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 8A29B770FE; Tue, 26 Aug 2025 12:57:41 +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=1756213061; cv=none; b=pgWpJCnGLo0RRcmN9rZp0Ed3kosj9OFhy+e63EwNimzdBUfxnQNlL6jTl5K6dcbHomn/6DC2VnkTrQPVMdIr47IFYxjXkuJs8mtAQHGY2YTZn5fAxwzCfzmnhLS1JH0gft+HY+Il8Qxu7iIGs0MRUaSRBGvpSO/V+HoFlMgaCV4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756213061; c=relaxed/simple; bh=Q7HVV/ofaNLaJ9VsQHMmxrBuBvAI+sDhh9EoMIIhSIU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VkoDvub0tQdC6hk4DRLOgXZgv9zgIic37lb3gVIPBoxRliEq2zBMGAeI+UccbSReNmSvcmFAtUuuRMW4nVQ4iwIQXRr2liKa7w0niv9J1V8c9r+qkhhnvKHrlFZwOviUqx53uA2k3lWyCAHuHqYFEAPZO017IjfVppNf8itvYBw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=CpdWrQb6; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="CpdWrQb6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1F2AFC4CEF1; Tue, 26 Aug 2025 12:57:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756213061; bh=Q7HVV/ofaNLaJ9VsQHMmxrBuBvAI+sDhh9EoMIIhSIU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CpdWrQb6yOArMS7kaqxCSBypGAH1k9K7PmNseQTN6tdMKApV+2qfOw7Qcj2e6wsAj HP0eUN9oXSLas5DNxj96y4wpAadUpC4lTOxdbnxWv5TCiEPkiPtxiMTXf5pJhMHvs5 K75gt2C37N+ruf2k/FZA7wwxiML9BKlolbKKccLk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, ap420073@gmail.com, Mina Almasry , Stanislav Fomichev , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.6 189/587] netmem: fix skb_frag_address_safe with unreadable skbs Date: Tue, 26 Aug 2025 13:05:38 +0200 Message-ID: <20250826110957.750078213@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110952.942403671@linuxfoundation.org> References: <20250826110952.942403671@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mina Almasry [ Upstream commit 4672aec56d2e8edabcb74c3e2320301d106a377e ] skb_frag_address_safe() needs a check that the skb_frag_page exists check similar to skb_frag_address(). Cc: ap420073@gmail.com Signed-off-by: Mina Almasry Acked-by: Stanislav Fomichev Link: https://patch.msgid.link/20250619175239.3039329-1-almasrymina@google.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- include/linux/skbuff.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 7b7222b4f611..3a558a3c2cca 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3556,7 +3556,13 @@ static inline void *skb_frag_address(const skb_frag_t *frag) */ static inline void *skb_frag_address_safe(const skb_frag_t *frag) { - void *ptr = page_address(skb_frag_page(frag)); + struct page *page = skb_frag_page(frag); + void *ptr; + + if (!page) + return NULL; + + ptr = page_address(page); if (unlikely(!ptr)) return NULL; -- 2.39.5