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b=KmC7pbG3YkOMd+7g918cdD2BpOI7oFdF9qnxui4hsUok0+bmX4TQNx2xAn5m2S4Nn yB+XGNZpcNY3qD/0jz8c1PuFnU1/LBikJ8pBFdOAsdxM3Vlds9dLZ86Sh+2sCK3KpS 6GWOO1GI2JW805fbb2WbpIewsPcpabhvN7rmD/4zDwKqkZbS8odntB1+IotOKxj30Q Z8l9oPUDZsHJaceCN/AFGIIF6RmQdtMgTpoPMbmU/p7PmTqJPmKjw84h6oa7allm8c arhvyipfJC7GaPUhWm5o3sQuBb+GgrKujoaYcenSKnLoKv4Rab50MYJhdQy6k968TM ND6VLOxB6s1Ag== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , "# 5 . 15 . x" , Brendan Higgins , David Gow , damon@lists.linux.dev, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 18/22] mm/damon/tests/vaddr-kunit: handle alloc failures in damon_test_split_evenly_fail() Date: Sat, 1 Nov 2025 11:20:12 -0700 Message-ID: <20251101182021.74868-19-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251101182021.74868-1-sj@kernel.org> References: <20251101182021.74868-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 79D69C000A X-Rspamd-Server: rspam03 X-Stat-Signature: es1iy8gksr448onh4x3irtpjaiz34mqh X-HE-Tag: 1762021242-603564 X-HE-Meta: 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 RocdeFVR KXp/vxy1onO/oJ78= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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. Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Cc: # 5.15.x Signed-off-by: SeongJae Park --- mm/damon/tests/vaddr-kunit.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/mm/damon/tests/vaddr-kunit.h b/mm/damon/tests/vaddr-kunit.h index 484223f19545..1b0f21c2e376 100644 --- a/mm/damon/tests/vaddr-kunit.h +++ b/mm/damon/tests/vaddr-kunit.h @@ -256,7 +256,16 @@ static void damon_test_split_evenly_fail(struct kunit *test, 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, -- 2.47.3