[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.664985] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.960486] random: sshd: uninitialized urandom read (32 bytes read) [ 25.175517] random: sshd: uninitialized urandom read (32 bytes read) [ 25.737718] random: sshd: uninitialized urandom read (32 bytes read) [ 41.514649] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. [ 46.991409] random: sshd: uninitialized urandom read (32 bytes read) 2018/05/05 20:38:20 parsed 1 programs 2018/05/05 20:38:20 executed programs: 0 [ 47.470365] IPVS: Creating netns size=2536 id=1 [ 47.506878] IPVS: Creating netns size=2536 id=2 [ 47.540005] IPVS: Creating netns size=2536 id=3 [ 47.545580] EXT4-fs error (device loop0): ext4_iget:4557: inode #2: comm syz-executor0: root inode unallocated [ 47.565944] Kernel panic - not syncing: EXT4-fs (device loop0): panic forced after error [ 47.565944] [ 47.575688] CPU: 1 PID: 3841 Comm: syz-executor0 Not tainted 4.9.98-g63a812b #17 [ 47.583205] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.592551] ffff8801d9187590 ffffffff81eb0e89[ 47.595660] EXT4-fs error (device loop5): ext4_iget:4557: inode #2: comm syz-executor5: root inode unallocated [ 47.607218] ffffffff83cf6400 00000000ffffffff [ 47.612062] 0000000000000000 0000000000000001 ffff8801d8c2e718 ffff8801d9187650 [ 47.620087] ffffffff8141f835 0000000041b58ab3 ffffffff843b86e8 ffffffff8141f676 [ 47.628139] Call Trace: [ 47.630731] [] dump_stack+0xc1/0x128 [ 47.636089] [] panic+0x1bf/0x3bc [ 47.641107] [] ? add_taint.cold.6+0x16/0x16 [ 47.647079] [] ? __sync_dirty_buffer+0x139/0x260 [ 47.653486] [] ext4_handle_error.part.116.cold.124+0x1e/0x1e [ 47.660935] [] __ext4_error_inode+0x251/0x350 [ 47.667082] [] ? __ext4_error+0x180/0x180 [ 47.672885] [] ext4_iget+0xa5b/0x3600 [ 47.678337] [] ? __mutex_unlock_slowpath+0x221/0x3c0 [ 47.685096] [] ? __ww_mutex_lock+0x14c0/0x14c0 [ 47.691507] [] ? ext4_get_projid+0x170/0x170 [ 47.698261] [] ? mutex_unlock+0x9/0x10 [ 47.703796] [] ? __alloc_workqueue_key+0x712/0xd90 [ 47.710394] [] ? ext4_calculate_overhead+0xacb/0x1030 [ 47.717237] [] ? debug_object_init+0x16/0x20 [ 47.723297] [] ? mb_cache_create+0x33f/0x450 [ 47.729372] [] ext4_fill_super+0x659e/0xb260 [ 47.735432] [] ? pointer+0x469/0xb00 [ 47.740797] [] ? ext4_calculate_overhead+0x1030/0x1030 [ 47.747741] [] ? pointer+0xb00/0xb00 [ 47.753108] [] ? __mutex_unlock_slowpath+0x25b/0x3c0 [ 47.759865] [] ? snprintf+0xae/0xe0 [ 47.765148] [] ? vsprintf+0x40/0x40 [ 47.770433] [] ? set_blocksize+0x267/0x300 [ 47.776335] [] ? set_bdev_super+0x150/0x150 [ 47.782316] [] mount_bdev+0x2c7/0x390 [ 47.787785] [] ? ext4_calculate_overhead+0x1030/0x1030 [ 47.794894] [] ext4_mount+0x34/0x40 [ 47.800176] [] mount_fs+0x28c/0x370 [ 47.805455] [] vfs_kern_mount.part.29+0xd1/0x3d0 [ 47.811859] [] ? ns_capable_common+0x12a/0x150 [ 47.818102] [] do_mount+0x3c9/0x2740 [ 47.823470] [] ? copy_mount_string+0x40/0x40 [ 47.829526] [] ? kasan_unpoison_shadow+0x35/0x50 [ 47.835938] [] ? kasan_kmalloc+0xc7/0xe0 [ 47.841740] [] ? kmem_cache_alloc_trace+0xfd/0x2b0 [ 47.848322] [] ? copy_mount_options+0x5f/0x320 [ 47.854662] [] ? copy_mount_options+0x1e5/0x320 [ 47.861088] [] SyS_mount+0xfe/0x110 [ 47.866363] [] ? copy_mnt_ns+0x8e0/0x8e0 [ 47.872071] [] do_syscall_64+0x1a6/0x490 [ 47.877782] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 49.040077] Shutting down cpus with NMI [ 49.044651] Dumping ftrace buffer: [ 49.048425] (ftrace buffer empty) [ 49.052131] Kernel Offset: disabled [ 49.055792] Rebooting in 86400 seconds..