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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 09:16:56 +0000 (10:16 +0100)
commitd8cd524ae4ec788011a14be17503fc224f260fe3
tree81e53f114ccf4f02df86c55ec3cea0e6704e748atree | snapshot (tar.gz zip)
parente7c8afee149134b438df153b09af7fd928a8bc24commit | 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 | blame | history
drivers/usb/gadget/legacy/dbgp.c diff | blob | blame | history