Re: [PATCH] sound: ua101: fix division by zero at probe

On Tue, 26 Oct 2021 11:54:01 +0200, Johan Hovold wrote:

Add the missing endpoint max-packet sanity check to probe() to avoid division by zero in alloc_stream_buffers() in case a malicious device has broken descriptors (or when doing descriptor fuzz testing).

Note that USB core will reject URBs submitted for endpoints with zero wMaxPacketSize but that drivers doing packet-size calculations still need to handle this (cf. commit 2548288b4fb0 ("USB: Fix: Don't skip endpoint descriptors with maxpacket=0")).

Fixes: 63978ab3e3e9 ("sound: add Edirol UA-101 support") Cc: stable@vger.kernel.org # 2.6.34 Signed-off-by: Johan Hovold johan@kernel.org

Thanks, applied.

Takashi