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xhci: xhci-mem: off by one in xhci_stream_id_to_ring()

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commit 313db3d648 upstream.

The > should be >= here so that we don't read one element beyond the end
of the ep->stream_info->stream_rings[] array.

Fixes: e9df17eb14 ("USB: xhci: Correct assumptions about number of rings per endpoint.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2018-07-04 12:48:53 +03:00 • committed by Greg Kroah-Hartman
commit 3cd94f78ef
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/host/xhci-mem.c
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@ -638,7 +638,7 @@ struct xhci_ring *xhci_stream_id_to_ring(
if (!ep->stream_info)
return NULL;
if (stream_id > ep->stream_info->num_streams)
if (stream_id >= ep->stream_info->num_streams)
return NULL;
return ep->stream_info->stream_rings[stream_id];
}