From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 808BE430CDC; Tue, 21 Jul 2026 19:55:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784663751; cv=none; b=die96Fqe1YFVSlSaENgzoRgB1KUph/gQHEPRE0BYRju9TubJA4k/IghuCtDnACrN/ujUAIDBDfQqwGITlu/CvCWhQ6OT+GTC6mMrZMlxr0agrKESPB5WhAcYVm1hwrEIcC5J+QPupz10mvedxkIiLnlo6/PeOTrPOIJyN5cDbwE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784663751; c=relaxed/simple; bh=WM5VUh/1EyGOYXkGekAnovpe69FUgZedWFp20vkJW5c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=L/LLsIOS5NPj/JvJWla0pmqPK7+rtiff81OdwD0GTJIPhcIwHUUFindUm87stBxmp8JLm0PcXHpgC2JRh4We/lznlv7CCKlFPU6/91sG0aDe/pPE0AVld12kY2tupKbRH1zcgeU6b9mWNFQADRwgx6IPnYkzlzmS0YYoGdYoyFM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cq1odHRM; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="cq1odHRM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EDE0D1F000E9; Tue, 21 Jul 2026 19:55:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784663750; bh=KbmaJBa6eYh/LwxkWCM3eD6o3kQcwRNYbsJvnkl8VXM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=cq1odHRMYylYcKji9s9dlMS+Nr9TwU82JFJKxXwTyMDu00EZpN3SHgav/OAFjjQU0 DlUy9x1PzuMyf3c8wM7F5guSJzDez+6ePV41pRdUkOFuTY2N8r2iapYrE1aXG3IWy/ U8PGxh6QhVRR/pnipiqwcslXtBGybFwGFdSndSm0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+7ea0b96c4ddb49fd1a70@syzkaller.appspotmail.com, Tristan Madani , Joseph Qi , Mark Fasheh , Joel Becker , Junxiao Bi , Changwei Ge , Jun Piao , Heming Zhao , Andrew Morton Subject: [PATCH 6.12 0941/1276] ocfs2: use kzalloc for quota recovery bitmap allocation Date: Tue, 21 Jul 2026 17:23:04 +0200 Message-ID: <20260721152507.089674420@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152446.065700225@linuxfoundation.org> References: <20260721152446.065700225@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tristan Madani commit 93c8c6ea90be9e9df8fe14048ad4e3caad0770a6 upstream. 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 Reviewed-by: Joseph Qi Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Changwei Ge Cc: Jun Piao Cc: Heming Zhao Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- fs/ocfs2/quota_local.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/ocfs2/quota_local.c +++ b/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;