[....] Starting enhanced syslogd: rsyslogd[ 12.280586] audit: type=1400 audit(1521086689.070:4): avc: denied { syslog } for pid=3641 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 '10.128.10.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 20.139235] kasan: CONFIG_KASAN_INLINE enabled [ 20.143864] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 20.151462] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 20.157677] Dumping ftrace buffer: [ 20.161187] (ftrace buffer empty) [ 20.164868] Modules linked in: [ 20.168144] CPU: 0 PID: 3791 Comm: syzkaller606551 Not tainted 4.9.87-g5244700 #55 [ 20.175819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.185140] task: ffff8801d96ab000 task.stack: ffff8801d7ed8000 [ 20.191163] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 20.199391] RSP: 0018:ffff8801d7edf940 EFLAGS: 00010a07 [ 20.204806] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826692ab [ 20.212044] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 20.219280] RBP: ffff8801d7edf950 R08: 0000000048000000 R09: 0000000000001e30 [ 20.226517] R10: 0000000000002100 R11: ffff8801d96ab000 R12: 0000000000000004 [ 20.233754] R13: 0000000000000020 R14: ffff8801d7b32100 R15: dffffc0000000000 [ 20.240992] FS: 00007fc08e330700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 20.249185] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.255034] CR2: 0000000020e94000 CR3: 00000001d87f4000 CR4: 0000000000160670 [ 20.262273] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.269510] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.276748] Stack: [ 20.278865] 0000000000000001 ffff8801d7b32258 ffff8801d7edf9b0 ffffffff826692d1 [ 20.286831] ffff8801d7b32270 ffffed003af6644b ffffed003af6644e ffff8801d7b32268 [ 20.294799] dead4ead00000000 ffff8801d7b32240 0000000000000000 0000000000000000 [ 20.302758] Call Trace: [ 20.305315] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 20.311774] [] sg_finish_rem_req+0x2b5/0x340 [ 20.317796] [] sg_new_read.isra.20+0x18d/0x3e0 [ 20.323993] [] sg_read+0x8b7/0x1440 [ 20.329236] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 20.335867] [] ? fsnotify+0x86/0xf30 [ 20.341196] [] ? fsnotify+0xf30/0xf30 [ 20.346614] [] ? avc_policy_seqno+0x9/0x20 [ 20.352467] [] do_loop_readv_writev.part.17+0xc8/0x2b0 [ 20.359359] [] do_readv_writev+0x5fd/0x740 [ 20.365211] [] ? vfs_write+0x530/0x530 [ 20.370720] [] ? __fget+0x20a/0x3b0 [ 20.375962] [] ? __fget+0x231/0x3b0 [ 20.381204] [] ? __fget+0x47/0x3b0 [ 20.386358] [] vfs_readv+0x84/0xc0 [ 20.391517] [] do_readv+0xe6/0x250 [ 20.396674] [] ? vfs_readv+0xc0/0xc0 [ 20.402005] [] ? _raw_spin_unlock_irq+0x27/0x50 [ 20.408292] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 20.415098] [] SyS_readv+0x27/0x30 [ 20.420258] [] ? rw_copy_check_uvector+0x2c0/0x2c0 [ 20.426803] [] do_syscall_64+0x1a4/0x490 [ 20.432480] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 20.439369] 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 [ 20.465951] RIP [] __free_pages+0x21/0x80 [ 20.471833] RSP [ 20.475740] ---[ end trace 29c0a23785600158 ]--- [ 20.480588] Kernel panic - not syncing: Fatal exception [ 20.486324] Dumping ftrace buffer: [ 20.489835] (ftrace buffer empty) [ 20.493514] Kernel Offset: disabled [ 20.497107] Rebooting in 86400 seconds..