[ 21.682240] 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: [ 25.393693] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 25.747170] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 26.698983] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available) [ 26.869835] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) Warning: Permanently added '10.128.0.9' (ECDSA) to the list of known hosts. [ 49.048151] random: sshd: uninitialized urandom read (32 bytes read, 121 bits of entropy available) 2018/02/03 14:46:17 parsed 1 programs 2018/02/03 14:46:17 executed programs: 0 [ 49.422971] IPVS: Creating netns size=2552 id=1 [ 49.462371] IPVS: Creating netns size=2552 id=2 [ 49.510326] IPVS: Creating netns size=2552 id=3 [ 49.546984] IPVS: Creating netns size=2552 id=4 [ 49.597155] IPVS: Creating netns size=2552 id=5 [ 49.646217] IPVS: Creating netns size=2552 id=6 [ 49.739419] IPVS: Creating netns size=2552 id=7 [ 49.812037] IPVS: Creating netns size=2552 id=8 [ 53.498135] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor3/5450 [ 53.506941] caller is __this_cpu_preempt_check+0x1c/0x20 [ 53.512385] CPU: 1 PID: 5450 Comm: syz-executor3 Not tainted 4.4.114-g4e74e98 #5 [ 53.519966] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.529314] 0000000000000000 4025c7d72d6d07f2 ffff8801d248f648 ffffffff81d03d2d [ 53.537379] 0000000000000001 ffffffff839fe3a0 ffffffff83cef720 ffff8801ceb51800 [ 53.545405] 0000000000000003 ffff8801d248f688 ffffffff81d63c74 ffffffff810002b8 [ 53.553448] Call Trace: [ 53.556028] [] dump_stack+0xc1/0x124 [ 53.561388] [] check_preemption_disabled+0x1d4/0x200 [ 53.568146] [] ? 0xffffffff810002b8 [ 53.573424] [] __this_cpu_preempt_check+0x1c/0x20 [ 53.579915] [] tcp_try_coalesce+0x249/0x4d0 [ 53.585885] [] ? tcp_parse_options+0x970/0x970 [ 53.592119] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 53.599224] [] tcp_queue_rcv+0x127/0x720 [ 53.604943] [] tcp_send_rcvq+0x39b/0x450 [ 53.610658] [] ? tcp_rcv_established+0x2230/0x2230 [ 53.617232] [] ? do_softirq.part.17+0x40/0x60 [ 53.623381] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 53.630226] [] ? lock_sock_nested+0x90/0x120 [ 53.636282] [] ? trace_hardirqs_on+0xd/0x10 [ 53.642246] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 53.648559] [] tcp_sendmsg+0x1e8f/0x2b10 [ 53.654267] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 53.661282] [] ? sock_has_perm+0x1c2/0x3e0 [ 53.667169] [] ? tcp_sendpage+0x1830/0x1830 [ 53.673152] [] ? inet_sendmsg+0x201/0x4c0 [ 53.678955] [] inet_sendmsg+0x2bc/0x4c0 [ 53.684575] [] ? inet_sendmsg+0x73/0x4c0 [ 53.690289] [] ? inet_recvmsg+0x4c0/0x4c0 [ 53.696089] [] sock_sendmsg+0xca/0x110 [ 53.701632] [] ___sys_sendmsg+0x6c1/0x7c0 [ 53.707423] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 53.714445] [] ? copy_msghdr_from_user+0x550/0x550 [ 53.721019] [] ? __fget+0x232/0x3b0 [ 53.726295] [] ? __fget+0x47/0x3b0 [ 53.731478] [] ? __fget_light+0xa1/0x1e0 [ 53.737185] [] ? __fdget+0x18/0x20 [ 53.742372] [] ? sockfd_lookup_light+0x118/0x160 [ 53.748783] [] __sys_sendmsg+0xd3/0x190 [ 53.754404] [] ? SyS_shutdown+0x1b0/0x1b0 [ 53.760196] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 