EXT4-fs (sda1): Ignoring removed nobh option
EXT4-fs (sda1): Ignoring removed mblk_io_submit option
==================================================================
BUG: KASAN: use-after-free in memset include/linux/string.h:330 [inline]
BUG: KASAN: use-after-free in __ext4_expand_extra_isize+0x178/0x240 fs/ext4/inode.c:5769
EXT4-fs (sda1): re-mounted. Opts: i_version,nouid32,debug_want_extra_isize=8536059,nobh,block_validity,mblk_io_submit,
Write of size 8536027 at addr ffff8801bc1e61a0 by task rs:main Q:Reg/4354
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b


CPU: 1 PID: 1 Comm: init Not tainted 4.16.0+ #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:183
 find_child_reaper kernel/exit.c:578 [inline]
 forget_original_parent.cold.19+0x7b/0xd5 kernel/exit.c:670
 exit_notify kernel/exit.c:706 [inline]
 do_exit+0x1b58/0x2730 kernel/exit.c:885
 do_group_exit+0x16f/0x430 kernel/exit.c:968
 get_signal+0x886/0x1960 kernel/signal.c:2469
 do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810
 exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162
 prepare_exit_to_usermode+0x32e/0x390 arch/x86/entry/common.c:196
 retint_user+0x8/0x18
RIP: 0033:0x404a40
RSP: 002b:00007fffb00a4978 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 00007fffb00a50d0 RCX: ffffffffffffff00
RDX: 00007fffb00a4980 RSI: 00007fffb00a4ab0 RDI: 000000000000000b
RBP: 00007fffb00a5280 R08: 00007fffb00a5300 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00007fffb00a5660 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 4354 Comm: rs:main Q:Reg Not tainted 4.16.0+ #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0xac/0x2f5 mm/kasan/report.c:412
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267
 memset+0x23/0x40 mm/kasan/kasan.c:285
 memset include/linux/string.h:330 [inline]
 __ext4_expand_extra_isize+0x178/0x240 fs/ext4/inode.c:5769
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5821 [inline]
 ext4_mark_inode_dirty+0x72f/0xb20 fs/ext4/inode.c:5897
 ext4_dirty_inode+0x97/0xc0 fs/ext4/inode.c:5931
 __mark_inode_dirty+0x811/0x1530 fs/fs-writeback.c:2128
 generic_update_time+0x255/0x420 fs/inode.c:1657
 update_time fs/inode.c:1673 [inline]
 file_update_time+0x384/0x640 fs/inode.c:1884
 __generic_file_write_iter+0x1dc/0x5e0 mm/filemap.c:3213
 ext4_file_write_iter+0x6dc/0x12e0 fs/ext4/file.c:266
 call_write_iter include/linux/fs.h:1782 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x5bc/0x880 fs/read_write.c:487
 vfs_write+0x1f8/0x560 fs/read_write.c:549
 ksys_write+0xf9/0x250 fs/read_write.c:598
 SYSC_write fs/read_write.c:610 [inline]
 SyS_write+0x24/0x30 fs/read_write.c:607
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f7a7f23619d
RSP: 002b:00007f7a7d7d7000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000000000c6 RCX: 00007f7a7f23619d
RDX: 00000000000000c6 RSI: 0000000000c3e340 RDI: 0000000000000006
RBP: 0000000000c3e340 R08: 0000000000c3e3f6 R09: 3020392020727041
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f7a7d7d7480 R14: 0000000000000002 R15: 0000000000c3e140

The buggy address belongs to the page:
page:ffffea0006f07980 count:2 mapcount:0 mapping:ffff8801d5331ca0 index:0x4a6
flags: 0x2fffc0000001074(referenced|dirty|lru|active|private)
raw: 02fffc0000001074 ffff8801d5331ca0 00000000000004a6 00000002ffffffff
raw: ffffea0006eba9e0 ffffea0006e754e0 ffff8801b1b789d8 ffff8801d9e30b40
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8801d9e30b40

Memory state around the buggy address:
 ffff8801bc1ebf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801bc1ebf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801bc1ec000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8801bc1ec080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8801bc1ec100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..