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| author | Kinglong Mee <kinglongmee@gmail.com> | 2017-03-15 21:12:50 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-05-08 16:24:06 -0700 |
| commit | 96d73c33c4a3749d1d2b654313bcc98db0156cd1 (patch) | |
| tree | 53e0e95e008fe93cf78d38f17cf515b970c6bcf0 /fs | |
| parent | 27eff7f2f11c6abb30bc338b70bb960fa8ace1a0 (diff) | |
f2fs: sanity check of crc_offset from raw checkpoint
The crc_offset towards or beyond the end of block is wrong,
sanity check it.
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 61c519688f9d..afe4616af025 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -679,7 +679,7 @@ static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr, *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page); crc_offset = le32_to_cpu((*cp_block)->checksum_offset); - if (crc_offset >= blk_size) { + if (crc_offset > (blk_size - sizeof(__le32))) { f2fs_msg(sbi->sb, KERN_WARNING, "invalid crc_offset: %zu", crc_offset); return -EINVAL; |