53.766338] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 53.772910] [] compat_SyS_sendmsg+0x2a/0x40 [ 53.778880] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 53.785458] [] do_fast_syscall_32+0x314/0x890 [ 53.791589] [] sysenter_flags_fixed+0xd/0x17 [ 53.877316] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor7/5503 [ 53.885809] caller is __this_cpu_preempt_check+0x1c/0x20 [ 53.891252] CPU: 0 PID: 5503 Comm: syz-executor7 Not tainted 4.4.114-g4e74e98 #5 [ 53.898780] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.908136] 0000000000000000 9ed3082f8e0882c0 ffff8800af947648 ffffffff81d03d2d [ 53.916186] 0000000000000000 ffffffff839fe3a0 ffffffff83cef720 ffff8801cb5fb000 [ 53.924236] 0000000000000003 ffff8800af947688 ffffffff81d63c74 ffffffff810002b8 [ 53.932260] Call Trace: [ 53.934844] [] dump_stack+0xc1/0x124 [ 53.940199] [] check_preemption_disabled+0x1d4/0x200 [ 53.946939] [] ? 0xffffffff810002b8 [ 53.952216] [] __this_cpu_preempt_check+0x1c/0x20 [ 53.958714] [] tcp_try_coalesce+0x249/0x4d0 [ 53.964691] [] ? tcp_parse_options+0x970/0x970 [ 53.970934] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 53.978043] [] tcp_queue_rcv+0x127/0x720 [ 53.983756] [] tcp_send_rcvq+0x39b/0x450 [ 53.989476] [] ? tcp_rcv_established+0x2230/0x2230 [ 53.996064] [] ? do_softirq.part.17+0x40/0x60 [ 54.002216] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 54.009055] [] ? lock_sock_nested+0x90/0x120 [ 54.015115] [] ? trace_hardirqs_on+0xd/0x10 [ 54.021094] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 54.027415] [] tcp_sendmsg+0x1e8f/0x2b10 [ 54.033136] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 54.040166] [] ? sock_has_perm+0x1c2/0x3e0 [ 54.046048] [] ? tcp_sendpage+0x1830/0x1830 [ 54.052021] [] ? inet_sendmsg+0x201/0x4c0 [ 54.057824] [] inet_sendmsg+0x2bc/0x4c0 [ 54.063444] [] ? inet_sendmsg+0x73/0x4c0 [ 54.069153] [] ? inet_recvmsg+0x4c0/0x4c0 [ 54.074942] [] sock_sendmsg+0xca/0x110 [ 54.080477] [] ___sys_sendmsg+0x6c1/0x7c0 [ 54.086283] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 54.093294] [] ? copy_msghdr_from_user+0x550/0x550 [ 54.099870] [] ? __fget+0x232/0x3b0 [ 54.105146] [] ? __fget+0x47/0x3b0 [ 54.110333] [] ? __fget_light+0xa1/0x1e0 [ 54.116044] [] ? __fdget+0x18/0x20 [ 54.121229] [] ? sockfd_lookup_light+0x118/0x160 [ 54.127632] [] __sys_sendmsg+0xd3/0x190 [ 54.133244] [] ? SyS_shutdown+0x1b0/0x1b0 [ 54.139031] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 54.145175] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 54.151751] [] compat_SyS_sendmsg+0x2a/0x40 [ 54.157696] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 54.164257] [] do_fast_syscall_32+0x314/0x890 [ 54.170383] [] sysenter_flags_fixed+0xd/0x17 [ 54.255698] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor4/5567 [ 54.264192] caller is __this_cpu_preempt_check+0x1c/0x20 [ 54.269674] CPU: 0 PID: 5567 Comm: syz-executor4 Not tainted 4.4.114-g4e74e98 #5 [ 54.277199] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.286551] 0000000000000000 fe0facc30d4f9697 ffff8800ba467648 ffffffff81d03d2d [ 54.294583] 0000000000000000 ffffffff839fe3a0 ffffffff83cef720 ffff8801d1090000 [ 54.302631] 0000000000000003 ffff8800ba467688 ffffffff81d63c74 ffffffff810002b8 [ 54.310666] Call Trace: [ 54.313240] [] dump_stack+0xc1/0x124 [ 54.318598] [] check_preemption_disabled+0x1d4/0x200 [ 54.325344] [] ? 