kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Mon Feb 4 12:45:22 PST 2019 OpenBSD/amd64 (ci-openbsd-multicore-9.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.207' (ECDSA) to the list of known hosts. executing program login: panic: malloc: allocation too large, type = 2, size = 2795614184 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *382831 17245 0 0x2 0x4000000 1K syz-executor2248 db_enter() at db_enter+0x18 panic() at panic+0x16c malloc(36455dd5a08d9304,14d435fc,14d435fd) at malloc+0xa20 wsmux_getmux(c7b6ce3cef706f55) at wsmux_getmux+0x6f wsmux_do_ioctl(ca217c08c2c4e4fa,80085761,fffffd806dc3b580,86,fffffd807f7c7ba0) a t wsmux_do_ioctl+0x27d VOP_IOCTL(cc3d0938a6bb866a,80085761,fffffd806fc80980,ffff800020be4970,fffffd806 dc3b580,ffff800020be4970) at VOP_IOCTL+0x80 vn_ioctl(ca217c08c23ebb08,fffffd806fc80980,ffff800020be4970,8) at vn_ioctl+0xc5 sys_ioctl(5f8d3bf0a2d97618,2,ffff800020be4970) at sys_ioctl+0x652 syscall(67f65b3ac8bbd9ae) at syscall+0x5a0 Xsyscall(6,0,a0b5f9e0b8,0,a0b5f9e098,a0b5f9e090) at Xsyscall+0x128 end of kernel end trace frame: 0xa34c699cb0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> show panic malloc: allocation too large, type = 2, size = 2795614184 ddb{1}> trace db_enter() at db_enter+0x18 panic() at panic+0x16c malloc(36455dd5a08d9304,14d435fc,14d435fd) at malloc+0xa20 wsmux_getmux(c7b6ce3cef706f55) at wsmux_getmux+0x6f wsmux_do_ioctl(ca217c08c2c4e4fa,80085761,fffffd806dc3b580,86,fffffd807f7c7ba0) at wsmux_do_ioctl+0x27d VOP_IOCTL(cc3d0938a6bb866a,80085761,fffffd806fc80980,ffff800020be4970,fffffd806dc3b580,ffff800020be4970) at VOP_IOCTL+0x80 vn_ioctl(ca217c08c23ebb08,fffffd806fc80980,ffff800020be4970,8) at vn_ioctl+0xc5 sys_ioctl(5f8d3bf0a2d97618,2,ffff800020be4970) at sys_ioctl+0x652 syscall(67f65b3ac8bbd9ae) at syscall+0x5a0 Xsyscall(6,0,a0b5f9e0b8,0,a0b5f9e098,a0b5f9e090) at Xsyscall+0x128 end of kernel end trace frame: 0xa34c699cb0, count: -10 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020c051f0 rbx 0xffff800020c05290 rdx 0xffffffff81f35469 cy_pio_rec+0x2087 rcx 0x201 rax 0x1 r8 0xffffffff81d85b34 kprintf+0x174 r9 0x1 r10 0xe62a11c22ec938be r11 0xf79f0231ba3595a8 r12 0x3000000008 r13 0xffff800020c05200 r14 0x100 r15 0x1 rip 0xffffffff81bb44e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c051e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor2248) pid=382831 stat=onproc flags process=2 proc=4000000 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020be5528,0xffff800020be5088 process=0xffff800020bca018 user=0xffff800020c00000, vmspace=0xfffffd806e92d170 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17245 205786 89692 0 3 0x82 nanosleep syz-executor2248 *17245 382831 89692 0 7 0x4000002 syz-executor2248 17245 411790 89692 0 3 0x4000082 fsleep syz-executor2248 89692 512604 32999 0 3 0x10008a pause ksh 32999 37111 92509 0 3 0x92 select sshd 63842 252427 1 0 3 0x100083 ttyin getty 92509 393630 1 0 3 0x80 select sshd 48920 15801 34678 73 3 0x100090 kqread syslogd 34678 185649 1 0 3 0x100082 netio syslogd 36475 64864 1 77 3 0x100090 poll dhclient 55137 337687 1 0 3 0x80 poll dhclient 3553 485875 0 0 3 0x14200 pgzero zerothread 8967 391374 0 0 3 0x14200 aiodoned aiodoned 84303 202009 0 0 3 0x14200 syncer update 57742 231278 0 0 3 0x14200 cleaner cleaner 18523 387509 