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| author | Theodore Ts'o <tytso@mit.edu> | 2018-07-09 02:35:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-09 13:17:59 +0300 |
| commit | 9bf8d5bf50510a6898943dbb397b7cb529301614 (patch) | |
| tree | eadd96a52abb459d67c3f43b7d2b9ac6f7a1cceb /drivers | |
| parent | c68c772262d9b460ddd1b1d68e06ebe3254d0ead (diff) | |
| download | linux-9bf8d5bf50510a6898943dbb397b7cb529301614.tar.xz | |
ext4: fix false negatives *and* false positives in ext4_check_descriptors()
commit 44de022c4382541cebdd6de4465d1f4f465ff1dd upstream.
Ext4_check_descriptors() was getting called before s_gdb_count was
initialized. So for file systems w/o the meta_bg feature, allocation
bitmaps could overlap the block group descriptors and ext4 wouldn't
notice.
For file systems with the meta_bg feature enabled, there was a
fencepost error which would cause the ext4_check_descriptors() to
incorrectly believe that the block allocation bitmap overlaps with the
block group descriptor blocks, and it would reject the mount.
Fix both of these problems.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Gilbert <bgilbert@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions