[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 11.765490] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 12.876840] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.79' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.051565] kasan: CONFIG_KASAN_INLINE enabled [ 33.052794] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.054078] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.054997] Modules linked in: [ 33.055548] CPU: 0 PID: 2056 Comm: syz-executor411 Not tainted 4.9.145+ #81 [ 33.056792] task: ffff8801cfdd5f00 task.stack: ffff8801cec50000 [ 33.057698] RIP: 0010:[] [] tcp_sendpage+0x35d/0x1910 [ 33.059030] RSP: 0018:ffff8801cec57930 EFLAGS: 00010206 [ 33.059863] RAX: 000000000000000f RBX: 0000000000000000 RCX: 1ffff1003976a19b [ 33.060897] RDX: 0000000000000000 RSI: ffffffff824e2e2b RDI: 0000000000000078 [ 33.062045] RBP: ffff8801cec57a98 R08: ffff8801cfdd67b0 R09: 0000000000000000 [ 33.063332] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000fd58 [ 33.064768] R13: ffff8801cc880880 R14: ffff8801cbb50a80 R15: dffffc0000000000 [ 33.065928] FS: 00007f970023b700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 33.067154] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.068282] CR2: 0000000020020000 CR3: 00000001ceeed000 CR4: 00000000001606b0 [ 33.069406] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.070512] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.071583] Stack: [ 33.073463] ffff8801cec57940 ffffffff81243de7 0000000000000246 ffff8801cfdd5f00 [ 33.081514] ffffffff830d03e0 fffffbfff067de68 0000000000000000 ffff8801cfdd67b0 [ 33.089607] ffffed0039fbacf5 0000000000000000 ffff8801cbb50e68 ffff8801cec579f0 [ 33.097622] Call Trace: [ 33.100195] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 33.106950] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 33.113347] [] ? check_preemption_disabled+0x3b/0x200 [ 33.120176] [] ? inet_sendpage+0x14b/0x510 [ 33.126055] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 33.132479] [] inet_sendpage+0x221/0x510 [ 33.138401] [] ? inet_sendpage+0x7b/0x510 [ 33.144203] [] kernel_sendpage+0x93/0xf0 [ 33.149914] [] ? inet_getname+0x3b0/0x3b0 [ 33.155720] [] sock_sendpage+0x8c/0xc0 [ 33.161250] [] ? kernel_sendpage+0xf0/0xf0 [ 33.167251] [] pipe_to_sendpage+0x266/0x330 [ 33.173209] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 33.179861] [] ? splice_from_pipe_next.part.2+0x226/0x2e0 [ 33.187050] [] __splice_from_pipe+0x316/0x710 [ 33.193183] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 33.200034] [] splice_from_pipe+0xf9/0x170 [ 33.206009] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 33.212665] [] ? splice_shrink_spd+0xb0/0xb0 [ 33.218717] [] ? security_file_permission+0x8f/0x1e0 [ 33.225464] [] generic_splice_sendpage+0x3c/0x50 [ 33.231958] [] ? splice_from_pipe+0x170/0x170 [ 33.238095] [] SyS_splice+0xe4d/0x14d0 [ 33.243630] [] ? check_preemption_disabled+0x3b/0x200 [ 33.250460] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 33.257202] [] ? compat_SyS_vmsplice+0x160/0x160 [ 33.263696] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 33.270526] [] ? do_syscall_64+0x48/0x550 [ 33.276315] [] ? compat_SyS_vmsplice+0x160/0x160 [ 33.282716] [] do_syscall_64+0x19f/0x550 [ 33.288538] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 33.295442] Code: ff ff 48 0f 44 d8 e8 a3 8d e3 fe 4d 85 e4 0f 84 f0 04 00 00 e8 95 8d 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 [ 33.322566] RIP [] tcp_sendpage+0x35d/0x1910 [ 33.328871] RSP [ 33.332557] ---[ end trace 00fcb2ab2bbc0809 ]--- [ 33.337313] Kernel panic - not syncing: Fatal exception [ 33.343110] Kernel Offset: disabled [ 33.346728] Rebooting in 86400 seconds..