0 0 3 0x14200 reaper reaper 55252 163321 0 0 3 0x14200 pgdaemon pagedaemon 74588 306758 0 0 3 0x14200 bored crynlk 34156 500639 0 0 3 0x14200 bored crypto 50310 33062 0 0 3 0x40014200 acpi0 acpi0 77106 105603 0 0 3 0x40014200 idle1 45344 330094 0 0 3 0x14200 bored softnet 5412 433695 0 0 3 0x14200 bored systqmp 52323 25254 0 0 3 0x14200 bored systq 7621 2927 0 0 3 0x40014200 bored softclock 8928 87325 0 0 7 0x40014200 idle0 1 243798 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 17245 (syz-executor2248) thread 0xffff800020be4970 (382831) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff822d6828) locked @ /syzkaller/managers/multicore/kernel/sys/sys/syscall_mi.h:90 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9442 6315K 6316K 78643K 10529 0 0 pcb 23 9K 9K 78643K 55 0 0 rtable 61 2K 2K 78643K 115 0 0 ifaddr 21 7K 7K 78643K 21 0 0 counters 39 33K 33K 78643K 39 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 1K 1K 78643K 2 0 0 sem 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1792 194K 288K 78643K 12592 0 0 file desc 1 0K 0K 78643K 1 0 0 proc 40 38K 46K 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 52 10K 10K 78643K 662 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 2347K 2411K 78643K 1690 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> 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 14 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 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 tcpqe 32 7 0 7 1 1 0 1 0 8 0 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 272 1383 0 18 92 0 92 92 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 3263 0 3263 3 2 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2367 0 2367 8 7 1 6 0 8 1 sigapl 432 173 0 163 2 0 2 2 0 8 0 futexpl 56 2 0 1 1 0 1 1 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 488 174 0 163 2 0 2 2 0 8 0 filepl 152 809 0 765 2 0 2 2 0 8 0 lockfpl 104 8 0 6 2 1 1 1 0 8 0 lockfspl 32 4 0 3 2 1 1 1 0 8 0 sessionpl 112 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 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 840 188 0 163 4 0 4 4 0 8 0 procpl 600 190 0 163 3 0 3 3 0 8 0 sockpl 384 64 0 48 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 84 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 103 0 0 6 0 6 6 0 8 0 bufpl 256 2012 0 261 110 0 110 110 0 8 0 anonpl 16 17044 0 15904 7 1 6 6 0 125 1 amapchunkpl 152 511 0 472 2 0 2 2 0 158 0 amappl16 192 70 0 65 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 17 0 14 1 0 1 1 0 8 0 amappl12 160 6 0 6 2 1 1 1 0 8 1 amappl11 152 173 0 164 1 0 1 1 0 8 0 amappl10 144 45 0 45 3 2 1 1 0 8 1 amappl9 136 217 0 216 1 0 1 1 0 8 0 amappl8 128 101 0 94 1 0 1 1 0 8 0 amappl7 120 30 0 26 1 0 1 1 0 8 0 amappl6 112 42 0 37 1 0 1 1 0 8 0 amappl5 104 120 0 110 1 0 1 1 0 8 0 amappl4 96 260 0 239 1 0 1 1 0 8 0 amappl3 88 113 0 106 1 0 1 1 0 8 0 amappl2 80 546 0 503 1 0 1 1 0 8 0 amappl1 72 11622 0 11217 14 4 10 14 0 8 0 amappl 72 375 0 354 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 5127 0 5107 1 0 1 1 0 8 0 vmmpepl 168 23366 0 22620 53 19 34 43 0 357 1 vmsppl 360 173 0 163 2 0 2 2 0 8 0 pdppl 4096 355 0 326 5 0 5 5 0 8 0 pvpl 32 70069 0 67266 34 8 26 26 0 265 3 pmappl 224 173 0 163 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 240 0 4 7 0 7 7 0 8 0