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| author | Kinglong Mee <kinglongmee@gmail.com> | 2017-03-15 21:12:50 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-03-21 22:34:34 -0400 |
| commit | c6f89dfd528041de2e71788495579a18c0363869 (patch) | |
| tree | 1705c386e00b73c1a1c6325eeb8eec0c86b1fe50 /fs/f2fs | |
| parent | d03ba4cc3fa639916a86b61c5a3d817cb6aa91a0 (diff) | |
| download | linux-stable-c6f89dfd528041de2e71788495579a18c0363869.tar.gz linux-stable-c6f89dfd528041de2e71788495579a18c0363869.tar.bz2 linux-stable-c6f89dfd528041de2e71788495579a18c0363869.zip | |
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/f2fs')
| -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 22348c7df67d..7dd7dd5914c5 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -678,7 +678,7 @@ 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; |