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 36A9B220686; Mon, 23 Jun 2025 21:55:34 +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=1750715734; cv=none; b=d7keOz7Dked7W6AI9pu3/FngkkijY+zleMFbeaPNyv3DXFVhQBZBNGmKixWknvtveLlvP4XHRv3uLQkyjWU5gJmbcawxj6FvTk/+i33huDMivCBoIQjOM6BJ9W6nhJyC8LaSjF/PZcbQjcEgSzD4L/5liBYFn351wDJv09y4k80= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750715734; c=relaxed/simple; bh=sFwoE58H7Xc1+bgGM81akl5Swk6XOiAE9H4bjEBhZ8c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HI0nMkX6Bh7xvhsawMmJwaBwO1juAcGddzcn7eRp9Fy6kR+UhB9HimnvoTQWz1U8b8+djWf/hlq/kfLeAM4v+l9wiUAI7p3kzGLXh0Lp+X06wxTk98eRgOK5lrZeZ6WUnntyO2g1UB+1nvK+hwsvJH+p/gMnr+FqTtY3cpm7FdE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2hScxGwE; 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="2hScxGwE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2CFCC4CEEA; Mon, 23 Jun 2025 21:55:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750715734; bh=sFwoE58H7Xc1+bgGM81akl5Swk6XOiAE9H4bjEBhZ8c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2hScxGwEFXK5ii+HjJRTjbUhm8QBwcN4Ihj1BMmQ5R+ILakoKuPIxJ9Xc5eBHlDU8 bmlCGLKYLkvPNwpgd+YQ8jC7R746c9IkJUT1QX9FRutpUXYVTAznz4yg2rLW+8cI0t VoXCxq7gHj4Oc1nU142FmX1avvjr3baEOHwbpm04= 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 5.15 275/411] exfat: fix double free in delayed_free Date: Mon, 23 Jun 2025 15:06:59 +0200 Message-ID: <20250623130640.576712566@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130632.993849527@linuxfoundation.org> References: <20250623130632.993849527@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-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 314d5407a1be5..a75d5fb2404c7 100644 --- a/fs/exfat/nls.c +++ b/fs/exfat/nls.c @@ -804,4 +804,5 @@ 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