linux-kernel - Re: [PATCH 6.10.y] idpf: fix memleak in vport interrupt configuration

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Message-ID: <2024081251-eggshell-down-d665@gregkh>
Date: Mon, 12 Aug 2024 16:20:00 +0200
From: Greg KH <greg@...ah.com>
To: Alexander Lobakin <aleksander.lobakin@...el.com>
Cc: stable@...r.kernel.org, Michal Kubiak <michal.kubiak@...el.com>,
	Pavan Kumar Linga <pavan.kumar.linga@...el.com>,
	Simon Horman <horms@...nel.org>,
	Krishneil Singh <krishneil.k.singh@...el.com>,
	Tony Nguyen <anthony.l.nguyen@...el.com>,
	Jakub Kicinski <kuba@...nel.org>,
	nex.sw.ncis.osdt.itp.upstreaming@...el.com,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6.10.y] idpf: fix memleak in vport interrupt configuration

On Mon, Aug 12, 2024 at 03:44:55PM +0200, Alexander Lobakin wrote:
> From: Michal Kubiak <michal.kubiak@...el.com>
> 
> commit 3cc88e8405b8d55e0ff035e31971aadd6baee2b6 upstream.
> 
> The initialization of vport interrupt consists of two functions:
>  1) idpf_vport_intr_init() where a generic configuration is done
>  2) idpf_vport_intr_req_irq() where the irq for each q_vector is
>    requested.
> 
> The first function used to create a base name for each interrupt using
> "kasprintf()" call. Unfortunately, although that call allocated memory
> for a text buffer, that memory was never released.
> 
> Fix this by removing creating the interrupt base name in 1).
> Instead, always create a full interrupt name in the function 2), because
> there is no need to create a base name separately, considering that the
> function 2) is never called out of idpf_vport_intr_init() context.
> 
> Fixes: d4d558718266 ("idpf: initialize interrupts and enable vport")
> Cc: stable@...r.kernel.org # 6.7
> Signed-off-by: Michal Kubiak <michal.kubiak@...el.com>
> Reviewed-by: Pavan Kumar Linga <pavan.kumar.linga@...el.com>
> Signed-off-by: Alexander Lobakin <aleksander.lobakin@...el.com>
> Reviewed-by: Simon Horman <horms@...nel.org>
> Tested-by: Krishneil Singh <krishneil.k.singh@...el.com>
> Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
> Link: https://patch.msgid.link/20240806220923.3359860-3-anthony.l.nguyen@intel.com
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
> ---
>  drivers/net/ethernet/intel/idpf/idpf_txrx.c | 19 ++++++++-----------
>  1 file changed, 8 insertions(+), 11 deletions(-)
> 

Now queued up, thanks.

greg k-h