[....] Starting enhanced syslogd: rsyslogd[ 11.106072] audit: type=1400 audit(1514789174.564:4): avc: denied { syslog } for pid=3170 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 '10.128.15.218' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 21.817300] kasan: CONFIG_KASAN_INLINE enabled [ 21.818109] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 21.819080] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 21.819900] Dumping ftrace buffer: [ 21.820374] (ftrace buffer empty) [ 21.820869] Modules linked in: [ 21.821338] CPU: 0 PID: 3321 Comm: syzkaller873780 Not tainted 4.9.73-gf3f3457 #11 [ 21.822347] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.823567] task: ffff8801cb583000 task.stack: ffff8801c9da0000 [ 21.824372] RIP: 0010:[] [] sg_remove_scat.isra.19+0x17b/0x2d0 [ 21.825616] RSP: 0018:ffff8801c9da7ac0 EFLAGS: 00010202 [ 21.826333] RAX: 1ffff1003913c02d RBX: ffff8801c89e0158 RCX: 0000000000000002 [ 21.827316] RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffff8801c88a421c [ 21.828267] RBP: ffff8801c9da7b10 R08: 0000000000000000 R09: ffffed0039344f55 [ 21.829219] R10: 0000000000000005 R11: ffffed0039344f54 R12: 0000000000000002 [ 21.830185] R13: 0000000000000010 R14: 0000000000000000 R15: dffffc0000000000 [ 21.831137] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f76e2b40 [ 21.832220] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 21.832991] CR2: 0000000020007000 CR3: 00000001cae50000 CR4: 00000000001406f0 [ 21.833954] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.834944] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.835894] Stack: [ 21.836193] ffff8801c89e0170 ffffed003913c02b ffffed003913c02e ffff8801c89e0168 [ 21.837320] ffff8801c88a4200 ffff8801c89e0140 0000000000000000 0000000000000000 [ 21.844771] 0000000000000000 ffff8801c89e0238 ffff8801c9da7b50 ffffffff82665385 [ 21.852721] Call Trace: [ 21.855272] [] sg_finish_rem_req+0x2b5/0x340 [ 21.861294] [] sg_read+0xa1c/0x1440 [ 21.866553] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 21.873189] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 21.880170] [] ? check_preemption_disabled+0x3b/0x200 [ 21.886975] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 21.893608] [] __vfs_read+0x103/0x670 [ 21.899023] [] ? default_llseek+0x290/0x290 [ 21.904962] [] ? fsnotify+0x86/0xf30 [ 21.910293] [] ? fsnotify+0xf30/0xf30 [ 21.915711] [] ? avc_policy_seqno+0x9/0x20 [ 21.921575] [] ? selinux_file_permission+0x82/0x460 [ 21.928215] [] ? security_file_permission+0x89/0x1e0 [ 21.934932] [] ? rw_verify_area+0xe5/0x2b0 [ 21.940785] [] vfs_read+0x11e/0x380 [ 21.946026] [] SyS_read+0xd9/0x1b0 [ 21.951186] [] ? vfs_copy_file_range+0x740/0x740 [ 21.957557] [] ? do_fast_syscall_32+0xcf/0x890 [ 21.963756] [] ? vfs_copy_file_range+0x740/0x740 [ 21.970130] [] do_fast_syscall_32+0x2f7/0x890 [ 21.976256] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 21.982893] [] entry_SYSENTER_compat+0x51/0x60 [ 21.989178] Code: 45 b8 eb 3e e8 c7 44 d0 fe 48 8b 45 c8 48 c1 e8 03 42 80 3c 38 00 0f 85 3a 01 00 00 4c 8b 73 10 4b 8d 14 2e 48 89 d1 48 c1 e9 03 <42> 80 3c 39 00 0f 85 0b 01 00 00 48 8b 12 49 83 c5 08 48 85 d2 [ 22.015588] RIP [] sg_remove_scat.isra.19+0x17b/0x2d0 [ 22.022508] RSP [ 22.028193] ---[ end trace 43aaa893d8877d63 ]--- [ 22.032945] Kernel panic - not syncing: Fatal exception [ 22.038671] Dumping ftrace buffer: [ 22.042179] (ftrace buffer empty) [ 22.045856] Kernel Offset: disabled [ 22.049449] Rebooting in 86400 seconds..