[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.103132] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.270446] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.451639] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 23.288461] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) [ 23.432536] random: sshd: uninitialized urandom read (32 bytes read, 123 bits of entropy available) Warning: Permanently added '10.128.0.45' (ECDSA) to the list of known hosts. [ 28.766393] random: sshd: uninitialized urandom read (32 bytes read, 125 bits of entropy available) 2018/02/20 04:16:27 parsed 1 programs 2018/02/20 04:16:27 executed programs: 0 [ 29.093878] IPVS: Creating netns size=2552 id=1 [ 29.759280] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor0/3999 [ 29.769194] caller is __this_cpu_preempt_check+0x1c/0x20 [ 29.774745] CPU: 0 PID: 3999 Comm: syz-executor0 Not tainted 4.4.115-g55a366596 #15 [ 29.782519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.791852] 0000000000000000 059edec8fe9d1643 ffff8801d813f630 ffffffff81d03d8d [ 29.799833] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8801d8b1b000 [ 29.807795] 0000000000000003 ffff8801d813f670 ffffffff81d63cd4 ffffffff81237470 [ 29.815762] Call Trace: [ 29.818317] [] dump_stack+0xc1/0x124 [ 29.823649] [] check_preemption_disabled+0x1d4/0x200 [ 29.830378] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 29.837358] [] __this_cpu_preempt_check+0x1c/0x20 [ 29.843821] [] tcp_try_rmem_schedule+0xf2/0x1180 [ 29.850193] [] ? skb_put+0x149/0x1c0 [ 29.855525] [] tcp_send_rcvq+0x1ba/0x450 [ 29.861201] [] ? tcp_rcv_established+0x2230/0x2230 [ 29.867745] [] ? tcp_sendmsg+0xb3/0x2b10 [ 29.873423] [] ? lock_sock_nested+0xa2/0x120 [ 29.879446] [] ? lock_sock_nested+0x90/0x120 [ 29.885474] [] ? trace_hardirqs_on+0xd/0x10 [ 29.891412] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 29.897699] [] tcp_sendmsg+0x1e8f/0x2b10 [ 29.903379] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 29.910360] [] ? sock_has_perm+0x1c1/0x400 [ 29.916215] [] ? tcp_sendpage+0x1830/0x1830 [ 29.922157] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 29.929225] [] ? inet_sendmsg+0x73/0x4c0 [ 29.934902] [] ? inet_sendmsg+0x201/0x4c0 [ 29.940673] [] inet_sendmsg+0x2bc/0x4c0 [ 29.946269] [] ? inet_sendmsg+0x73/0x4c0 [ 29.951945] [] ? inet_recvmsg+0x4c0/0x4c0 [ 29.957718] [] sock_sendmsg+0xca/0x110 [ 29.963224] [] sock_write_iter+0x226/0x3b0 [ 29.969075] [] ? sock_sendmsg+0x110/0x110 [ 29.974842] [] ? compat_rw_copy_check_uvector+0x25d/0x340 [ 29.981999] [] do_iter_readv_writev+0x138/0x1e0 [ 29.988284] [] ? sock_sendmsg+0x110/0x110 [ 29.994048] [] ? vfs_iter_read+0x270/0x270 [ 29.999901] [] ? rw_verify_area+0x100/0x2f0 [ 30.005841] [] ? sock_sendmsg+0x110/0x110 [ 30.011607] [] compat_do_readv_writev+0x2d4/0x6e0 [ 30.018071] [] ? vfs_writev+0xb0/0xb0 [ 30.023491] [] ? exit_robust_list+0x240/0x240 [ 30.029611] [] ? __lru_cache_add+0x164/0x240 [ 