tree dcd2f95c9f73ffb8d2020fe89bb1c30785e0fa78
parent 38d726d153cfe5efe5fe22d28d36ab382dda3a5c
author Theodore Ts'o <tytso@mit.edu> 1240447945 -0400
committer Theodore Ts'o <tytso@mit.edu> 1240447945 -0400

ext4: Make the extent validity check more paranoid

Instead of just checking that the extent block number is greater or
equal than s_first_data_block, make sure it it is not pointing into
the block group descriptors, since that is clearly wrong.  This helps
prevent filesystem from getting very badly corrupted in case an extent
block is corrupted.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>