linux-kernel - [PATCH AUTOSEL 5.4 2/6] usb: storage: sddr55: fix sloppy typing in sddr55_{read|write}

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Message-ID: <20240403172026.353926-2-sashal@kernel.org>
Date: Wed,  3 Apr 2024 13:20:18 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Karina Yankevich <k.yankevich@....ru>,
	Sergey Shtylyov <s.shtylyov@....ru>,
	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sasha Levin <sashal@...nel.org>,
	linux-usb@...r.kernel.org,
	usb-storage@...ts.one-eyed-alien.net
Subject: [PATCH AUTOSEL 5.4 2/6] usb: storage: sddr55: fix sloppy typing in sddr55_{read|write}_data()

From: Karina Yankevich <k.yankevich@....ru>

[ Upstream commit d6429a3555fb29f380c5841a12f5ac3f7444af03 ]

In sddr55_{read|write}_data(), the address variables are needlessly typed
as *unsigned long* -- which is 32-bit type on the 32-bit arches and 64-bit
type on the 64-bit arches; those variables' value should fit into just 3
command bytes and consists of 10-bit block # (or at least the max block #
seems to be 1023) and 4-/5-bit page # within a block, so 32-bit *unsigned*
*int* type should be more than enough...

Found by Linux Verification Center (linuxtesting.org) with the Svace static
analysis tool.

[Sergey: rewrote the patch subject/description]

Signed-off-by: Karina Yankevich <k.yankevich@....ru>
Signed-off-by: Sergey Shtylyov <s.shtylyov@....ru>
Reviewed-by: Alan Stern <stern@...land.harvard.edu>
Link: https://lore.kernel.org/r/4c9485f2-0bfc-591b-bfe7-2059289b554e@omp.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/storage/sddr55.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/storage/sddr55.c b/drivers/usb/storage/sddr55.c
index c8a988d2cfdd3..18eb681da1d5a 100644
--- a/drivers/usb/storage/sddr55.c
+++ b/drivers/usb/storage/sddr55.c
@@ -196,7 +196,7 @@ static int sddr55_read_data(struct us_data *us,
 	unsigned char *buffer;
 
 	unsigned int pba;
-	unsigned long address;
+	unsigned int address;
 
 	unsigned short pages;
 	unsigned int len, offset;
@@ -316,7 +316,7 @@ static int sddr55_write_data(struct us_data *us,
 
 	unsigned int pba;
 	unsigned int new_pba;
-	unsigned long address;
+	unsigned int address;
 
 	unsigned short pages;
 	int i;
-- 
2.43.0