From: Al Viro <viro@ftp.linux.org.uk>
To: torvalds@linux-foundation.org
Cc: gregkh@suse.de, linux-kernel@vger.kernel.org
Subject: [PATCH] cdc-wdm endianness fixes
Date: Mon, 02 Jun 2008 10:59:02 +0100 [thread overview]
Message-ID: <E1K36og-0007Yz-Hn@ZenIV.linux.org.uk> (raw)
* wMaxPacketSize is le16; copying it to a field of local structure and then
using that field as host-endian (size of object to be allocated) is broken.
* bMaxPacketSize0 is 8-bit; feeding it to le16_to_cpu() is bogus and since the
result is used as host-endian, it's not even misspelled cpu_to_le16().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 107666d..731db05 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -611,8 +611,8 @@ next_desc:
goto err;
}
- desc->wMaxPacketSize = ep->wMaxPacketSize;
- desc->bMaxPacketSize0 = cpu_to_le16(udev->descriptor.bMaxPacketSize0);
+ desc->wMaxPacketSize = le16_to_cpu(ep->wMaxPacketSize);
+ desc->bMaxPacketSize0 = udev->descriptor.bMaxPacketSize0;
desc->orq = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
if (!desc->orq)
reply other threads:[~2008-06-02 9:59 UTC|newest]
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