6.12-stable review patch. If anyone has any objections, please let me know.
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From: Zhang Yi yi.zhang@huawei.com
commit 1a77a028a392fab66dd637cdfac3f888450d00af upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ext4/inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4928,7 +4928,8 @@ struct inode *__ext4_iget(struct super_b 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;