[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.787057] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. [ 20.730258] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.983924] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 21.989770] random: sshd: uninitialized urandom read (32 bytes read, 114 bits of entropy available) [ 22.153900] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts. [ 27.535351] random: sshd: uninitialized urandom read (32 bytes read, 123 bits of entropy available) 2018/03/01 01:41:32 parsed 1 programs 2018/03/01 01:41:32 executed programs: 0 [ 27.916473] IPVS: Creating netns size=2552 id=1 [ 27.945743] IPVS: Creating netns size=2552 id=2 [ 27.985397] IPVS: Creating netns size=2552 id=3 [ 28.014731] IPVS: Creating netns size=2552 id=4 [ 28.047037] IPVS: Creating netns size=2552 id=5 [ 28.084745] IPVS: Creating netns size=2552 id=6 [ 28.139758] IPVS: Creating netns size=2552 id=7 [ 28.192713] IPVS: Creating netns size=2552 id=8 [ 30.742831] ------------[ cut here ]------------ [ 30.747624] WARNING: CPU: 1 PID: 4192 at kernel/locking/lockdep.c:728 __lock_acquire+0x3055/0x4b50() [ 30.756862] Kernel panic - not syncing: panic_on_warn set ... [ 30.756862] [ 30.764208] CPU: 1 PID: 4192 Comm: syz-executor6 Not tainted 4.4.119-g024f962 #26 [ 30.771798] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.781121] 0000000000000000 47826dba128b9550 ffff8801d8cff5e8 ffffffff81d0402d [ 30.789103] ffffffff83843b40 ffff8801d8cff6c0 ffffffff83855920 0000000000000009 [ 30.797079] 00000000000002d8 ffff8801d8cff6b0 ffffffff8141aaea 0000000041b58ab3 [ 30.805064] Call Trace: [ 30.807625] [] dump_stack+0xc1/0x124 [ 30.812962] [] panic+0x1aa/0x388 [ 30.817950] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 30.824849] [] ? pm_qos_get_value.part.4+0xb/0xb [ 30.831229] [] ? warn_slowpath_common+0x10a/0x140 [ 30.837707] [] warn_slowpath_common+0x125/0x140 [ 30.843994] [] ? __lock_acquire+0x3055/0x4b50 [ 30.850107] [] warn_slowpath_null+0x29/0x30 [ 30.856048] [] __lock_acquire+0x3055/0x4b50 [ 30.862002] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 30.868983] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 30.875966] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.882776] [] ? _raw_spin_unlock_irq+0x38/0x50 [ 30.889069] [] ? finish_task_switch+0x1e7/0x4e0 [ 30.895363] [] ? finish_task_switch+0x1bb/0x4e0 [ 30.901650] [] ? __schedule+0xa26/0x1ca0 [ 30.907331] [] lock_acquire+0x15e/0x460 [ 30.912930] [] ? lock_sock_nested+0x43/0x120 [ 30.918957] [] ? get_parent_ip+0xd/0x50 [ 30.924551] [] _raw_spin_lock_bh+0x3a/0x50 [ 30.930416] [] ? lock_sock_nested+0x43/0x120 [ 30.936444] [] lock_sock_nested+0x43/0x120 [ 30.942299] [] ? __might_fault+0x18e/0x1d0 [ 30.948153] [] do_ip_getsockopt+0x16a/0x1530 [ 30.954179] [] ? ip_ra_destroy_rcu+0x70/0x70 [ 30.960211] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 30.967201] [] ? futex_wait_setup+0x330/0x330 [ 30.973327] [] ? __lock_acquire+0xb5f/0x4b50 [ 30.979365] [] ? avc_has_perm+0x296/0x500 [ 30.985132] [] ? avc_has_perm+0x309/0x500 [ 30.990898] [] ? avc_has_perm+0xb6/0x500 [ 30.996580] [] ? avc_has_perm_noaudit+0x460/0x460 [ 31.003043] [] ? sock_has_perm+0x1c1/0x400 [ 31.008896] [] ? sock_has_perm+0x29f/0x400 [ 31.014752] [] ? sock_has_perm+0x9f/0x400 [ 31.020518] [] ip_getsockopt+0x8f/0x180 [ 31.026111] [] ? do_ip_getsockopt+0x1530/0x1530 [ 31.032405] [] ? __fget+0x23a/0x3b0 [ 31.037656] [] udp_getsockopt+0x45/0x80 [ 31.043252] [] sock_common_getsockopt+0x95/0xd0 [ 31.049541] [] SyS_getsockopt+0x14a/0x230 [ 31.055306] [] ? SyS_setsockopt+0x250/0x250 [ 31.061254] [] ? retint_user+0x18/0x3c [ 31.066860] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 31.073333] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 31.080306] Dumping ftrace buffer: [ 31.083819] (ftrace buffer empty) [ 31.087517] Kernel Offset: disabled [ 31.091116] Rebooting in 86400 seconds..