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Commit c2c65cd2 authored by Dan Carpenter's avatar Dan Carpenter Committed by Linus Torvalds
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staging: ozwpan: prevent overflow in oz_cdev_write() 



We need to check "count" so we don't overflow the ei->data buffer.

Reported-by: default avatarNico Golde <nico@ngolde.de>
Reported-by: default avatarFabian Yamaguchi <fabs@goesec.de>
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Cc: stable@kernel.org
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 201f99f1

drivers/staging/ozwpan/ozcdev.c

+3 −0
Original line number Diff line number Diff line
@@ -155,6 +155,9 @@ static ssize_t oz_cdev_write(struct file *filp, const char __user *buf, 
	struct oz_app_hdr *app_hdr;

	struct oz_serial_ctx *ctx;



	if (count > sizeof(ei->data) - sizeof(*elt) - sizeof(*app_hdr))

		return -EINVAL;



	spin_lock_bh(&g_cdev.lock);

	pd = g_cdev.active_pd;

	if (pd)