thunderbolt: Limit XDomain response copy to actual frame size

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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>

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Michael Bommarito 2026-05-25 05:28:29 -04:00 • committed by Mika Westerberg

parent a504b9f279

commit 4db2bd2ed4

1 changed files with 3 additions and 1 deletions

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drivers/thunderbolt/xdomain.c

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