[....] Starting enhanced syslogd: rsyslogd[ 13.606126] audit: type=1400 audit(1544771110.570:4): avc: denied { syslog } for pid=1920 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 '10.128.10.21' (ECDSA) to the list of known hosts. executing program executing program executing program executing program syzkaller login: [ 30.880574] kasan: CONFIG_KASAN_INLINE enabled [ 30.885043] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.897913] Modules linked in: [ 30.901197] CPU: 0 PID: 2091 Comm: syz-executor364 Not tainted 4.4.167+ #4 [ 30.908178] task: ffff8801d4c84740 task.stack: ffff8801d43d8000 [ 30.914231] RIP: 0010:[] [] tcp_sendpage+0x40a/0x17e0 [ 30.922793] RSP: 0018:ffff8801d43df988 EFLAGS: 00010206 [ 30.928231] RAX: 000000000000000f RBX: 000000000000fd58 RCX: 1ffff1001707c193 [ 30.935480] RDX: 0000000000000000 RSI: ffffffff823f5919 RDI: 0000000000000078 [ 30.942722] RBP: ffff8801d43dfae8 R08: ffff8801d4c85050 R09: 0000000000000000 [ 30.949966] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff823f5520 [ 30.957297] R13: ffff8800b83e0a40 R14: 0000000000000000 R15: dffffc0000000000 [ 30.964541] FS: 00007fe017f06700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 30.972739] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.978592] CR2: 00007fe017ec3e78 CR3: 00000001d4c7f000 CR4: 00000000001606b0 [ 30.985836] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.993078] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.000320] Stack: [ 31.002444] 9c09e6e5edbfecb0 0000000000000000 ffff8801d4c85008 ffffed003a990a00 [ 31.010529] fffffbfff0634d24 dffffc0000000000 ffff8801d43dfa08 0000000000000000 [ 31.018564] ffff8800b83e0e28 ffff8801d43dfa40 0000000600000007 ffff8801d4c84740 [ 31.026576] Call Trace: [ 31.029155] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 31.035641] [] ? check_preemption_disabled+0x3b/0x200 [ 31.042457] [] ? inet_sendpage+0x14b/0x510 [ 31.048381] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 31.054768] [] inet_sendpage+0x221/0x510 [ 31.060455] [] ? inet_sendpage+0x7b/0x510 [ 31.066241] [] kernel_sendpage+0x93/0xf0 [ 31.071929] [] ? inet_getname+0x3b0/0x3b0 [ 31.077704] [] sock_sendpage+0x8c/0xc0 [ 31.083221] [] ? kernel_sendpage+0xf0/0xf0 [ 31.089090] [] pipe_to_sendpage+0x266/0x330 [ 31.095039] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 31.101701] [] ? splice_from_pipe_next.part.3+0x248/0x310 [ 31.109432] [] __splice_from_pipe+0x364/0x790 [ 31.115550] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 31.122191] [] splice_from_pipe+0xf9/0x170 [ 31.128050] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 31.134687] [] ? splice_shrink_spd+0x60/0x60 [ 31.140728] [] ? security_file_permission+0x8f/0x1e0 [ 31.147469] [] generic_splice_sendpage+0x3c/0x50 [ 31.153852] [] ? splice_from_pipe+0x170/0x170 [ 31.159970] [] SyS_splice+0xde1/0x1430 [ 31.165489] [] ? _raw_spin_unlock_irq+0x27/0x50 [ 31.171787] [] ? compat_SyS_vmsplice+0x160/0x160 [ 31.178174] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 31.184648] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 31.191235] 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 [ 31.218391] RIP [] tcp_sendpage+0x40a/0x17e0 [ 31.224548] RSP [ 31.228217] ---[ end trace 01f82cc6c3cd8859 ]--- [ 31.233016] Kernel panic - not syncing: Fatal exception [ 31.238683] Kernel Offset: disabled [ 31.242289] Rebooting in 86400 seconds..