[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.672473] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.158134] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 26.583707] random: sshd: uninitialized urandom read (32 bytes read, 43 bits of entropy available) [ 27.539509] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) [ 27.700725] random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available) Warning: Permanently added '10.128.0.40' (ECDSA) to the list of known hosts. [ 33.154476] random: sshd: uninitialized urandom read (32 bytes read, 121 bits of entropy available) 2018/03/21 18:55:18 parsed 1 programs 2018/03/21 18:55:18 executed programs: 0 [ 33.519815] IPVS: Creating netns size=2552 id=1 [ 33.570686] IPVS: Creating netns size=2552 id=2 [ 33.637259] IPVS: Creating netns size=2552 id=3 [ 33.694432] IPVS: Creating netns size=2552 id=4 [ 33.773461] IPVS: Creating netns size=2552 id=5 [ 33.851914] IPVS: Creating netns size=2552 id=6 [ 33.965350] IPVS: Creating netns size=2552 id=7 [ 34.084437] IPVS: Creating netns size=2552 id=8 2018/03/21 18:55:24 executed programs: 8 [ 41.410821] random: nonblocking pool is initialized [ 42.316981] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor0/6745 [ 42.325470] caller is __this_cpu_preempt_check+0x1c/0x20 [ 42.330941] CPU: 0 PID: 6745 Comm: syz-executor0 Not tainted 4.4.120-gd63fdf6 #29 [ 42.338546] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.347884] 0000000000000000 3c5ff6d8063d0032 ffff8800aecd7788 ffffffff81d0408d [ 42.355904] 0000000000000000 ffffffff839fe5a0 ffffffff83cefc20 ffff8801c6c7c800 [ 42.364010] 0000000000000003 ffff8800aecd77c8 ffffffff81d63fe4 ffffffff810002b8 [ 42.372029] Call Trace: [ 42.374601] [] dump_stack+0xc1/0x124 [ 42.379953] [] check_preemption_disabled+0x1d4/0x200 [ 42.386696] [] ? 0xffffffff810002b8 [ 42.392503] [] __this_cpu_preempt_check+0x1c/0x20 [ 42.398994] [] tcp_try_coalesce+0x249/0x4d0 [ 42.404957] [] ? tcp_parse_options+0x970/0x970 [ 42.411180] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 42.418263] [] tcp_queue_rcv+0x127/0x720 [ 42.423959] [] tcp_send_rcvq+0x39b/0x450 [ 42.430350] [] ? tcp_rcv_established+0x2230/0x2230 [ 42.436915] [] ? __local_bh_enable_ip+0x30/0xd0 [ 42.443221] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 42.450044] [] ? lock_sock_nested+0x90/0x120 [ 42.456090] [] ? trace_hardirqs_on+0xd/0x10 [ 42.462051] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 42.468366] [] tcp_sendmsg+0x1e8f/0x2b10 [ 42.474080] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 42.481093] [] ? sock_has_perm+0x1c1/0x400 [ 42.486974] [] ? tcp_sendpage+0x1830/0x1830 [ 42.492991] [] ? inet_sendmsg+0x201/0x4c0 [ 42.498778] [] inet_sendmsg+0x2bc/0x4c0 [ 42.504396] [] ? inet_sendmsg+0x73/0x4c0 [ 42.510100] [] ? inet_recvmsg+0x4c0/0x4c0 [ 42.515976] [] sock_sendmsg+0xca/0x110 [ 42.521519] [] SYSC_sendto+0x2c8/0x340 [ 42.527050] [] ? SYSC_connect+0x310/0x310 [ 42.532837] [] SyS_sendto+0x40/0x50 [ 42.538104] [] ? SyS_getpeername+0x30/0x30 [ 42.543977] [] do_fast_syscall_32+0x321/0x8a0 [ 42.550111] [] sysenter_flags_fixed+0xd/0x17 [ 43.870119] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor0/7306 [ 43.878575] caller is __this_cpu_preempt_check+0x1c/0x20 [ 43.884290] CPU: 1 PID: 7306 Comm: syz-executor0 Not tainted 4.4.120-gd63fdf6 #29 [ 43.891895] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.901321] 0000000000000000 8663b38c1746b703 ffff8800b5d17788 ffffffff81d0408d [ 43.909355] 0000000000000001 ffffffff839fe5a0 ffffffff83cefc20 ffff8800b5f7c800 [ 43.917404] 0000000000000003 ffff8800b5d177c8 ffffffff81d63fe4 ffffffff810002b8 [ 43.925437] Call Trace: [ 43.928016] [] dump_stack+0xc1/0x124 [ 43.933374] [] check_preemption_disabled+0x1d4/0x200 [ 43.940120] [] ? 0xffffffff810002b8 [ 43.945393] [] __this_cpu_preempt_check+0x1c/0x20 [ 43.951876] [] tcp_try_coalesce+0x249/0x4d0 [ 43.957840] [] ? tcp_parse_options+0x970/0x970 [ 43.964057] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 43.971139] [] tcp_queue_rcv+0x127/0x720 [ 43.976838] [] tcp_send_rcvq+0x39b/0x450 [ 43.982534] [] ? tcp_rcv_established+0x2230/0x2230 [ 43.989099] [] ? __local_bh_enable_ip+0x30/0xd0 [ 43.995410] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 44.002243] [] ? lock_sock_nested+0x90/0x120 [ 44.008291] [] ? trace_hardirqs_on+0xd/0x10 [ 44.014266] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 44.020583] [] tcp_sendmsg+0x1e8f/0x2b10 [ 44.026399] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 44.033404] [] ? sock_has_perm+0x1c1/0x400 [ 44.039282] [] ? tcp_sendpage+0x1830/0x1830 [ 44.045242] [] ? inet_sendmsg+0x201/0x4c0 [ 44.051027] [] inet_sendmsg+0x2bc/0x4c0 [ 44.056637] [] ? inet_sendmsg+0x73/0x4c0 [ 44.062344] [] ? inet_recvmsg+0x4c0/0x4c0 [ 44.068120] [] sock_sendmsg+0xca/0x110 [ 44.073628] [] SYSC_sendto+0x2c8/0x340 [ 44.079159] [] ? SYSC_connect+0x310/0x310 [ 44.084931] [] ? lock_sock_nested+0xdc/0x120 [ 44.090965] [] ? do_tcp_setsockopt.isra.33+0xb9/0x1910 [ 44.097867] [] ? selinux_netlbl_sock_rcv_skb+0x400/0x400 [ 44.104938] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 44.111058] [] ? compat_SyS_get_robust_list+0x300/0x300 [ 44.118042] [] ? compat_SyS_setsockopt+0x18a/0x290 [ 44.124592] [] ? sock_common_setsockopt+0xd0/0xd0 [ 44.131055] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 44.137608] [] SyS_sendto+0x40/0x50 [ 44.142858] [] ? SyS_getpeername+0x30/0x30 [ 44.148722] [] do_fast_syscall_32+0x321/0x8a0 [ 44.154842] [] sysenter_flags_fixed+0xd/0x17 2018/03/21 18:55:29 executed programs: 520