[ 22.589975] random: sshd: uninitialized urandom read (32 bytes read, 37 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[ 22.793909] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 23.120156] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.087852] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) [ 31.657063] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available) Warning: Permanently added '10.128.15.197' (ECDSA) to the list of known hosts. [ 37.063097] random: sshd: uninitialized urandom read (32 bytes read, 124 bits of entropy available) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.566539] BUG: using __this_cpu_add() in preemptible [00000000] code: syzkaller369659/4013 [ 37.575193] caller is __this_cpu_preempt_check+0x1c/0x20 [ 37.580634] CPU: 0 PID: 4013 Comm: syzkaller369659 Not tainted 4.4.114-gfe09418 #3 [ 37.588313] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.597638] 0000000000000000 fdbeb5a8cd798a41 ffff8800b916f6c8 ffffffff81d02e6d [ 37.605610] 0000000000000000 ffffffff839fe3a0 ffffffff83cef720 ffff8801c933c740 [ 37.613615] 0000000000000003 ffff8800b916f708 ffffffff81d62db4 ffffffff810002b8 [ 37.621618] Call Trace: [ 37.624191] [] dump_stack+0xc1/0x124 [ 37.629527] [] check_preemption_disabled+0x1d4/0x200 [ 37.636247] [] ? 0xffffffff810002b8 [ 37.641492] [] __this_cpu_preempt_check+0x1c/0x20 [ 37.647956] [] tcp_try_coalesce+0x249/0x4d0 [ 37.653896] [] ? tcp_parse_options+0x970/0x970 [ 37.660189] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 37.667262] [] tcp_queue_rcv+0x127/0x720 [ 37.672954] [] tcp_send_rcvq+0x39b/0x450 [ 37.678648] [] ? tcp_rcv_established+0x2230/0x2230 [ 37.685202] [] ? do_softirq.part.17+0x40/0x60 [ 37.691318] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 37.698129] [] ? lock_sock_nested+0x90/0x120 [ 37.704160] [] ? trace_hardirqs_on+0xd/0x10 [ 37.710117] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 37.716409] [] tcp_sendmsg+0x1e8f/0x2b10 [ 37.722100] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 37.729087] [] ? sock_has_perm+0x1c2/0x3e0 [ 37.734943] [] ? tcp_sendpage+0x1830/0x1830 [ 37.740885] [] ? inet_sendmsg+0x201/0x4c0 [ 37.746654] [] inet_sendmsg+0x2bc/0x4c0 [ 37.752249] [] ? inet_sendmsg+0x73/0x4c0 [ 37.757948] [] ? inet_recvmsg+0x4c0/0x4c0 [ 37.763719] [] sock_sendmsg+0xca/0x110 [ 37.769230] [] ___sys_sendmsg+0x6c1/0x7c0 [ 37.774999] [] ? copy_msghdr_from_user+0x550/0x550 [ 37.781549] [] ? __fget+0x232/0x3b0 [ 37.786795] [] ? __fget+0x47/0x3b0 [ 37.791966] [] ? __fget_light+0xa1/0x1e0 [ 37.797649] [] ? __fdget+0x18/0x20 [ 37.802820] [] __sys_sendmsg+0xd3/0x190 [ 37.808413] [] ? SyS_shutdown+0x1b0/0x1b0 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.814196] [] ? __do_page_fault+0x380/0xa00 [ 37.820243] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 37.827053] [] SyS_sendmsg+0x2d/0x50 [ 37.832400] [] entry_SYSCALL_64_fastpath+0x1c/0x98 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.930147] BUG: using __this_cpu_add() in preemptible [00000000] code: syzkaller369659/4014 [ 37.938835] caller is __this_cpu_preempt_check+0x1c/0x20 [ 37.944296] CPU: 0 PID: 4014 Comm: syzkaller369659 Not tainted 4.4.114-gfe09418 #3 [ 37.951977] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.961303] 0000000000000000 afb35d5c38728b9e ffff8801d05676c8 ffffffff81d02e6d [ 37.969279] 0000000000000000 ffffffff839fe3a0 ffffffff83cef720 ffff8801c933df00 [ 37.977250] 0000000000000003 ffff8801d0567708[ 37.980608] BUG: using __this_cpu_add() in preemptible [00000000] code: syzkaller369659/4019 [ 37.980616] caller is __this_cpu_preempt_check+0x1c/0x20 [ 37.995705] ffffffff81d62db4 ffffffff810002b8 [ 38.000779] Call Trace: [ 38.003341] [] dump_stack+0xc1/0x124 [ 38.008676] [] check_preemption_disabled+0x1d4/0x200 [ 38.015401] [] ? 