[....] Starting enhanced syslogd: rsyslogd[ 12.910908] audit: type=1400 audit(1521849393.669:4): avc: denied { syslog } for pid=3654 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 '10.128.0.2' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 20.857765] kasan: CONFIG_KASAN_INLINE enabled [ 20.859696] kasan: CONFIG_KASAN_INLINE enabled [ 20.859698] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 20.859707] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 20.859711] Dumping ftrace buffer: [ 20.859714] (ftrace buffer empty) [ 20.859718] Modules linked in: [ 20.859725] CPU: 1 PID: 3813 Comm: syzkaller912058 Not tainted 4.9.89-gebc2789 #63 [ 20.859728] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.859732] task: ffff8801b47bc800 task.stack: ffff8801d7c18000 [ 20.859746] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 20.859749] RSP: 0018:ffff8801d7c1f938 EFLAGS: 00010a07 [ 20.859753] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82669f2b [ 20.859757] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 20.859760] RBP: ffff8801d7c1f948 R08: 0000000000000001 R09: 0000000000000000 [ 20.859763] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 20.859767] R13: 0000000000000020 R14: ffff8801d87aa100 R15: dffffc0000000000 [ 20.859772] FS: 00007f75514c8700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 20.859776] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.859779] CR2: 000000002085dff0 CR3: 00000001d8efc000 CR4: 0000000000160670 [ 20.859785] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.859789] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.859790] Stack: [ 20.859799] 0000000000000046 ffff8801d87aa258 ffff8801d7c1f9a8 ffffffff82669f51 [ 20.859812] ffff8801d87aa270 ffffed003b0f544b ffffed003b0f544e ffff8801d87aa268 [ 20.859820] dead4ead00000000 ffff8801d87aa240 0000000000000000 0000000000000000 [ 20.859821] Call Trace: [ 20.859830] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 20.859837] [] sg_finish_rem_req+0x2a6/0x320 [ 20.859845] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 20.859851] [] sg_new_read+0x3c/0x440 [ 20.859857] [] ? sg_get_rq_mark+0x142/0x190 [ 20.859862] [] sg_read+0x8c5/0x1470 [ 20.859869] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 20.859876] [] ? fsnotify+0x86/0xf30 [ 20.859882] [] ? fsnotify+0xf30/0xf30 [ 20.859891] [] ? avc_policy_seqno+0x9/0x20 [ 20.859900] [] do_loop_readv_writev.part.17+0xc8/0x2b0 [ 20.859907] [] do_readv_writev+0x5fd/0x740 [ 20.859914] [] ? vfs_write+0x530/0x530 [ 20.859921] [] ? _raw_spin_unlock+0x2c/0x50 [ 20.859927] [] ? __fget+0x20a/0x3b0 [ 20.859933] [] ? __fget+0x231/0x3b0 [ 20.859938] [] ? __fget+0x47/0x3b0 [ 20.859945] [] vfs_readv+0x84/0xc0 [ 20.859952] [] do_readv+0xe6/0x250 [ 20.859958] [] ? vfs_readv+0xc0/0xc0 [ 20.859965] [] SyS_readv+0x27/0x30 [ 20.859971] [] ? rw_copy_check_uvector+0x2c0/0x2c0 [ 20.859978] [] do_syscall_64+0x1a4/0x490 [ 20.859985] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 20.860084] 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 [ 20.860090] RIP [] __free_pages+0x21/0x80 [ 20.860092] RSP [ 20.860099] ---[ end trace faae5d91db45b443 ]--- [ 20.860102] Kernel panic - not syncing: Fatal exception [ 20.862738] Dumping ftrace buffer: [ 20.862740] (ftrace buffer empty) [ 20.862742] Kernel Offset: disabled [ 21.214587] Rebooting in 86400 seconds..