ACK: [SRU][F][PATCH 0/1] CVE-2021-47001

[Guoqing Jiang]

Acked-by: Guoqing Jiang <guoqing.jiang at canonical.com>

On 11/7/24 17:30, Jacob Martin wrote:
> [Impact]
>
> A race condition exists in the RPC over RDMA driver where after a reconnect,
> the congestion window is increased before enough receive work requests are
> posted to receive the replies. This results in an immediate receive-not-ready
> response, causing the new connection to be lost.
>
> [Fix]
>
> This issue is resolved by 35d8b10a2588 ("xprtrdma: Fix cwnd update ordering").
> This fix posts more receive work requests before adjusting the congestion
> window, so enough are available to handle the new requests.
>
> Noble: Not affected
> Jammy: Not affected
> Focal: Backport from mainline with trivial context adjustments for K5.4.
> Bionic: Not affected
> Xenial: Not affected
> Trusty: Not affected
>
> [Test Case]
>
> Compile tested.
>
> [Where problems could occur]
>
> An issue with this fix would result in misbehavior of the rpcrdma driver.
>
> Chuck Lever (1):
>    xprtrdma: Fix cwnd update ordering
>
>   net/sunrpc/xprtrdma/rpc_rdma.c  |  3 ++-
>   net/sunrpc/xprtrdma/verbs.c     | 10 +++++-----
>   net/sunrpc/xprtrdma/xprt_rdma.h |  2 +-
>   3 files changed, 8 insertions(+), 7 deletions(-)
>