[....] Starting enhanced syslogd: rsyslogd[ 12.236137] audit: type=1400 audit(1544774099.521:4): avc: denied { syslog } for pid=1904 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.71' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.674482] kasan: CONFIG_KASAN_INLINE enabled [ 40.679051] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.691908] Modules linked in: [ 40.695194] CPU: 1 PID: 2065 Comm: syz-executor796 Not tainted 4.4.167+ #4 [ 40.702176] task: ffff8801d515df00 task.stack: ffff8801ced48000 [ 40.708199] RIP: 0010:[] [] tcp_sendpage+0x40a/0x17e0 [ 40.716738] RSP: 0018:ffff8801ced4f988 EFLAGS: 00010206 [ 40.722163] RAX: 000000000000000f RBX: 000000000000fd58 RCX: 1ffff1001701a193 [ 40.729401] RDX: 0000000000000000 RSI: ffffffff823f5919 RDI: 0000000000000078 [ 40.736641] RBP: ffff8801ced4fae8 R08: ffff8801d515e810 R09: 0000000000000000 [ 40.743879] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff823f5520 [ 40.751128] R13: ffff8800b80d0a40 R14: 0000000000000000 R15: dffffc0000000000 [ 40.758458] FS: 00007fe3840fc700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 [ 40.766654] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.772503] CR2: 000000002002013f CR3: 00000001d62a2000 CR4: 00000000001606b0 [ 40.779745] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.787078] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.794320] Stack: [ 40.796439] f00170f62ed7c222 0000000000000000 ffff8801d515e7c8 ffffed003aa2bcf8 [ 40.804407] fffffbfff0634d24 dffffc0000000000 ffff8801ced4fa08 0000000000000000 [ 40.812379] ffff8800b80d0e28 ffff8801ced4fa40 0000000600000007 ffff8801d515df00 [ 40.820356] Call Trace: [ 40.822913] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 40.829291] [] ? check_preemption_disabled+0x3b/0x200 [ 40.836100] [] ? inet_sendpage+0x14b/0x510 [ 40.842068] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 40.848441] [] inet_sendpage+0x221/0x510 [ 40.854121] [] ? inet_sendpage+0x7b/0x510 [ 40.859888] [] kernel_sendpage+0x93/0xf0 [ 40.865654] [] ? inet_getname+0x3b0/0x3b0 [ 40.871423] [] sock_sendpage+0x8c/0xc0 [ 40.876929] [] ? kernel_sendpage+0xf0/0xf0 [ 40.882784] [] pipe_to_sendpage+0x266/0x330 [ 40.888725] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 40.895358] [] ? splice_from_pipe_next.part.3+0x248/0x310 [ 40.902515] [] __splice_from_pipe+0x364/0x790 [ 40.908632] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 40.915266] [] splice_from_pipe+0xf9/0x170 [ 40.921118] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 40.927752] [] ? splice_shrink_spd+0x60/0x60 [ 40.933781] [] ? security_file_permission+0x8f/0x1e0 [ 40.940502] [] generic_splice_sendpage+0x3c/0x50 [ 40.946873] [] ? splice_from_pipe+0x170/0x170 [ 40.952988] [] SyS_splice+0xde1/0x1430 [ 40.958494] [] ? _raw_spin_unlock_irq+0x27/0x50 [ 40.964780] [] ? compat_SyS_vmsplice+0x160/0x160 [ 40.971163] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 40.977632] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 40.984177] Code: ff ff ff 4c 0f 44 f0 e8 35 19 f1 fe 48 85 db 0f 84 d4 02 00 00 e8 27 19 f1 fe 49 8d 7e 78 8b 9d 58 ff ff ff 48 89 f8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 74 08 3c 03 0f 8e be 0f 00 00 41 2b 5e 78 [ 41.010904] RIP [] tcp_sendpage+0x40a/0x17e0 [ 41.017066] RSP [ 41.020741] ---[ end trace 3e20fafd05c011b3 ]--- [ 41.025493] Kernel panic - not syncing: Fatal exception [ 41.031353] Kernel Offset: disabled [ 41.034955] Rebooting in 86400 seconds..