[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.631177] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 13.859661] random: sshd: uninitialized urandom read (32 bytes read) [ 14.285506] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 15.191457] random: sshd: uninitialized urandom read (32 bytes read) [ 21.532839] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.33' (ECDSA) to the list of known hosts. [ 27.030511] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 27.158250] BUG: unable to handle kernel paging request at ffffed005900cbff [ 27.165638] IP: [] fuse_dev_do_write+0x1112/0x20a0 [ 27.172239] PGD 21fffb067 [ 27.174899] PUD 21fff9067 PMD 0 [ 27.178391] [ 27.180108] Oops: 0000 [#1] PREEMPT SMP KASAN [ 27.184631] Dumping ftrace buffer: [ 27.188150] (ftrace buffer empty) [ 27.191852] Modules linked in: [ 27.195147] CPU: 0 PID: 3791 Comm: syz-executor965 Not tainted 4.9.112-g9e79039 #7 [ 27.202839] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.212168] task: ffff8801b9b36000 task.stack: ffff8801d9238000 [ 27.218213] RIP: 0010:[] [] fuse_dev_do_write+0x1112/0x20a0 [ 27.227263] RSP: 0018:ffff8801d923f910 EFLAGS: 00010a07 [ 27.232684] RAX: dffffc0000000000 RBX: ffff8801bb530000 RCX: ffff8801c8066000 [ 27.239943] RDX: 1ffff1005900cbff RSI: ffff8802c8065fff RDI: ffff8801bb5300b0 [ 27.247190] RBP: ffff8801d923fba0 R08: 0000000000000000 R09: 0000000000000001 [ 27.254434] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 [ 27.261692] R13: ffff8801d923fbd0 R14: ffff8801d81de540 R15: 1ffff1003b247f2f [ 27.268953] FS: 00007fc9722dd700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 27.277167] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.283027] CR2: ffffed005900cbff CR3: 00000001be544000 CR4: 00000000001606f0 [ 27.290276] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.297550] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.304810] Stack: [ 27.306935] ffff880100000000 ffff8801d923fbd0 ffff8801bb530000 ffff8801bb5300b0 [ 27.314938] 0000000000000001 ffff880100001000 ffff8801bb53009c ffff8801d81de548 [ 27.322945] ffff8801bb5300a8 ffff8801bb530030 ffff8801d81de550 ffff8801d9015500 [ 27.330961] Call Trace: [ 27.333534] [] ? end_requests+0x140/0x140 [ 27.339316] [] ? futex_wait_setup+0x330/0x330 [ 27.345441] [] ? futex_lock_pi_atomic+0x2b0/0x2b0 [ 27.351922] [] ? fuse_dev_do_read.isra.29.constprop.34+0x6ea/0x1220 [ 27.359956] [] ? get_futex_key+0x1090/0x1090 [ 27.365995] [] ? __lock_acquire+0x654/0x4070 [ 27.372033] [] fuse_dev_write+0x14b/0x1e0 [ 27.377808] [] ? fuse_dev_splice_write+0xbf0/0xbf0 [ 27.384377] [] ? exit_robust_list+0x220/0x220 [ 27.390507] [] ? fsnotify+0x114/0x1100 [ 27.396043] [] ? iov_iter_init+0xaf/0x1d0 [ 27.401821] [] __vfs_write+0x3e0/0x580 [ 27.407348] [] ? default_llseek+0x280/0x280 [ 27.413304] [] ? avc_policy_seqno+0x9/0x20 [ 27.419167] [] ? selinux_file_permission+0x82/0x470 [ 27.425909] [] ? rw_verify_area+0xe5/0x2b0 [ 27.431784] [] vfs_write+0x187/0x530 [ 27.437125] [] SyS_write+0xd9/0x1c0 [ 27.442376] [] ? SyS_read+0x1c0/0x1c0 [ 27.447801] [] ? do_syscall_64+0x48/0x490 [ 27.453573] [] ? SyS_read+0x1c0/0x1c0 [ 27.459000] [] do_syscall_64+0x1a6/0x490 [ 27.464695] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 27.471598] Code: 02 84 c0 74 08 3c 03 0f 8e 76 0d 00 00 8b 83 b0 00 00 00 83 e8 01 48 8d 34 01 48 b8 00 00 00 00 00 fc ff df 48 89 f2 48 c1 ea 03 <0f> b6 04 02 48 89 f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 ab 0b 00 [ 27.498609] RIP [] fuse_dev_do_write+0x1112/0x20a0 [ 27.505295] RSP [ 27.508895] CR2: ffffed005900cbff [ 27.512326] ---[ end trace 2332bc5450e56679 ]--- [ 27.517057] Kernel panic - not syncing: Fatal exception [ 27.522871] Dumping ftrace buffer: [ 27.526385] (ftrace buffer empty) [ 27.530070] Kernel Offset: disabled [ 27.533671] Rebooting in 86400 seconds..