From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2354628682; Wed, 18 Jun 2025 21:53:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750283612; cv=none; b=YCIj3idweE4fIv+ss3pMYN3OYgUQ1oa9CACzTg+2GBSqlrTlqUGdNJTg2PUKv+uWZLL0jXLaP1KyNctVSEZIR18CmgTD/YQY8iG2qv8ODZlEuqqr0GBplgSRH34cV+Pcdb4+WVyvQE5wqJM9vpahIykMIyHVA63R+J9PTN0P+k4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750283612; c=relaxed/simple; bh=wXtVusAp3+QiMEIYqRg9Vl6bCRKV2LLfzhRzLsjob9w=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=AeDxsfA8rn3f11fWYlzszYl2ftda2FF6d7lmnMJaMLD850lB82WFJd/Nt6vPdG9sLfIf7mBP+0H0LJYsadpZ8ewrA3i91lsMeqLLHaI11c618HJ/WdFReKvC3CJCFW+SnuD2EoKdaBmYe0BvPnKbP96Dk9zhSLlX1WuOZaN+lKM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DhJO2H3G; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DhJO2H3G" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6193EC4CEE7; Wed, 18 Jun 2025 21:53:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750283611; bh=wXtVusAp3+QiMEIYqRg9Vl6bCRKV2LLfzhRzLsjob9w=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=DhJO2H3GZYNsUHx0LMLE5Fls0eTyfMNnoQLmwYviESb1WWJPdRitbjF36PFQeByn2 BnRngd3AQhxuqE+ApR0C96PpCF0e+BaSnAIK/KVyyzbjwEnMzXMpfiAt+27sRMEXS/ x8+ByI0b6GGuUqpt6Modf6UOJhryCcPwcUXqcdflsnTEGqV60IRlUmu+mGT9YcTyjk ueSHH1vs65tGjZVCbZ2cI4c0aUcg6dEoeyHaLxeGI6tmCovJL9PTTie3NQjyzkwjAl bJGvrZS8lkNSvLrmzBx2HSO0Z01Z9BzYW8ZinnO4avwQ9MGCi9zZSeSowc19OL3S1N +d/1qQHQ8y+9Q== Date: Wed, 18 Jun 2025 14:53:30 -0700 From: Jakub Kicinski To: Mina Almasry Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , ap420073@gmail.com Subject: Re: [PATCH net v1] netmem: fix skb_frag_address_safe with unreadable skbs Message-ID: <20250618145330.2584636e@kernel.org> In-Reply-To: <20250617210950.1338107-1-almasrymina@google.com> References: <20250617210950.1338107-1-almasrymina@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Tue, 17 Jun 2025 21:09:50 +0000 Mina Almasry wrote: > + void *ptr; > + > + if (!skb_frag_page(frag)) > + return NULL; > + > + ptr = page_address(skb_frag_page(frag)); Sorry, noticed mid-push that we're calling skb_frag_page() twice. Let's save the return value and pass it to page_address? -- pw-bot: cr