thunderbolt: Limit XDomain response copy to actual frame size

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commit 4db2bd2ed4 upstream.

tb_xdomain_copy() copies req->response_size bytes from the received
packet buffer regardless of the actual frame size.  When a short
response arrives, this reads past the valid frame data in the DMA
pool buffer into stale contents from previous transactions.

Use the minimum of frame size and expected response size for the
copy length.

Fixes: cdae7c07e3 ("thunderbolt: Add support for XDomain properties")
Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-4-7
Signed-off-by: Michael Bommarito <michael.bommarito@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Michael Bommarito 2026-05-25 05:28:29 -04:00 • committed by Greg Kroah-Hartman

parent 6021d39ccd

commit 7720654b48

1 changed files with 3 additions and 1 deletions

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drivers/thunderbolt/xdomain.c

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