[Bug 195561] Suspicious persistent EXT4-fs error: ext4_validate_block_bitmap:395: [Proc] bg 17: block 557056: invalid block bitmap

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https://bugzilla.kernel.org/show_bug.cgi?id=195561

--- Comment #27 from James tao (tao1hua@xxxxxxxxxx) ---
How was the sdcard formatted?
> sdcard formatted by make_ext4fs.

Can you give me a clean reproduction that doesn't involve using AOSP userspace?
> I had try the way you provided. but I can't access to the git
> server(git.kernel).

[taohua@ubuntu-bsp ext4_issue]git clone
git://git.kernel.org/pub/scm/fs/ext2/xfstests-bld.git fstests
Cloning into 'fstests'...
fatal: unable to connect to git.kernel.org:
git.kernel.org[0: 147.75.110.187]: errno=Connection timed out
git.kernel.org[1: 2604:1380:3000:3500::3]: errno=Network is unreachable

[taohua@ubuntu-bsp ext4_issue]ping git.kernel.org
PING pub.nrt.kernel.org (147.75.110.187) 56(84) bytes of data.
64 bytes from 147.75.110.187: icmp_req=1 ttl=53 time=57.2 ms
64 bytes from 147.75.110.187: icmp_req=2 ttl=53 time=57.1 ms
64 bytes from 147.75.110.187: icmp_req=3 ttl=53 time=57.1 ms

Another way, I have try to run only linux (not Android) on the Broadcom ARM
chipset. and using the same kernel version. the test step as follow.
   1. mkfs.ext4 /dev/mmcblk0                     #format tf card as ext4
   2. mount -t ext4 /dev/mmcblk0 /mnt/hd/        #mount tf card
   3. mount -t ext4 /dev/mmcblk1p14 /mnt/flash/  # mount emmc partition as ext4
   4. cp /mnt/flash/*.data /mnt/hd/              #copy data to tf card

  # df
  Filesystem           1K-blocks      Used Available Use% Mounted on
  rootfs                  106944     10480     96464  10% /
  none                    106944         0    106944   0% /dev
  tmpfs                   118076         8    118068   0% /tmp
  shm                     118076         0    118076   0% /dev/shm
  /dev/mmcblk0           7381352   3124064   3859288  45% /mnt/hd
  /dev/mmcblk1p14        4536544   3116564   1166492  73% /mnt/flash

By the test in the same hardware everything looks good. Is it not an ext4
issue, but a issue of make_ext4fs?

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