0xffffffff810002b8 [ 54.330618] [] __this_cpu_preempt_check+0x1c/0x20 [ 54.337110] [] tcp_try_coalesce+0x249/0x4d0 [ 54.343089] [] ? tcp_parse_options+0x970/0x970 [ 54.349327] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 54.356429] [] tcp_queue_rcv+0x127/0x720 [ 54.362137] [] tcp_send_rcvq+0x39b/0x450 [ 54.367852] [] ? tcp_rcv_established+0x2230/0x2230 [ 54.374428] [] ? do_softirq.part.17+0x40/0x60 [ 54.380574] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 54.387408] [] ? lock_sock_nested+0x90/0x120 [ 54.393464] [] ? trace_hardirqs_on+0xd/0x10 [ 54.399429] [] ? __local_bh_enable_ip+0x6a/0xd0 2018/02/03 14:46:22 executed programs: 167 [ 54.405746] [] tcp_sendmsg+0x1e8f/0x2b10 [ 54.411452] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 54.418464] [] ? sock_has_perm+0x1c2/0x3e0 [ 54.424352] [] ? tcp_sendpage+0x1830/0x1830 [ 54.430325] [] ? inet_sendmsg+0x201/0x4c0 [ 54.436118] [] inet_sendmsg+0x2bc/0x4c0 [ 54.441738] [] ? inet_sendmsg+0x73/0x4c0 [ 54.447437] [] ? inet_recvmsg+0x4c0/0x4c0 [ 54.453225] [] sock_sendmsg+0xca/0x110 [ 54.458758] [] ___sys_sendmsg+0x6c1/0x7c0 [ 54.464556] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 54.471564] [] ? copy_msghdr_from_user+0x550/0x550 [ 54.478139] [] ? __fget+0x232/0x3b0 [ 54.483405] [] ? __fget+0x47/0x3b0 [ 54.488585] [] ? __fget_light+0xa1/0x1e0 [ 54.494290] [] ? __fdget+0x18/0x20 [ 54.499466] [] ? sockfd_lookup_light+0x118/0x160 [ 54.505845] [] __sys_sendmsg+0xd3/0x190 [ 54.511439] [] ? SyS_shutdown+0x1b0/0x1b0 [ 54.517209] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 54.523324] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 54.529886] [] compat_SyS_sendmsg+0x2a/0x40 [ 54.535829] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 54.542378] [] do_fast_syscall_32+0x314/0x890 [ 54.548495] [] sysenter_flags_fixed+0xd/0x17 [ 55.496331] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor3/5917 [ 55.504816] caller is __this_cpu_preempt_check+0x1c/0x20 [ 55.510530] CPU: 1 PID: 5917 Comm: syz-executor3 Not tainted 4.4.114-g4e74e98 #5 [ 55.518048] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.527384] 0000000000000000 72c619dd6c7d6286 ffff8801c9797648 ffffffff81d03d2d [ 55.535420] 0000000000000001 ffffffff839fe3a0 ffffffff83cef720 ffff8801ca9a8000 [ 55.543438] 0000000000000003 ffff8801c9797688 ffffffff81d63c74 ffffffff810002b8 [ 55.551455] Call Trace: [ 55.554028] [] dump_stack+0xc1/0x124 [ 55.559376] [] check_preemption_disabled+0x1d4/0x200 [ 55.566107] [] ? 0xffffffff810002b8 [ 55.571368] [] __this_cpu_preempt_check+0x1c/0x20 [ 55.577842] [] tcp_try_coalesce+0x249/0x4d0 [ 55.583797] [] ? tcp_parse_options+0x970/0x970 [ 55.590015] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 55.597094] [] tcp_queue_rcv+0x127/0x720 [ 55.602796] [] tcp_send_rcvq+0x39b/0x450 [ 55.608508] [] ? tcp_rcv_established+0x2230/0x2230 [ 55.615086] [] ? do_softirq.part.17+0x40/0x60 [ 55.619308] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor4/5905 [ 55.619319] caller is __this_cpu_preempt_check+0x1c/0x20 [ 