[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 20.850073] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.738220] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 26.125163] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 27.099191] random: nonblocking pool is initialized Warning: Permanently added '10.128.15.204' (ECDSA) to the list of known hosts. 2018/02/01 19:38:09 parsed 1 programs 2018/02/01 19:38:09 executed programs: 0 [ 41.528711] IPVS: Creating netns size=2552 id=1 [ 41.585009] IPVS: Creating netns size=2552 id=2 [ 41.631290] IPVS: Creating netns size=2552 id=3 [ 41.684834] IPVS: Creating netns size=2552 id=4 [ 41.740267] IPVS: Creating netns size=2552 id=5 [ 41.784218] IPVS: Creating netns size=2552 id=6 [ 41.859395] IPVS: Creating netns size=2552 id=7 [ 41.943798] IPVS: Creating netns size=2552 id=8 2018/02/01 19:38:14 executed programs: 71 [ 48.551363] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor7/6458 [ 48.560072] caller is __this_cpu_preempt_check+0x1c/0x20 [ 48.565522] CPU: 0 PID: 6458 Comm: syz-executor7 Not tainted 4.4.114-gfe09418 #3 [ 48.573044] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.582384] 0000000000000000 55bad356cc892069 ffff8800b90476c8 ffffffff81d02e6d [ 48.590440] 0000000000000000 ffffffff839fe3a0 ffffffff83cef720 ffff8801d7908000 [ 48.598500] 0000000000000003 ffff8800b9047708 ffffffff81d62db4 ffffffff810002b8 [ 48.606530] Call Trace: [ 48.609106] [] dump_stack+0xc1/0x124 [ 48.614460] [] check_preemption_disabled+0x1d4/0x200 [ 48.621194] [] ? 0xffffffff810002b8 [ 48.626465] [] __this_cpu_preempt_check+0x1c/0x20 [ 48.632943] [] tcp_try_coalesce+0x249/0x4d0 [ 48.638898] [] ? tcp_parse_options+0x970/0x970 [ 48.645116] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 48.652205] [] tcp_queue_rcv+0x127/0x720 [ 48.657923] [] tcp_send_rcvq+0x39b/0x450 [ 48.663627] [] ? tcp_rcv_established+0x2230/0x2230 [ 48.670193] [] ? do_softirq.part.17+0x40/0x60 [ 48.676325] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 48.683157] [] ? lock_sock_nested+0x90/0x120 [ 48.689210] [] ? trace_hardirqs_on+0xd/0x10 [ 48.695172] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 48.701485] [] tcp_sendmsg+0x1e8f/0x2b10 [ 48.707185] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 48.714187] [] ? sock_has_perm+0x1c2/0x3e0 [ 48.720064] [] ? tcp_sendpage+0x1830/0x1830 [ 48.726034] [] ? inet_sendmsg+0x201/0x4c0 [ 48.731822] [] inet_sendmsg+0x2bc/0x4c0 [ 48.737432] [] ? inet_sendmsg+0x73/0x4c0 [ 48.743132] [] ? inet_recvmsg+0x4c0/0x4c0 [ 48.748923] [] sock_sendmsg+0xca/0x110 [ 48.754444] [] ___sys_sendmsg+0x6c1/0x7c0 [ 48.760220] [] ? copy_msghdr_from_user+0x550/0x550 [ 48.766773] [] ? inet_sendmsg+0x201/0x4c0 [ 48.772541] [] ? __fget+0x232/0x3b0 [ 48.777785] [] ? __fget+0x47/0x3b0 [ 48.782942] [] ? __fget_light+0xa1/0x1e0 [ 48.788618] [] ? __fdget+0x18/0x20 [ 48.793777] [] __sys_sendmsg+0xd3/0x190 [ 48.799368] [] ? SyS_shutdown+0x1b0/0x1b0 [ 48.805133] [] ? __fd_install+0x224/0x5f0 [ 48.810897] [] ? SyS_futex+0x210/0x2c0 [ 48.816403] [] SyS_sendmsg+0x2d/0x50 [ 48.821747] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 49.928935] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor1/6830 [ 49.938095] caller is __this_cpu_preempt_check+0x1c/0x20 [ 49.943675] CPU: 1 PID: 6830 Comm: syz-executor1 Not tainted 4.4.114-gfe09418 #3 [ 49.951203] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.960547] 0000000000000000 71765ea97fc54dc8 ffff8800b884f6c8 ffffffff81d02e6d [ 49.968604] 0000000000000001 ffffffff839fe3a0 ffffffff83cef720 ffff8800b9558000 [ 49.976634] 0000000000000003 ffff8800b884f708 ffffffff81d62db4 ffffffff810002b8 [ 49.984674] Call Trace: [ 49.987248] [] dump_stack+0xc1/0x124 [ 49.992603] [] check_preemption_disabled+0x1d4/0x200 [ 49.999345] [] ? 0xffffffff810002b8 [ 50.004606] [] __this_cpu_preempt_check+0x1c/0x20 [ 50.011090] [] tcp_try_coalesce+0x249/0x4d0 [ 50.017054] [] ? tcp_parse_options+0x970/0x970 [ 50.023273] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 50.030357] [] tcp_queue_rcv+0x127/0x720 [ 50.036053] [] tcp_send_rcvq+0x39b/0x450 [ 50.041750] [] ? tcp_rcv_established+0x2230/0x2230 [ 50.048311] [] ? do_softirq.part.17+0x40/0x60 [ 50.054447] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 50.061280] [] ? lock_sock_nested+0x90/0x120 [ 50.067326] [] ? trace_hardirqs_on+0xd/0x10 [ 50.073297] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 50.079691] [] tcp_sendmsg+0x1e8f/0x2b10 [ 50.085403] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 50.092404] [] ? sock_has_perm+0x1c2/0x3e0 [ 50.098286] [] ? tcp_sendpage+0x1830/0x1830 [ 50.104249] [] ? inet_sendmsg+0x201/0x4c0 [ 50.110044] [] inet_sendmsg+0x2bc/0x4c0 [ 50.115656] [] ? inet_sendmsg+0x73/0x4c0 [ 50.121355] [] ? inet_recvmsg+0x4c0/0x4c0 [ 50.127138] [] sock_sendmsg+0xca/0x110 [ 50.132662] [] ___sys_sendmsg+0x6c1/0x7c0 [ 50.138451] [] ? copy_msghdr_from_user+0x550/0x550 [ 50.145022] [] ? __fget+0x232/0x3b0 [ 50.150284] [] ? __fget+0x47/0x3b0 [ 50.155460] [] ? __fget_light+0xa1/0x1e0 [ 50.161163] [] ? __fdget+0x18/0x20 [ 50.166344] [] __sys_sendmsg+0xd3/0x190 [ 50.171957] [] ? SyS_shutdown+0x1b0/0x1b0 [ 50.177756] [] ? __fd_install+0x224/0x5f0 [ 50.183545] [] ? SyS_futex+0x210/0x2c0 [ 50.189065] [] SyS_sendmsg+0x2d/0x50 [ 50.194398] [] entry_SYSCALL_64_fastpath+0x1c/0x98 2018/02/01 19:38:19 executed programs: 535