+ ocfs2-use-kzalloc-for-quota-recovery-bitmap-allocation.patch added to mm-nonmm-unstable branch

+ ocfs2-use-kzalloc-for-quota-recovery-bitmap-allocation.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: ocfs2: use kzalloc for quota recovery bitmap allocation
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     ocfs2-use-kzalloc-for-quota-recovery-bitmap-allocation.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ocfs2-use-kzalloc-for-quota-recovery-bitmap-allocation.patch

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

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------------------------------------------------------
From: Tristan Madani <tristan@talencesecurity.com>
Subject: ocfs2: use kzalloc for quota recovery bitmap allocation
Date: Sat, 18 Apr 2026 13:10:48 +0000

ocfs2 quota recovery allocates a bitmap buffer with kmalloc and does not
fully initialize it.  This can lead to use of uninitialized bits during
quota recovery from a corrupted filesystem image.

Use kzalloc instead to ensure the bitmap is zero-initialized.

Link: https://lore.kernel.org/20260418131048.1052507-1-tristmd@gmail.com
Reported-by: syzbot+7ea0b96c4ddb49fd1a70@syzkaller.appspotmail.com
Signed-off-by: Tristan Madani <tristan@talencesecurity.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Heming Zhao <heming.zhao@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/ocfs2/quota_local.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/ocfs2/quota_local.c~ocfs2-use-kzalloc-for-quota-recovery-bitmap-allocation
+++ a/fs/ocfs2/quota_local.c
@@ -302,7 +302,7 @@ static int ocfs2_add_recovery_chunk(stru
 	if (!rc)
 		return -ENOMEM;
 	rc->rc_chunk = chunk;
-	rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
+	rc->rc_bitmap = kzalloc(sb->s_blocksize, GFP_NOFS);
 	if (!rc->rc_bitmap) {
 		kfree(rc);
 		return -ENOMEM;
_

Patches currently in -mm which might be from tristan@talencesecurity.com are

ocfs2-use-kzalloc-for-quota-recovery-bitmap-allocation.patch