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| author | Chao Yu <chao2.yu@samsung.com> | 2015-09-11 08:43:52 +0200 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-10-10 01:20:50 +0200 |
| commit | 9edcdabf36422d15d01db73b0fa5487e418beff6 (patch) | |
| tree | 0a0cf8522db1e617ef6cf9379ae9b5fd89e8a3bd /fs/f2fs/extent_cache.c | |
| parent | f2fs: fix incorrect searching position when shrinking extent cache (diff) | |
| download | linux-9edcdabf36422d15d01db73b0fa5487e418beff6.tar.xz linux-9edcdabf36422d15d01db73b0fa5487e418beff6.zip | |
f2fs: fix overflow of size calculation
We have potential overflow issue when calculating size of object, when
we left shift index with PAGE_CACHE_SHIFT bits, if type of index has only
32-bits space in 32-bit architecture, left shifting will incur overflow,
i.e:
pgoff_t index = 0xFFFFFFFF;
loff_t size = index << PAGE_CACHE_SHIFT;
size: 0xFFFFF000
So we should cast index with 64-bits type to avoid this issue.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/extent_cache.c')
0 files changed, 0 insertions, 0 deletions