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authorChao Yu <chao2.yu@samsung.com>2014-05-28 02:56:09 +0200
committerJaegeuk Kim <jaegeuk@kernel.org>2014-06-04 06:34:30 +0200
commitbfec07d0f8ed78b10df3ca3bc23e27de1166ea45 (patch)
treec6134dfc647176474944cbb244bd15de4d4607ac /fs/hpfs/map.c
parentf2fs: fix recursive lock by f2fs_setxattr (diff)
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f2fs: avoid overflow when large directory feathure is enabled
When large directory feathure is enable, We have one case which could cause overflow in dir_buckets() as following: special case: level + dir_level >= 32 and level < MAX_DIR_HASH_DEPTH / 2. Here we define MAX_DIR_BUCKETS to limit the return value when the condition could trigger potential overflow. Changes from V1 o modify description of calculation in f2fs.txt suggested by Changman Lee. Suggested-by: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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