linux-kernel - [PATCH -next v2 1/3] spi: microchip-core: fix UAF in mchp_corespi

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Date:   Wed, 13 Jul 2022 10:56:55 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>
CC:     <conor.dooley@...rochip.com>, <daire.mcnamara@...rochip.com>,
        <broonie@...nel.org>
Subject: [PATCH -next v2 1/3] spi: microchip-core: fix UAF in mchp_corespi_remove()

When using devm_spi_register_master(), the unregister function will
be called in devres_release_all() which is called after ->remove(),
so remove spi_unregister_master() andspi_master_put().

Fixes: 9ac8d17694b6 ("spi: add support for microchip fpga spi controllers")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/spi/spi-microchip-core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/spi/spi-microchip-core.c b/drivers/spi/spi-microchip-core.c
index b3083075cd36..c26767343176 100644
--- a/drivers/spi/spi-microchip-core.c
+++ b/drivers/spi/spi-microchip-core.c
@@ -595,8 +595,6 @@ static int mchp_corespi_remove(struct platform_device *pdev)
 	struct mchp_corespi *spi = spi_master_get_devdata(master);
 
 	mchp_corespi_disable_ints(spi);
-	spi_unregister_master(master);
-	spi_master_put(master);
 	clk_disable_unprepare(spi->clk);
 	mchp_corespi_disable(spi);
 
-- 
2.25.1