INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.20' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 86.645324] ================================================================== [ 86.652710] BUG: KASAN: out-of-bounds in __unwind_start+0x37c/0x3c0 [ 86.659085] Read of size 8 at addr ffff8801c95af820 by task syzkaller369947/8238 [ 86.666584] [ 86.668184] CPU: 1 PID: 8238 Comm: syzkaller369947 Not tainted 4.9.95-gee0bcd6 #6 [ 86.675772] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 86.685097] ffff8801c966f770 ffffffff81eb0f89 ffffea0007256bc0 ffff8801c95af820 [ 86.693066] 0000000000000000 ffff8801c95af828 ffff8801c966f8a8 ffff8801c966f7a8 [ 86.701036] ffffffff815653cb ffff8801c95af820 0000000000000008 0000000000000000 [ 86.709007] Call Trace: [ 86.711567] [] dump_stack+0xc1/0x128 [ 86.716902] [] print_address_description+0x6c/0x234 [ 86.723534] [] kasan_report.cold.6+0x242/0x2fe [ 86.729736] [] ? __unwind_start+0x37c/0x3c0 [ 86.735676] [] __asan_report_load8_noabort+0x14/0x20 [ 86.742396] [] __unwind_start+0x37c/0x3c0 [ 86.748165] [] ? ptrace_may_access+0x24/0x50 [ 86.754191] [] __save_stack_trace+0x59/0xf0 [ 86.760129] [] save_stack_trace_tsk+0x48/0x70 [ 86.766242] [] proc_pid_stack+0x148/0x220 [ 86.772007] [] ? lock_trace+0xc0/0xc0 [ 86.777426] [] proc_single_show+0xfd/0x170 [ 86.783279] [] seq_read+0x4b6/0x12e0 [ 86.788612] [] ? seq_dentry+0x290/0x290 [ 86.794207] [] ? __fsnotify_update_child_dentry_flags.part.1+0x300/0x300 [ 86.802667] [] ? fsnotify+0x1100/0x1100 [ 86.808260] [] do_loop_readv_writev.part.18+0xd5/0x280 [ 86.815159] [] do_readv_writev+0x565/0x7a0 [ 86.821017] [] ? vfs_write+0x530/0x530 [ 86.826525] [] ? mark_held_locks+0xc7/0x130 [ 86.832465] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 86.839273] [] ? mutex_lock_nested+0x596/0x870 [ 86.845474] [] ? __fdget_pos+0xac/0xd0 [ 86.850980] [] ? __fget+0x20a/0x3b0 [ 86.856224] [] ? mutex_trylock+0x3e0/0x3e0 [ 86.862086] [] ? __fget+0x231/0x3b0 [ 86.867333] [] ? __fget+0x47/0x3b0 [ 86.872491] [] vfs_readv+0x84/0xc0 [ 86.877649] [] do_readv+0xe6/0x260 [ 86.882807] [] ? vfs_readv+0xc0/0xc0 [ 86.888140] [] SyS_readv+0x27/0x30 [ 86.893297] [] ? rw_copy_check_uvector+0x330/0x330 [ 86.899847] [] do_syscall_64+0x1a6/0x490 [ 86.905527] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 86.912419] [ 86.914017] The buggy address belongs to the page: [ 86.918914] page:ffffea0007256bc0 count:0 mapcount:0 mapping: (null) index:0x0 [ 86.927141] flags: 0x8000000000000000() [ 86.931082] page dumped because: kasan: bad access detected [ 86.936756] [ 86.938351] Memory state around the buggy address: [ 86.943269] ffff8801c95af700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 86.950597] ffff8801c95af780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 86.957926] >ffff8801c95af800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 86.965252] ^ [ 86.969888] ffff8801c95af880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 86.977222] ffff8801c95af900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 86.984547] ================================================================== [ 86.991870] Disabling lock debugging due to kernel taint [ 86.997438] Kernel panic - not syncing: panic_on_warn set ... [ 86.997438] [ 87.004788] CPU: 1 PID: 8238 Comm: syzkaller369947 Tainted: G B 4.9.95-gee0bcd6 #6 [ 87.013592] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.022916] ffff8801c966f6d0 ffffffff81eb0f89 ffffffff841c45f5 00000000ffffffff [ 87.030890] 0000000000000000 0000000000000001 ffff8801c966f8a8 ffff8801c966f790 [ 87.038861] ffffffff8141f945 0000000041b58ab3 ffffffff841b7cf8 ffffffff8141f786 [ 87.047089] Call Trace: [ 87.049649] [] dump_stack+0xc1/0x128 [ 87.054987] [] panic+0x1bf/0x3bc [ 87.059974] [] ? add_taint.cold.6+0x16/0x16 [ 87.065916] [] ? ___preempt_schedule+0x16/0x18 [ 87.072124] [] kasan_end_report+0x47/0x4f [ 87.077894] [] kasan_report.cold.6+0x76/0x2fe [ 87.084009] [] ? __unwind_start+0x37c/0x3c0 [ 87.089954] [] __asan_report_load8_noabort+0x14/0x20 [ 87.096677] [] __unwind_start+0x37c/0x3c0 [ 87.102448] [] ? ptrace_may_access+0x24/0x50 [ 87.108477] [] __save_stack_trace+0x59/0xf0 [ 87.114419] [] save_stack_trace_tsk+0x48/0x70 [ 87.120533] [] proc_pid_stack+0x148/0x220 [ 87.126299] [] ? lock_trace+0xc0/0xc0 [ 87.131719] [] proc_single_show+0xfd/0x170 [ 87.137573] [] seq_read+0x4b6/0x12e0 [ 87.142918] [] ? seq_dentry+0x290/0x290 [ 87.148512] [] ? __fsnotify_update_child_dentry_flags.part.1+0x300/0x300 [ 87.156970] [] ? fsnotify+0x1100/0x1100 [ 87.162563] [] do_loop_readv_writev.part.18+0xd5/0x280 [ 87.169458] [] do_readv_writev+0x565/0x7a0 [ 87.175312] [] ? vfs_write+0x530/0x530 [ 87.180817] [] ? mark_held_locks+0xc7/0x130 [ 87.186760] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 87.193571] [] ? mutex_lock_nested+0x596/0x870 [ 87.199773] [] ? __fdget_pos+0xac/0xd0 [ 87.205279] [] ? __fget+0x20a/0x3b0 [ 87.210523] [] ? mutex_trylock+0x3e0/0x3e0 [ 87.216385] [] ? __fget+0x231/0x3b0 [ 87.221632] [] ? __fget+0x47/0x3b0 [ 87.226798] [] vfs_readv+0x84/0xc0 [ 87.231959] [] do_readv+0xe6/0x260 [ 87.237119] [] ? vfs_readv+0xc0/0xc0 [ 87.242453] [] SyS_readv+0x27/0x30 [ 87.247615] [] ? rw_copy_check_uvector+0x330/0x330 [ 87.254162] [] do_syscall_64+0x1a6/0x490 [ 87.259854] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 87.267286] Dumping ftrace buffer: [ 87.270797] (ftrace buffer empty) [ 87.274475] Kernel Offset: disabled [ 87.278082] Rebooting in 86400 seconds..