[....] Starting enhanced syslogd: rsyslogd[ 10.917207] audit: type=1400 audit(1514771272.052:4): avc: denied { syslog } for pid=3167 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 '10.128.15.198' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 18.820220] kasan: CONFIG_KASAN_INLINE enabled [ 18.821034] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.822013] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 18.822834] Dumping ftrace buffer: [ 18.823307] (ftrace buffer empty) [ 18.823812] Modules linked in: [ 18.824318] CPU: 0 PID: 3315 Comm: syzkaller018110 Not tainted 4.9.73-gf3f3457 #11 [ 18.825365] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.826619] task: ffff8801cb880000 task.stack: ffff8801caa30000 [ 18.827430] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 18.828535] RSP: 0018:ffff8801caa37a50 EFLAGS: 00010a07 [ 18.829279] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 18.830246] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 18.831197] RBP: ffff8801caa37a60 R08: 0000000000000001 R09: 0000000000000000 [ 18.832159] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 18.833109] R13: 0000000000000020 R14: ffff8801c0eac200 R15: dffffc0000000000 [ 18.834062] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000087de840 [ 18.835136] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 18.835925] CR2: 0000000020001000 CR3: 00000001ca0e1000 CR4: 00000000001406f0 [ 18.836876] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.837878] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.838855] Stack: [ 18.839150] ffff8801cb880000 ffff8801c0eac358 ffff8801caa37ac0 ffffffff82664fc1 [ 18.840312] ffff8801c0eac370 ffffed00381d586b ffffed00381d586e ffff8801c0eac368 [ 18.846697] dead4ead00000000 ffff8801c0eac340 0000000000000000 0000000000000000 [ 18.854649] Call Trace: [ 18.857204] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 18.863659] [] sg_finish_rem_req+0x2b5/0x340 [ 18.869693] [] sg_new_read.isra.20+0x39/0x3e0 [ 18.875804] [] ? sg_get_rq_mark+0x142/0x190 [ 18.881738] [] sg_read+0x8bd/0x1440 [ 18.886979] [] ? save_stack_trace+0x16/0x20 [ 18.892914] [] ? save_stack+0x43/0xd0 [ 18.898337] [] ? kasan_slab_free+0x72/0xc0 [ 18.904183] [] ? kmem_cache_free+0xc7/0x300 [ 18.910120] [] ? putname+0xee/0x130 [ 18.915364] [] ? do_sys_open+0x252/0x4c0 [ 18.921038] [] ? do_fast_syscall_32+0x2f7/0x890 [ 18.927325] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.933957] [] ? debug_check_no_obj_freed+0x154/0xa10 [ 18.940765] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 18.947667] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.954299] [] __vfs_read+0x103/0x670 [ 18.959725] [] ? default_llseek+0x290/0x290 [ 18.965664] [] ? fsnotify+0x86/0xf30 [ 18.970993] [] ? fsnotify+0xf30/0xf30 [ 18.976412] [] ? avc_policy_seqno+0x9/0x20 [ 18.982260] [] ? selinux_file_permission+0x82/0x460 [ 18.988890] [] ? security_file_permission+0x89/0x1e0 [ 18.995610] [] ? rw_verify_area+0xe5/0x2b0 [ 19.001460] [] vfs_read+0x11e/0x380 [ 19.006704] [] SyS_read+0xd9/0x1b0 [ 19.011870] [] ? vfs_copy_file_range+0x740/0x740 [ 19.018239] [] ? do_fast_syscall_32+0xcf/0x890 [ 19.024446] [] ? vfs_copy_file_range+0x740/0x740 [ 19.030816] [] do_fast_syscall_32+0x2f7/0x890 [ 19.036924] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.043569] [] entry_SYSENTER_compat+0x51/0x60 [ 19.049762] Code: e9 27 fc ff ff 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d [ 19.076128] RIP [] __free_pages+0x21/0x80 [ 19.082017] RSP [ 19.086090] ---[ end trace 14d72cefa0876eec ]--- [ 19.090835] Kernel panic - not syncing: Fatal exception [ 19.096584] Dumping ftrace buffer: [ 19.100099] (ftrace buffer empty) [ 19.103774] Kernel Offset: disabled [ 19.107365] Rebooting in 86400 seconds..