[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.690259] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.382118] random: sshd: uninitialized urandom read (32 bytes read) [ 20.662032] random: sshd: uninitialized urandom read (32 bytes read) [ 21.109127] random: sshd: uninitialized urandom read (32 bytes read) [ 24.015111] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.53' (ECDSA) to the list of known hosts. [ 29.452531] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.761362] kasan: CONFIG_KASAN_INLINE enabled [ 29.766056] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.774229] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 29.780461] Dumping ftrace buffer: [ 29.783978] (ftrace buffer empty) [ 29.788361] Modules linked in: [ 29.791755] CPU: 0 PID: 4077 Comm: syz-executor863 Not tainted 4.9.117-g8b21e85 #71 [ 29.799534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.808872] task: ffff8801d91f8000 task.stack: ffff8801d9270000 [ 29.814915] RIP: 0010:[] [] sockfs_setattr+0xbc/0x140 [ 29.823424] RSP: 0018:ffff8801d9277c48 EFLAGS: 00010206 [ 29.828860] RAX: dffffc0000000000 RBX: ffff8801d9277d90 RCX: 0000000000000000 [ 29.836107] RDX: 0000000000000065 RSI: ffffffff83017e8e RDI: 0000000000000328 [ 29.843359] RBP: ffff8801d9277c60 R08: ffff8801d91f8938 R09: 0000000000000001 [ 29.850610] R10: 0000000000000000 R11: 1ffff1003b23f122 R12: 0000000000000000 [ 29.857860] R13: 0000000000000000 R14: ffff8801cbe951e0 R15: 0000000000000000 [ 29.865112] FS: 00007f4bd4c4f700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 29.873601] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.879467] CR2: 0000000020000180 CR3: 00000001c9e80000 CR4: 00000000001606f0 [ 29.886714] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.893957] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.901550] Stack: [ 29.903674] 0000000000001846 ffffffff83017e30 ffff8801d9277d90 ffff8801d9277ce0 [ 29.911669] ffffffff815d4340 ffff8801bb92ddf0 ffff8801d9277cb8 ffff8801cbe95238 [ 29.919660] ffff8801d9277d50 0000000000000004 0000000036fcace8 ffff8801d9922e20 [ 29.927635] Call Trace: [ 29.930200] [] ? sock_sendpage+0xc0/0xc0 [ 29.935886] [] notify_change2+0xac0/0xdf0 [ 29.941655] [] chown_common+0x482/0x550 [ 29.947251] [] ? chmod_common+0x450/0x450 [ 29.953023] [] ? __mnt_want_write+0x1e3/0x270 [ 29.959142] [] SyS_fchownat+0x115/0x1b0 [ 29.964743] [] ? SyS_chmod+0x130/0x130 [ 29.970254] [] ? do_syscall_64+0x48/0x490 [ 29.976038] [] ? SyS_chmod+0x130/0x130 [ 29.981548] [] do_syscall_64+0x1a6/0x490 [ 29.987243] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 29.994140] Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 87 00 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d f0 49 8d bd 28 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 47 48 8d 7b 08 48 b8 00 00 00 [ 30.020957] RIP [] sockfs_setattr+0xbc/0x140 [ 30.027122] RSP [ 30.031073] ---[ end trace efdf73b2c25de416 ]--- [ 30.035932] Kernel panic - not syncing: Fatal exception [ 30.041908] Dumping ftrace buffer: [ 30.045429] (ftrace buffer empty) [ 30.049112] Kernel Offset: disabled [ 30.052731] Rebooting in 86400 seconds..