[ 18.790122] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 20.041466] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.366601] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 21.198359] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available) [ 21.359275] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) Warning: Permanently added '10.128.15.197' (ECDSA) to the list of known hosts. [ 26.716040] random: sshd: uninitialized urandom read (32 bytes read, 114 bits of entropy available) 2018/02/20 03:02:48 parsed 1 programs 2018/02/20 03:02:48 executed programs: 0 [ 27.084447] IPVS: Creating netns size=2552 id=1 [ 27.129245] IPVS: Creating netns size=2552 id=2 [ 27.170788] IPVS: Creating netns size=2552 id=3 [ 27.230941] IPVS: Creating netns size=2552 id=4 [ 27.304163] IPVS: Creating netns size=2552 id=5 [ 27.366216] IPVS: Creating netns size=2552 id=6 [ 27.468462] IPVS: Creating netns size=2552 id=7 [ 27.560854] IPVS: Creating netns size=2552 id=8 [ 31.768312] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor7/5582 [ 31.776918] caller is __this_cpu_preempt_check+0x1c/0x20 [ 31.782386] CPU: 0 PID: 5582 Comm: syz-executor7 Not tainted 4.4.115-g55a366596 #14 [ 31.790169] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.799514] 0000000000000000 3ba704898a10a8f7 ffff8801c60876c8 ffffffff81d03d8d [ 31.807572] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8801cb604800 [ 31.815595] 0000000000000003 ffff8801c6087708 ffffffff81d63cd4 ffffffff810002b8 [ 31.823603] Call Trace: [ 31.826177] [] dump_stack+0xc1/0x124 [ 31.831529] [] check_preemption_disabled+0x1d4/0x200 [ 31.838262] [] ? 0xffffffff810002b8 [ 31.843538] [] __this_cpu_preempt_check+0x1c/0x20 [ 31.850020] [] tcp_try_coalesce+0x249/0x4d0 [ 31.855981] [] ? tcp_parse_options+0x970/0x970 [ 31.862198] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 31.869285] [] tcp_queue_rcv+0x127/0x720 [ 31.874989] [] tcp_send_rcvq+0x39b/0x450 [ 31.880695] [] ? tcp_rcv_established+0x2230/0x2230 [ 31.887262] [] ? tcp_sendpage+0x17f0/0x1830 [ 31.893222] [] ? lock_sock_nested+0xa2/0x120 [ 31.899265] [] ? lock_sock_nested+0x90/0x120 [ 31.905307] [] ? trace_hardirqs_on+0xd/0x10 [ 31.911267] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 31.917569] [] tcp_sendmsg+0x1e8f/0x2b10 [ 31.923265] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 31.930264] [] ? sock_has_perm+0x1c1/0x400 [ 31.936137] [] ? tcp_sendpage+0x1830/0x1830 [ 31.942100] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 31.949195] [] ? inet_sendmsg+0x73/0x4c0 [ 31.954890] [] ? inet_sendmsg+0x201/0x4c0 [ 31.960673] [] inet_sendmsg+0x2bc/0x4c0 [ 31.966284] [] ? inet_sendmsg+0x73/0x4c0 [ 31.971979] [] ? inet_recvmsg+0x4c0/0x4c0 [ 31.977756] [] sock_sendmsg+0xca/0x110 [ 31.983269] [] ___sys_sendmsg+0x6c1/0x7c0 [ 31.989059] [] ? copy_msghdr_from_user+0x550/0x550 [ 31.995617] [] ? inet_sendmsg+0x201/0x4c0 [ 32.001397] [] ? __fget+0x47/0x3b0 [ 32.006564] [] ? __fget+0x232/0x3b0 [ 32.011810] [] ? __fget+0x47/0x3b0 2018/02/20 03:02:53 executed programs: 