[....] Starting enhanced syslogd: rsyslogd[ 12.706186] audit: type=1400 audit(1514309919.573:4): avc: denied { syslog } for pid=3176 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-6,10.128.0.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.461029] kasan: CONFIG_KASAN_INLINE enabled [ 32.465652] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.472981] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.479176] Dumping ftrace buffer: [ 32.482680] (ftrace buffer empty) [ 32.486357] Modules linked in: [ 32.489633] CPU: 0 PID: 3335 Comm: syzkaller520438 Not tainted 4.9.71-g2506378 #113 [ 32.497388] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.506708] task: ffff8801c9b29800 task.stack: ffff8801c8758000 [ 32.512727] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 32.520950] RSP: 0018:ffff8801c875f9b0 EFLAGS: 00010a07 [ 32.526361] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 32.533599] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 32.540839] RBP: ffff8801c875f9c0 R08: 0000000000000001 R09: 0000000000000000 [ 32.548076] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 32.555311] R13: 0000000000000020 R14: ffff8801c8678000 R15: dffffc0000000000 [ 32.562548] FS: 00000000015c4880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 32.570741] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.576595] CR2: 0000000020ef0fe0 CR3: 00000001c86b7000 CR4: 00000000001406f0 [ 32.583833] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.591077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.598309] Stack: [ 32.600426] ffff8801c9b29800 ffff8801c8678158 ffff8801c875fa20 ffffffff82664e11 [ 32.608378] ffff8801c8678170 ffffed00390cf02b ffffed00390cf02e ffff8801c8678168 [ 32.616323] dead4ead00000000 ffff8801c8678140 0000000000000000 0000000000000000 [ 32.624268] Call Trace: [ 32.626825] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 32.633284] [] sg_finish_rem_req+0x2b5/0x340 [ 32.639308] [] sg_new_read.isra.20+0x39/0x3e0 [ 32.645424] [] ? sg_get_rq_mark+0x142/0x190 [ 32.651365] [] sg_read+0x8bd/0x1440 [ 32.656606] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.663238] [] ? fsnotify+0xf30/0xf30 [ 32.668656] [] ? avc_policy_seqno+0x9/0x20 [ 32.674512] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 32.681491] [] ? security_file_permission+0x89/0x1e0 [ 32.688208] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.694840] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.701470] [] do_readv_writev+0x520/0x750 [ 32.707318] [] ? vfs_write+0x530/0x530 [ 32.712822] [] ? _raw_spin_unlock+0x2c/0x50 [ 32.718761] [] ? __pmd_alloc+0x410/0x410 [ 32.724437] [] ? __do_page_fault+0x5ec/0xd40 [ 32.730463] [] vfs_readv+0x84/0xc0 [ 32.735616] [] do_readv+0xe6/0x250 [ 32.740771] [] ? vfs_readv+0xc0/0xc0 [ 32.746098] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 32.752733] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 32.759540] [] SyS_readv+0x27/0x30 [ 32.764696] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 32.771239] 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 [ 32.797560] RIP [] __free_pages+0x21/0x80 [ 32.803439] RSP [ 32.807523] ---[ end trace 4b60513c58096d25 ]--- [ 32.812263] Kernel panic - not syncing: Fatal exception [ 32.817972] Dumping ftrace buffer: [ 32.821477] (ftrace buffer empty) [ 32.825152] Kernel Offset: disabled [ 32.828745] Rebooting in 86400 seconds..