[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 9.542153] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.948645] random: crng init done Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. executing program executing program executing program [ 47.488307] kasan: CONFIG_KASAN_INLINE enabled [ 47.493039] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.500413] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.506655] Modules linked in: [ 47.509957] CPU: 1 PID: 2078 Comm: syz-executor176 Not tainted 4.9.141+ #23 [ 47.517046] task: ffff8801cf3e8000 task.stack: ffff8801ce200000 [ 47.523077] RIP: 0010:[] [] tcp_sendpage+0x35d/0x1910 [ 47.531721] RSP: 0018:ffff8801ce207920 EFLAGS: 00010206 [ 47.537150] RAX: 000000000000000f RBX: 0000000000000000 RCX: 1ffff1003a04c2eb [ 47.544513] RDX: 0000000000000000 RSI: ffffffff824e0eab RDI: 0000000000000078 [ 47.552006] RBP: ffff8801ce207a88 R08: ffff8801cf3e88b0 R09: 0000000000000000 [ 47.560919] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000fd58 [ 47.568441] R13: ffff8801cb486640 R14: ffff8801d0261500 R15: dffffc0000000000 [ 47.575792] FS: 0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:00000000f7736b40 [ 47.584365] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 47.590282] CR2: 00000000f7715db0 CR3: 00000001cb0c7000 CR4: 00000000001606b0 [ 47.598045] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.605470] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.612965] Stack: [ 47.615094] ffff8801ce207930 ffffffff81243c87 0000000000000246 ffff8801cf3e8000 [ 47.623090] ffffffff830cc2e0 fffffbfff067d37c 0000000000000000 ffff8801cf3e88b0 [ 47.631129] ffffed0039e7d115 0000000000000000 ffff8801d02618e8 ffff8801ce2079e0 [ 47.639136] Call Trace: [ 47.641701] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 47.648442] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 47.654829] [] ? check_preemption_disabled+0x3b/0x200 [ 47.661799] [] ? inet_sendpage+0x14b/0x510 [ 47.667799] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 47.674348] [] inet_sendpage+0x221/0x510 [ 47.680048] [] ? inet_sendpage+0x7b/0x510 [ 47.685830] [] kernel_sendpage+0x93/0xf0 [ 47.691532] [] ? inet_getname+0x3b0/0x3b0 [ 47.697320] [] sock_sendpage+0x8c/0xc0 [ 47.702833] [] ? kernel_sendpage+0xf0/0xf0 [ 47.708693] [] pipe_to_sendpage+0x266/0x330 [ 47.714751] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 47.721397] [] ? splice_from_pipe_next.part.2+0x226/0x2e0 [ 47.728587] [] __splice_from_pipe+0x316/0x710 [ 47.734716] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 47.741362] [] splice_from_pipe+0xf9/0x170 [ 47.747230] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 47.753886] [] ? splice_shrink_spd+0xb0/0xb0 [ 47.759929] [] ? security_file_permission+0x8f/0x1e0 [ 47.766660] [] generic_splice_sendpage+0x3c/0x50 [ 47.773149] [] ? splice_from_pipe+0x170/0x170 [ 47.779401] [] SyS_splice+0xe4d/0x14d0 [ 47.785026] [] ? check_preemption_disabled+0x3b/0x200 [ 47.791859] [] ? compat_SyS_vmsplice+0x160/0x160 [ 47.798375] [] ? do_fast_syscall_32+0xcf/0xa10 [ 47.804595] [] ? compat_SyS_vmsplice+0x160/0x160 [ 47.810979] [] do_fast_syscall_32+0x2f1/0xa10 [ 47.817190] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.823930] [] entry_SYSENTER_compat+0x90/0xa2 [ 47.830256] 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 [ 47.857586] RIP [] tcp_sendpage+0x35d/0x1910 [ 47.863747] RSP [ 47.867576] ---[ end trace a3f20260a3e526d8 ]--- [ 47.872318] Kernel panic - not syncing: Fatal exception [ 47.878015] Kernel Offset: disabled [ 47.881620] Rebooting in 86400 seconds..