linux-kernel - Re: [PATCH 4.19 018/106] clk: actions: Dont reference clk_init

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 8 Oct 2019 14:20:01 +0200
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 4.19 018/106] clk: actions: Dont reference clk_init_data
 after registration

On Sun 2019-10-06 19:20:24, Greg Kroah-Hartman wrote:
> From: Stephen Boyd <sboyd@...nel.org>
> 
> [ Upstream commit cf9ec1fc6d7cceb73e7f1efd079d2eae173fdf57 ]
> 
> A future patch is going to change semantics of clk_register() so that
> clk_hw::init is guaranteed to be NULL after a clk is registered. Avoid
> referencing this member here so that we don't run into NULL pointer
> exceptions.

18,19,20,21: I see the patches make sense for mainline, but why were
they selected for stable?

								Pavel


> +++ b/drivers/clk/actions/owl-common.c
> @@ -67,16 +67,17 @@ int owl_clk_probe(struct device *dev, struct clk_hw_onecell_data *hw_clks)
>  	struct clk_hw *hw;
>  
>  	for (i = 0; i < hw_clks->num; i++) {
> +		const char *name;
>  
>  		hw = hw_clks->hws[i];
> -
>  		if (IS_ERR_OR_NULL(hw))
>  			continue;
>  
> +		name = hw->init->name;
>  		ret = devm_clk_hw_register(dev, hw);
>  		if (ret) {
>  			dev_err(dev, "Couldn't register clock %d - %s\n",
> -				i, hw->init->name);
> +				i, name);
>  			return ret;
>  		}
>  	}

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Download attachment "signature.asc" of type "application/pgp-signature" (182 bytes)