[....] Starting enhanced syslogd: rsyslogd[ 14.102619] audit: type=1400 audit(1544772649.978:4): avc: denied { syslog } for pid=1928 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 '10.128.0.49' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 37.650267] kasan: CONFIG_KASAN_INLINE enabled [ 37.654718] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.667720] Modules linked in: [ 37.671125] CPU: 1 PID: 2115 Comm: syz-executor573 Not tainted 4.4.167+ #4 [ 37.678217] task: ffff8801d42597c0 task.stack: ffff8801d4148000 [ 37.684260] RIP: 0010:[] [] tcp_sendpage+0x40a/0x17e0 [ 37.692767] RSP: 0018:ffff8801d414f910 EFLAGS: 00010206 [ 37.698195] RAX: 000000000000000f RBX: 000000000000fd58 RCX: 1ffff10016e072db [ 37.705446] RDX: 0000000000000000 RSI: ffffffff823f5919 RDI: 0000000000000078 [ 37.712695] RBP: ffff8801d414fa70 R08: ffff8801d425a0d0 R09: 0000000000000000 [ 37.719939] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff823f5520 [ 37.727305] R13: ffff8800b7039480 R14: 0000000000000000 R15: dffffc0000000000 [ 37.734553] FS: 0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:00000000f7734b40 [ 37.742854] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 37.748819] CR2: 000000002002013f CR3: 00000001d4356000 CR4: 00000000001606b0 [ 37.756080] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.763330] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.770638] Stack: [ 37.772773] ffff8801d414f998 ffffffff82705741 0000000000000000 ffff8801d425a088 [ 37.780881] fffffbfff0634d24 ffff8801d42597c0 dffffc0000000000 0000000000000000 [ 37.788992] ffff8800b7039868 ffff8801d414f9c8 ffff8801d425a080 0000000600000007 [ 37.797083] Call Trace: [ 37.799653] [] ? __schedule+0x7e1/0x1e40 [ 37.805510] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 37.811911] [] ? check_preemption_disabled+0x3b/0x200 [ 37.818772] [] ? inet_sendpage+0x14b/0x510 [ 37.824640] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 37.831021] [] inet_sendpage+0x221/0x510 [ 37.836721] [] ? inet_sendpage+0x7b/0x510 [ 37.842595] [] kernel_sendpage+0x93/0xf0 [ 37.848392] [] ? inet_getname+0x3b0/0x3b0 [ 37.854172] [] sock_sendpage+0x8c/0xc0 [ 37.859700] [] ? kernel_sendpage+0xf0/0xf0 [ 37.865560] [] pipe_to_sendpage+0x266/0x330 [ 37.871511] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 37.878220] [] ? splice_from_pipe_next.part.3+0x248/0x310 [ 37.885392] [] __splice_from_pipe+0x364/0x790 [ 37.891511] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 37.898151] [] splice_from_pipe+0xf9/0x170 [ 37.904112] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 37.910769] [] ? splice_shrink_spd+0x60/0x60 [ 37.916805] [] ? security_file_permission+0x8f/0x1e0 [ 37.923538] [] generic_splice_sendpage+0x3c/0x50 [ 37.929920] [] ? splice_from_pipe+0x170/0x170 [ 37.936041] [] SyS_splice+0xde1/0x1430 [ 37.941683] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 37.948417] [] ? compat_SyS_vmsplice+0x160/0x160 [ 37.954804] [] ? do_fast_syscall_32+0xdb/0xa80 [ 37.961010] [] ? compat_SyS_vmsplice+0x160/0x160 [ 37.967391] [] do_fast_syscall_32+0x31e/0xa80 [ 37.973516] [] sysenter_flags_fixed+0xd/0x1a [ 37.979655] 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 [ 38.006966] RIP [] tcp_sendpage+0x40a/0x17e0 [ 38.013121] RSP [ 38.016816] ---[ end trace 967500f8691d6f1e ]--- [ 38.021694] Kernel panic - not syncing: Fatal exception [ 38.027455] Kernel Offset: disabled [ 38.031064] Rebooting in 86400 seconds..