diff options
| author | Zhang Yi <yi.zhang@huawei.com> | 2025-05-06 09:20:09 +0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2025-05-20 10:31:06 -0400 |
| commit | 1a77a028a392fab66dd637cdfac3f888450d00af (patch) | |
| tree | cb82b4f16f9e1a11f3148cede77eb4a22071f095 | |
| parent | dbe27f06fa38b9bfc598f8864ae1c5d5831d9992 (diff) | |
ext4: ensure i_size is smaller than maxbytes
The inode i_size cannot be larger than maxbytes, check it while loading
inode from the disk.
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Baokun Li <libaokun1@huawei.com>
Link: https://patch.msgid.link/20250506012009.3896990-4-yi.zhang@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
| -rw-r--r-- | fs/ext4/inode.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 01038b4ecee0..ca1f7a0dd8f8 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4966,7 +4966,8 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino, ei->i_file_acl |= ((__u64)le16_to_cpu(raw_inode->i_file_acl_high)) << 32; inode->i_size = ext4_isize(sb, raw_inode); - if ((size = i_size_read(inode)) < 0) { + size = i_size_read(inode); + if (size < 0 || size > ext4_get_maxbytes(inode)) { ext4_error_inode(inode, function, line, 0, "iget: bad i_size value: %lld", size); ret = -EFSCORRUPTED; |