FAILED: patch "[PATCH] xfs: allow softlimit with no hardlimit in quota scrub" failed to apply to 5.10-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.10-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-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x 342c2e00b3a99099a7088f7b8c8f075670c603a9
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026110443-mobile-krypton-9fb6@gregkh' --subject-prefix 'PATCH 5.10.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

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

From 342c2e00b3a99099a7088f7b8c8f075670c603a9 Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <djwong@kernel.org>
Date: Sun, 27 Sep 2026 23:17:38 -0700
Subject: [PATCH] xfs: allow softlimit with no hardlimit in quota scrub

LOLLM observes that the sysadmin can set a user's soft limit to a
nonzero value and the hard limit to zero, so those aren't corruptions.

Cc: stable@vger.kernel.org # v4.15
Fixes: c2fc338c87a31f ("xfs: scrub quota information")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Assisted-by: LOLLM # finding obvious bugs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

diff --git a/fs/xfs/scrub/quota.c b/fs/xfs/scrub/quota.c
index 8c6ba1240fd5..83092181b30d 100644
--- a/fs/xfs/scrub/quota.c
+++ b/fs/xfs/scrub/quota.c
@@ -182,21 +182,21 @@ xchk_quota_item(
 	 * suspect, which is why we flag it for review.
 	 *
 	 * Complain about corruption if the soft limit is greater than
-	 * the hard limit.
+	 * the hard limit and there's a hard limit set.
 	 */
 	if (dq->q_blk.hardlimit > mp->m_sb.sb_dblocks)
 		xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
-	if (dq->q_blk.softlimit > dq->q_blk.hardlimit)
+	if (dq->q_blk.hardlimit && dq->q_blk.softlimit > dq->q_blk.hardlimit)
 		xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
 
 	if (dq->q_ino.hardlimit > M_IGEO(mp)->maxicount)
 		xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
-	if (dq->q_ino.softlimit > dq->q_ino.hardlimit)
+	if (dq->q_ino.hardlimit && dq->q_ino.softlimit > dq->q_ino.hardlimit)
 		xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
 
 	if (dq->q_rtb.hardlimit > mp->m_sb.sb_rblocks)
 		xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
-	if (dq->q_rtb.softlimit > dq->q_rtb.hardlimit)
+	if (dq->q_rtb.hardlimit && dq->q_rtb.softlimit > dq->q_rtb.hardlimit)
 		xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
 
 	/* Check the resource counts. */
diff --git a/fs/xfs/scrub/quota_repair.c b/fs/xfs/scrub/quota_repair.c
index 74eb66f9b890..6a2b3271264c 100644
--- a/fs/xfs/scrub/quota_repair.c
+++ b/fs/xfs/scrub/quota_repair.c
@@ -193,17 +193,17 @@ xrep_quota_item(
 		goto out_unlock_dquot;
 
 	/* Check the limits. */
-	if (dq->q_blk.softlimit > dq->q_blk.hardlimit) {
+	if (dq->q_blk.hardlimit && dq->q_blk.softlimit > dq->q_blk.hardlimit) {
 		dq->q_blk.softlimit = dq->q_blk.hardlimit;
 		dirty = true;
 	}
 
-	if (dq->q_ino.softlimit > dq->q_ino.hardlimit) {
+	if (dq->q_ino.hardlimit && dq->q_ino.softlimit > dq->q_ino.hardlimit) {
 		dq->q_ino.softlimit = dq->q_ino.hardlimit;
 		dirty = true;
 	}
 
-	if (dq->q_rtb.softlimit > dq->q_rtb.hardlimit) {
+	if (dq->q_rtb.hardlimit && dq->q_rtb.softlimit > dq->q_rtb.hardlimit) {
 		dq->q_rtb.softlimit = dq->q_rtb.hardlimit;
 		dirty = true;
 	}