RDMA/efa: Check stored completion CTX command ID with received one

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In admin command completion, we receive a CQE with the command ID which
is constructed from context index and entropy bits from the admin queue
producer counter. To try to detect memory corruptions in the received
CQE, validate the full command ID of the fetched context with the CQE
command ID. If there is a mismatch, complete the CQE with error.
Also use LSBs of the admin queue producer counter to better detect
entropy mismatch between smaller number of commands.

Reviewed-by: Daniel Kranzdorf <dkkranzd@amazon.com>
Reviewed-by: Michael Margolin <mrgolin@amazon.com>
Signed-off-by: Yonatan Nachum <ynachum@amazon.com>
Link: https://patch.msgid.link/20251210130614.36460-2-ynachum@amazon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

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Yonatan Nachum 2025-12-10 13:06:13 +00:00 • committed by Leon Romanovsky

parent 80351761fa

commit 4b01ec0f13

1 changed files with 4 additions and 2 deletions

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drivers/infiniband/hw/efa/efa_com.c

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