41 [ 32.016973] [] ? __fget_light+0xa1/0x1e0 [ 32.022654] [] ? __fdget+0x18/0x20 [ 32.027814] [] __sys_sendmsg+0xd3/0x190 [ 32.033407] [] ? SyS_shutdown+0x1b0/0x1b0 [ 32.039172] [] ? SyS_futex+0x210/0x2c0 [ 32.044679] [] SyS_sendmsg+0x2d/0x50 [ 32.050011] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 32.226508] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor5/5705 [ 32.234986] caller is __this_cpu_preempt_check+0x1c/0x20 [ 32.240427] CPU: 0 PID: 5705 Comm: syz-executor5 Not tainted 4.4.115-g55a366596 #14 [ 32.248199] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.257542] 0000000000000000 a64a08f8e3f6c724 ffff8801d95476c8 ffffffff81d03d8d [ 32.265566] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8801cdf36000 [ 32.273577] 0000000000000003 ffff8801d9547708 ffffffff81d63cd4 ffffffff810002b8 [ 32.281616] Call Trace: [ 32.284189] [] dump_stack+0xc1/0x124 [ 32.289550] [] check_preemption_disabled+0x1d4/0x200 [ 32.296283] [] ? 0xffffffff810002b8 [ 32.301547] [] __this_cpu_preempt_check+0x1c/0x20 [ 32.308032] [] tcp_try_coalesce+0x249/0x4d0 [ 32.314006] [] ? tcp_parse_options+0x970/0x970 [ 32.320233] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 32.327326] [] tcp_queue_rcv+0x127/0x720 [ 32.333024] [] tcp_send_rcvq+0x39b/0x450 [ 32.338718] [] ? tcp_rcv_established+0x2230/0x2230 [ 32.345298] [] ? tcp_sendpage+0x17f0/0x1830 [ 32.351256] [] ? lock_sock_nested+0xa2/0x120 [ 32.357303] [] ? lock_sock_nested+0x90/0x120 [ 32.363344] [] ? trace_hardirqs_on+0xd/0x10 [ 32.369308] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 32.375610] [] tcp_sendmsg+0x1e8f/0x2b10 [ 32.381305] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 32.388312] [] ? sock_has_perm+0x1c1/0x400 [ 32.394186] [] ? tcp_sendpage+0x1830/0x1830 [ 32.400141] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 32.407228] [] ? inet_sendmsg+0x73/0x4c0 [ 32.412922] [] ? inet_sendmsg+0x201/0x4c0 [ 32.418695] [] inet_sendmsg+0x2bc/0x4c0 [ 32.424298] [] ? inet_sendmsg+0x73/0x4c0 [ 32.429991] [] ? inet_recvmsg+0x4c0/0x4c0 [ 32.435768] [] sock_sendmsg+0xca/0x110 [ 32.441274] [] ___sys_sendmsg+0x6c1/0x7c0 [ 32.447038] [] ? copy_msghdr_from_user+0x550/0x550 [ 32.453584] [] ? inet_sendmsg+0x201/0x4c0 [ 32.459351] [] ? __fget+0x47/0x3b0 [ 32.464509] [] ? __fget+0x232/0x3b0 [ 32.469754] [] ? __fget+0x47/0x3b0 [ 32.474912] [] ? __fget_light+0xa1/0x1e0 [ 32.480590] [] ? __fdget+0x18/0x20 [ 32.485749] [] __sys_sendmsg+0xd3/0x190 [ 32.491346] [] ? SyS_shutdown+0x1b0/0x1b0 [ 32.497110] [] ? SyS_futex+0x210/0x2c0 [ 32.502634] [] SyS_sendmsg+0x2d/0x50 [ 32.507966] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 32.818796] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor4/5867 [ 32.827280] caller is __this_cpu_preempt_check+0x1c/0x20 [ 32.832754] CPU: 0 PID: 5867 Comm: syz-executor4 Not tainted 4.4.115-g55a366596 #14 [ 32.840531] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.849877] 0000000000000000 c15a727eb27f0bf3 ffff8800af00f6c8 ffffffff81d03d8d [ 32.857903] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8800badd0000 [ 32.865919] 0000000000000003 ffff8800af00f708 ffffffff81d63cd4 ffffffff810002b8 [ 32.873931] Call Trace: [ 32.876504] [] dump_stack+0xc1/0x124 [ 32.881858] [] check_preemption_disabled+0x1d4/0x200 [ 32.888593] [] ? 