The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 1a77a028a392fab66dd637cdfac3f888450d00af # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025062011-unaired-system-c935@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 1a77a028a392fab66dd637cdfac3f888450d00af Mon Sep 17 00:00:00 2001 From: Zhang Yi yi.zhang@huawei.com Date: Tue, 6 May 2025 09:20:09 +0800 Subject: [PATCH] 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

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;