[....] Starting OpenBSD Secure Shell server: sshd[ 17.425746] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.767344] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 22.121896] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 22.969111] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available) [ 37.744047] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) [ 37.881951] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.16' (ECDSA) to the list of known hosts. 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 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 [ 43.570549] kasan: CONFIG_KASAN_INLINE enabled [ 43.579780] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.598958] Dumping ftrace buffer: [ 43.602462] (ftrace buffer empty) [ 43.606139] Modules linked in: [ 43.609414] CPU: 1 PID: 3967 Comm: syzkaller086512 Not tainted 4.4.116-g17c7c49 #17 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.617172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.626499] task: ffff8801d8ca6000 task.stack: ffff8800bb160000 [ 43.632523] RIP: 0010:[] [] sg_read+0xd17/0x1490 [ 43.640581] RSP: 0018:ffff8800bb167b00 EFLAGS: 00010246 [ 43.645997] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825badce [ 43.653236] RDX: 0000000000000000 RSI: 00000000200001e4 RDI: ffff8801d93b4370 [ 43.660484] RBP: ffff8800bb167c08 R08: 0000000000000000 R09: 0000000000000000 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 [ 43.667719] R10: 0000000000000000 R11: 1ffff1001762cf26 R12: 000000000000006c [ 43.674957] R13: 0000000000000000 R14: ffff8801d9176c00 R15: ffff8801d93b4340 [ 43.682196] FS: 00007ff75e836700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 43.690398] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.696250] CR2: 00007ff75e835e78 CR3: 00000000ae72e000 CR4: 0000000000160670 [ 43.703576] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.710815] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.718057] Stack: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.720171] 0000000000000090 ffffea0007483240 0000000000000000 ffff8801d93b4358 [ 43.728133] ffff8800bb167b70 ffff8801d93b4368 0000000000000090 ffff8801d20c9590 [ 43.736089] ffff8801d4a93900 0000000000001000 1ffff1001762cf6c 00000000200001e4 [ 43.744044] Call Trace: [ 43.746604] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 43.753237] [] ? fsnotify+0xee0/0xee0 [ 43.758664] [] ? iov_iter_advance+0x164/0x4f0 [ 43.764777] [] do_loop_readv_writev+0x141/0x1e0 executing program executing program executing program executing program executing program executing program executing program [ 43.771064] [] ? security_file_permission+0x89/0x1e0 [ 43.777787] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 43.784426] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 43.791057] [] do_readv_writev+0x5dd/0x6e0 [ 43.796913] [] ? vfs_write+0x530/0x530 [ 43.802426] [] ? check_preemption_disabled+0x3b/0x200 [ 43.809230] [] ? __fget+0x47/0x3b0 [ 43.814385] [] ? kasan_slab_free+0x88/0xc0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.820236] [] ? __fget+0x20b/0x3b0 [ 43.825484] [] ? __fget+0x232/0x3b0 [ 43.830733] [] ? __fget+0x47/0x3b0 [ 43.835892] [] vfs_readv+0x78/0xb0 [ 43.841049] [] SyS_readv+0xd9/0x240 [ 43.846293] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 43.852859] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 43.859344] [] entry_SYSCALL_64_fastpath+0x1c/0x98 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.865886] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 97 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 6b 06 00 00 48 8b 1b 48 85 db 0f 84 3b 03 00 [ 43.892331] RIP [] sg_read+0xd17/0x1490 [ 43.898039] RSP [ 43.910678] ---[ end trace 08a190fb84faf845 ]--- [ 43.917838] Kernel panic - not syncing: Fatal exception [ 43.923543] Dumping ftrace buffer: [ 43.927053] (ftrace buffer empty) [ 43.930731] Kernel Offset: disabled [ 43.934327] Rebooting in 86400 seconds..