From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 14E1F340A6F; Sat, 30 May 2026 18:07:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780164458; cv=none; b=oIHn6h7SNx5NBcPzPkUf8JJ8O0Ce95U15e7yHyraPtBYZTW0DF+Lolp/O3WmTcEqoYtCz+i5Kmv4BP312u/+5RWlW1iBXzLt0Wa5gScPmhasQSzt4ORUJHFNY5hduP7g6wZvPcybegtBOjKnXLhB0JxQ0Oq5wbGWX/QrBK2WEb0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780164458; c=relaxed/simple; bh=S+j8eM9dLCr3ni75zTxoRxVwl8mg5m6XaCiNHEptoUg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=E2t2pqzI2am+KWR4WftWF2HIl6aDF51Tl9PQrFKM1EX7zBQZxnYhJMxgb2GX1yIdL2FohjkJ/TO1A6bd8EF9tmqerxnYOQkMQapgVSQg90jLlVcOWKBNW9BIrTsfc2AK4mqktTZQsWPPMbSE0OB3Mm+vY4MwTQJYfHaHcHvN1TE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=A4nmZRf3; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="A4nmZRf3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5AB9F1F00893; Sat, 30 May 2026 18:07:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780164457; bh=UCSfQQS6QlqxPyyAfzow1qysz0Oz+NwR8XX5kswmGNc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=A4nmZRf3757KdjNRNzMorFhKOLTwqSABQN7s0nI7QJEgjIQPqL4QxxmNS5icHafKt KRgPQGVI8Jl6Y+p65F72UZ/HsQLklA2S46JYzJiy6nezme81iWBOqd2nXr0fKy9T+9 /eaP+CDA+BvuCM0tKhgxeWICY1qyWog8EQHbF9m8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Fedor Pchelkin , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Sasha Levin Subject: [PATCH 5.15 532/776] platform/x86: dell_rbu: avoid uninit value usage in packet_size_write() Date: Sat, 30 May 2026 18:04:06 +0200 Message-ID: <20260530160253.953745883@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@linuxfoundation.org> User-Agent: quilt/0.69 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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fedor Pchelkin [ Upstream commit f8fd138c2363c0e2d3235c32bfb4fb5c6474e4ae ] Ensure the temp value has been properly parsed from the user-provided buffer and initialized to be used in later operations. While at it, prefer a convenient kstrtoul() helper. Found by Linux Verification Center (linuxtesting.org) with Svace static analysis tool. Fixes: ad6ce87e5bd4 ("[PATCH] dell_rbu: changes in packet update mechanism") Signed-off-by: Fedor Pchelkin Link: https://patch.msgid.link/20260403134240.604837-1-pchelkin@ispras.ru [ij: add include] Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin --- drivers/platform/x86/dell/dell_rbu.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/platform/x86/dell/dell_rbu.c b/drivers/platform/x86/dell/dell_rbu.c index 9fc5d3e9e7934..8f7c790857015 100644 --- a/drivers/platform/x86/dell/dell_rbu.c +++ b/drivers/platform/x86/dell/dell_rbu.c @@ -30,6 +30,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include +#include #include #include #include @@ -617,9 +618,12 @@ static ssize_t packet_size_write(struct file *filp, struct kobject *kobj, char *buffer, loff_t pos, size_t count) { unsigned long temp; + + if (kstrtoul(buffer, 10, &temp)) + return -EINVAL; + spin_lock(&rbu_data.lock); packet_empty_list(); - sscanf(buffer, "%lu", &temp); if (temp < 0xffffffff) rbu_data.packetsize = temp; -- 2.53.0