[....] Starting enhanced syslogd: rsyslogd[ 12.178835] audit: type=1400 audit(1514918907.015:4): avc: denied { syslog } for pid=3169 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.215226] kasan: CONFIG_KASAN_INLINE enabled [ 24.219833] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.227208] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.233410] Dumping ftrace buffer: [ 24.236919] (ftrace buffer empty) [ 24.240597] Modules linked in: [ 24.243866] CPU: 0 PID: 3333 Comm: syzkaller210141 Not tainted 4.9.73-gf3f3457 #11 [ 24.251534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.260858] task: ffff8801c7913000 task.stack: ffff8801c79a0000 [ 24.266878] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 24.274930] RSP: 0018:ffff8801c79a7a50 EFLAGS: 00010246 [ 24.280344] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff82667453 [ 24.287580] RDX: 0000000000000000 RSI: 000000000000006e RDI: ffff8801c8fb2270 [ 24.294816] RBP: ffff8801c79a7b58 R08: b54c6d8b5ad7cb0c R09: ffffed00394c9155 [ 24.302053] R10: 0000000000000005 R11: ffffed00394c9154 R12: 0000000000001000 [ 24.309297] R13: 0000000000000000 R14: ffff8801ca648a80 R15: ffff8801c8fb2240 [ 24.316641] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008a99840 [ 24.324838] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 24.330687] CR2: 0000000020188000 CR3: 00000001c9946000 CR4: 00000000001406f0 [ 24.337926] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.345163] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.352397] Stack: [ 24.354510] ffff8801d4ddb9c0 ffff8801c79a7a80 ffff8801c8fb2258 ffff88010000006e [ 24.362459] 0000000000000000 ffff8801c8fb2268 0000000000000092 0000000000000246 [ 24.370426] ffff8801d1528500 1ffff10038f34f56 0000000020188000 0000000020188024 [ 24.378378] Call Trace: [ 24.380936] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.387571] [] ? fsnotify+0xf30/0xf30 [ 24.392990] [] ? avc_policy_seqno+0x9/0x20 [ 24.398937] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 24.405921] [] ? security_file_permission+0x89/0x1e0 [ 24.412637] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.419278] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.425911] [] compat_do_readv_writev+0x522/0x760 [ 24.432366] [] ? do_pwritev+0x1a0/0x1a0 [ 24.437964] [] ? selinux_capable+0x40/0x40 [ 24.443814] [] ? selinux_capable+0x40/0x40 [ 24.449672] [] compat_readv+0xe3/0x150 [ 24.455176] [] do_compat_readv+0xf4/0x1d0 [ 24.460938] [] ? compat_readv+0x150/0x150 [ 24.466701] [] ? compat_SyS_ioctl+0x8c/0x2050 [ 24.472821] [] compat_SyS_readv+0x26/0x30 [ 24.478588] [] ? SyS_pwritev2+0x80/0x80 [ 24.484178] [] do_fast_syscall_32+0x2f7/0x890 [ 24.490286] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.496916] [] entry_SYSENTER_compat+0x51/0x60 [ 24.503114] 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 [ 24.529362] RIP [] sg_read+0xd0c/0x1440 [ 24.535060] RSP [ 24.538848] ---[ end trace ee53be340577bd2e ]--- [ 24.543587] Kernel panic - not syncing: Fatal exception [ 24.549298] Dumping ftrace buffer: [ 24.552802] (ftrace buffer empty) [ 24.556477] Kernel Offset: disabled [ 24.560068] Rebooting in 86400 seconds..