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| author | Daeho Jeong <daehojeong@google.com> | 2020-08-31 03:24:01 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-09-11 21:11:25 +0300 |
| commit | 4eda1682cd0bf4a300d0b4e3ce2187dd8fccafde (patch) | |
| tree | b25b02f457c89280bd9b5996c465693f7758b10d /fs/f2fs/data.c | |
| parent | aad1383cbf08c87f29f5dba1622e122717fbc32a (diff) | |
| download | linux-4eda1682cd0bf4a300d0b4e3ce2187dd8fccafde.tar.xz | |
f2fs: add block address limit check to compressed file
Need to add block address range check to compressed file case and
avoid calling get_data_block_bmap() for compressed file.
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/data.c')
| -rw-r--r-- | fs/f2fs/data.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index a490e1b21930..c31ec408bd4f 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1803,10 +1803,6 @@ static int get_data_block_dio(struct inode *inode, sector_t iblock, static int get_data_block_bmap(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { - /* Block number less than F2FS MAX BLOCKS */ - if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) - return -EFBIG; - return __get_data_block(inode, iblock, bh_result, create, F2FS_GET_BLOCK_BMAP, NULL, NO_CHECK_TYPE, create); @@ -3813,11 +3809,16 @@ static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) filemap_write_and_wait(mapping); - if (f2fs_compressed_file(inode)) - blknr = f2fs_bmap_compress(inode, block); + /* Block number less than F2FS MAX BLOCKS */ + if (unlikely(block >= F2FS_I_SB(inode)->max_file_blocks)) + goto out; - if (!get_data_block_bmap(inode, block, &tmp, 0)) - blknr = tmp.b_blocknr; + if (f2fs_compressed_file(inode)) { + blknr = f2fs_bmap_compress(inode, block); + } else { + if (!get_data_block_bmap(inode, block, &tmp, 0)) + blknr = tmp.b_blocknr; + } out: trace_f2fs_bmap(inode, block, blknr); return blknr; |