ext4: don't allow r/w mounts if metadata blocks overlap the superblock

Browse source

commit 18db4b4e6f upstream.

If some metadata block, such as an allocation bitmap, overlaps the
superblock, it's very likely that if the file system is mounted
read/write, the results will not be pretty.  So disallow r/w mounts
for file systems corrupted in this particular way.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Theodore Ts'o 2018-03-29 22:10:35 -04:00 • committed by Greg Kroah-Hartman

parent 26dbb30c58

commit b2623d8166

1 changed files with 6 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

fs/ext4/super.c

View file