[....] 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[ 10.870366] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 11.337514] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.91' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 38.626022] kasan: CONFIG_KASAN_INLINE enabled [ 38.626834] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.627857] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.628731] Modules linked in: [ 38.629271] CPU: 1 PID: 2066 Comm: syz-executor476 Not tainted 4.9.145+ #81 [ 38.630220] task: ffff8801d18b5f00 task.stack: ffff8801cfc30000 [ 38.631048] RIP: 0010:[] [] tcp_sendpage+0x35d/0x1910 [ 38.632338] RSP: 0018:ffff8801cfc37930 EFLAGS: 00010206 [ 38.633061] RAX: 000000000000000f RBX: 0000000000000000 RCX: 1ffff1003a4432eb [ 38.634093] RDX: 0000000000000000 RSI: ffffffff824e2e2b RDI: 0000000000000078 [ 38.635091] RBP: ffff8801cfc37a98 R08: ffff8801d18b67b0 R09: 0000000000000000 [ 38.636171] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000fd58 [ 38.637302] R13: ffff8801c4071100 R14: ffff8801d2219500 R15: dffffc0000000000 [ 38.638263] FS: 00007f995ed48700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 [ 38.639436] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.640575] CR2: 00007f995ed05e78 CR3: 00000001d2a49000 CR4: 00000000001606b0 [ 38.641736] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.642708] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.643704] Stack: [ 38.644010] ffff8801cfc37940 ffffffff81243de7 0000000000000246 ffff8801d18b5f00 [ 38.645200] ffffffff830d03e0 fffffbfff067de68 0000000000000000 ffff8801d18b67b0 [ 38.648048] ffffed003a316cf5 0000000000000000 ffff8801d22198e8 ffff8801cfc379f0 [ 38.656038] Call Trace: [ 38.658709] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 38.665436] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 38.671814] [] ? check_preemption_disabled+0x3b/0x200 [ 38.678624] [] ? inet_sendpage+0x14b/0x510 [ 38.684488] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 38.690871] [] inet_sendpage+0x221/0x510 [ 38.696558] [] ? inet_sendpage+0x7b/0x510 [ 38.702335] [] kernel_sendpage+0x93/0xf0 [ 38.708017] [] ? inet_getname+0x3b0/0x3b0 [ 38.713787] [] sock_sendpage+0x8c/0xc0 [ 38.719296] [] ? kernel_sendpage+0xf0/0xf0 [ 38.725157] [] pipe_to_sendpage+0x266/0x330 [ 38.731122] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 38.737760] [] ? splice_from_pipe_next.part.2+0x226/0x2e0 [ 38.744916] [] __splice_from_pipe+0x316/0x710 [ 38.751041] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 38.757690] [] splice_from_pipe+0xf9/0x170 [ 38.763564] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 38.770210] [] ? splice_shrink_spd+0xb0/0xb0 [ 38.776248] [] ? security_file_permission+0x8f/0x1e0 [ 38.783011] [] generic_splice_sendpage+0x3c/0x50 [ 38.789396] [] ? splice_from_pipe+0x170/0x170 [ 38.795551] [] SyS_splice+0xe4d/0x14d0 [ 38.801074] [] ? check_preemption_disabled+0x3b/0x200 [ 38.807971] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 38.814711] [] ? compat_SyS_vmsplice+0x160/0x160 [ 38.821102] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 38.827929] [] ? do_syscall_64+0x48/0x550 [ 38.833710] [] ? compat_SyS_vmsplice+0x160/0x160 [ 38.840137] [] do_syscall_64+0x19f/0x550 [ 38.845837] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 38.852776] 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 [ 38.879790] RIP [] tcp_sendpage+0x35d/0x1910 [ 38.885949] RSP [ 38.889645] ---[ end trace 8bf4b65ea81fd3cc ]--- [ 38.894383] Kernel panic - not syncing: Fatal exception [ 38.900052] Kernel Offset: disabled [ 38.903656] Rebooting in 86400 seconds..