[....] Starting enhanced syslogd: rsyslogd[ 12.248972] audit: type=1400 audit(1519047366.552:4): avc: denied { syslog } for pid=3492 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.51' (ECDSA) to the list of known hosts. 2018/02/19 13:37:28 parsed 1 programs 2018/02/19 13:37:28 executed programs: 0 syzkaller login: [ 94.259922] IPVS: Creating netns size=2536 id=1 [ 94.291332] IPVS: Creating netns size=2536 id=2 [ 94.324049] IPVS: Creating netns size=2536 id=3 [ 94.368939] IPVS: Creating netns size=2536 id=4 [ 94.410301] IPVS: Creating netns size=2536 id=5 [ 94.447041] IPVS: Creating netns size=2536 id=6 [ 94.481859] IPVS: Creating netns size=2536 id=7 [ 94.518713] IPVS: Creating netns size=2536 id=8 2018/02/19 13:37:33 executed programs: 720 2018/02/19 13:37:38 executed programs: 1403 2018/02/19 13:37:43 executed programs: 2065 [ 112.845051] ================================================================== [ 112.852513] BUG: KASAN: out-of-bounds in __unwind_start+0x3a7/0x3c0 [ 112.858921] Read of size 8 at addr ffff8801c5107ab8 by task syz-executor2/16743 [ 112.866360] [ 112.867988] CPU: 1 PID: 16743 Comm: syz-executor2 Not tainted 4.9.82-gcdfc8df #37 [ 112.875601] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 112.884958] ffff8801c3e6f788 ffffffff81d94fc9 ffffea00071441c0 ffff8801c5107ab8 [ 112.893008] 0000000000000000 ffff8801c5107ac0 ffff8801c3e6f8b8 ffff8801c3e6f7c0 [ 112.901062] ffffffff8153e213 ffff8801c5107ab8 0000000000000008 0000000000000000 [ 112.909162] Call Trace: [ 112.911738] [] dump_stack+0xc1/0x128 [ 112.917102] [] print_address_description+0x73/0x280 [ 112.923769] [] kasan_report+0x275/0x360 [ 112.929394] [] ? __unwind_start+0x3a7/0x3c0 [ 112.935371] [] __asan_report_load8_noabort+0x14/0x20 [ 112.942120] [] __unwind_start+0x3a7/0x3c0 [ 112.947920] [] ? ptrace_may_access+0x24/0x50 [ 112.953975] [] __save_stack_trace+0x59/0xf0 [ 112.959948] [] save_stack_trace_tsk+0x48/0x70 [ 112.966096] [] proc_pid_stack+0x146/0x230 [ 112.971892] [] ? lock_trace+0xc0/0xc0 [ 112.977358] [] proc_single_show+0xf8/0x170 [ 112.983247] [] seq_read+0x32f/0x1290 [ 112.988622] [] ? seq_escape+0x200/0x200 [ 112.994250] [] ? fsnotify+0x86/0xf30 [ 112.999607] [] ? fsnotify+0xf30/0xf30 [ 113.005056] [] ? avc_policy_seqno+0x9/0x20 [ 113.010947] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 113.010957] [] ? security_file_permission+0x89/0x1e0 [ 113.010966] [] ? seq_escape+0x200/0x200 [ 113.010974] [] ? seq_escape+0x200/0x200 [ 113.010980] [] do_readv_writev+0x520/0x750 [ 113.010986] [] ? vfs_write+0x530/0x530 [ 113.010997] [] ? mark_held_locks+0xaf/0x100 [ 113.011005] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 113.011014] [] ? mutex_lock_nested+0x56f/0x870 [ 113.011020] [] ? __fdget_pos+0x9f/0xc0 [ 113.011026] [] ? __fget+0x20a/0x3b0 [ 113.011033] [] ? mutex_lock_killable_nested+0x960/0x960 [ 113.011038] [] ? __fget+0x231/0x3b0 [ 113.011044] [] ? __fget+0x47/0x3b0 [ 113.011051] [] vfs_readv+0x84/0xc0 [ 113.011057] [] do_readv+0xe6/0x250 [ 113.011061] [] ? vfs_readv+0xc0/0xc0 [ 113.011068] [] SyS_readv+0x27/0x30 [ 113.011074] [] ? rw_copy_check_uvector+0x2c0/0x2c0 [ 113.011081] [] do_syscall_64+0x1a5/0x490 [ 113.011091] [] entry_SYSCALL_64_after_swapgs+0x47/0xc5 [ 113.011094] [ 113.011096] The buggy address belongs to the page: [ 