[....] Starting enhanced syslogd: rsyslogd[ 11.236109] audit: type=1400 audit(1514352187.505:4): 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[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 'ci-android-49-kasan-gce-386-1,10.128.0.80' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.569487] kasan: CONFIG_KASAN_INLINE enabled [ 19.574146] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.581477] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.587675] Dumping ftrace buffer: [ 19.591180] (ftrace buffer empty) [ 19.594858] Modules linked in: [ 19.598135] CPU: 0 PID: 3317 Comm: syzkaller029724 Not tainted 4.9.71-g2506378 #9 [ 19.605725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.615057] task: ffff8801cab36000 task.stack: ffff8801c6fa0000 [ 19.621077] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.629303] RSP: 0018:ffff8801c6fa7a50 EFLAGS: 00010a07 [ 19.634720] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 19.641958] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 19.649196] RBP: ffff8801c6fa7a60 R08: 0000000000000001 R09: 0000000000000000 [ 19.656432] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 19.663675] R13: 0000000000000020 R14: ffff8801c9e64200 R15: dffffc0000000000 [ 19.670916] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000091ab840 [ 19.679112] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.684969] CR2: 0000000020fcbf70 CR3: 00000001c6ee0000 CR4: 00000000001406f0 [ 19.692209] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.699446] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.706681] Stack: [ 19.708797] ffff8801cab36000 ffff8801c9e64358 ffff8801c6fa7ac0 ffffffff82664e11 [ 19.716766] ffff8801c9e64370 ffffed00393cc86b ffffed00393cc86e ffff8801c9e64368 [ 19.724719] dead4ead00000000 ffff8801c9e64340 0000000000000000 0000000000000000 [ 19.732664] Call Trace: [ 19.735224] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.741682] [] sg_finish_rem_req+0x2b5/0x340 [ 19.747706] [] sg_new_read.isra.20+0x39/0x3e0 [ 19.753814] [] ? sg_get_rq_mark+0x142/0x190 [ 19.759748] [] sg_read+0x8bd/0x1440 [ 19.764992] [] ? __lock_is_held+0xa1/0xf0 [ 19.770753] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.777393] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.784033] [] __vfs_read+0x103/0x670 [ 19.789447] [] ? default_llseek+0x290/0x290 [ 19.795382] [] ? fsnotify+0x86/0xf30 [ 19.800710] [] ? fsnotify+0xf30/0xf30 [ 19.806125] [] ? avc_policy_seqno+0x9/0x20 [ 19.811973] [] ? selinux_file_permission+0x82/0x460 [ 19.818603] [] ? security_file_permission+0x89/0x1e0 [ 19.825319] [] ? rw_verify_area+0xe5/0x2b0 [ 19.831170] [] vfs_read+0x11e/0x380 [ 19.836412] [] SyS_read+0xd9/0x1b0 [ 19.841567] [] ? vfs_copy_file_range+0x740/0x740 [ 19.847939] [] ? do_fast_syscall_32+0xcf/0x890 [ 19.854134] [] ? vfs_copy_file_range+0x740/0x740 [ 19.860504] [] do_fast_syscall_32+0x2f7/0x890 [ 19.866613] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.873243] [] entry_SYSENTER_compat+0x51/0x60 [ 19.879436] 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 [ 19.906306] RIP [] __free_pages+0x21/0x80 [ 19.912187] RSP [ 19.916193] ---[ end trace 9ccb4aa525766f80 ]--- [ 19.920935] Kernel panic - not syncing: Fatal exception [ 19.926698] Dumping ftrace buffer: [ 19.930218] (ftrace buffer empty) [ 19.933896] Kernel Offset: disabled [ 19.937489] Rebooting in 86400 seconds..