[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 9.366364] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.739676] random: sshd: uninitialized urandom read (32 bytes read) [ 23.775620] random: crng init done Warning: Permanently added '10.128.0.9' (ECDSA) to the list of known hosts. executing program [ 30.616511] kasan: CONFIG_KASAN_INLINE enabled [ 30.621197] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.628571] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.634778] Modules linked in: [ 30.638066] CPU: 0 PID: 2055 Comm: syz-executor117 Not tainted 4.9.141+ #1 [ 30.645046] task: ffff8801d25fc740 task.stack: ffff8801ce218000 [ 30.651191] RIP: 0010:[] [] tcp_sendpage+0x35d/0x1910 [ 30.659694] RSP: 0018:ffff8801ce21f930 EFLAGS: 00010206 [ 30.665121] RAX: 000000000000000f RBX: 0000000000000000 RCX: 1ffff1003a11743b [ 30.672361] RDX: 0000000000000000 RSI: ffffffff824e0eab RDI: 0000000000000078 [ 30.679727] RBP: ffff8801ce21fa98 R08: ffff8801d25fcff0 R09: 0000000000000000 [ 30.686975] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000fd58 [ 30.694339] R13: ffff8801c4883300 R14: ffff8801d08b9f80 R15: dffffc0000000000 [ 30.701579] FS: 00007f1ba5be2700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 30.709776] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.715801] CR2: 0000000020020000 CR3: 00000001cefde000 CR4: 00000000001606b0 [ 30.723047] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.730293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.737538] Stack: [ 30.739663] ffff8801ce21f940 ffffffff81243c87 0000000000000246 ffff8801d25fc740 [ 30.747778] ffffffff830cc2e0 fffffbfff067d37c 0000000000000000 ffff8801d25fcff0 [ 30.756011] ffffed003a4bf9fd 0000000000000000 ffff8801d08ba368 ffff8801ce21f9f0 [ 30.764003] Call Trace: [ 30.766560] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 30.773281] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 30.779780] [] ? check_preemption_disabled+0x3b/0x200 [ 30.786588] [] ? inet_sendpage+0x14b/0x510 [ 30.792447] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 30.798824] [] inet_sendpage+0x221/0x510 [ 30.804593] [] ? inet_sendpage+0x7b/0x510 [ 30.810376] [] kernel_sendpage+0x93/0xf0 [ 30.816062] [] ? inet_getname+0x3b0/0x3b0 [ 30.821835] [] sock_sendpage+0x8c/0xc0 [ 30.827488] [] ? kernel_sendpage+0xf0/0xf0 [ 30.833343] [] pipe_to_sendpage+0x266/0x330 [ 30.839285] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 30.845919] [] ? splice_from_pipe_next.part.2+0x226/0x2e0 [ 30.853075] [] __splice_from_pipe+0x316/0x710 [ 30.859361] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 30.866132] [] splice_from_pipe+0xf9/0x170 [ 30.871989] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 30.878631] [] ? splice_shrink_spd+0xb0/0xb0 [ 30.884666] [] ? security_file_permission+0x8f/0x1e0 [ 30.891540] [] generic_splice_sendpage+0x3c/0x50 [ 30.897914] [] ? splice_from_pipe+0x170/0x170 [ 30.904265] [] SyS_splice+0xe4d/0x14d0 [ 30.909778] [] ? check_preemption_disabled+0x3b/0x200 [ 30.916586] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 30.923315] [] ? compat_SyS_vmsplice+0x160/0x160 [ 30.929688] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.936495] [] ? do_syscall_64+0x48/0x550 [ 30.942265] [] ? compat_SyS_vmsplice+0x160/0x160 [ 30.948641] [] do_syscall_64+0x19f/0x550 [ 30.954329] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 30.961235] Code: ff ff 48 0f 44 d8 e8 c3 ab e3 fe 4d 85 e4 0f 84 f0 04 00 00 e8 b5 ab e3 fe 48 8d 7b 78 44 8b a5 58 ff ff ff 48 89 f8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 74 08 3c 03 0f 8e 06 11 00 00 44 2b 63 78 [ 30.988217] RIP [] tcp_sendpage+0x35d/0x1910 [ 30.994361] RSP [ 30.998931] ---[ end trace dc7f7c3915174056 ]--- [ 31.003734] Kernel panic - not syncing: Fatal exception [ 31.009542] Kernel Offset: disabled [ 31.013147] Rebooting in 86400 seconds..