diff options
| author | Chao Yu <yuchao0@huawei.com> | 2017-01-25 10:52:39 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-02-06 14:36:22 -0800 |
| commit | d27bebf86574c0edbbf7d17dfd6568ba72c752c7 (patch) | |
| tree | dad157464249e78d44dff614c0bfc8a163682c10 /fs | |
| parent | 21980a25e7276552f4923089dc28bb9af9024e9d (diff) | |
f2fs: fix to avoid overflow when left shifting page offset
We use following method to calculate size with current page index:
size = index << PAGE_SHIFT
If type of index has only 32-bits size, left shifting will incur overflow,
which makes result incorrect.
So let's cast index with 64-bits type to avoid such issue.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/recovery.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c index 4fb4471a3206..e93316ea8d1b 100644 --- a/fs/f2fs/recovery.c +++ b/fs/f2fs/recovery.c @@ -428,8 +428,9 @@ retry_dn: } if (!file_keep_isize(inode) && - (i_size_read(inode) <= (start << PAGE_SHIFT))) - f2fs_i_size_write(inode, (start + 1) << PAGE_SHIFT); + (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT))) + f2fs_i_size_write(inode, + (loff_t)(start + 1) << PAGE_SHIFT); /* * dest is reserved block, invalidate src block |