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authorJohan Hovold <johan@kernel.org>2017-03-13 15:47:48 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-03-14 12:07:30 +0300
commitb0addd3fa6bcd119be9428996d5d4522479ab240 (patch)
tree3768e9d858743a26feb196a4ae06a16b9a1f8cdc /drivers/usb/misc
parent4495c08e84729385774601b5146d51d9e5849f81 (diff)
downloadlinux-b0addd3fa6bcd119be9428996d5d4522479ab240.tar.xz
USB: idmouse: fix NULL-deref at probe
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") Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/misc')
-rw-r--r--drivers/usb/misc/idmouse.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c
index 8b9fd7534f69..502bfe30a077 100644
--- a/drivers/usb/misc/idmouse.c
+++ b/drivers/usb/misc/idmouse.c
@@ -347,6 +347,9 @@ 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)