INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-next-kasan-gce-7,10.128.0.17' (ECDSA) to the list of known hosts. 2017/09/03 04:00:28 parsed 1 programs 2017/09/03 04:00:28 executed programs: 0 syzkaller login: [ 41.829112] ------------[ cut here ]------------ [ 41.833895] kernel BUG at mm/slab.c:3256! [ 41.838100] invalid opcode: 0000 [#1] SMP KASAN [ 41.842739] Dumping ftrace buffer: [ 41.846248] (ftrace buffer empty) [ 41.849923] Modules linked in: [ 41.853080] CPU: 0 PID: 2989 Comm: syz-executor0 Not tainted 4.13.0-rc7-next-20170901+ #13 [ 41.861445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.870764] task: ffff8801cf2a6040 task.stack: ffff8801ce008000 [ 41.876791] RIP: 0010:____cache_alloc_node+0x1d7/0x1e0 [ 41.882031] RSP: 0018:ffff8801ce00f638 EFLAGS: 00010096 [ 41.887363] RAX: ffffffffffff8b7b RBX: 0000000001080220 RCX: 0000000000000000 [ 41.894596] RDX: 00000000ffff8b7b RSI: 0000000001080220 RDI: ffff8801dac00040 [ 41.901832] RBP: ffff8801ce00f6c0 R08: 0000000000000000 R09: 0000000000000000 [ 41.909066] R10: 1ffff10039c01de9 R11: 1ffff10039e54e9b R12: ffff8801dac00040 [ 41.916301] R13: ffff8801dac00040 R14: 0000000000000000 R15: 00000000ffff8b7b [ 41.923537] FS: 00007f88e83af700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 41.931726] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.937570] CR2: 0000000020002000 CR3: 00000001ce597000 CR4: 00000000001406f0 [ 41.944815] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.952052] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.959288] Call Trace: [ 41.961841] ? kmem_cache_alloc_node_trace+0xe9/0x760 [ 41.967000] ? lookup_elem_raw+0x181/0x210 [ 41.971206] __kmalloc_node+0x33/0x70 [ 41.974972] alloc_htab_elem+0x2a8/0x480 [ 41.979002] htab_map_update_elem+0x73e/0xb80 [ 41.983466] ? htab_percpu_map_update_elem+0x40/0x40 [ 41.988535] ? __might_sleep+0x95/0x190 [ 41.992477] ? rcutorture_record_progress+0x10/0x10 [ 41.997462] ? htab_percpu_map_update_elem+0x40/0x40 [ 42.002533] SyS_bpf+0x20cb/0x4c50 [ 42.006047] ? bpf_prog_get+0x20/0x20 [ 42.009822] ? get_futex_key+0x1d50/0x1d50 [ 42.014030] ? check_noncircular+0x20/0x20 [ 42.018238] ? do_futex+0x783/0x2130 [ 42.021915] ? vma_set_page_prot+0x16b/0x230 [ 42.026292] ? vma_wants_writenotify+0x3b0/0x3b0 [ 42.031019] ? exit_robust_list+0x240/0x240 [ 42.035304] ? lock_downgrade+0x990/0x990 [ 42.039414] ? SyS_brk+0x6f0/0x6f0 [ 42.042918] ? lock_downgrade+0x990/0x990 [ 42.047028] ? __raw_spin_lock_init+0x1c/0x100 [ 42.051579] ? arch_get_unmapped_area+0x750/0x750 [ 42.056387] ? lock_acquire+0x1d5/0x580 [ 42.060325] ? vm_mmap_pgoff+0x198/0x280 [ 42.064353] ? userfaultfd_unmap_complete+0x327/0x510 [ 42.069516] ? userfaultfd_unmap_prep+0x540/0x540 [ 42.074324] ? do_mmap+0x34f/0xd50 [ 42.077828] ? up_write+0x6b/0x120 [ 42.081333] ? up_read+0x40/0x40 [ 42.084664] ? down_write+0x120/0x120 [ 42.088431] ? security_mmap_file+0x14e/0x190 [ 42.092892] ? vm_mmap_pgoff+0x1fc/0x280 [ 42.096915] ? vm_mmap_pgoff+0x13b/0x280 [ 42.100944] ? vma_is_stack_for_current+0xa0/0xa0 [ 42.105759] ? get_unused_fd_flags+0x121/0x190 [ 42.110309] ? ___sys_recvmsg+0x630/0x630 [ 42.114421] ? __alloc_fd+0x750/0x750 [ 42.118189] ? SyS_futex+0x260/0x390 [ 42.121871] ? SyS_futex+0x269/0x390 [ 42.125565] ? do_futex+0x2130/0x2130 [ 42.129332] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 42.134144] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 42.138866] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.143585] RIP: 0033:0x451e59 [ 42.146739] RSP: 002b:00007f88e83aec08 EFLAGS: 00000216 ORIG_RAX: 0000000000000141 [ 42.154417] RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 0000000000451e59 [ 42.161652] RDX: 0000000000000020 RSI: 0000000020006000 RDI: 0000000000000002 [ 42.168885] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 42.176122] R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b7d9c [ 42.183359] R13: 00000000ffffffff R14: 000000002000b000 R15: 0000000000001000 [ 42.190604] Code: 83 c2 01 89 50 18 4c 03 70 08 e8 15 f4 ff ff 4d 85 f6 0f 85 3e ff ff ff 44 89 fe 4c 89 ef e8 81 fb ff ff 49 89 c6 e9 2b ff ff ff <0f> 0b 0f 0b 0f 0b 0f 1f 00 55 48 89 e5 41 57 41 56 41 55 41 54 [ 42.209679] RIP: ____cache_alloc_node+0x1d7/0x1e0 RSP: ffff8801ce00f638 [ 42.216408] ---[ end trace 00552d83b4995d85 ]--- [ 42.221126] Kernel panic - not syncing: Fatal exception [ 42.226478] Dumping ftrace buffer: [ 42.229985] (ftrace buffer empty) [ 42.233660] Kernel Offset: disabled [ 42.237253] Rebooting in 86400 seconds..