0xffffffff810002b8 [ 32.893868] [] __this_cpu_preempt_check+0x1c/0x20 [ 32.900362] [] tcp_try_coalesce+0x249/0x4d0 [ 32.906330] [] ? tcp_parse_options+0x970/0x970 [ 32.912551] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 32.919637] [] tcp_queue_rcv+0x127/0x720 [ 32.925344] [] tcp_send_rcvq+0x39b/0x450 [ 32.931041] [] ? tcp_rcv_established+0x2230/0x2230 [ 32.937605] [] ? tcp_sendpage+0x17f0/0x1830 [ 32.943561] [] ? lock_sock_nested+0xa2/0x120 [ 32.949603] [] ? lock_sock_nested+0x90/0x120 [ 32.955647] [] ? trace_hardirqs_on+0xd/0x10 [ 32.961602] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 32.967913] [] tcp_sendmsg+0x1e8f/0x2b10 [ 32.973621] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 32.980631] [] ? sock_has_perm+0x1c1/0x400 [ 32.986504] [] ? tcp_sendpage+0x1830/0x1830 [ 32.992455] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 32.999539] [] ? inet_sendmsg+0x73/0x4c0 [ 33.005236] [] ? inet_sendmsg+0x201/0x4c0 [ 33.011021] [] inet_sendmsg+0x2bc/0x4c0 [ 33.016630] [] ? inet_sendmsg+0x73/0x4c0 [ 33.022326] [] ? inet_recvmsg+0x4c0/0x4c0 [ 33.028111] [] sock_sendmsg+0xca/0x110 [ 33.033634] [] ___sys_sendmsg+0x6c1/0x7c0 [ 33.039407] [] ? copy_msghdr_from_user+0x550/0x550 [ 33.045955] [] ? inet_sendmsg+0x201/0x4c0 [ 33.051720] [] ? __fget+0x47/0x3b0 [ 33.056877] [] ? __fget+0x232/0x3b0 [ 33.062121] [] ? __fget+0x47/0x3b0 [ 33.067280] [] ? __fget_light+0xa1/0x1e0 [ 33.072972] [] ? __fdget+0x18/0x20 [ 33.078129] [] __sys_sendmsg+0xd3/0x190 [ 33.083722] [] ? SyS_shutdown+0x1b0/0x1b0 [ 33.089487] [] ? SyS_futex+0x210/0x2c0 [ 33.094992] [] SyS_sendmsg+0x2d/0x50 [ 33.100361] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 33.216386] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor1/5957 [ 33.225215] caller is __this_cpu_preempt_check+0x1c/0x20 [ 33.230660] CPU: 0 PID: 5957 Comm: syz-executor1 Not tainted 4.4.115-g55a366596 #14 [ 33.238446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.247779] 0000000000000000 da1794ca711bf902 ffff8801d843f6c8 ffffffff81d03d8d [ 33.255803] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8801c5450000 [ 33.263874] 0000000000000003 ffff8801d843f708 ffffffff81d63cd4 ffffffff810002b8 [ 33.271944] Call Trace: [ 33.274516] [] dump_stack+0xc1/0x124 [ 33.279867] [] check_preemption_disabled+0x1d4/0x200 [ 33.286600] [] ? 0xffffffff810002b8 [ 33.291861] [] __this_cpu_preempt_check+0x1c/0x20 [ 33.298340] [] tcp_try_coalesce+0x249/0x4d0 [ 33.304301] [] ? tcp_parse_options+0x970/0x970 [ 33.310520] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 33.317603] [] tcp_queue_rcv+0x127/0x720 [ 33.323307] [] tcp_send_rcvq+0x39b/0x450 [ 33.329001] [] ? tcp_rcv_established+0x2230/0x2230 [ 33.335563] [] ? tcp_sendpage+0x17f0/0x1830 [ 33.341519] [] ? lock_sock_nested+0xa2/0x120 [ 33.347564] [] ? lock_sock_nested+0x90/0x120 [ 33.353614] [] ? trace_hardirqs_on+0xd/0x10 [ 33.359583] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 33.365892] [] tcp_sendmsg+0x1e8f/0x2b10 [ 33.371593] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 33.378603] [] ? sock_has_perm+0x1c1/0x400 [ 33.384472] [] ? tcp_sendpage+0x1830/0x1830 [ 33.390430] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 33.397512] [] ? inet_sendmsg+0x73/0x4c0 [ 33.403206] [] ? inet_sendmsg+0x201/0x4c0 [ 33.408989] [] inet_sendmsg+0x2bc/0x4c0 [ 33.414598] [] ? inet_sendmsg+0x73/0x4c0 [ 33.417644] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor7/5996 [ 33.417653] caller is __this_cpu_preempt_check+0x1c/0x20 [ 33.434074] [] ? inet_recvmsg+0x4c0/0x4c0 [ 33.439844] [] sock_sendmsg+0xca/0x110 [ 33.445354] [] ___sys_sendmsg+0x6c1/0x7c0 [ 33.451126] [] ? copy_msghdr_from_user+0x550/0x550 [ 33.457680] [] ? inet_sendmsg+0x201/0x4c0 [ 33.463453] [] ? __fget+0x47/0x3b0 [ 33.468616] [] ? __fget+0x232/0x3b0 [ 33.473864] [] ? __fget+0x47/0x3b0 [ 33.479026] [] ? __fget_light+0xa1/0x1e0 [ 33.484706] [] ? __fdget+0x18/0x20 [ 33.489870] [] __sys_sendmsg+0xd3/0x190 [ 33.495468] [] ? SyS_shutdown+0x1b0/0x1b0 [ 33.501242] [] ? SyS_futex+0x210/0x2c0 [ 33.506753] [] SyS_sendmsg+0x2d/0x50 [ 33.512089] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 33.518642] CPU: 1 PID: 5996 Comm: syz-executor7 Not tainted 4.4.115-g55a366596 #14 [ 33.526426] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.535761] 0000000000000000 a9399f3677bafd00 ffff8801cee776c8 ffffffff81d03d8d [ 33.543815] 0000000000000001 ffffffff839fe4a0 ffffffff83cef860 ffff8801d99bc800 [ 33.551853] 0000000000000003 ffff8801cee77708 ffffffff81d63cd4 ffffffff810002b8 [ 33.561305] Call Trace: [ 33.563893] [] dump_stack+0xc1/0x124 [ 33.569242] [] check_preemption_disabled+0x1d4/0x200 [ 33.575976] [] ? 0xffffffff810002b8 [ 33.581254] [] __this_cpu_preempt_check+0x1c/0x20 [ 33.587737] [] tcp_try_coalesce+0x249/0x4d0 [ 33.593709] [] ? tcp_parse_options+0x970/0x970 [ 33.599923] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 33.607005] [] tcp_queue_rcv+0x127/0x720 [ 33.612702] [] tcp_send_rcvq+0x39b/0x450 [ 33.618393] [] ? tcp_rcv_established+0x2230/0x2230 [ 33.624954] [] ? tcp_sendpage+0x17f0/0x1830 [ 33.630909] [] ? lock_sock_nested+0xa2/0x120 [ 33.636954] [] ? lock_sock_nested+0x90/0x120 [ 33.642996] [] ? trace_hardirqs_on+0xd/0x10 [ 33.648960] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 33.655270] [] tcp_sendmsg+0x1e8f/0x2b10 [ 33.660958] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 33.667941] [] ? sock_has_perm+0x1c1/0x400 [ 33.673809] [] ? tcp_sendpage+0x1830/0x1830 [ 33.679768] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 33.686853] [] ? inet_sendmsg+0x73/0x4c0 [ 33.692547] [] ? inet_sendmsg+0x201/0x4c0 [ 33.698321] [] inet_sendmsg+0x2bc/0x4c0 [ 33.703910] [] ? inet_sendmsg+0x73/0x4c0 [ 33.709589] [] ? inet_recvmsg+0x4c0/0x4c0 [ 33.715355] [] sock_sendmsg+0xca/0x110 [ 33.720860] [] ___sys_sendmsg+0x6c1/0x7c0 [ 33.726626] [] ? copy_msghdr_from_user+0x550/0x550 [ 33.733173] [] ? __fget+0x47/0x3b0 [ 33.738329] [] ? __fget+0x232/0x3b0 [ 33.743571] [] ? __fget+0x47/0x3b0 [ 33.748726] [] ? __fget_light+0xa1/0x1e0 [ 33.754402] [] ? __fdget+0x18/0x20 [ 33.759560] [] __sys_sendmsg+0xd3/0x190 [ 33.765150] [] ? SyS_shutdown+0x1b0/0x1b0 [ 33.770915] [] ? finish_task_switch+0x1e7/0x4e0 [ 33.777201] [] ? finish_task_switch+0x1bb/0x4e0 [ 33.783489] [] SyS_sendmsg+0x2d/0x50 [ 33.788823] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 34.905235] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor2/6496 [ 34.913733] caller is __this_cpu_preempt_check+0x1c/0x20 [ 34.919204] CPU: 0 PID: 6496 Comm: syz-executor2 Not tainted 4.4.115-g55a366596 #14 [ 34.926985] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.936331] 0000000000000000 a926cac54a140fd4 ffff8800baa176c8 ffffffff81d03d8d [ 34.944344] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8800b9923000 [ 34.952367] 0000000000000003 ffff8800baa17708 ffffffff81d63cd4 ffffffff810002b8 [ 34.960378] Call Trace: [ 34.962950] [] dump_stack+0xc1/0x124 [ 34.968308] [] check_preemption_disabled+0x1d4/0x200 [ 34.975057] [] ? 0xffffffff810002b8 [ 34.980340] [] __this_cpu_preempt_check+0x1c/0x20 [ 34.986817] [] tcp_try_coalesce+0x249/0x4d0 [ 34.992775] [] ? tcp_parse_options+0x970/0x970 [ 34.998996] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 35.006082] [] tcp_queue_rcv+0x127/0x720 [ 35.011774] [] tcp_send_rcvq+0x39b/0x450 [ 35.017467] [] ? tcp_rcv_established+0x2230/0x2230 [ 35.024033] [] ? tcp_sendpage+0x17f0/0x1830 [ 35.029989] [] ? lock_sock_nested+0xa2/0x120 [ 35.036039] [] ? lock_sock_nested+0x90/0x120 [ 35.042089] [] ? trace_hardirqs_on+0xd/0x10 [ 35.048045] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 35.054363] [] tcp_sendmsg+0x1e8f/0x2b10 [ 35.060068] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 35.067072] [] ? sock_has_perm+0x1c1/0x400 [ 35.072944] [] ? tcp_sendpage+0x1830/0x1830 [ 35.078898] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 35.085975] [] ? inet_sendmsg+0x73/0x4c0 [ 35.091671] [] ? inet_sendmsg+0x201/0x4c0 [ 35.097449] [] inet_sendmsg+0x2bc/0x4c0 [ 35.103041] [] ? inet_sendmsg+0x73/0x4c0 [ 35.108719] [] ? inet_recvmsg+0x4c0/0x4c0 [ 35.114489] [] sock_sendmsg+0xca/0x110 [ 35.120000] [] ___sys_sendmsg+0x6c1/0x7c0 [ 35.125764] [] ? copy_msghdr_from_user+0x550/0x550 [ 35.132311] [] ? inet_sendmsg+0x201/0x4c0 [ 35.138077] [] ? __fget+0x47/0x3b0 [ 35.143233] [] ? __fget+0x232/0x3b0 [ 35.148486] [] ? __fget+0x47/0x3b0 [ 35.153643] [] ? __fget_light+0xa1/0x1e0 [ 35.159318] [] ? __fdget+0x18/0x20 [ 35.164476] [] __sys_sendmsg+0xd3/0x190 [ 35.170067] [] ? SyS_shutdown+0x1b0/0x1b0 [ 35.175837] [] ? SyS_futex+0x210/0x2c0 [ 35.181344] [] SyS_sendmsg+0x2d/0x50 [ 35.186675] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 35.367326] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor5/6601 [ 35.375805] caller is __this_cpu_preempt_check+0x1c/0x20 [ 35.381243] CPU: 0 PID: 6601 Comm: syz-executor5 Not tainted 4.4.115-g55a366596 #14 [ 35.389019] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.398353] 0000000000000000 2ce33b017fbd7725 ffff8801d78976c8 ffffffff81d03d8d [ 35.406416] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8801d85ce000 [ 35.414449] 0000000000000003 ffff8801d7897708 ffffffff81d63cd4 ffffffff810002b8 [ 35.422472] Call Trace: [ 35.425050] [] dump_stack+0xc1/0x124 [ 35.430398] [] check_preemption_disabled+0x1d4/0x200 [ 35.437132] [] ? 