113.011104] page:ffffea00071441c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 113.011107] flags: 0x8000000000000000() [ 113.011109] page dumped because: kasan: bad access detected [ 113.011110] [ 113.011112] Memory state around the buggy address: [ 113.011117] ffff8801c5107980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 113.011121] ffff8801c5107a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 113.011125] >ffff8801c5107a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 113.011128] ^ [ 113.011132] ffff8801c5107b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 113.011136] ffff8801c5107b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 113.011138] ================================================================== [ 113.011140] Disabling lock debugging due to kernel taint [ 113.018913] Kernel panic - not syncing: panic_on_warn set ... [ 113.018913] [ 113.018921] CPU: 1 PID: 16743 Comm: syz-executor2 Tainted: G B 4.9.82-gcdfc8df #37 [ 113.018924] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.018937] ffff8801c3e6f6e0 ffffffff81d94fc9 ffffffff8419777f ffff8801c3e6f7b8 [ 113.018945] 0000000000000000 ffff8801c5107ac0 ffff8801c3e6f8b8 ffff8801c3e6f7a8 [ 113.018953] ffffffff8142f6c1 0000000041b58ab3 ffffffff8418b1f0 ffffffff8142f505 [ 113.018954] Call Trace: [ 113.018971] [] dump_stack+0xc1/0x128 [ 113.018982] [] panic+0x1bc/0x3a8 [ 113.018991] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 113.019001] [] ? preempt_schedule+0x25/0x30 [ 113.019008] [] ? ___preempt_schedule+0x16/0x18 [ 113.019017] [] kasan_end_report+0x50/0x50 [ 113.019023] [] kasan_report+0x167/0x360 [ 113.019033] [] ? __unwind_start+0x3a7/0x3c0 [ 113.019040] [] __asan_report_load8_noabort+0x14/0x20 [ 113.019046] [] __unwind_start+0x3a7/0x3c0 [ 113.019055] [] ? ptrace_may_access+0x24/0x50 [ 113.019063] [] __save_stack_trace+0x59/0xf0 [ 113.019069] [] save_stack_trace_tsk+0x48/0x70 [ 113.019078] [] proc_pid_stack+0x146/0x230 [ 113.019084] [] ? lock_trace+0xc0/0xc0 [ 113.019091] [] proc_single_show+0xf8/0x170 [ 113.019100] [] seq_read+0x32f/0x1290 [ 113.019108] [] ? seq_escape+0x200/0x200 [ 113.019114] [] ? fsnotify+0x86/0xf30 [ 113.019119] [] ? fsnotify+0xf30/0xf30 [ 113.019129] [] ? avc_policy_seqno+0x9/0x20 [ 113.019138] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 113.019145] [] ? security_file_permission+0x89/0x1e0 [ 113.019150] [] ? seq_escape+0x200/0x200 [ 113.019156] [] ? seq_escape+0x200/0x200 [ 113.019162] [] do_readv_writev+0x520/0x750 [ 113.019167] [] ? vfs_write+0x530/0x530 [ 113.019176] [] ? mark_held_locks+0xaf/0x100 [ 113.019183] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 113.019190] [] ? mutex_lock_nested+0x56f/0x870 [ 113.019196] [] ? __fdget_pos+0x9f/0xc0 [ 113.019200] [] ? __fget+0x20a/0x3b0 [ 113.019207] [] ? mutex_lock_killable_nested+0x960/0x960 [ 113.019212] [] ? __fget+0x231/0x3b0 [ 113.019217] [] ? __fget+0x47/0x3b0 [ 113.019223] [] vfs_readv+0x84/0xc0 [ 113.019229] [] do_readv+0xe6/0x250 [ 113.019234] [] ? vfs_readv+0xc0/0xc0 [ 113.019241] [] SyS_readv+0x27/0x30 [ 113.019248] [] ? rw_copy_check_uvector+0x2c0/0x2c0 [ 113.019254] [] do_syscall_64+0x1a5/0x490 [ 113.019261] [] entry_SYSCALL_64_after_swapgs+0x47/0xc5 [ 113.019728] Dumping ftrace buffer: [ 113.019731] (ftrace buffer empty) [ 113.019735] Kernel Offset: disabled [ 113.529075] Rebooting in 86400 seconds..