55.635019] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 55.641839] [] ? lock_sock_nested+0x90/0x120 [ 55.647962] [] ? trace_hardirqs_on+0xd/0x10 [ 55.653914] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 55.660213] [] tcp_sendmsg+0x1e8f/0x2b10 [ 55.665906] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 55.672897] [] ? sock_has_perm+0x1c2/0x3e0 [ 55.678788] [] ? tcp_sendpage+0x1830/0x1830 [ 55.684740] [] ? inet_sendmsg+0x201/0x4c0 [ 55.690516] [] inet_sendmsg+0x2bc/0x4c0 [ 55.696120] [] ? inet_sendmsg+0x73/0x4c0 [ 55.701810] [] ? inet_recvmsg+0x4c0/0x4c0 [ 55.707590] [] sock_sendmsg+0xca/0x110 [ 55.713110] [] ___sys_sendmsg+0x6c1/0x7c0 [ 55.718886] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 55.725882] [] ? copy_msghdr_from_user+0x550/0x550 [ 55.732444] [] ? __fget+0x232/0x3b0 [ 55.737703] [] ? __fget+0x47/0x3b0 [ 55.742872] [] ? __fget_light+0xa1/0x1e0 [ 55.748563] [] ? __fdget+0x18/0x20 [ 55.753732] [] ? sockfd_lookup_light+0x118/0x160 [ 55.760120] [] __sys_sendmsg+0xd3/0x190 [ 55.765727] [] ? SyS_shutdown+0x1b0/0x1b0 [ 55.771504] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 55.777630] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 55.784190] [] compat_SyS_sendmsg+0x2a/0x40 [ 55.790142] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 55.796703] [] do_fast_syscall_32+0x314/0x890 [ 55.802827] [] sysenter_flags_fixed+0xd/0x17 [ 55.808864] CPU: 0 PID: 5905 Comm: syz-executor4 Not tainted 4.4.114-g4e74e98 #5 [ 55.816403] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.825748] 0000000000000000 7e63bef5d8affcaf ffff8800b4e0f648 ffffffff81d03d2d [ 55.833817] 0000000000000000 ffffffff839fe3a0 ffffffff83cef720 ffff8800aea88000 [ 55.841842] 0000000000000003 ffff8800b4e0f688 ffffffff81d63c74 ffffffff810002b8 [ 55.849858] Call Trace: [ 55.852432] [] dump_stack+0xc1/0x124 [ 55.857796] [] check_preemption_disabled+0x1d4/0x200 [ 55.864544] [] ? 0xffffffff810002b8 [ 55.869825] [] __this_cpu_preempt_check+0x1c/0x20 [ 55.876321] [] tcp_try_coalesce+0x249/0x4d0 [ 55.882290] [] ? tcp_parse_options+0x970/0x970 [ 55.888543] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 55.895642] [] tcp_queue_rcv+0x127/0x720 [ 55.901355] [] tcp_send_rcvq+0x39b/0x450 [ 55.907061] [] ? tcp_rcv_established+0x2230/0x2230 [ 55.913641] [] ? do_softirq.part.17+0x40/0x60 [ 55.919785] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 55.926624] [] ? lock_sock_nested+0x90/0x120 [ 55.932678] [] ? trace_hardirqs_on+0xd/0x10 [ 55.938647] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 55.944961] [] tcp_sendmsg+0x1e8f/0x2b10 [ 55.950671] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 55.957687] [] ? sock_has_perm+0x1c2/0x3e0 [ 55.963568] [] ? tcp_sendpage+0x1830/0x1830 [ 55.969544] [] ? inet_sendmsg+0x201/0x4c0 [ 55.975344] [] inet_sendmsg+0x2bc/0x4c0 [ 55.980970] [] ? inet_sendmsg+0x73/0x4c0 [ 55.986681] [] ? inet_recvmsg+0x4c0/0x4c0 [ 55.992475] [] sock_sendmsg+0xca/0x110 [ 55.998008] [] ___sys_sendmsg+0x6c1/0x7c0 [ 56.003802] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 56.010809] [] ? copy_msghdr_from_user+0x550/0x550 [ 56.017383] [] ? __fget+0x232/0x3b0 [ 56.022657] [] ? __fget+0x47/0x3b0 [ 56.027844] [] ? __fget_light+0xa1/0x1e0 [ 