diff options
| author | Colin Ian King <colin.king@canonical.com> | 2013-10-24 14:08:07 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-13 12:08:08 +0900 |
| commit | 5ca6a948fb97c27ae9f352c254063f7fe342d30c (patch) | |
| tree | 41a1a8d59743087585d949ee695383a1c9e757d1 /fs | |
| parent | ff2d90ef8a5f51c8aceb61156fd276da36eb158f (diff) | |
eCryptfs: fix 32 bit corruption issue
commit 43b7c6c6a4e3916edd186ceb61be0c67d1e0969e upstream.
Shifting page->index on 32 bit systems was overflowing, causing
data corruption of > 4GB files. Fix this by casting it first.
https://launchpad.net/bugs/1243636
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reported-by: Lars Duesing <lars.duesing@camelotsweb.de>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ecryptfs/crypto.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index d10757635b9c..40db6880cdd6 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -408,7 +408,7 @@ static loff_t lower_offset_for_page(struct ecryptfs_crypt_stat *crypt_stat, struct page *page) { return ecryptfs_lower_header_size(crypt_stat) + - (page->index << PAGE_CACHE_SHIFT); + ((loff_t)page->index << PAGE_CACHE_SHIFT); } /** |