[....] Starting enhanced syslogd: rsyslogd[ 13.789142] audit: type=1400 audit(1544982525.784:4): avc: denied { syslog } for pid=1921 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 '10.128.0.115' (ECDSA) to the list of known hosts. 2018/12/16 17:49:00 parsed 1 programs 2018/12/16 17:49:02 executed programs: 0 2018/12/16 17:49:11 executed programs: 6 syzkaller login: [ 40.227531] kasan: CONFIG_KASAN_INLINE enabled [ 40.233221] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.256424] Modules linked in: [ 40.259760] CPU: 0 PID: 4726 Comm: syz-executor4 Not tainted 4.4.167+ #4 [ 40.266598] task: ffff8801cff14740 task.stack: ffff8801d1b38000 [ 40.272644] RIP: 0010:[] [] tcp_sendmsg+0x459/0x2b30 [ 40.281117] RSP: 0018:ffff8801d1b3f9a0 EFLAGS: 00010206 [ 40.286569] RAX: 0000000000000011 RBX: 000000007fb29588 RCX: 1ffff10039a1588e [ 40.293834] RDX: 0000000000000001 RSI: ffffffff823f7138 RDI: 0000000000000089 [ 40.301093] RBP: ffff8801d1b3fb68 R08: ffff8801cff15008 R09: 0000000000000001 [ 40.308356] R10: 0000000000000000 R11: ffffffff831a4978 R12: 0000000000000000 [ 40.315619] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801cd0ac200 [ 40.322897] FS: 00007fd5a1690700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 40.331113] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.336983] CR2: 00007fe2d721a1b0 CR3: 00000001d0042000 CR4: 00000000001606b0 [ 40.344250] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.351512] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.358783] Stack: [ 40.360921] ffff8801cc958000 ffff8801cd0ac228 0000000000000000 fffffbfff0634d24 [ 40.368984] ffff8801cff15940 0000000000000001 ffff8800b268b9c8 ffff8801cd0ac458 [ 40.377028] ffff8800b268b97c ffff8801cd0aca1b ffff8800b268b9c4 0000000100000246 [ 40.385107] Call Trace: [ 40.387701] [] ? tcp_sendpage+0x17e0/0x17e0 [ 40.393683] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 40.400433] [] ? check_preemption_disabled+0x3b/0x200 [ 40.407273] [] ? inet_sendmsg+0x143/0x4d0 [ 40.413063] [] inet_sendmsg+0x203/0x4d0 [ 40.418692] [] ? inet_sendmsg+0x73/0x4d0 [ 40.424394] [] ? inet_recvmsg+0x4c0/0x4c0 [ 40.430184] [] sock_sendmsg+0xbb/0x110 [ 40.435714] [] sock_write_iter+0x223/0x3b0 [ 40.441607] [] ? sock_sendmsg+0x110/0x110 [ 40.447413] [] ? inode_has_perm.isra.20+0x10c/0x160 [ 40.454067] [] ? iov_iter_init+0xaf/0x1d0 [ 40.459856] [] __vfs_write+0x304/0x3e0 [ 40.465388] [] ? __vfs_read+0x3d0/0x3d0 [ 40.471004] [] ? check_preemption_disabled+0x3b/0x200 [ 40.477839] [] ? selinux_file_permission+0x2f2/0x450 [ 40.484611] [] ? rw_verify_area+0x100/0x2f0 [ 40.490578] [] vfs_write+0x17e/0x4e0 [ 40.495947] [] SyS_write+0xd9/0x1c0 [ 40.501213] [] ? SyS_read+0x1c0/0x1c0 [ 40.506655] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 40.513179] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 40.519743] Code: 84 5d 09 00 00 e8 08 01 f1 fe 8b 85 18 ff ff ff 49 8d bc 24 89 00 00 00 48 89 fa 83 e2 07 89 85 f0 fe ff ff 48 89 f8 48 c1 e8 03 <42> 0f b6 04 30 38 d0 7f 08 84 c0 0f 85 2f 20 00 00 41 f6 84 24 [ 40.547604] RIP [] tcp_sendmsg+0x459/0x2b30 [ 40.553704] RSP [ 40.560354] ---[ end trace 48a6516cba68937e ]--- [ 40.565333] Kernel panic - not syncing: Fatal exception [ 40.571014] Kernel Offset: disabled [ 40.574622] Rebooting in 86400 seconds..