linux-kernel - Re: [PATCH] RDMA/irdma: Fix possible null-pointer dereference in irdma_create_user

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Message-ID: <20251112113005.GC17382@unreal>
Date: Wed, 12 Nov 2025 13:30:05 +0200
From: Leon Romanovsky <leon@...nel.org>
To: Tuo Li <islituo@...il.com>
Cc: krzysztof.czurylo@...el.com, tatyana.e.nikolova@...el.com, jgg@...pe.ca,
	linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] RDMA/irdma: Fix possible null-pointer dereference in
 irdma_create_user_ah()

On Wed, Nov 12, 2025 at 03:45:12PM +0800, Tuo Li wrote:
> The variable udata is checked at the beginning of irdma_create_user_as(),
> indicating that it can be NULL:
> 
>   if (udata && udata->outlen < IRDMA_CREATE_AH_MIN_RESP_LEN)
>     return -EINVAL;

Just delete "udata" check from this if(). irdma_create_user_ah() always
receives udate.

Thanks