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| author | Colin Ian King <colin.king@canonical.com> | 2013-10-24 14:08:07 +0000 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@canonical.com> | 2013-10-24 12:36:30 -0700 |
| commit | 43b7c6c6a4e3916edd186ceb61be0c67d1e0969e (patch) | |
| tree | 422f444513a00a3f6d336ec448af816e1e45180a /fs/ecryptfs | |
| parent | 3edc8376c06133e3386265a824869cad03a4efd4 (diff) | |
| download | lwn-43b7c6c6a4e3916edd186ceb61be0c67d1e0969e.tar.gz lwn-43b7c6c6a4e3916edd186ceb61be0c67d1e0969e.zip | |
eCryptfs: fix 32 bit corruption issue
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>
Cc: stable@vger.kernel.org # v3.11+
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Diffstat (limited to 'fs/ecryptfs')
| -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 c88e355f7635..000eae2782b6 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); } /** |