[....] Starting enhanced syslogd: rsyslogd[ 12.453578] audit: type=1400 audit(1514643037.131:4): avc: denied { syslog } for pid=3184 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 '10.128.0.43' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.458964] sg_write: data in/out 327644/96 bytes for SCSI command 0x0-- guessing data in; [ 19.458964] program syzkaller865391 not setting count and/or reply_len properly [ 19.476646] kasan: CONFIG_KASAN_INLINE enabled [ 19.482077] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.489455] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.495658] Dumping ftrace buffer: [ 19.499170] (ftrace buffer empty) [ 19.502849] Modules linked in: [ 19.506117] CPU: 1 PID: 3342 Comm: syzkaller865391 Not tainted 4.9.73-gf3f3457 #11 [ 19.513784] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.523109] task: ffff8801cba96000 task.stack: ffff8801c7890000 [ 19.529129] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 19.537175] RSP: 0018:ffff8801c7897a50 EFLAGS: 00010246 [ 19.542586] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff82667453 [ 19.549822] RDX: 0000000000000000 RSI: 000000000000002b RDI: ffff8801c993a270 [ 19.557059] RBP: ffff8801c7897b58 R08: 0000000000000000 R09: ffffed003956aba9 [ 19.564298] R10: 0000000000000005 R11: ffffed003956aba8 R12: 0000000000001000 [ 19.571532] R13: 0000000000000000 R14: ffff8801cab55d20 R15: ffff8801c993a240 [ 19.578768] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000990b840 [ 19.586961] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.592806] CR2: 0000000020ce2000 CR3: 00000001cc4ae000 CR4: 00000000001406e0 [ 19.600042] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.607275] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.614510] Stack: [ 19.616627] ffff8801d4f126c0 ffff8801c7897a80 ffff8801c993a258 ffff88010000002b [ 19.624569] 0000000000000000 ffff8801c993a268 000000000000004f 0000000000000246 [ 19.632511] ffff8801d1427b80 1ffff10038f12f56 0000000020ce2000 0000000020ce2024 [ 19.640449] Call Trace: [ 19.643005] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.649636] [] ? fsnotify+0xf30/0xf30 [ 19.655051] [] ? avc_policy_seqno+0x9/0x20 [ 19.660900] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 19.667886] [] ? security_file_permission+0x89/0x1e0 [ 19.674606] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.681235] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.687868] [] compat_do_readv_writev+0x522/0x760 [ 19.694325] [] ? do_pwritev+0x1a0/0x1a0 [ 19.699913] [] ? sg_ioctl+0x2c30/0x2c30 [ 19.705502] [] ? do_iter_readv_writev+0x400/0x400 [ 19.711958] [] ? __might_sleep+0x95/0x1a0 [ 19.717723] [] ? __inode_security_revalidate+0xd9/0x130 [ 19.724704] [] ? avc_policy_seqno+0x9/0x20 [ 19.730556] [] ? selinux_file_permission+0x82/0x460 [ 19.737188] [] ? security_file_permission+0x89/0x1e0 [ 19.743905] [] compat_readv+0xe3/0x150 [ 19.749416] [] do_compat_readv+0xf4/0x1d0 [ 19.755180] [] ? compat_readv+0x150/0x150 [ 19.760940] [] ? SyS_read+0x1b0/0x1b0 [ 19.766359] [] compat_SyS_readv+0x26/0x30 [ 19.772123] [] ? SyS_pwritev2+0x80/0x80 [ 19.777732] [] do_fast_syscall_32+0x2f7/0x890 [ 19.783855] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.790493] [] entry_SYSENTER_compat+0x51/0x60 [ 19.796692] 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 [ 19.823017] RIP [] sg_read+0xd0c/0x1440 [ 19.828723] RSP [ 19.832389] ---[ end trace 4bff183ca9b06f6e ]--- [ 19.837137] Kernel panic - not syncing: Fatal exception [ 19.842876] Dumping ftrace buffer: [ 19.846377] (ftrace buffer empty) [ 19.850052] Kernel Offset: disabled [ 19.853643] Rebooting in 86400 seconds..