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authorTheodore Ts'o <tytso@mit.edu>2013-03-11 23:39:59 -0400
committerTheodore Ts'o <tytso@mit.edu>2013-03-11 23:39:59 -0400
commit90ba983f6889e65a3b506b30dc606aa9d1d46cd2 (patch)
tree964ad0ccf415e73a7760b5bfe65506f5d825e1cf /fs/ext4/mballoc.h
parentad56edad089b56300fd13bb9eeb7d0424d978239 (diff)
ext4: use atomic64_t for the per-flexbg free_clusters count
A user who was using a 8TB+ file system and with a very large flexbg size (> 65536) could cause the atomic_t used in the struct flex_groups to overflow. This was detected by PaX security patchset: http://forums.grsecurity.net/viewtopic.php?f=3&t=3289&p=12551#p12551 This bug was introduced in commit 9f24e4208f7e, so it's been around since 2.6.30. :-( Fix this by using an atomic64_t for struct orlav_stats's free_clusters. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Lukas Czerner <lczerner@redhat.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/ext4/mballoc.h')
0 files changed, 0 insertions, 0 deletions