0xffffffff810002b8 [ 35.442393] [] __this_cpu_preempt_check+0x1c/0x20 [ 35.448873] [] tcp_try_coalesce+0x249/0x4d0 [ 35.454832] [] ? tcp_parse_options+0x970/0x970 [ 35.461049] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 35.468136] [] tcp_queue_rcv+0x127/0x720 [ 35.473829] [] tcp_send_rcvq+0x39b/0x450 [ 35.479524] [] ? tcp_rcv_established+0x2230/0x2230 [ 35.486103] [] ? tcp_sendpage+0x17f0/0x1830 [ 35.492082] [] ? lock_sock_nested+0xa2/0x120 [ 35.498127] [] ? lock_sock_nested+0x90/0x120 [ 35.504171] [] ? trace_hardirqs_on+0xd/0x10 [ 35.510131] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 35.516524] [] tcp_sendmsg+0x1e8f/0x2b10 [ 35.522230] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 35.529232] [] ? sock_has_perm+0x1c1/0x400 [ 35.535113] [] ? tcp_sendpage+0x1830/0x1830 [ 35.541642] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 35.548728] [] ? inet_sendmsg+0x73/0x4c0 [ 35.554432] [] ? inet_sendmsg+0x201/0x4c0 [ 35.560230] [] inet_sendmsg+0x2bc/0x4c0 [ 35.565845] [] ? inet_sendmsg+0x73/0x4c0 [ 35.571547] [] ? inet_recvmsg+0x4c0/0x4c0 [ 35.577337] [] sock_sendmsg+0xca/0x110 [ 35.582852] [] ___sys_sendmsg+0x6c1/0x7c0 [ 35.588622] [] ? copy_msghdr_from_user+0x550/0x550 [ 35.595179] [] ? inet_sendmsg+0x201/0x4c0 [ 35.600962] [] ? __fget+0x47/0x3b0 [ 35.606132] [] ? __fget+0x232/0x3b0 [ 35.611374] [] ? __fget+0x47/0x3b0 [ 35.616531] [] ? __fget_light+0xa1/0x1e0 [ 35.622210] [] ? __fdget+0x18/0x20 [ 35.627368] [] __sys_sendmsg+0xd3/0x190 [ 35.632957] [] ? SyS_shutdown+0x1b0/0x1b0 [ 35.638721] [] ? SyS_futex+0x210/0x2c0 [ 35.644226] [] SyS_sendmsg+0x2d/0x50 [ 35.649562] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 35.915235] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor7/6757 [ 35.923944] caller is __this_cpu_preempt_check+0x1c/0x20 [ 35.929641] CPU: 0 PID: 6757 Comm: syz-executor7 Not tainted 4.4.115-g55a366596 #14 [ 35.937412] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.946743] 0000000000000000 df81399ab95ea29a ffff8800b9a576c8 ffffffff81d03d8d [ 35.954754] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8800ba460000 [ 35.962754] 0000000000000003 ffff8800b9a57708 ffffffff81d63cd4 ffffffff810002b8 [ 35.970752] Call Trace: [ 35.973324] [] dump_stack+0xc1/0x124 [ 35.978667] [] check_preemption_disabled+0x1d4/0x200 [ 35.985393] [] ? 