0xffffffff810002b8 [ 38.020647] [] __this_cpu_preempt_check+0x1c/0x20 [ 38.027113] [] tcp_try_coalesce+0x249/0x4d0 [ 38.033054] [] ? tcp_parse_options+0x970/0x970 [ 38.039259] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 38.047439] [] tcp_queue_rcv+0x127/0x720 [ 38.053123] [] tcp_send_rcvq+0x39b/0x450 [ 38.058805] [] ? tcp_rcv_established+0x2230/0x2230 [ 38.065362] [] ? do_softirq.part.17+0x40/0x60 [ 38.071477] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 38.078289] [] ? lock_sock_nested+0x90/0x120 [ 38.084318] [] ? trace_hardirqs_on+0xd/0x10 [ 38.090275] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 38.096583] [] tcp_sendmsg+0x1e8f/0x2b10 [ 38.102270] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 38.109256] [] ? sock_has_perm+0x1c2/0x3e0 [ 38.115112] [] ? tcp_sendpage+0x1830/0x1830 [ 38.121055] [] ? inet_sendmsg+0x201/0x4c0 [ 38.126826] [] inet_sendmsg+0x2bc/0x4c0 [ 38.132419] [] ? inet_sendmsg+0x73/0x4c0 [ 38.138101] [] ? inet_recvmsg+0x4c0/0x4c0 [ 38.143885] [] sock_sendmsg+0xca/0x110 [ 38.149395] [] ___sys_sendmsg+0x6c1/0x7c0 [ 38.155167] [] ? copy_msghdr_from_user+0x550/0x550 [ 38.161717] [] ? __fget+0x232/0x3b0 [ 38.166976] [] ? __fget+0x47/0x3b0 [ 38.172138] [] ? __fget_light+0xa1/0x1e0 [ 38.177822] [] ? __fdget+0x18/0x20 [ 38.182993] [] __sys_sendmsg+0xd3/0x190 [ 38.188599] [] ? SyS_shutdown+0x1b0/0x1b0 [ 38.194393] [] ? __do_page_fault+0x380/0xa00 [ 38.200426] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 38.207239] [] SyS_sendmsg+0x2d/0x50 [ 38.212588] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 38.219142] CPU: 1 PID: 4019 Comm: syzkaller369659 Not tainted 4.4.114-gfe09418 #3 [ 38.226860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.236191] 0000000000000000 0f7c9e6c268b7d5b ffff8801d749f6c8 ffffffff81d02e6d [ 38.244183] 0000000000000001 ffffffff839fe3a0 ffffffff83cef720 ffff8801cb69c740 [ 38.252147] 0000000000000003 ffff8801d749f708 ffffffff81d62db4 ffffffff810002b8 [ 38.260127] Call Trace: [ 38.262689] [] dump_stack+0xc1/0x124 [ 38.268025] [] check_preemption_disabled+0x1d4/0x200 [ 38.274748] [] ? 0xffffffff810002b8 [ 38.279996] [] __this_cpu_preempt_check+0x1c/0x20 [ 38.286469] [] tcp_try_coalesce+0x249/0x4d0 [ 38.292422] [] ? tcp_parse_options+0x970/0x970 [ 38.298887] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 38.305960] [] tcp_queue_rcv+0x127/0x720 [ 38.311640] [] tcp_send_rcvq+0x39b/0x450 [ 38.317319] [] ? tcp_rcv_established+0x2230/0x2230 [ 38.323867] [] ? do_softirq.part.17+0x40/0x60 [ 38.329983] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 38.336805] [] ? lock_sock_nested+0x90/0x120 [ 38.342833] [] ? trace_hardirqs_on+0xd/0x10 [ 38.348785] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 38.355078] [] tcp_sendmsg+0x1e8f/0x2b10 [ 38.360760] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 38.367746] [] ? sock_has_perm+0x1c2/0x3e0 [ 38.373600] [] ? tcp_sendpage+0x1830/0x1830 [ 38.379542] [] ? inet_sendmsg+0x201/0x4c0 [ 38.385313] [] inet_sendmsg+0x2bc/0x4c0 [ 38.390909] [] ? inet_sendmsg+0x73/0x4c0 [ 38.396587] [] ? inet_recvmsg+0x4c0/0x4c0 [ 38.402354] [] sock_sendmsg+0xca/0x110 [ 38.407860] [] ___sys_sendmsg+0x6c1/0x7c0 [ 38.413628] [] ? copy_msghdr_from_user+0x550/0x550 [ 38.420176] [] ? __fget+0x232/0x3b0 [ 38.425423] [] ? __fget+0x47/0x3b0 executing program executing program executing program executing program [ 38.430600] [] ? __fget_light+0xa1/0x1e0 [ 38.436280] [] ? __fdget+0x18/0x20 [ 38.441442] [] __sys_sendmsg+0xd3/0x190 [ 38.447035] [] ? SyS_shutdown+0x1b0/0x1b0 [ 38.452802] [] ? __do_page_fault+0x380/0xa00 [ 38.458830] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 38.465640] [] SyS_sendmsg+0x2d/0x50 [ 38.470974] [] entry_SYSCALL_64_fastpath+0x1c/0x98 executing program executing program executing program executing program [ 38.511566] BUG: using __this_cpu_add() in preemptible [00000000] code: syzkaller369659/4025 [ 38.520341] caller is __this_cpu_preempt_check+0x1c/0x20 [ 38.525956] CPU: 0 PID: 4025 Comm: syzkaller369659 Not tainted 4.4.114-gfe09418 #3 [ 38.533656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.542992] 0000000000000000 e7aa3687896fc4d9 ffff8800b55676c8 ffffffff81d02e6d [ 38.551024] 0000000000000000 ffffffff839fe3a0 ffffffff83cef720 ffff8800b900c740 executing program executing program executing program executing program [ 38.559015] 0000000000000003 ffff8800b5567708 ffffffff81d62db4 ffffffff810002b8 [ 38.566998] Call Trace: [ 38.569560] [] dump_stack+0xc1/0x124 [ 38.574900] [] check_preemption_disabled+0x1d4/0x200 [ 38.581627] [] ? 0xffffffff810002b8 [ 38.586880] [] __this_cpu_preempt_check+0x1c/0x20 [ 38.593352] [] tcp_try_coalesce+0x249/0x4d0 [ 38.599297] [] ? tcp_parse_options+0x970/0x970 executing program executing program executing program [ 38.605506] [] ? skb_copy_datagram_from_iter+0x38c/0x5a0 [ 38.612583] [] tcp_queue_rcv+0x127/0x720 [ 38.618273] [] tcp_send_rcvq+0x39b/0x450 [ 38.623958] [] ? tcp_rcv_established+0x2230/0x2230 [ 38.630514] [] ? do_softirq.part.17+0x40/0x60 [ 38.636636] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 38.643463] [] ? lock_sock_nested+0x90/0x120 [ 38.649500] [] ? trace_hardirqs_on+0xd/0x10 [ 38.655445] [] ? __local_bh_enable_ip+0x6a/0xd0 executing program executing program executing program executing program executing program [ 38.661751] [] tcp_sendmsg+0x1e8f/0x2b10 [ 38.667438] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 38.674434] [] ? sock_has_perm+0x1c2/0x3e0 [ 38.680302] [] ? tcp_sendpage+0x1830/0x1830 [ 38.686253] [] ? inet_sendmsg+0x201/0x4c0 [ 38.692026] [] inet_sendmsg+0x2bc/0x4c0 [ 38.697639] [] ? inet_sendmsg+0x73/0x4c0 [ 38.703328] [] ? inet_recvmsg+0x4c0/0x4c0 [ 38.709104] [] sock_sendmsg+0xca/0x110 [ 38.714621] [] ___sys_sendmsg+0x6c1/0x7c0 [ 38.720395] [] ? copy_msghdr_from_user+0x550/0x550 [ 38.726949] [] ? __fget+0x232/0x3b0 [ 38.732199] [] ? __fget+0x47/0x3b0 [ 38.737362] [] ? __fget_light+0xa1/0x1e0 [ 38.743046] [] ? __fdget+0x18/0x20 [ 38.748214] [] __sys_sendmsg+0xd3/0x190 [ 38.753812] [] ? SyS_shutdown+0x1b0/0x1b0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.759586] [] ? __do_page_fault+0x380/0xa00 [ 38.765619] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 38.772433] [] SyS_sendmsg+0x2d/0x50 [ 38.777775] [] entry_SYSCALL_64_fastpath+0x1c/0x98 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.439796] random: nonblocking pool is initialized