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 0760130D401; Wed, 30 Sep 2026 19:26:12 +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=1790796373; cv=none; b=hmu5/zu/REQ5iTBSrSDalFQWNu1Z0u9mryK9vMTkQh6NDmzlH/Ql8mn1Xgo39p+QBR4vB4tDGZPWm0388pRMah9epm3WqrPD0Pgx7K7RL7g1CG6wETuBg6bt5M6yWOzg2ljpTz5N/fgSj0HrDqd4oK/hLqUbbTKbQwdjRow6zJU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790796373; c=relaxed/simple; bh=KF+ynqu9mT5AROsww4+QRXhwB4eItZlrOUdfKeNyl5Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NQEk99dIM3wUDxssHTe+mXNO4VhcjUShhkw/SG1vf/s4zhDgxaUQ2D78lRdguGm2cLbJtDwmJ+rJQAhe41y4NbkAvEOxhax2A3h5m1YPk2wdrHKajs8BVo+c1mDHmy7TAhOuvoiKTuHSrRismOm1MHWOwN+IatAcPmlVPQPDmYY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=oHpvBKcg; 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="oHpvBKcg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 635A21F000FF; Wed, 30 Sep 2026 19:26:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790796371; bh=ho+0jKTVNg13S8CWMiCxdb28o8qH9NJoqYsARRovXlU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=oHpvBKcg2/PQrsV89x3mZo1lABvMcPAJS9Y++IgsOV16EdqygVnVd6p05Q9A+d7m8 Af9lO2pKsq7E5wJcDwKpZTg3VC4tOZD+aDrbrMIxl88V94YygKHKfkSRw8jVRdfr5M epWC5vkwYHI0BjpovVOUEO2MDegQRqRiA78ID+i4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Felix Gu , Ulf Hansson Subject: [PATCH 6.6 0889/1193] mmc: sdio_uart: fix xmit_fifo leak when the port table is full Date: Wed, 30 Sep 2026 17:26:13 +0200 Message-ID: <20260930152453.999627189@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152434.301151190@linuxfoundation.org> References: <20260930152434.301151190@linuxfoundation.org> User-Agent: quilt/0.69 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Felix Gu commit 53823e25793a97d07e6e98e0904bbf74cac8bc76 upstream. sdio_uart_add_port() allocates the transmit fifo before claiming a slot in sdio_uart_table[]. When all UART_NR slots are taken, it returns -EBUSY with the fifo still allocated, but the probe error path only kfree()s the port, leaking the transmit fifo. Free the fifo in the failure path of sdio_uart_add_port() itself so the function retains nothing on error. Fixes: 8b197a5ce7a7 ("sdio_uart: Use kfifo instead of the messy circ stuff") Signed-off-by: Felix Gu Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/core/sdio_uart.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/mmc/core/sdio_uart.c +++ b/drivers/mmc/core/sdio_uart.c @@ -104,6 +104,9 @@ static int sdio_uart_add_port(struct sdi } spin_unlock(&sdio_uart_table_lock); + if (ret) + kfifo_free(&port->xmit_fifo); + return ret; }