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(parent: b72143a) | patch
ext4: fix possible overflow in ext4_trim_fs()
authorLukas Czerner <lczerner@redhat.com>
Mon, 10 Jan 2011 17:04:55 +0000 (12:04 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Mon, 10 Jan 2011 17:04:55 +0000 (12:04 -0500)
commit4f531501e44206862735e81ddf2b70d0dcf6acf6
tree599648348e58760361dc4903e346a5f3f24175c0tree | snapshot (tar.gz zip)
parentb72143ab3ed566a12560fa4411a1f02c276dcc39commit | diff
ext4: fix possible overflow in ext4_trim_fs()

When determining last group through ext4_get_group_no_and_offset() the
result may be wrong in cases when range->start and range-len are too
big, because it may overflow when summing up those two numbers.

Fix that by checking range->len and limit its value to
ext4_blocks_count(). This commit was tested by myself with expected
result.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
fs/ext4/mballoc.c diff | blob | blame | history
Motorola kernel-slsi