56.033554] [] ? __fdget+0x18/0x20 [ 56.038754] [] ? sockfd_lookup_light+0x118/0x160 [ 56.045151] [] __sys_sendmsg+0xd3/0x190 [ 56.050762] [] ? SyS_shutdown+0x1b0/0x1b0 [ 56.056548] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 56.062681] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 56.069232] [] compat_SyS_sendmsg+0x2a/0x40 [ 56.075182] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 56.081737] [] do_fast_syscall_32+0x314/0x890 [ 56.087856] [] sysenter_flags_fixed+0xd/0x17 [ 57.336694] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor3/6327 [ 57.345151] caller is __this_cpu_preempt_check+0x1c/0x20 [ 57.350645] CPU: 0 PID: 6327 Comm: syz-executor3 Not tainted 4.4.114-g4e74e98 #5 [ 57.358181] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.367534] 0000000000000000 7d48dde5326742e4 ffff8801d95cf648 ffffffff81d03d2d [ 57.375607] 0000000000000000 ffffffff839fe3a0 ffffffff83cef720 ffff8800babc1800 [ 57.383625] 0000000000000003 ffff8801d95cf688 ffffffff81d63c74 ffffffff810002b8 [ 57.391661] Call Trace: [ 57.394237] [] dump_stack+0xc1/0x124 [ 57.399593] [] check_preemption_disabled+0x1d4/0x200 [ 57.406336] [] ? 0xffffffff810002b8 [ 57.411603] [] __this_cpu_preempt_check+0x1c/0x20 [ 57.418093] [] tcp_try_coalesce+0x249/0x4d0 [ 57.424073] [] ? tcp_parse_options+0x970/0x970 [ 57.430314] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 57.437421] [] tcp_queue_rcv+0x127/0x720 [ 57.443128] [] tcp_send_rcvq+0x39b/0x450 [ 57.448834] [] ? tcp_rcv_established+0x2230/0x2230 [ 57.455410] [] ? do_softirq.part.17+0x40/0x60 [ 57.461555] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 57.468394] [] ? lock_sock_nested+0x90/0x120 [ 57.474461] [] ? trace_hardirqs_on+0xd/0x10 [ 57.480433] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 57.486752] [] tcp_sendmsg+0x1e8f/0x2b10 [ 57.492464] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 57.499487] [] ? sock_has_perm+0x1c2/0x3e0 [ 57.505368] [] ? tcp_sendpage+0x1830/0x1830 [ 57.511335] [] ? inet_sendmsg+0x201/0x4c0 [ 57.517130] [] inet_sendmsg+0x2bc/0x4c0 [ 57.522766] [] ? inet_sendmsg+0x73/0x4c0 [ 57.528478] [] ? inet_recvmsg+0x4c0/0x4c0 [ 57.534272] [] sock_sendmsg+0xca/0x110 [ 57.539805] [] ___sys_sendmsg+0x6c1/0x7c0 [ 57.545604] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 57.552629] [] ? copy_msghdr_from_user+0x550/0x550 [ 57.559212] [] ? __fget+0x232/0x3b0 [ 57.564480] [] ? __fget+0x47/0x3b0 [ 57.569668] [] ? __fget_light+0xa1/0x1e0 [ 57.575380] [] ? __fdget+0x18/0x20 [ 57.580567] [] ? sockfd_lookup_light+0x118/0x160 [ 57.586969] [] __sys_sendmsg+0xd3/0x190 [ 57.592601] [] ? SyS_shutdown+0x1b0/0x1b0 [ 57.598411] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 57.604567] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 57.611151] [] compat_SyS_sendmsg+0x2a/0x40 [ 57.617120] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 57.623697] [] do_fast_syscall_32+0x314/0x890 [ 57.629839] [] sysenter_flags_fixed+0xd/0x17 [ 58.449202] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor1/6621 [ 58.457727] caller is __this_cpu_preempt_check+0x1c/0x20 [ 58.463175] CPU: 1 PID: 6621 Comm: syz-executor1 Not tainted 4.4.114-g4e74e98 #5 [ 58.470694] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.480037] 0000000000000000 18e4cba98f38df18 ffff8801d8c9f648 ffffffff81d03d2d [ 58.488088] 0000000000000001 ffffffff839fe3a0 ffffffff83cef720 ffff8801d938e000 [ 58.496119] 0000000000000003 ffff8801d8c9f688 ffffffff81d63c74 ffffffff810002b8 [ 58.504133] Call Trace: [ 58.506711] [] dump_stack+0xc1/0x124 [ 58.512068] [] check_preemption_disabled+0x1d4/0x200 [ 58.518813] [] ? 0xffffffff810002b8 [ 58.524083] [] __this_cpu_preempt_check+0x1c/0x20 [ 58.530569] [] tcp_try_coalesce+0x249/0x4d0 [ 58.536542] [] ? tcp_parse_options+0x970/0x970 [ 58.542780] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 58.549881] [] tcp_queue_rcv+0x127/0x720 [ 58.555586] [] tcp_send_rcvq+0x39b/0x450 [ 58.561282] [] ? tcp_rcv_established+0x2230/0x2230 [ 58.567849] [] ? do_softirq.part.17+0x40/0x60 [ 58.573989] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 58.580819] [] ? lock_sock_nested+0x90/0x120 [ 58.586875] [] ? trace_hardirqs_on+0xd/0x10 [ 58.592836] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 58.599153] [] tcp_sendmsg+0x1e8f/0x2b10 [ 58.604866] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 58.611869] [] ? sock_has_perm+0x1c2/0x3e0 [ 58.617742] [] ? tcp_sendpage+0x1830/0x1830 [ 58.623702] [] ? inet_sendmsg+0x201/0x4c0 [ 58.629491] [] inet_sendmsg+0x2bc/0x4c0 [ 58.635106] [] ? inet_sendmsg+0x73/0x4c0 [ 58.640806] [] ? inet_recvmsg+0x4c0/0x4c0 [ 58.646594] [] sock_sendmsg+0xca/0x110 [ 58.652119] [] ___sys_sendmsg+0x6c1/0x7c0 [ 58.657908] [] ? copy_msghdr_from_user+0x550/0x550 [ 58.664479] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 58.671484] [] ? __fget+0x232/0x3b0 [ 58.676746] [] ? __fget+0x47/0x3b0 [ 58.681929] [] ? __fget_light+0xa1/0x1e0 [ 58.687628] [] ? __fdget+0x18/0x20 [ 58.692808] [] ? sockfd_lookup_light+0x118/0x160 [ 58.699198] [] __sys_sendmsg+0xd3/0x190 [ 58.704809] [] ? SyS_shutdown+0x1b0/0x1b0 [ 58.710600] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 58.716724] [] ? fd_install+0x4d/0x60 [ 58.722145] [] ? move_addr_to_kernel+0x50/0x50 [ 58.728354] [] compat_SyS_sendmsg+0x2a/0x40 [ 58.734305] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 58.740864] [] do_fast_syscall_32+0x314/0x890 [ 58.746984] [] sysenter_flags_fixed+0xd/0x17 2018/02/03 14:46:27 executed programs: 573 [ 59.567743] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor4/6923 [ 59.576501] caller is __this_cpu_preempt_check+0x1c/0x20 [ 59.581950] CPU: 0 PID: 6923 Comm: syz-executor4 Not tainted 4.4.114-g4e74e98 #5 [ 59.589475] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.598819] 0000000000000000 8592a7c66c3fff22 ffff8800bbaef648 ffffffff81d03d2d [ 59.606857] 0000000000000000 ffffffff839fe3a0 ffffffff83cef720 ffff8800bb1bb000 [ 59.614877] 0000000000000003 ffff8800bbaef688 ffffffff81d63c74 ffffffff810002b8 [ 59.622913] Call Trace: [ 59.625494] [] dump_stack+0xc1/0x124 [ 59.630848] [] check_preemption_disabled+0x1d4/0x200 [ 59.637589] [] ? 