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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-12-06 15:59:01 -0800 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2016-12-07 13:03:31 +0100 |
| commit | b46dc033818d3293ecc49dc258e2efb603c80bd7 (patch) | |
| tree | 7ee990bb6aa76991c41d09c3a2a86c4f1acb611c | |
| parent | c3b004460d77bf3f980d877be539016f2df4df12 (diff) | |
| download | linux-b46dc033818d3293ecc49dc258e2efb603c80bd7.tar.bz2 | |
ext2: reject inodes with negative size
Don't load an inode with a negative size; this causes integer overflow
problems in the VFS.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
| -rw-r--r-- | fs/ext2/inode.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 41b8b44a391c..01f6d4be7f9a 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -1476,6 +1476,10 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino) inode->i_size |= ((__u64)le32_to_cpu(raw_inode->i_size_high)) << 32; else ei->i_dir_acl = le32_to_cpu(raw_inode->i_dir_acl); + if (i_size_read(inode) < 0) { + ret = -EFSCORRUPTED; + goto bad_inode; + } ei->i_dtime = 0; inode->i_generation = le32_to_cpu(raw_inode->i_generation); ei->i_state = 0; |