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 26b63bee2f6e711c5a169997fd126fddcfb90848 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025021019-constrain-diligent-85b6@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From 26b63bee2f6e711c5a169997fd126fddcfb90848 Mon Sep 17 00:00:00 2001 From: Wentao Liang vulab@iscas.ac.cn Date: Fri, 24 Jan 2025 11:45:09 +0800 Subject: [PATCH] xfs: Add error handling for xfs_reflink_cancel_cow_range

In xfs_inactive(), xfs_reflink_cancel_cow_range() is called without error handling, risking unnoticed failures and inconsistent behavior compared to other parts of the code.

Fix this issue by adding an error handling for the xfs_reflink_cancel_cow_range(), improving code robustness.

Fixes: 6231848c3aa5 ("xfs: check for cow blocks before trying to clear them") Cc: stable@vger.kernel.org # v4.17 Reviewed-by: Darrick J. Wong djwong@kernel.org Signed-off-by: Wentao Liang vulab@iscas.ac.cn Signed-off-by: Carlos Maiolino cem@kernel.org

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index c95fe1b1de4e..b1f9f156ec88 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -1404,8 +1404,11 @@ xfs_inactive( goto out;

/* Try to clean out the cow blocks if there are any. */ - if (xfs_inode_has_cow_data(ip)) - xfs_reflink_cancel_cow_range(ip, 0, NULLFILEOFF, true); + if (xfs_inode_has_cow_data(ip)) { + error = xfs_reflink_cancel_cow_range(ip, 0, NULLFILEOFF, true); + if (error) + goto out; + }

if (VFS_I(ip)->i_nlink != 0) { /*