 1 0 8 0 amappl2 80 912 0 856 2 0 2 2 0 8 0 amappl1 72 15102 0 14683 23 5 18 18 0 8 8 amappl 80 477 0 448 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 6371 0 6347 2 0 2 2 0 8 0 vmmpepl 168 32482 0 31571 76 4 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 113362 0 109455 104 0 104 104 0 265 70 pmappl 232 225 0 212 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 234 0 3 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(ffffffff821dd823) at panic+0x15c soreceive(fffffd806f6e1190,0,ffff800020ead808,0,0,ffff800020ead714) at soreceive+0x1727 soo_read(fffffd807a5f2428,ffff800020ead808,0) at soo_read+0x53 dofilereadv(ffff800020e6c4e8,6,ffff800020ead808,0,ffff800020ead8f0) at dofilereadv+0x1a1 sys_read(ffff800020e6c4e8,ffff800020ead8a0,ffff800020ead8f0) at sys_read+0x83 syscall(ffff800020ead970) at syscall+0x4a4 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe1b40, 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(ffffffff82665d18) at __mp_lock+0x127 uvm_unmap_detach(ffff800020e5f0b0,1) at uvm_unmap_detach+0xe7 uvm_map_teardown(fffffd807efffcf0) at uvm_map_teardown+0x25c uvmspace_free(fffffd807efffcf0) at uvmspace_free+0x86 uvm_exit(ffff800020e80b98) at uvm_exit+0x29 reaper(ffff800020e19110) 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(ffffffff82665d18) at __mp_lock+0x127 uvm_unmap_detach(ffff800020e5f0b0,1) at uvm_unmap_detach+0xe7 uvm_map_teardown(fffffd807efffcf0) at uvm_map_teardown+0x25c uvmspace_free(fffffd807efffcf0) at uvmspace_free+0x86 uvm_exit(ffff800020e80b98) at uvm_exit+0x29 reaper(ffff800020e19110) at reaper+0x189 end trace frame: 0x0, count: -9 ddb{1}>