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 DBF9A32E142; Mon, 27 Oct 2025 18:49:39 +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=1761590980; cv=none; b=jVR7ixIabKBe+S9uv7nX6XB7/69zmWRRTiuC9/ArbIfXkjbhpqyzSN/Al9R/JQpPHNsc1EKHfACbbTOFb/VQcTDY8JtjFQULZxET3tSOs+zLph/QsIFfwGcUFMIrKMqeKE/mgfu7JPAWv7HUcZ3rf4NeJhgIQZqAWUpFUJ+zWj0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761590980; c=relaxed/simple; bh=hEGXR8O2KDLvJLTiMUsYitjCZlfXbxIP23PAOs7TFLw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TtMoli/OPUPBTAoSvpFAioQEDEAP4y0r0uyHbyQdE3+twOYx3Po681HTJbwZekLzSd/rXaL4KYbXVGaYAIzS3kqapOelo/+xHFjDJXKMoKj3N/l160+zFK4qbuGcWL4OSqwofF2fupcNJo6moUhBKxKTdWWPbgPcUgyztKplyys= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=VUsROXfK; 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="VUsROXfK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 63AF0C4CEF1; Mon, 27 Oct 2025 18:49:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1761590979; bh=hEGXR8O2KDLvJLTiMUsYitjCZlfXbxIP23PAOs7TFLw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VUsROXfKQtmex3yqXBO+/p/Omi9g4hVhbagBiEIqFx88wrjtxAOne690QhbDD/4V1 MpHNfykyP1pyTKSsSlV/N5/dI7SGLH4ViMFHSarsrdyM0dV9cESYSSs3IJUrRQps0X TB5su8TUndrdea/ytHurZpadWAsdWA5fDS/fk1ec= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Bala-Vignesh-Reddy , Mark Brown , Will Deacon , Sasha Levin Subject: [PATCH 5.10 021/332] selftests: arm64: Check fread return value in exec_target Date: Mon, 27 Oct 2025 19:31:14 +0100 Message-ID: <20251027183525.180734659@linuxfoundation.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251027183524.611456697@linuxfoundation.org> References: <20251027183524.611456697@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 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bala-Vignesh-Reddy [ Upstream commit a679e5683d3eef22ca12514ff8784b2b914ebedc ] Fix -Wunused-result warning generated when compiled with gcc 13.3.0, by checking fread's return value and handling errors, preventing potential failures when reading from stdin. Fixes compiler warning: warning: ignoring return value of 'fread' declared with attribute 'warn_unused_result' [-Wunused-result] Fixes: 806a15b2545e ("kselftests/arm64: add PAuth test for whether exec() changes keys") Signed-off-by: Bala-Vignesh-Reddy Reviewed-by: Mark Brown Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- tools/testing/selftests/arm64/pauth/exec_target.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/arm64/pauth/exec_target.c b/tools/testing/selftests/arm64/pauth/exec_target.c index 4435600ca400d..e597861b26d6b 100644 --- a/tools/testing/selftests/arm64/pauth/exec_target.c +++ b/tools/testing/selftests/arm64/pauth/exec_target.c @@ -13,7 +13,12 @@ int main(void) unsigned long hwcaps; size_t val; - fread(&val, sizeof(size_t), 1, stdin); + size_t size = fread(&val, sizeof(size_t), 1, stdin); + + if (size != 1) { + fprintf(stderr, "Could not read input from stdin\n"); + return EXIT_FAILURE; + } /* don't try to execute illegal (unimplemented) instructions) caller * should have checked this and keep worker simple -- 2.51.0