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References: <20240611082547.12178-1-amishin@t-argos.ru>
In-Reply-To: <20240611082547.12178-1-amishin@t-argos.ru>
From: Michael Chan <michael.chan@broadcom.com>
Date: Tue, 11 Jun 2024 09:39:32 -0700
Message-ID: <CACKFLinkivwuOMgEY74bNWzy2bNLheR7dWsPSmbLdCMhHxDqLQ@mail.gmail.com>
Subject: Re: [PATCH net v3] bnxt_en: Adjust logging of firmware messages in
 case of released token in __hwrm_send()
To: Aleksandr Mishin <amishin@t-argos.ru>
Cc: Edwin Peer <edwin.peer@broadcom.com>, "David S. Miller" <davem@davemloft.net>, 
	Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, 
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org, 
	lvc-project@linuxtesting.org, Wojciech Drewek <wojciech.drewek@intel.com>
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On Tue, Jun 11, 2024 at 1:28=E2=80=AFAM Aleksandr Mishin <amishin@t-argos.r=
u> wrote:
>
> In case of token is released due to token->state =3D=3D BNXT_HWRM_DEFERRE=
D,
> released token (set to NULL) is used in log messages. This issue is
> expected to be prevented by HWRM_ERR_CODE_PF_UNAVAILABLE error code. But
> this error code is returned by recent firmware. So some firmware may not
> return it. This may lead to NULL pointer dereference.
> Adjust this issue by adding token pointer check.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
> Fixes: 8fa4219dba8e ("bnxt_en: add dynamic debug support for HWRM message=
s")
> Suggested-by: Michael Chan <michael.chan@broadcom.com>
> Signed-off-by: Aleksandr Mishin <amishin@t-argos.ru>
> Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
> ---
> v1->v2: Preserve the error message by replacing 'token' with 'ctx->req->s=
eq_id' as suggested by Michael.
>  As the patch didn't change significantly, add Wojciech's Reviewed-by tag=
 from the previous version.
> v2->v3: Fix missing alignment.

Thanks.
Reviewed-by: Michael Chan <michael.chan@broadcom.com>

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