From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 9C29424679C; Mon, 23 Jun 2025 13:33:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750685608; cv=none; b=bNKQspeOYwhjyfYwFGLwkExRCnRox0CWp8VpRPB4XsamR/7hWcJLGm2uW+MhyNrWQpUkA4GfPuWOzwioyWxnX+P1FIBQluMm7zCk0iVTPHU8lHcCk5rXW6GP3nS4YeyuvujFWv8VCUaEC0Fovvht00+StxgVIA4tdcLyitNef2g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750685608; c=relaxed/simple; bh=DND0M6G1JS1/R+rhKdM25mTxoBs7cqI0ABdmS1LcmDQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FB7Xj2QQiNmgWmvExvj9876aMQn6kwNpxZzFzHvtoZ2Da77y8QUyTF/8c0Pw+djiXQZqKyz8NxEF4MqyebbbWZEDHgJ0w1TLr4Nr3BDjy5aNABKYz+REAafNO+2aU8LIEtN7C2U0s7OqPicZMRKhHKzbDdcPzsnbLIyQWHYH2NA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=STMjzRNV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="STMjzRNV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2F43CC4CEEA; Mon, 23 Jun 2025 13:33:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750685608; bh=DND0M6G1JS1/R+rhKdM25mTxoBs7cqI0ABdmS1LcmDQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=STMjzRNV5z8paum3RaBBYhhnIyymp+7ZgTdwleX5pjK+ST/k00P8A1fKDQ51MRliu qseXhElD4nUViiY54ouECX6HGjOkQy7EiMDQxpMHwXnuDSzlMVdzsqje0oEn23/r5i 4XFCOIyJ9fTwkzUgJvfrG3d1fEUm2fANIBs8Ki/4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jianzhou Zhao , Namjae Jeon , Sasha Levin Subject: [PATCH 6.15 247/592] exfat: fix double free in delayed_free Date: Mon, 23 Jun 2025 15:03:25 +0200 Message-ID: <20250623130706.168825156@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130700.210182694@linuxfoundation.org> References: <20250623130700.210182694@linuxfoundation.org> User-Agent: quilt/0.68 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 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Namjae Jeon [ Upstream commit 1f3d9724e16d62c7d42c67d6613b8512f2887c22 ] The double free could happen in the following path. exfat_create_upcase_table() exfat_create_upcase_table() : return error exfat_free_upcase_table() : free ->vol_utbl exfat_load_default_upcase_table : return error exfat_kill_sb() delayed_free() exfat_free_upcase_table() <--------- double free This patch set ->vol_util as NULL after freeing it. Reported-by: Jianzhou Zhao Signed-off-by: Namjae Jeon Signed-off-by: Sasha Levin --- fs/exfat/nls.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c index d47896a895965..1729bf42eb516 100644 --- a/fs/exfat/nls.c +++ b/fs/exfat/nls.c @@ -801,4 +801,5 @@ int exfat_create_upcase_table(struct super_block *sb) void exfat_free_upcase_table(struct exfat_sb_info *sbi) { kvfree(sbi->vol_utbl); + sbi->vol_utbl = NULL; } -- 2.39.5