0xffffffff810002b8 [ 35.990648] [] __this_cpu_preempt_check+0x1c/0x20 [ 35.997119] [] tcp_try_coalesce+0x249/0x4d0 [ 36.003073] [] ? tcp_parse_options+0x970/0x970 [ 36.009288] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 36.016365] [] tcp_queue_rcv+0x127/0x720 [ 36.022051] [] tcp_send_rcvq+0x39b/0x450 [ 36.027739] [] ? tcp_rcv_established+0x2230/0x2230 [ 36.034313] [] ? tcp_sendpage+0x17f0/0x1830 [ 36.040271] [] ? lock_sock_nested+0xa2/0x120 [ 36.046318] [] ? lock_sock_nested+0x90/0x120 [ 36.052363] [] ? trace_hardirqs_on+0xd/0x10 [ 36.058321] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 36.064624] [] tcp_sendmsg+0x1e8f/0x2b10 [ 36.070329] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 36.077339] [] ? sock_has_perm+0x1c1/0x400 [ 36.083214] [] ? tcp_sendpage+0x1830/0x1830 [ 36.089188] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 36.096292] [] ? inet_sendmsg+0x73/0x4c0 [ 36.101999] [] ? inet_sendmsg+0x201/0x4c0 [ 36.107788] [] inet_sendmsg+0x2bc/0x4c0 [ 36.113398] [] ? inet_sendmsg+0x73/0x4c0 [ 36.119106] [] ? inet_recvmsg+0x4c0/0x4c0 [ 36.124898] [] sock_sendmsg+0xca/0x110 [ 36.130446] [] ___sys_sendmsg+0x6c1/0x7c0 [ 36.136235] [] ? copy_msghdr_from_user+0x550/0x550 [ 36.142798] [] ? inet_sendmsg+0x201/0x4c0 [ 36.148584] [] ? __fget+0x47/0x3b0 [ 36.153762] [] ? __fget+0x232/0x3b0 [ 36.159030] [] ? __fget+0x47/0x3b0 [ 36.164222] [] ? __fget_light+0xa1/0x1e0 [ 36.169921] [] ? __fdget+0x18/0x20 [ 36.175100] [] __sys_sendmsg+0xd3/0x190 [ 36.180706] [] ? SyS_shutdown+0x1b0/0x1b0 [ 36.186490] [] ? SyS_futex+0x210/0x2c0 [ 36.192014] [] SyS_sendmsg+0x2d/0x50 [ 36.197365] [] entry_SYSCALL_64_fastpath+0x1c/0x98 2018/02/20 03:02:58 executed programs: 541 [ 38.878270] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor0/7890 [ 38.886752] caller is __this_cpu_preempt_check+0x1c/0x20 [ 38.892461] CPU: 0 PID: 7890 Comm: syz-executor0 Not tainted 4.4.115-g55a366596 #14 [ 38.900235] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.909571] 0000000000000000 1c4abb665d4fc1b0 ffff8800ab7876c8 ffffffff81d03d8d [ 38.917607] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8800b7be6000 [ 38.925623] 0000000000000003 ffff8800ab787708 ffffffff81d63cd4 ffffffff810002b8 [ 38.933653] Call Trace: [ 38.936229] [] dump_stack+0xc1/0x124 [ 38.941581] [] check_preemption_disabled+0x1d4/0x200 [ 38.948316] [] ? 0xffffffff810002b8 [ 38.953579] [] __this_cpu_preempt_check+0x1c/0x20 [ 38.960060] [] tcp_try_coalesce+0x249/0x4d0 [ 38.966029] [] ? tcp_parse_options+0x970/0x970 [ 38.972248] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 38.979333] [] tcp_queue_rcv+0x127/0x720 [ 38.985030] [] tcp_send_rcvq+0x39b/0x450 [ 38.990732] [] ? tcp_rcv_established+0x2230/0x2230 [ 38.997296] [] ? tcp_sendpage+0x17f0/0x1830 [ 39.003253] [] ? lock_sock_nested+0xa2/0x120 [ 39.009298] [] ? lock_sock_nested+0x90/0x120 [ 39.015343] [] ? trace_hardirqs_on+0xd/0x10 [ 39.021311] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 39.027631] [] tcp_sendmsg+0x1e8f/0x2b10 [ 39.033341] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 39.040350] [] ? sock_has_perm+0x1c1/0x400 [ 39.046221] [] ? tcp_sendpage+0x1830/0x1830 [ 39.052180] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 39.059263] [] ? inet_sendmsg+0x73/0x4c0 [ 39.064960] [] ? inet_sendmsg+0x201/0x4c0 [ 39.070742] [] inet_sendmsg+0x2bc/0x4c0 [ 39.076349] [] ? inet_sendmsg+0x73/0x4c0 [ 39.082045] [] ? inet_recvmsg+0x4c0/0x4c0 [ 39.087813] [] sock_sendmsg+0xca/0x110 [ 39.093319] [] ___sys_sendmsg+0x6c1/0x7c0 [ 39.099089] [] ? copy_msghdr_from_user+0x550/0x550 [ 39.105637] [] ? release_sock+0x43/0x510 [ 39.111315] [] ? __fget+0x47/0x3b0 [ 39.116473] [] ? __fget+0x232/0x3b0 [ 39.121715] [] ? __fget+0x47/0x3b0 [ 39.126873] [] ? __fget_light+0xa1/0x1e0 [ 39.132551] [] ? __fdget+0x18/0x20 [ 39.137708] [] __sys_sendmsg+0xd3/0x190 [ 39.143300] [] ? SyS_shutdown+0x1b0/0x1b0 [ 39.149065] [] ? __fd_install+0x224/0x5f0 [ 39.154829] [] ? SyS_futex+0x210/0x2c0 [ 39.160334] [] SyS_sendmsg+0x2d/0x50 [ 39.165672] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 39.264315] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor1/7974 [ 39.273056] caller is __this_cpu_preempt_check+0x1c/0x20 [ 39.278504] CPU: 0 PID: 7974 Comm: syz-executor1 Not tainted 4.4.115-g55a366596 #14 [ 39.286279] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.295612] 0000000000000000 5a9df8d4182e0e05 ffff8801d640f6c8 ffffffff81d03d8d [ 39.303627] 0000000000000000 ffffffff839fe4a0 ffffffff83cef860 ffff8801d4e69800 [ 39.311643] 0000000000000003 ffff8801d640f708 ffffffff81d63cd4 ffffffff810002b8 [ 39.319655] Call Trace: [ 39.322230] [] dump_stack+0xc1/0x124 [ 39.327580] [] check_preemption_disabled+0x1d4/0x200 [ 39.334338] [] ? 0xffffffff810002b8 [ 39.339626] [] __this_cpu_preempt_check+0x1c/0x20 [ 39.346116] [] tcp_try_coalesce+0x249/0x4d0 [ 39.352082] [] ? tcp_parse_options+0x970/0x970 [ 39.358312] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 39.365402] [] tcp_queue_rcv+0x127/0x720 [ 39.371100] [] tcp_send_rcvq+0x39b/0x450 [ 39.376800] [] ? tcp_rcv_established+0x2230/0x2230 [ 39.383375] [] ? tcp_sendpage+0x17f0/0x1830 [ 39.389329] [] ? lock_sock_nested+0xa2/0x120 [ 39.395375] [] ? lock_sock_nested+0x90/0x120 [ 39.401417] [] ? trace_hardirqs_on+0xd/0x10 [ 39.407374] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 39.413676] [] tcp_sendmsg+0x1e8f/0x2b10 [ 39.419373] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 39.426375] [] ? sock_has_perm+0x1c1/0x400 [ 39.432243] [] ? tcp_sendpage+0x1830/0x1830 [ 39.438215] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 39.438227] [] ? inet_sendmsg+0x73/0x4c0 [ 39.438232] [] ? inet_sendmsg+0x201/0x4c0 [ 39.438237] [] inet_sendmsg+0x2bc/0x4c0 [ 39.438242] [] ? inet_sendmsg+0x73/0x4c0 [ 39.438248] [] ? inet_recvmsg+0x4c0/0x4c0 [ 39.438256] [] sock_sendmsg+0xca/0x110 [ 39.438262] [] ___sys_sendmsg+0x6c1/0x7c0 [ 39.438269] [] ? copy_msghdr_from_user+0x550/0x550 [ 39.438275] [] ? inet_sendmsg+0x201/0x4c0 [ 39.438282] [] ? __fget+0x47/0x3b0 [ 39.438288] [] ? __fget+0x232/0x3b0 [ 39.438293] [] ? __fget+0x47/0x3b0 [ 39.438299] [] ? __fget_light+0xa1/0x1e0 [ 39.438305] [] ? __fdget+0x18/0x20 [ 39.438311] [] __sys_sendmsg+0xd3/0x190 [ 39.438317] [] ? SyS_shutdown+0x1b0/0x1b0 [ 39.438325] [] ? SyS_futex+0x210/0x2c0 [ 39.438332] [] SyS_sendmsg+0x2d/0x50 [ 39.438339] [] entry_SYSCALL_64_fastpath+0x1c/0x98