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 6AA963DAAC4; Thu, 17 Sep 2026 17:12:36 +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=1789665157; cv=none; b=UJmuW+/9yrGVAoOqYBsGJOTWXCY0LuQCbfTYsOgs35vLgzMXQhfiLrTfVOF2BxArejubb5p0HLLQZ88+Js+ULbVmYwsbxKEyr0tMSxadCX9DLCT4z144MYGGCjm9ZIFFFB/bPp1nlI1hBu/HU3svvju0VtMMtwYE7kJ1nQCAVjE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789665157; c=relaxed/simple; bh=K8Ww0U9UYkmo3k7qSCkDXbww++SpjumCrH48WV28y04=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=vDNxopOYFn5NGl3ouXyre3ht3rv21f03a2hi2xwLgxyJgzQZbjEs08COpwY4vIv1NlmyEk3FItWDnHSFlfg9d++s5xa9go+rrmh2yc7ablRdsckzyKHa3bbLd2d4Uspk+DmSy+/md6GZyNhLivMJ7S5OJQdWL8Dtl6tbZURLvtE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=JD5OpBj4; 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="JD5OpBj4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C128F1F000FF; Thu, 17 Sep 2026 17:12:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789665156; bh=ptJRfzSXK7S2miLoJde++dFkqKY+OT/ZJE5P3f+YXZI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=JD5OpBj4zb3GuC4vvFkLXsbsHk5JbsUCDPTEzwswrddLA5Rcx1wDuj1TvLM0j7QL0 jqcGsYk4KaWqY0II/jte/3N2mvUVzlzM/XGCS4mr28Di+lhmWN5QVYN4NUcdlwlKGe 7HHtyfd1P3SB3Gya+kd8sgKrXgvCeKZJALKmt3Iw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hongfu Li , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Tejun Heo , Sasha Levin Subject: [PATCH 6.18 0612/1250] selftests/cgroup: Fix cg_run_in_subcgroups ignoring arg parameter Date: Thu, 17 Sep 2026 16:06:47 +0100 Message-ID: <20260917151608.464134057@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260917151551.901433442@linuxfoundation.org> References: <20260917151551.901433442@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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Hongfu Li [ Upstream commit a8c6daab4b0e276508b7ffdd66c60fd3020a9178 ] cg_run_in_subcgroups() discards its arg and always passes NULL to cg_run(), turning the (void *)100 from test_kmem_dead_cgroups() into NULL so no allocation occurs. This makes test_kmem_dead_cgroups() falsely pass without exercising the "dying cgroup with charged slab" scenario it intends to test. Pass the arg through to cg_run() to fix this. Fixes: 933dc80ec262 ("kselftests: cgroup: add kernel memory accounting tests") Signed-off-by: Hongfu Li Reviewed-by: Michal Koutný Signed-off-by: Tejun Heo Signed-off-by: Sasha Levin --- tools/testing/selftests/cgroup/test_kmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/test_kmem.c b/tools/testing/selftests/cgroup/test_kmem.c index 63b3c9aad399a..b362eb9f18409 100644 --- a/tools/testing/selftests/cgroup/test_kmem.c +++ b/tools/testing/selftests/cgroup/test_kmem.c @@ -144,7 +144,7 @@ static int cg_run_in_subcgroups(const char *parent, return -1; } - if (cg_run(child, fn, NULL)) { + if (cg_run(child, fn, arg)) { cg_destroy(child); free(child); return -1; -- 2.53.0