kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Sun Jan 27 13:07:53 PST 2019 OpenBSD/amd64 (ci-openbsd-main-3.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.178' (ECDSA) to the list of known hosts. executing program login: panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *211443 73897 0 0x2 0 0 syz-executor2444 db_enter() at db_enter+0x18 panic() at panic+0x154 mallocarray(6272ade2300c7486,7fffffff,80000000,82) at mallocarray+0xec wsmux_getmux(19d433a91bf8ed67) at wsmux_getmux+0x6f wsmux_do_ioctl(1ea22aad786082f4,80085761,fffffd80355b18a0,82,fffffd803f7c7ba0) a t wsmux_do_ioctl+0x268 VOP_IOCTL(4100270dde7ab8cb,80085761,fffffd80361ca0f8,ffff80001496c268,fffffd803 55b18a0,ffff80001496c268) at VOP_IOCTL+0x80 vn_ioctl(b72d78449c0c7fe6,fffffd80361ca0f8,ffff80001496c268,8) at vn_ioctl+0xc5 sys_ioctl(10a1d4d71c3c052c,2,ffff80001496c268) at sys_ioctl+0x639 syscall(3a6a3d0078531698) at syscall+0x528 Xsyscall(6,0,7f7ffffdbbd8,0,1,7f7ffffdbbe8) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdbb70, count: 5 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> show panic mallocarray: overflow 18446744071562067968 * 8 ddb> trace db_enter() at db_enter+0x18 panic() at panic+0x154 mallocarray(6272ade2300c7486,7fffffff,80000000,82) at mallocarray+0xec wsmux_getmux(19d433a91bf8ed67) at wsmux_getmux+0x6f wsmux_do_ioctl(1ea22aad786082f4,80085761,fffffd80355b18a0,82,fffffd803f7c7ba0) at wsmux_do_ioctl+0x268 VOP_IOCTL(4100270dde7ab8cb,80085761,fffffd80361ca0f8,ffff80001496c268,fffffd80355b18a0,ffff80001496c268) at VOP_IOCTL+0x80 vn_ioctl(b72d78449c0c7fe6,fffffd80361ca0f8,ffff80001496c268,8) at vn_ioctl+0xc5 sys_ioctl(10a1d4d71c3c052c,2,ffff80001496c268) at sys_ioctl+0x639 syscall(3a6a3d0078531698) at syscall+0x528 Xsyscall(6,0,7f7ffffdbbd8,0,1,7f7ffffdbbe8) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdbb70, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff8000149a3b40 rbx 0xffff8000149a3be0 rdx 0x8b rcx 0x1 rax 0x1 r8 0xffffffff813e1344 kprintf+0x184 r9 0x1 r10 0xf1904ef1063f3204 r11 0xeceda87443a9fab4 r12 0x3000000008 r13 0xffff8000149a3b50 r14 0x100 r15 0x1 rip 0xffffffff8111eb78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000149a3b30 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor2444) pid=211443 stat=onproc flags process=2 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001496c970,0xffffffff82229718 process=0xffff8000ffff73c0 user=0xffff80001499f000, vmspace=0xfffffd803f015210 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *73897 211443 32311 0 7 0x2 syz-executor2444 32311 479400 9047 0 3 0x10008a pause ksh 9047 312248 30285 0 3 0x92 select sshd 48289 132453 1 0 3 0x100083 ttyin getty 30285 349563 1 0 3 0x80 select sshd 108 187453 84761 73 3 0x100090 kqread syslogd 84761 396966 1 0 3 0x100082 netio syslogd 27777 98359 1 77 3 0x100090 poll dhclient 61280 342652 1 0 3 0x80 poll dhclient 57114 460914 0 0 3 0x14200 pgzero zerothread 86401 182935 0 0 3 0x14200 aiodoned aiodoned 57196 21747 0 0 3 0x14200 syncer update 17205 347434 0 0 3 0x14200 cleaner cleaner 62155 130196 0 0 3 0x14200 reaper reaper 81790 389862 0 0 3 0x14200 pgdaemon pagedaemon 63064 94284 0 0 3 0x14200 bored crynlk 54065 293878 0 0 3 0x14200 bored crypto 60252 14071 0 0 3 0x40014200 acpi0 acpi0 97731 173904 0 0 3 0x14200 bored softnet 81814 495473 0 0 