linux-kernel - [PATCH v3 01/12] staging: gpib: Fix buffer overflow in ni_usb

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Message-ID: <20241104175014.12317-2-dpenkler@gmail.com>
Date: Mon,  4 Nov 2024 18:50:02 +0100
From: Dave Penkler <dpenkler@...il.com>
To: gregkh@...uxfoundation.org,
	linux-staging@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Cc: skhan@...uxfoundation.org,
	arnd@...db.de,
	dan.carpenter@...aro.org,
	Dave Penkler <dpenkler@...il.com>
Subject: [PATCH v3 01/12] staging: gpib: Fix buffer overflow in ni_usb_init

The writes buffer size was not taking into account the number of
entries in the array which was causing random oopses.

Fixes: 4e127de14fa7 ("staging: gpib: Add National Instruments USB GPIB driver")
Signed-off-by: Dave Penkler <dpenkler@...il.com>
---
 drivers/staging/gpib/ni_usb/ni_usb_gpib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/gpib/ni_usb/ni_usb_gpib.c b/drivers/staging/gpib/ni_usb/ni_usb_gpib.c
index 571f07800c9a..b7550a937f15 100644
--- a/drivers/staging/gpib/ni_usb/ni_usb_gpib.c
+++ b/drivers/staging/gpib/ni_usb/ni_usb_gpib.c
@@ -1726,7 +1726,7 @@ static int ni_usb_init(gpib_board_t *board)
 	unsigned int ibsta;
 	int writes_len;
 
-	writes = kmalloc(sizeof(*writes), GFP_KERNEL);
+	writes = kmalloc_array(NUM_INIT_WRITES, sizeof(*writes), GFP_KERNEL);
 	if (!writes)
 		return -ENOMEM;
 
-- 
2.46.2