30.035636] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.041574] [] ? handle_mm_fault+0x3f2/0x3190 [ 30.047690] [] ? compat_sock_setsockopt.constprop.6+0xad/0x4c0 [ 30.055276] [] compat_writev+0xdc/0x150 [ 30.060868] [] compat_SyS_writev+0xd8/0x1b0 [ 30.066804] [] ? compat_SyS_preadv+0x50/0x50 [ 30.072831] [] ? compat_SyS_preadv+0x50/0x50 [ 30.078859] [] do_fast_syscall_32+0x314/0x890 [ 30.084971] [] sysenter_flags_fixed+0xd/0x17 [ 30.091281] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor0/3999 [ 30.099857] caller is __this_cpu_preempt_check+0x1c/0x20 [ 30.105507] CPU: 0 PID: 3999 Comm: syz-executor0 Not tainted 4.4.115-g55a366596 #15 [ 30.113280] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.122602] 0000000000000000 059edec8fe9d1643 ffff8801d813f630 ffffffff81d03d8d [ 30.130562] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8801d8b1b000 [ 30.138526] 0000000000000003 ffff8801d813f670 ffffffff81d63cd4 ffffffff8313163a [ 30.146492] Call Trace: [ 30.149059] [] dump_stack+0xc1/0x124 [ 30.154390] [] check_preemption_disabled+0x1d4/0x200 [ 30.161109] [] ? tcp_prune_ofo_queue+0x30a/0x420 [ 30.167497] [] __this_cpu_preempt_check+0x1c/0x20 [ 30.173955] [] tcp_try_rmem_schedule+0xe33/0x1180 [ 30.180419] [] tcp_send_rcvq+0x1ba/0x450 [ 30.186097] [] ? tcp_rcv_established+0x2230/0x2230 [ 30.192642] [] ? tcp_sendmsg+0xb3/0x2b10 [ 30.198322] [] ? lock_sock_nested+0xa2/0x120 [ 30.204354] [] ? lock_sock_nested+0x90/0x120 [ 30.210380] [] ? trace_hardirqs_on+0xd/0x10 [ 30.216318] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 30.222608] [] tcp_sendmsg+0x1e8f/0x2b10 [ 30.228296] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 30.235281] [] ? sock_has_perm+0x1c1/0x400 [ 30.241132] [] ? tcp_sendpage+0x1830/0x1830 [ 30.247076] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 30.254145] [] ? inet_sendmsg+0x73/0x4c0 [ 30.259822] [] ? inet_sendmsg+0x201/0x4c0 [ 30.265586] [] inet_sendmsg+0x2bc/0x4c0 [ 30.271175] [] ? inet_sendmsg+0x73/0x4c0 [ 30.276851] [] ? inet_recvmsg+0x4c0/0x4c0 [ 30.282614] [] sock_sendmsg+0xca/0x110 [ 30.288117] [] sock_write_iter+0x226/0x3b0 [ 30.293966] [] ? sock_sendmsg+0x110/0x110 [ 30.299731] [] ? compat_rw_copy_check_uvector+0x25d/0x340 [ 30.306883] [] do_iter_readv_writev+0x138/0x1e0 [ 30.313169] [] ? sock_sendmsg+0x110/0x110 [ 30.318930] [] ? vfs_iter_read+0x270/0x270 [ 30.324778] [] ? rw_verify_area+0x100/0x2f0 [ 30.330714] [] ? sock_sendmsg+0x110/0x110 [ 30.336476] [] compat_do_readv_writev+0x2d4/0x6e0 [ 30.342934] [] ? vfs_writev+0xb0/0xb0 [ 30.348353] [] ? exit_robust_list+0x240/0x240 [ 30.354465] [] ? __lru_cache_add+0x164/0x240 [ 30.360490] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.366429] [] ? handle_mm_fault+0x3f2/0x3190 [ 30.372542] [] ? compat_sock_setsockopt.constprop.6+0xad/0x4c0 [ 30.380126] [] compat_writev+0xdc/0x150 [ 30.385717] [] compat_SyS_writev+0xd8/0x1b0 [ 30.391652] [] ? compat_SyS_preadv+0x50/0x50 [ 30.397674] [] ? compat_SyS_preadv+0x50/0x50 [ 30.403701] [] do_fast_syscall_32+0x314/0x890 [ 30.409810] [