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(parent: 03b40e3) | patch
ext4: fix corruption when online resizing a fs with 1K block size
authorMaarten ter Huurne <maarten@treewalker.org>
Mon, 1 Jul 2013 12:12:08 +0000 (08:12 -0400)
committerTheodore Ts'o <tytso@mit.edu>
Mon, 1 Jul 2013 12:12:08 +0000 (08:12 -0400)
commit6ca792edc13c409e8d4eb9001e048264c6a2eb64
treed4f2cb0ece2d3ebf8cbbd982a5238b3a08978a65tree | snapshot
parent03b40e349695dc700582568e5b410a89058f707ecommit | diff
ext4: fix corruption when online resizing a fs with 1K block size

Subtracting the number of the first data block places the superblock
backups one block too early, corrupting the file system. When the block
size is larger than 1K, the first data block is 0, so the subtraction
has no effect and no corruption occurs.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
CC: stable@vger.kernel.org
fs/ext4/resize.c diff | blob | history
Domain: System / Kernel;