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 DE8C32737EE; Fri, 9 Jan 2026 12:22:05 +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=1767961325; cv=none; b=QmYvdn1hRhHUs1bLNdUy2NFy71IbPY7IPirAN8Kw8EQYZNnG5CWNAxpkoA2KfPrH2hM5i5cC7tjp79jBNVKs6C5BH0z6DUcsE/2geWAmUol0TYsg6BuLh7/mXDn2GpqMgexNqhWkeScCNjb8ePs521unwJurjmaCzA8ucspQItc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767961325; c=relaxed/simple; bh=4wl4/xANb/4tRKX/vkdAerueqJr36wYqyob6yz5Gi/8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KKsYy2V9dB8PbxGODEbdbwVfs07LOdYpZPZ7JB42F0UxpXmbJ5bcI970PG7576hlmYF8IXIMKOVBRJ4FLRzLRLYoUyC8zSSJ84dxjuGifMXK/WsGFdSxN04I7Nexpu4wdEiiBpMhw6MR7fjjNqk+0gE7kmNRgGFZavbUPj/WNyE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=otTCANO8; 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="otTCANO8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3CF92C19421; Fri, 9 Jan 2026 12:22:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767961325; bh=4wl4/xANb/4tRKX/vkdAerueqJr36wYqyob6yz5Gi/8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=otTCANO8bICT4XFqULXmD57w96n2BHxnGhF2g4Xj+GYwFTn3n+56xRV0aE0++Xmwc 4zbq7yaQZvkpG+n2JldirYSETDytAJ5vV+A/55BDsXvYSeyLdHtSe1m/j0uaefHCcD QhHnfRJ3nwKkyjbRi7L3fkSRrQnyH4gG2Vu9c8mw= 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 6.6 706/737] mm/damon/tests/vaddr-kunit: handle alloc failures in damon_test_split_evenly_fail() Date: Fri, 9 Jan 2026 12:44:05 +0100 Message-ID: <20260109112200.630246247@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112133.973195406@linuxfoundation.org> References: <20260109112133.973195406@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: SeongJae Park commit 7890e5b5bb6e386155c6e755fe70e0cdcc77f18e upstream. damon_test_split_evenly_fail() 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/20251101182021.74868-19-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/vaddr-test.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) --- a/mm/damon/vaddr-test.h +++ b/mm/damon/vaddr-test.h @@ -250,7 +250,16 @@ static void damon_test_split_evenly_fail unsigned long start, unsigned long end, unsigned int nr_pieces) { struct damon_target *t = damon_new_target(); - struct damon_region *r = damon_new_region(start, end); + struct damon_region *r; + + if (!t) + kunit_skip(test, "target alloc fail"); + + r = damon_new_region(start, end); + if (!r) { + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } damon_add_region(r, t); KUNIT_EXPECT_EQ(test,