[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.490593] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.855456] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 25.221092] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 26.761225] random: sshd: uninitialized urandom read (32 bytes read, 127 bits of entropy available) [ 26.879021] random: nonblocking pool is initialized Warning: Permanently added '10.128.15.206' (ECDSA) to the list of known hosts. 2018/07/19 13:02:08 parsed 1 programs 2018/07/19 13:02:09 executed programs: 0 [ 34.658538] IPVS: Creating netns size=2552 id=1 [ 34.732689] IPVS: Creating netns size=2552 id=2 [ 34.806286] IPVS: Creating netns size=2552 id=3 [ 34.887433] IPVS: Creating netns size=2552 id=4 [ 35.072780] IPVS: Creating netns size=2552 id=5 [ 35.281949] IPVS: Creating netns size=2552 id=6 [ 35.506504] IPVS: Creating netns size=2552 id=7 [ 35.695379] IPVS: Creating netns size=2552 id=8 [ 35.777792] kasan: CONFIG_KASAN_INLINE enabled [ 35.783828] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.812723] Dumping ftrace buffer: [ 35.816250] (ftrace buffer empty) [ 35.819947] Modules linked in: [ 35.823252] CPU: 0 PID: 4062 Comm: syz-executor3 Not tainted 4.4.141-g1b37d68 #71 [ 35.830856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.840239] task: ffff8801d9be1800 task.stack: ffff8800b9878000 [ 35.846568] RIP: 0010:[] [] loop_validate_file+0x20d/0x400 [ 35.856514] RSP: 0018:ffff8800b987fb70 EFLAGS: 00010206 [ 35.861955] RAX: 0000000000000036 RBX: dffffc0000000000 RCX: 0000000000000000 [ 35.869232] RDX: 0000000000000000 RSI: ffffffff8251542d RDI: 00000000000001b0 [ 35.876497] RBP: ffff8800b987fb88 R08: ffff8801d9be2128 R09: 0000000000000001 [ 35.883764] R10: 0000000000000000 R11: ffff8801d9be1800 R12: 0000000000000000 [ 35.891031] R13: ffff8800ba0b2e00 R14: ffff8800ba0b2e00 R15: ffff8801d6fc60d8 [ 35.898301] FS: 00007fc978052700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 35.906524] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.912400] CR2: 00000000017258c0 CR3: 00000000b2b14000 CR4: 00000000001606f0 [ 35.919667] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.926935] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.934202] Stack: [ 35.936339] ffff8801d6fc5f80 0000000000004c00 ffff8800bb3f7a00 ffff8800b987fc18 [ 35.944369] ffffffff8251bc77 0000000b0000004c 0000000100000000 0000000000000000 [ 35.952420] 0000000300000001 000000000000004c 0000000041b58ab3 ffff8801d6fc60d0 [ 35.960632] Call Trace: [ 35.963217] [] lo_ioctl+0x6a7/0x16c0 [ 35.968575] [] ? avc_ss_reset+0x110/0x110 [ 35.974368] [] ? loop_probe+0x180/0x180 [ 35.979988] [] blkdev_ioctl+0x7b8/0x19c0 [ 35.985782] [] ? blkpg_ioctl+0x900/0x900 [ 35.991492] [] ? debug_check_no_locks_freed+0x210/0x210 [ 35.994801] blk_update_request: I/O error, dev loop3, sector 0 [ 36.004458] [] ? quarantine_put+0xda/0x180 [ 36.010345] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 36.017185] [] ? check_preemption_disabled+0x3b/0x170 [ 36.024056] [] block_ioctl+0xde/0x120 [ 36.029507] [] ? blkdev_read_iter+0x170/0x170 [ 36.035666] [] do_vfs_ioctl+0x63f/0xf40 [ 36.041288] [] ? ioctl_preallocate+0x1f0/0x1f0 [ 36.047523] [] ? evict_inodes+0x240/0x360 [ 36.053323] [] ? __fget+0x16f/0x3b0 [ 36.058600] [] ? __fget+0x47/0x3b0 [ 36.063790] [] ? security_file_ioctl+0x8f/0xc0 [ 36.070019] [] SyS_ioctl+0x8f/0xc0 [ 36.075318] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 36.081879] Code: 00 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 f7 01 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b0 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 cc 01 00 00 4d 8b a4 24 b0 01 00 00 4c 89 e0 [ 36.109276] RIP [] loop_validate_file+0x20d/0x400 [ 36.115933] RSP [ 36.125315] ---[ end trace e06a10220708838e ]--- [ 36.145026] Kernel panic - not syncing: Fatal exception [ 36.151107] Dumping ftrace buffer: [ 36.154644] (ftrace buffer empty) [ 36.158327] Kernel Offset: disabled [ 36.161973] Rebooting in 86400 seconds..