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 A0CA22FFDEA; Thu, 16 Jul 2026 13:53:42 +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=1784210023; cv=none; b=NDsTTXmQJII6WK5AxFDomtbH7X6vSUV9UE8YVhzC4NHoqTkJrW1ovNL8yqQeZCRKznycpU+VAVyVfvXt91AyhWC1SDqYN18pOqtSGD2t/4eHtC3tWYK6Joa4RiVLJFkfU/p9Va2446hNrEQ3ltSry4yjkULfGhGdzuEpff1hXhU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784210023; c=relaxed/simple; bh=GEkmYicLDIHFKV1+K80mygTpvGLNlVqB9AwTKxPfMRI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ws/NXZjei3P/ug+yvLMrA8eOILJL505sNamxxJkrnguclDHnP364QGiPgTo8a3FnnYbvip5L8OlCnnQOAwRmXQpQa7h6Zn65KQxIuP6nCMwNwAGXtipMh4nyscklfzpQEyILtWM7kv2+5pTHbD5xcpN3ho1Dq3aBSmV8RDBmqfs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dMEn26+k; 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="dMEn26+k" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 133B21F000E9; Thu, 16 Jul 2026 13:53:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784210022; bh=4YQrXMSgMoF9Wa2D1TzNjBKfypzq2XnF9iAQv33YRYo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=dMEn26+klQqsSqyVjqU8Js8yFYCG9isorp8dVV6tVr3WLw4De7w2YS4g00BVHONJH rk+vnFae9oEZmqKDVVJqxYkczfA1JoFZOfhdKoh+/L/pTykukSi8ZJzbiES58loh2Y 6hNIrBYEmes+ffmcDY7H+HQkTOHLxsZuZCL0XLFI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Luca Boccassi , Pasha Tatashin , Pratyush Yadav , "Mike Rapoport (Microsoft)" Subject: [PATCH 7.1 409/518] liveupdate: reject LIVEUPDATE_IOCTL_CREATE_SESSION with invalid name length Date: Thu, 16 Jul 2026 15:31:17 +0200 Message-ID: <20260716133056.783140568@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260716133047.772246337@linuxfoundation.org> References: <20260716133047.772246337@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-Transfer-Encoding: 8bit 7.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Luca Boccassi commit e947433cd0d2b95a277757451b9b9c2714136dc2 upstream. A session name must not be an empty string, and must not exceed the maximum size define in the uapi header, including null termination. Fixes: 0153094d03df ("liveupdate: luo_session: add sessions support") Cc: stable@vger.kernel.org Signed-off-by: Luca Boccassi Reviewed-by: Pasha Tatashin Reviewed-by: Pratyush Yadav Acked-by: Mike Rapoport (Microsoft) Link: https://lore.kernel.org/r/20260429212221.814107-2-luca.boccassi@gmail.com Signed-off-by: Pasha Tatashin Signed-off-by: Mike Rapoport (Microsoft) Signed-off-by: Greg Kroah-Hartman --- kernel/liveupdate/luo_session.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/kernel/liveupdate/luo_session.c +++ b/kernel/liveupdate/luo_session.c @@ -382,9 +382,13 @@ static int luo_session_getfile(struct lu int luo_session_create(const char *name, struct file **filep) { + size_t len = strnlen(name, LIVEUPDATE_SESSION_NAME_LENGTH); struct luo_session *session; int err; + if (len == 0 || len > LIVEUPDATE_SESSION_NAME_LENGTH - 1) + return -EINVAL; + session = luo_session_alloc(name); if (IS_ERR(session)) return PTR_ERR(session);