[....] Starting enhanced syslogd: rsyslogd[ 13.180471] audit: type=1400 audit(1514313223.971:4): avc: denied { syslog } for pid=3181 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 'ci-android-49-kasan-gce-386-1,10.128.0.114' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.546776] kasan: CONFIG_KASAN_INLINE enabled [ 26.551360] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.558804] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.565005] Dumping ftrace buffer: [ 26.568512] (ftrace buffer empty) [ 26.572187] Modules linked in: [ 26.575460] CPU: 1 PID: 3337 Comm: syzkaller168143 Not tainted 4.9.71-g2506378 #9 [ 26.583048] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.592371] task: ffff8801c9669800 task.stack: ffff8801c1448000 [ 26.598394] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 26.606624] RSP: 0018:ffff8801c144fa50 EFLAGS: 00010a07 [ 26.612041] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 26.619276] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 26.626511] RBP: ffff8801c144fa60 R08: 0000000000000001 R09: 0000000000000000 [ 26.633772] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 26.641008] R13: 0000000000000020 R14: ffff8801c999a100 R15: dffffc0000000000 [ 26.648242] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000081c7840 [ 26.656432] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 26.662278] CR2: 00000000205cbf70 CR3: 00000001c205a000 CR4: 00000000001406e0 [ 26.669515] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.676748] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.683980] Stack: [ 26.686092] ffff8801c9669800 ffff8801c999a258 ffff8801c144fac0 ffffffff82664e11 [ 26.694032] ffff8801c999a270 ffffed003933344b ffffed003933344e ffff8801c999a268 [ 26.701972] dead4ead00000000 ffff8801c999a240 0000000000000000 0000000000000000 [ 26.709908] Call Trace: [ 26.712464] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 26.718919] [] sg_finish_rem_req+0x2b5/0x340 [ 26.724941] [] sg_new_read.isra.20+0x39/0x3e0 [ 26.731051] [] ? sg_get_rq_mark+0x142/0x190 [ 26.736986] [] sg_read+0x8bd/0x1440 [ 26.742227] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 26.748856] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 26.755918] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 26.762545] [] __vfs_read+0x103/0x670 [ 26.767959] [] ? default_llseek+0x290/0x290 [ 26.773895] [] ? fsnotify+0x86/0xf30 [ 26.779222] [] ? fsnotify+0xf30/0xf30 [ 26.784636] [] ? avc_policy_seqno+0x9/0x20 [ 26.790486] [] ? selinux_file_permission+0x82/0x460 [ 26.797116] [] ? security_file_permission+0x89/0x1e0 [ 26.803831] [] ? rw_verify_area+0xe5/0x2b0 [ 26.809676] [] vfs_read+0x11e/0x380 [ 26.814917] [] SyS_read+0xd9/0x1b0 [ 26.820071] [] ? vfs_copy_file_range+0x740/0x740 [ 26.826443] [] ? do_fast_syscall_32+0xcf/0x890 [ 26.832640] [] ? vfs_copy_file_range+0x740/0x740 [ 26.839007] [] do_fast_syscall_32+0x2f7/0x890 [ 26.845114] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.851744] [] entry_SYSENTER_compat+0x51/0x60 [ 26.857937] 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 [ 26.884213] RIP [] __free_pages+0x21/0x80 [ 26.890091] RSP [ 26.893874] ---[ end trace 8b9bbc45591e352f ]--- [ 26.898598] Kernel panic - not syncing: Fatal exception [ 26.903962] Dumping ftrace buffer: [ 26.907471] (ftrace buffer empty) [ 26.911148] Kernel Offset: disabled [ 26.914748] Rebooting in 86400 seconds..