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| author | Theodore Ts'o <tytso@mit.edu> | 2009-11-23 01:48:34 (GMT) |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-11-23 01:48:34 (GMT) |
| commit | 1585d8d89ae1791d8f957731f5655700fbcc5664 (patch) | |
| tree | 9139a0e5dd10bfee5695e7cb4ca47e7677e5718c /fs/ext4 | |
| parent | 6eebee625544ac4ef1d805da942f463275bd6caa (diff) | |
| download | linux-1585d8d89ae1791d8f957731f5655700fbcc5664.tar.xz | |
ext4: add check for wraparound in ext4_data_block_valid()
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/block_validity.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c index dc79b75..4df8621 100644 --- a/fs/ext4/block_validity.c +++ b/fs/ext4/block_validity.c @@ -228,6 +228,7 @@ int ext4_data_block_valid(struct ext4_sb_info *sbi, ext4_fsblk_t start_blk, struct rb_node *n = sbi->system_blks.rb_node; if ((start_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) || + (start_blk + count < start_blk) || (start_blk + count > ext4_blocks_count(sbi->s_es))) return 0; while (n) { |