HID: magicmouse: Do not crash on missing msc->input

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[ Upstream commit 17abd39654 ]

Fake USB devices can send their own report descriptors for which the
input_mapping() hook does not get called.  In this case, msc->input stays NULL,
leading to a crash at a later time.

Detect this condition in the input_configured() hook and reject the device.

This is not supposed to happen with actual magic mouse devices, but can be
provoked by imposing as a magic mouse USB device.

Cc: stable@vger.kernel.org
Signed-off-by: Günther Noack <gnoack@google.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Günther Noack 2026-01-09 11:57:14 +01:00 • committed by Sasha Levin

parent 1d46d07458

commit 5bbe266272

1 changed files with 5 additions and 0 deletions

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drivers/hid/hid-magicmouse.c

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