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USB: gadget: zero allocate endpoint 0 buffers
authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 9 Dec 2021 18:02:15 +0000 (19:02 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 14 Dec 2021 09:18:08 +0000 (10:18 +0100)
commit32de5efd483db68f12233fbf63743a2d92f20ae4
tree29ab4813d48de04a539369ac9d7f883f4f713966tree
parent13e45e7a262dd96e8161823314679543048709b9commit | diff
USB: gadget: zero allocate endpoint 0 buffers

commit 86ebbc11bb3f60908a51f3e41a17e3f477c2eaa3 upstream.

Under some conditions, USB gadget devices can show allocated buffer
contents to a host.  Fix this up by zero-allocating them so that any
extra data will all just be zeros.

Reported-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Tested-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/gadget/composite.c diff | blob | history
drivers/usb/gadget/legacy/dbgp.c diff | blob | history
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