tree e2a78e2ba45bf86d738e409ee1573822ddc36a11
parent 08db141b5313ac2f64b844fb5725b8d81744b417
author Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com> 1498264641 -0300
committer Jan Kara <jack@suse.cz> 1499946308 +0200

ext2: Fix memory leak when truncate races ext2_get_blocks

Buffer heads referencing indirect blocks may not be released if the file
is truncated at the right time. This happens because ext2_get_branch()
returns NULL when it finds the whole chain of indirect blocks already
set, and when truncate alters the chain this value of NULL is
treated as the address of the last head to be released. Handle this in the
same way as it's done after the got_it label.

Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>