+ ocfs2-fix-panic-in-failed-foilio-allocation.patch added to mm-hotfixes-unstable branch

+ ocfs2-fix-panic-in-failed-foilio-allocation.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: ocfs2: fix panic in failed foilio allocation
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     ocfs2-fix-panic-in-failed-foilio-allocation.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ocfs2-fix-panic-in-failed-foilio-allocation.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Mark Tinguely <mark.tinguely@oracle.com>
Subject: ocfs2: fix panic in failed foilio allocation
Date: Thu, 10 Apr 2025 14:56:11 -0500

In commit 7e119cff9d0a ("ocfs2: convert w_pages to w_folios") the chunk
page allocations became order 0 folio allocations.  If an allocation
failed, the folio array entry should be NULL so the error path can skip
the entry.  In the port it is -ENOMEM and the error path panics trying to
free this bad value.

Link: https://lkml.kernel.org/r/150746ad-32ae-415e-bf1d-6dfd195fbb65@oracle.com
Fixes: 7e119cff9d0a ("ocfs2: convert w_pages to w_folios")
Signed-off-by: Mark Tinguely <mark.tinguely@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/ocfs2/aops.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/ocfs2/aops.c~ocfs2-fix-panic-in-failed-foilio-allocation
+++ a/fs/ocfs2/aops.c
@@ -1071,6 +1071,7 @@ static int ocfs2_grab_folios_for_write(s
 			if (IS_ERR(wc->w_folios[i])) {
 				ret = PTR_ERR(wc->w_folios[i]);
 				mlog_errno(ret);
+				wc->w_folios[i] = NULL;
 				goto out;
 			}
 		}
_

Patches currently in -mm which might be from mark.tinguely@oracle.com are

ocfs2-fix-panic-in-failed-foilio-allocation.patch
v2-ocfs2-fix-panic-in-failed-foilio-allocation.patch