tree 765666fd6d389929f1b6c7da4593d0b064562414
parent fb203751099eecf145317685ee480a51e5b246de
author Jan Kara <jack@suse.cz> 1554589986 -0400
committer Theodore Ts'o <tytso@mit.edu> 1554589986 -0400

ext4: make sanity check in mballoc more strict

The sanity check in mb_find_extent() only checked that returned extent
does not extend past blocksize * 8, however it should not extend past
EXT4_CLUSTERS_PER_GROUP(sb). This can happen when clusters_per_group <
blocksize * 8 and the tail of the bitmap is not properly filled by 1s
which happened e.g. when ancient kernels have grown the filesystem.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org