linux-kernel - [PATCH AUTOSEL 4.19 020/206] mtd: cfi_cmdset_0002: don't free cfi->cfiq in error path of cfi_amdstd

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Message-Id: <20200918020802.2065198-20-sashal@kernel.org>
Date:   Thu, 17 Sep 2020 22:04:56 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Hou Tao <houtao1@...wei.com>, Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Sasha Levin <sashal@...nel.org>, linux-mtd@...ts.infradead.org
Subject: [PATCH AUTOSEL 4.19 020/206] mtd: cfi_cmdset_0002: don't free cfi->cfiq in error path of cfi_amdstd_setup()

From: Hou Tao <houtao1@...wei.com>

[ Upstream commit 03976af89e3bd9489d542582a325892e6a8cacc0 ]

Else there may be a double-free problem, because cfi->cfiq will
be freed by mtd_do_chip_probe() if both the two invocations of
check_cmd_set() return failure.

Signed-off-by: Hou Tao <houtao1@...wei.com>
Reviewed-by: Richard Weinberger <richard@....at>
Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mtd/chips/cfi_cmdset_0002.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 1dbc9554a0786..3ab75d3e2ce32 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -727,7 +727,6 @@ static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd)
 	kfree(mtd->eraseregions);
 	kfree(mtd);
 	kfree(cfi->cmdset_priv);
-	kfree(cfi->cfiq);
 	return NULL;
 }
 
-- 
2.25.1