0xffffffff810002b8 [ 59.642860] [] __this_cpu_preempt_check+0x1c/0x20 [ 59.649345] [] tcp_try_coalesce+0x249/0x4d0 [ 59.655318] [] ? tcp_parse_options+0x970/0x970 [ 59.661557] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 59.668652] [] tcp_queue_rcv+0x127/0x720 [ 59.674360] [] tcp_send_rcvq+0x39b/0x450 [ 59.680070] [] ? tcp_rcv_established+0x2230/0x2230 [ 59.686650] [] ? do_softirq.part.17+0x40/0x60 [ 59.692791] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 59.699610] [] ? lock_sock_nested+0x90/0x120 [ 59.705642] [] ? trace_hardirqs_on+0xd/0x10 [ 59.711584] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 59.717877] [] tcp_sendmsg+0x1e8f/0x2b10 [ 59.723559] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 59.730548] [] ? sock_has_perm+0x1c2/0x3e0 [ 59.736403] [] ? tcp_sendpage+0x1830/0x1830 [ 59.742349] [] ? inet_sendmsg+0x201/0x4c0 [ 59.748118] [] inet_sendmsg+0x2bc/0x4c0 [ 59.753716] [] ? inet_sendmsg+0x73/0x4c0 [ 59.759398] [] ? inet_recvmsg+0x4c0/0x4c0 [ 59.765170] [] sock_sendmsg+0xca/0x110 [ 59.770683] [] ___sys_sendmsg+0x6c1/0x7c0 [ 59.776456] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 59.783439] [] ? copy_msghdr_from_user+0x550/0x550 [ 59.789991] [] ? __fget+0x232/0x3b0 [ 59.795242] [] ? __fget+0x47/0x3b0 [ 59.800404] [] ? __fget_light+0xa1/0x1e0 [ 59.806089] [] ? __fdget+0x18/0x20 [ 59.811258] [] ? sockfd_lookup_light+0x118/0x160 [ 59.817636] [] __sys_sendmsg+0xd3/0x190 [ 59.823233] [] ? SyS_shutdown+0x1b0/0x1b0 [ 59.829007] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 59.835128] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 59.841680] [] compat_SyS_sendmsg+0x2a/0x40 [ 59.847625] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 59.854178] [] do_fast_syscall_32+0x314/0x890 [ 59.860303] [] sysenter_flags_fixed+0xd/0x17 [ 60.230587] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor4/6989 [ 60.239332] caller is __this_cpu_preempt_check+0x1c/0x20 [ 60.244782] CPU: 1 PID: 6989 Comm: syz-executor4 Not tainted 4.4.114-g4e74e98 #5 [ 60.252303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.261644] 0000000000000000 6b638d79da15a063 ffff8800bb8f7648 ffffffff81d03d2d [ 60.269719] 0000000000000001 ffffffff839fe3a0 ffffffff83cef720 ffff8801d8880000 [ 60.277775] 0000000000000003 ffff8800bb8f7688 ffffffff81d63c74 ffffffff810002b8 [ 60.285834] Call Trace: [ 60.288416] [] dump_stack+0xc1/0x124 [ 60.293775] [] check_preemption_disabled+0x1d4/0x200 [ 60.300518] [] ? 0xffffffff810002b8 [ 60.305790] [] __this_cpu_preempt_check+0x1c/0x20 [ 60.312275] [] tcp_try_coalesce+0x249/0x4d0 [ 60.318238] [] ? tcp_parse_options+0x970/0x970 [ 60.324470] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 60.331562] [] tcp_queue_rcv+0x127/0x720 [ 60.337265] [] tcp_send_rcvq+0x39b/0x450 [ 60.342968] [] ? tcp_rcv_established+0x2230/0x2230 [ 60.349546] [] ? do_softirq.part.17+0x40/0x60 [ 60.355700] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 60.362547] [] ? lock_sock_nested+0x90/0x120 [ 60.368599] [] ? trace_hardirqs_on+0xd/0x10 [ 60.374570] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 60.380885] [] tcp_sendmsg+0x1e8f/0x2b10 [ 60.386589] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 60.393597] [] ? sock_has_perm+0x1c2/0x3e0 [ 60.399476] [] ? tcp_sendpage+0x1830/0x1830 [ 60.405443] [] ? inet_sendmsg+0x201/0x4c0 [ 60.411239] [] inet_sendmsg+0x2bc/0x4c0 [ 60.416853] [] ? inet_sendmsg+0x73/0x4c0 [ 60.422555] [] ? inet_recvmsg+0x4c0/0x4c0 [ 60.428349] [] sock_sendmsg+0xca/0x110 [ 60.433879] [] ___sys_sendmsg+0x6c1/0x7c0 [ 60.439672] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 60.446686] [] ? copy_msghdr_from_user+0x550/0x550 [ 60.453264] [] ? __fget+0x232/0x3b0 [ 60.458529] [] ? __fget+0x47/0x3b0 [ 60.463692] [] ? __fget_light+0xa1/0x1e0 [ 60.469379] [] ? __fdget+0x18/0x20 [ 60.474542] [] ? sockfd_lookup_light+0x118/0x160 [ 60.480928] [] __sys_sendmsg+0xd3/0x190 [ 60.486523] [] ? SyS_shutdown+0x1b0/0x1b0 [ 60.492303] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 60.498517] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 60.505067] [] compat_SyS_sendmsg+0x2a/0x40 [ 60.511009] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 60.517558] [] do_fast_syscall_32+0x314/0x890 [ 60.523676] [] sysenter_flags_fixed+0xd/0x17 [ 61.003664] BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor5/7195 [ 61.012202] caller is __this_cpu_preempt_check+0x1c/0x20 [ 61.017955] CPU: 1 PID: 7195 Comm: syz-executor5 Not tainted 4.4.114-g4e74e98 #5 [ 61.025493] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.034839] 0000000000000000 3038fd41c04f36b0 ffff8800adf47648 ffffffff81d03d2d [ 61.042876] 0000000000000001 ffffffff839fe3a0 ffffffff83cef720 ffff8801d8c2b000 [ 61.050921] 0000000000000003 ffff8800adf47688 ffffffff81d63c74 ffffffff810002b8 [ 61.058964] Call Trace: [ 61.061541] [] dump_stack+0xc1/0x124 [ 61.066894] [] check_preemption_disabled+0x1d4/0x200 [ 61.073634] [] ? 0xffffffff810002b8 [ 61.078913] [] __this_cpu_preempt_check+0x1c/0x20 [ 61.085406] [] tcp_try_coalesce+0x249/0x4d0 [ 61.091376] [] ? tcp_parse_options+0x970/0x970 [ 61.097598] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 61.104688] [] tcp_queue_rcv+0x127/0x720 [ 61.110392] [] tcp_send_rcvq+0x39b/0x450 [ 61.116107] [] ? tcp_rcv_established+0x2230/0x2230 [ 61.122673] [] ? do_softirq.part.17+0x40/0x60 [ 61.128809] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 61.135644] [] ? lock_sock_nested+0x90/0x120 [ 61.141689] [] ? trace_hardirqs_on+0xd/0x10 [ 61.147651] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 61.153961] [] tcp_sendmsg+0x1e8f/0x2b10 [ 61.159667] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 61.166676] [] ? sock_has_perm+0x1c2/0x3e0 [ 61.172562] [] ? tcp_sendpage+0x1830/0x1830 [ 61.178525] [] ? inet_sendmsg+0x201/0x4c0 [ 61.184312] [] inet_sendmsg+0x2bc/0x4c0 [ 61.189928] [] ? inet_sendmsg+0x73/0x4c0 [ 61.195643] [] ? inet_recvmsg+0x4c0/0x4c0 [ 61.201428] [] sock_sendmsg+0xca/0x110 [ 61.206953] [] ___sys_sendmsg+0x6c1/0x7c0 [ 61.212737] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 61.219738] [] ? copy_msghdr_from_user+0x550/0x550 [ 61.226307] [] ? __fget+0x232/0x3b0 [ 61.231574] [] ? __fget+0x47/0x3b0 [ 61.236755] [] ? __fget_light+0xa1/0x1e0 [ 61.242457] [] ? __fdget+0x18/0x20 [ 61.247641] [] ? sockfd_lookup_light+0x118/0x160 [ 61.254038] [] __sys_sendmsg+0xd3/0x190 [ 61.259658] [] ? SyS_shutdown+0x1b0/0x1b0 [ 61.265448] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 61.271579] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 61.278149] [] compat_SyS_sendmsg+0x2a/0x40 [ 61.284112] [] ? compat_SyS_getsockopt+0x2a0/0x2a0 [ 61.290674] [] do_fast_syscall_32+0x314/0x890 [ 61.296792] [