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Message-ID: <20250506012009.3896990-4-yi.zhang@huaweicloud.com> Date: Tue, 6 May 2025 09:20:09 +0800 From: Zhang Yi <yi.zhang@...weicloud.com> To: linux-ext4@...r.kernel.org Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, tytso@....edu, adilger.kernel@...ger.ca, jack@...e.cz, wanghaichi0403@...il.com, yi.zhang@...wei.com, yi.zhang@...weicloud.com, libaokun1@...wei.com, yukuai3@...wei.com, yangerkun@...wei.com Subject: [PATCH v2 4/4] ext4: ensure i_size is smaller than maxbytes From: Zhang Yi <yi.zhang@...wei.com> The inode i_size cannot be larger than maxbytes, check it while loading inode from the disk. Signed-off-by: Zhang Yi <yi.zhang@...wei.com> Reviewed-by: Jan Kara <jack@...e.cz> --- fs/ext4/inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 5691966a19e1..072b61140d12 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4922,7 +4922,8 @@ 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; -- 2.46.1
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