[....] Starting enhanced syslogd: rsyslogd[ 11.255342] audit: type=1400 audit(1514758698.941:4): avc: denied { syslog } for pid=3171 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[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] 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 Warning: Permanently added '10.128.15.222' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.229472] kasan: CONFIG_KASAN_INLINE enabled [ 25.230255] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.231331] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 25.232162] Dumping ftrace buffer: [ 25.232696] (ftrace buffer empty) [ 25.233244] Modules linked in: [ 25.233883] CPU: 1 PID: 3327 Comm: syzkaller505540 Not tainted 4.9.73-gf3f3457 #11 [ 25.234929] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.236216] task: ffff8801cc024800 task.stack: ffff8801c9618000 [ 25.237013] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 25.238157] RSP: 0018:ffff8801c961fa50 EFLAGS: 00010246 [ 25.238917] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff82667453 [ 25.239943] RDX: 0000000000000000 RSI: 000000000000002b RDI: ffff8801c9acc370 [ 25.240918] RBP: ffff8801c961fb58 R08: 8551c99c2a45b4bd R09: ffffed00395237e5 [ 25.241918] R10: 0000000000000005 R11: ffffed00395237e4 R12: 0000000000001000 [ 25.242918] R13: 0000000000000000 R14: ffff8801ca91bf00 R15: ffff8801c9acc340 [ 25.243880] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000088ad840 [ 25.244952] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.245741] CR2: 000000002066ffb1 CR3: 00000001c9655000 CR4: 00000000001406e0 [ 25.246736] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.247703] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.248680] Stack: [ 25.248977] ffff8801d57dcf00 ffff8801c961fa80 ffff8801c9acc358 ffff88010000002b [ 25.253065] 0000000000000000 ffff8801c9acc368 000000000000004f 0000000000000246 [ 25.261052] ffff8801d14dd400 1ffff100392c3f56 000000002066ffb1 000000002066ffd5 [ 25.269001] Call Trace: [ 25.271552] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.278187] [] ? fsnotify+0xf30/0xf30 [ 25.283612] [] ? avc_policy_seqno+0x9/0x20 [ 25.289467] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 25.296447] [] ? security_file_permission+0x89/0x1e0 [ 25.303175] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.309805] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.316449] [] compat_do_readv_writev+0x522/0x760 [ 25.322908] [] ? do_pwritev+0x1a0/0x1a0 [ 25.328508] [] ? __lru_cache_add+0x187/0x250 [ 25.334550] [] ? _raw_spin_unlock+0x2c/0x50 [ 25.340500] [] ? __pmd_alloc+0x410/0x410 [ 25.346177] [] ? selinux_file_permission+0x82/0x460 [ 25.352820] [] compat_readv+0xe3/0x150 [ 25.358331] [] do_compat_readv+0xf4/0x1d0 [ 25.364105] [] ? compat_readv+0x150/0x150 [ 25.369870] [] compat_SyS_readv+0x26/0x30 [ 25.375643] [] ? SyS_pwritev2+0x80/0x80 [ 25.381236] [] do_fast_syscall_32+0x2f7/0x890 [ 25.387346] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.393981] [] entry_SYSENTER_compat+0x51/0x60 [ 25.400180] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 df 05 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 [ 25.426532] RIP [] sg_read+0xd0c/0x1440 [ 25.432850] RSP [ 25.436520] ---[ end trace 325f3c5abea3c86a ]--- [ 25.441248] Kernel panic - not syncing: Fatal exception [ 25.446969] Dumping ftrace buffer: [ 25.450481] (ftrace buffer empty) [ 25.454159] Kernel Offset: disabled [ 25.457753] Rebooting in 86400 seconds..