[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 10.036474] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.050258] random: sshd: uninitialized urandom read (32 bytes read) [ 29.075386] random: crng init done Warning: Permanently added '10.128.0.121' (ECDSA) to the list of known hosts. 2018/10/20 18:07:46 parsed 1 programs 2018/10/20 18:07:47 executed programs: 0 [ 39.103706] audit: type=1400 audit(1540058868.996:5): avc: denied { associate } for pid=2064 comm="syz-executor0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 [ 39.670595] kasan: CONFIG_KASAN_INLINE enabled [ 39.675191] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.682879] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.689224] Modules linked in: [ 39.692525] CPU: 1 PID: 2758 Comm: syz-executor0 Not tainted 4.9.135+ #57 [ 39.699526] task: ffff8801c55a4740 task.stack: ffff8801c4e78000 [ 39.705568] RIP: 0010:[] [] n_tty_set_termios+0x2a3/0xd30 [ 39.714422] RSP: 0018:ffff8801c4e7f7b0 EFLAGS: 00010203 [ 39.719845] RAX: 00000000000007ff RBX: 0000000000000000 RCX: 000000000000000b [ 39.727090] RDX: dffffc0000000000 RSI: ffffffff81d2361f RDI: ffff8801c4e7f854 [ 39.734383] RBP: ffff8801c4e7f7e8 R08: ffff8801c55a5060 R09: 39dcd536341304cb [ 39.741640] R10: ffff8801c55a4740 R11: 0000000000000001 R12: ffff8801d38d2a80 [ 39.748892] R13: ffff8801d38d2e34 R14: 000000000000005d R15: ffff8801c4e7f848 [ 39.756141] FS: 00007fa199aa9700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 [ 39.764384] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.770255] CR2: 00007ffd948577d0 CR3: 00000001d31e7000 CR4: 00000000001606b0 [ 39.777509] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.784757] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.792088] Stack: [ 39.794211] ffff8801d38d2a80 ffff8801000007ff ffff8801d691f800 ffffffff81d23390 [ 39.802272] dffffc0000000000 ffff8801d38d2e4c ffff8801d38d2a80 ffff8801c4e7f8d0 [ 39.810268] ffffffff81d2e276 0000fffac4e7f8d0 00ffffff000000bf 1ffff100389cff05 [ 39.818341] Call Trace: [ 39.820909] [] ? process_echoes+0x150/0x150 [ 39.826857] [] tty_set_termios+0x626/0x8a0 [ 39.832721] [] ? tty_wait_until_sent+0x4d0/0x4d0 [ 39.839105] [] set_termios+0x38f/0x620 [ 39.844632] [] ? __tty_perform_flush+0x220/0x220 [ 39.851064] [] ? ldsem_down_read+0x32/0x40 [ 39.856934] [] tty_mode_ioctl+0x777/0x980 [ 39.862918] [] ? tty_perform_flush+0x80/0x80 [ 39.868964] [] ? __ldsem_down_read_nested+0xce/0x610 [ 39.875704] [] ? ldsem_down_read+0x32/0x40 [ 39.881572] [] ? get_futex_key_refs.isra.4+0xa0/0xa0 [ 39.888362] [] ? __ww_mutex_lock_interruptible+0x1480/0x1480 [ 39.895801] [] ? __ldsem_wake+0x330/0x330 [ 39.901585] [] n_tty_ioctl_helper+0x44/0x370 [ 39.907633] [] n_tty_ioctl+0x46/0x2e0 [ 39.913070] [] ? ldsem_down_read+0x32/0x40 [ 39.918945] [] tty_ioctl+0x440/0x2190 [ 39.924383] [] ? n_tty_receive_buf+0x40/0x40 [ 39.930422] [] ? no_tty+0xa0/0xa0 [ 39.935521] [] ? avc_ss_reset+0x110/0x110 [ 39.941311] [] ? __lock_acquire+0x654/0x4a10 [ 39.947365] [] ? __might_sleep+0x95/0x1a0 [ 39.953151] [] ? no_tty+0xa0/0xa0 [ 39.958248] [] do_vfs_ioctl+0x1ac/0x11a0 [ 39.964022] [] ? ioctl_preallocate+0x220/0x220 [ 39.970250] [] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 39.977771] [] ? check_preemption_disabled+0x3b/0x170 [ 39.984659] [] ? __fget+0x214/0x3d0 [ 39.990033] [] ? __fget+0x23b/0x3d0 [ 39.995306] [] ? __fget+0x47/0x3d0 [ 40.000552] [] ? security_file_ioctl+0x8f/0xc0 [ 40.006818] [] SyS_ioctl+0x8f/0xc0 [ 40.011997] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 40.017957] [] do_syscall_64+0x19f/0x550 [ 40.023659] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 40.030603] Code: d2 0f 85 9b 09 00 00 41 8b 84 24 b4 03 00 00 89 45 d0 e8 c1 7e 5f ff 4c 89 f1 8b 45 d0 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 <0f> b6 14 11 4c 89 f1 83 e1 07 d1 e8 83 e0 01 38 ca 7f 08 84 d2 [ 40.057710] RIP [] n_tty_set_termios+0x2a3/0xd30 [ 40.064215] RSP [ 40.068154] ---[ end trace ab6ce95405d0fd4e ]--- [ 40.073017] Kernel panic - not syncing: Fatal exception [ 40.078675] Kernel Offset: disabled [ 40.082294] Rebooting in 86400 seconds..