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 ADA943BF2EA; Thu, 15 Jan 2026 17:33:45 +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=1768498425; cv=none; b=QBo1kUJBwpbVjsIDU/SckBVwf8njAvc2z+xBHQW64QbFkMGagF91USHfIrzG08xXbzeqMD82dEiUs/zPx8mW+Lpqyrsg4AJ2ZWA6YVLVrlqR0srq3jtncnCIfNiSHA+Tmd1lrjRSuGBN4j4ykC1A5zpp9RsqGiXL9q+kMPHQi1s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768498425; c=relaxed/simple; bh=+VXjLMispNyYRg50jHGXqJgWBUK4XbthuAikC4vOvvY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GJCgYG7wWkdv7kfMeUC+iUZHTzhPLu4U6qtvHacu64ezcWSF8Ff1vlFS/BFC7U/NDFIiSXwfvnnZ9y34yNlfUZIXSEQwSv/EaEZCTzpBf0HRp5JcfQJ7zF7SHHeX8CQL1set29uO7p+ZMQ7uzvvz/Y/1bLKVye1lmlvG7bTs5b0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=M8mlhgGe; 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="M8mlhgGe" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 37F44C116D0; Thu, 15 Jan 2026 17:33:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768498425; bh=+VXjLMispNyYRg50jHGXqJgWBUK4XbthuAikC4vOvvY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M8mlhgGew0gwBE0IBTMO/OUjPZb7F8mzoOs0OsVhAeBr5VquQrnXaKStdW7cbespn 8h1UsaDl3pwkRa+EnhBG/9lXBUIAnpe+GUr/0tI9QqO0km4wwT/XoO2/YOZ2UyHX8j R2zK9+n0RErZ0mEg9ss6ZmMcqCBUqxPf33+jW3lY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, SeongJae Park , Brendan Higgins , David Gow , Kefeng Wang , Andrew Morton Subject: [PATCH 5.15 420/554] mm/damon/tests/core-kunit: handle memory failure from damon_test_target() Date: Thu, 15 Jan 2026 17:48:06 +0100 Message-ID: <20260115164301.446472860@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: SeongJae Park commit fafe953de2c661907c94055a2497c6b8dbfd26f3 upstream. damon_test_target() is assuming all dynamic memory allocation in it will succeed. Those are indeed likely in the real use cases since those allocations are too small to fail, but theoretically those could fail. In the case, inappropriate memory access can happen. Fix it by appropriately cleanup pre-allocated memory and skip the execution of the remaining tests in the failure cases. Link: https://lkml.kernel.org/r/20251101182021.74868-4-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park Cc: Brendan Higgins Cc: David Gow Cc: Kefeng Wang Cc: [5.15+] Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- mm/damon/core-test.h | 7 +++++++ 1 file changed, 7 insertions(+) --- a/mm/damon/core-test.h +++ b/mm/damon/core-test.h @@ -58,7 +58,14 @@ static void damon_test_target(struct kun struct damon_ctx *c = damon_new_ctx(); struct damon_target *t; + if (!c) + kunit_skip(test, "ctx alloc fail"); + t = damon_new_target(42); + if (!t) { + damon_destroy_ctx(c); + kunit_skip(test, "target alloc fail"); + } KUNIT_EXPECT_EQ(test, 42ul, t->id); KUNIT_EXPECT_EQ(test, 0u, nr_damon_targets(c));