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 E475240243A; Wed, 20 May 2026 18:40:40 +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=1779302442; cv=none; b=IZq9Hok0505EnKrdjRiswFuuyyrP7KJ/6lwNS+ktX/LZWtbsfP4e6LuUlpQy38bnlQJhyOdj6Mt8xMiqvpMD4+NNVOKwemtyNQ1Fe1UNlHMW/ybRcwqhtoUWDxNDh6gmOGqZ+Ha7nxwm6PG5aLtaUAytLn7dUlxgOFCtF4Tm+58= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779302442; c=relaxed/simple; bh=dIV+uXyx7M7xr97xoOrOqOXfw/vLaZt9zckJ8h+djkM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=HvSpwFKmdZM+LjOJ2FzxlgGwXo/VQJSs/oGprGA6HlGM+WJ68hHaAtQUjTLu53KZ2kIhawvGDQHegm7mhGmKEU4RY0zc8e/r17t4V0X7lA2HdJriASGek4ohXQPz9wLOVicpPNXSJJ7HrOKk56dqtAjkeetU5ecxyD2t9I1aj/A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vyI5Kk5I; 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="vyI5Kk5I" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5506E1F000E9; Wed, 20 May 2026 18:40:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1779302440; bh=ckyfd/i6Yga6tC2FOKILv7ULjMseyKO8p7Oa6P8btwA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=vyI5Kk5I9ZqYdrKEKAgVjRdoWfNUtsxLqduQ64alEZMpphCe2G6LoXDBcIGyUl727 v5g6ppphKH6NbB1TC1vWRSfAn4s2a3vg923mnDX0NLu/4eex2J7gltbr9WWcH4fAUn UxJbCLmUV1YzfnHEZ0qGNieDtVvfwA1Q/KZyv1XQ= 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 6.6 269/508] platform/x86: dell_rbu: avoid uninit value usage in packet_size_write() Date: Wed, 20 May 2026 18:21:32 +0200 Message-ID: <20260520162104.474679313@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260520162058.573354582@linuxfoundation.org> References: <20260520162058.573354582@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 6.6-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 fee20866b41e4..9039e494131fd 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