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| author | Josh Boyer <jwboyer@fedoraproject.org> | 2016-03-14 10:42:38 -0400 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2016-04-11 16:44:05 +0200 |
| commit | 74fd1380d488617ce8a11dbf4f91ec6f0d605255 (patch) | |
| tree | 0398f603032d7728933afb00ad92712bed42febc /drivers/usb | |
| parent | f475db149d75bf100084a813ce9e1e9f4fa508e7 (diff) | |
| download | lwn-74fd1380d488617ce8a11dbf4f91ec6f0d605255.tar.gz lwn-74fd1380d488617ce8a11dbf4f91ec6f0d605255.zip | |
USB: iowarrior: fix oops with malicious USB descriptors
commit 4ec0ef3a82125efc36173062a50624550a900ae0 upstream.
The iowarrior driver expects at least one valid endpoint. If given
malicious descriptors that specify 0 for the number of endpoints,
it will crash in the probe function. Ensure there is at least
one endpoint on the interface before using it.
The full report of this issue can be found here:
http://seclists.org/bugtraq/2016/Mar/87
Reported-by: Ralf Spenneberg <ralf@spenneberg.net>
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/misc/iowarrior.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c index d36f34e25bed..4c24ba0a6574 100644 --- a/drivers/usb/misc/iowarrior.c +++ b/drivers/usb/misc/iowarrior.c @@ -792,6 +792,12 @@ static int iowarrior_probe(struct usb_interface *interface, iface_desc = interface->cur_altsetting; dev->product_id = le16_to_cpu(udev->descriptor.idProduct); + if (iface_desc->desc.bNumEndpoints < 1) { + dev_err(&interface->dev, "Invalid number of endpoints\n"); + retval = -EINVAL; + goto error; + } + /* set up the endpoint information */ for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { endpoint = &iface_desc->endpoint[i].desc; |