3 0x14200 bored systqmp 32188 304465 0 0 3 0x14200 bored systq 96910 218540 0 0 3 0x40014200 bored softclock 98254 208307 0 0 3 0x40014200 idle0 1 266194 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 Kern Lim devbuf 9426 6306K 6307K 78643K 10519 0 0 pcb 23 9K 9K 78643K 55 0 0 rtable 61 1K 2K 78643K 115 0 0 ifaddr 21 7K 7K 78643K 21 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 13 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1166 73K 73K 78643K 1172 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1777 193K 286K 78643K 12501 0 0 file desc 1 0K 0K 78643K 1 0 0 proc 40 30K 38K 78643K 201 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 11 0K 0K 78643K 11 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 149 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 46 2K 3K 78643K 649 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 3 0K 0K 78643K 3 0 0 temp 30 2327K 2391K 78643K 1690 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 2 0 0 1 0 1 1 0 8 0 inpcbpl 280 22 0 16 1 0 1 1 0 8 0 plimitpl 152 13 0 8 1 0 1 1 0 8 0 rtentry 112 23 0 1 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 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1383 0 18 45 0 45 45 0 8 0 ffsino 240 1383 0 18 81 0 81 81 0 8 0 nchpl 144 1554 0 30 57 0 57 57 0 8 0 uvmvnodes 72 1392 0 0 26 0 26 26 0 8 0 vnodes 200 1392 0 0 74 0 74 74 0 8 0 namei 1024 3257 0 3257 3 2 1 1 0 8 1 scxspl 192 2337 0 2337 8 7 1 6 0 8 1 sigapl 432 173 0 163 2 0 2 2 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 104 1 0 0 1 0 1 1 0 8 0 pipepl 112 114 0 107 3 2 1 1 0 8 0 fdescpl 424 174 0 163 2 0 2 2 0 8 0 filepl 120 808 0 765 2 0 2 2 0 8 0 lockfpl 96 7 0 6 2 1 1 1 0 8 0 lockfspl 24 4 0 3 2 1 1 1 0 8 0 sessionpl 112 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 47 0 40 1 0 1 1 0 8 0 zombiepl 144 163 0 163 3 2 1 1 0 8 1 processpl 840 187 0 163 4 1 3 4 0 8 0 procpl 600 187 0 163 3 0 3 3 0 8 0 sockpl 384 64 0 48 2 0 2 2 0 8 0 mcl4k 4096 10 0 10 2 1 1 1 0 8 1 mcl2k 2048 5504 0 5476 6 0 6 6 0 8 2 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9452 0 9415 6 2 4 4 0 8 1 bufpl 256 1997 0 261 109 0 109 109 0 8 0 anonpl 16 16659 0 15558 7 2 5 7 0 62 0 amapchunkpl 152 491 0 456 2 0 2 2 0 158 0 amappl16 192 67 0 62 1 0 1 1 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 1 0 1 1 1 0 1 0 8 0 amappl13 168 15 0 12 1 0 1 1 0 8 0 amappl12 160 6 0 6 2 1 1 1 0 8 1 amappl11 152 172 0 163 1 0 1 1 0 8 0 amappl10 144 45 0 44 1 0 1 1 0 8 0 amappl9 136 193 0 192 1 0 1 1 0 8 0 amappl8 128 101 0 95 1 0 1 1 0 8 0 amappl7 120 30 0 26 1 0 1 1 0 8 0 amappl6 112 42 0 38 1 0 1 1 0 8 0 amappl5 104 154 0 143 1 0 1 1 0 8 0 amappl4 96 252 0 234 1 0 1 1 0 8 0 amappl3 88 111 0 106 1 0 1 1 0 8 0 amappl2 80 552 0 517 1 0 1 1 0 8 0 amappl1 72 11524 0 11133 16 6 10 16 0 8 0 amappl 72 366 0 347 1 0 1 1 0 75 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 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 174 0 163 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 174 0 163 1 0 1 1 0 8 0 vmmpekpl 168 5174 0 5160 1 0 1 1 0 8 0 vmmpepl 168 23283 0 22593 53 19 34 47 0 357 2 vmsppl 264 173 0 163 1 0 1 1 0 8 0 pdppl 4096 354 0 326 5 0 5 5 0 8 0 pvpl 32 69777 0 67046 36 10 26 26 0 265 3 pmappl 192 173 0 163 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 225 0 7 7 0 7 7 0 8 0 ddb>