iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

USB: idmouse: fix NULL-deref at probe

Browse Source 
commit b0addd3fa6bcd119be9428996d5d4522479ab240 upstream.

Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2017-03-13 13:47:48 +01:00 committed by Greg Kroah-Hartman
parent a7712869e2
commit d6389d6abb
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/usb/misc/idmouse.c
View File

@ -346,6 +346,9 @@ static int idmouse_probe(struct usb_interface *interface,
if (iface_desc->desc.bInterfaceClass != 0x0A)
return -ENODEV;
if (iface_desc->desc.bNumEndpoints < 1)
return -ENODEV;
/* allocate memory for our device state and initialize it */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL)