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| author | Chao Yu <yuchao0@huawei.com> | 2017-01-25 05:52:39 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-02-23 07:24:51 +0300 |
| commit | dba79f38bc60d98b605bdbbf5613aa3fb8f8ff7c (patch) | |
| tree | dfbba41ac9cfc88c2e20e32b41a857dba6357c07 /fs/f2fs | |
| parent | ba38c27eb93e2d36bf940ca65c145f6e2aaa6d5c (diff) | |
| download | linux-dba79f38bc60d98b605bdbbf5613aa3fb8f8ff7c.tar.xz | |
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/f2fs')
| -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 |