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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-11-28 12:44:05 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-12-23 10:18:04 +0900 |
| commit | f9a4e6df52edf8ce1040d1b8d340d31234a1bce3 (patch) | |
| tree | 582de93c164bba60633884bc3834d546da5cb529 /fs/f2fs/checkpoint.c | |
| parent | 36795567942a033ef9e22d8eba86396ffb9aa80c (diff) | |
| download | linux-f9a4e6df52edf8ce1040d1b8d340d31234a1bce3.tar.bz2 | |
f2fs: bug fix on bit overflow from 32bits to 64bits
This patch fixes some bit overflows by the shift operations.
Dan Carpenter reported potential bugs on bit overflows as follows.
fs/f2fs/segment.c:910 submit_write_page()
warn: should 'blk_addr << ((sbi)->log_blocksize - 9)' be a 64 bit type?
fs/f2fs/checkpoint.c:429 get_valid_checkpoint()
warn: should '1 << ()' be a 64 bit type?
fs/f2fs/data.c:408 f2fs_readpage()
warn: should 'blk_addr << ((sbi)->log_blocksize - 9)' be a 64 bit type?
fs/f2fs/data.c:457 submit_read_page()
warn: should 'blk_addr << ((sbi)->log_blocksize - 9)' be a 64 bit type?
fs/f2fs/data.c:525 get_data_block_ro()
warn: should 'i << blkbits' be a 64 bit type?
Bug-Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/checkpoint.c')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 3e62987e333a..21e721534965 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -426,7 +426,8 @@ int get_valid_checkpoint(struct f2fs_sb_info *sbi) cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version); /* The second checkpoint pack should start at the next segment */ - cp_start_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg); + cp_start_blk_no += ((unsigned long long)1) << + le32_to_cpu(fsb->log_blocks_per_seg); cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version); if (cp1 && cp2) { |