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t=1788862486; bh=Cvq4qMjanLuwG3YSjMLX9OxK6QvsahWFeb4aWNdZaXM=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=iz9xURpWnnx+dU5/HrM8VQO5BbUDBW7rvyOLEuiLWetDXdQ8k9sBR4ImmLdNM+Dla N9Dfp7sOUwRPAKQbqdb/YMlpm5hpy6WKAwoioZvsKkWesFetbmX/dgCDD7SwWw0Sh8 sdrThQmQVgTDomTp7h5cUd70qq67m8ahaB44eFW7y5LRfCBqUDMACXcX8xpnkJgR90 ThiuAAAiaifndll5OnzG754tijKFWr3abF20Ynl6N13OEEvqTD5p/YrmKZ8l2+CuLy 4e9UVv2pB0x39Ake1gvwn527QYcC2r9cUvKByu65tH2hoLFf2vOU18urhhaoqRuR1Q lT+RtcZM6i4Wg== Message-ID: Date: Tue, 8 Sep 2026 12:14:41 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] selftests/mm: Only prepare ptrace_scope when memfd_secret is selected To: Tianyi Chen , Andrew Morton Cc: shuah@kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, jsavitz@redhat.com References: <20260906135444.749144-1-hi@tychen.cc> <178886112560.138404.1278745290043112298.mm-cli-v2-0@tychen.cc> <178886112560.138404.8930658836608223518.mm-cli-v2-2@tychen.cc> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 3E56912000E X-Stat-Signature: crcrggfe7s15hthmyzihogzk9w8tmxup X-Rspam-User: X-HE-Tag: 1788862487-774901 X-HE-Meta: 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 iK4SiMkP RVQITtByvZ/xL76aq5fKR96xO6VSlvStLHQN0JMuywvCw4mZCu6AwYMiG5uImUAoCyDrK3CpbvlsbX+0+5Hg3+tfkFwhTOfwh3Z69MghmXBvCrbFCdCsuOeU77KSPxl8bA+XANkbfLT6ryuyGmp+FeIrQi7VR/oK0gGMMz7P8WNwnsrB4diXJbGSnzdgOEIz9OOWfpKwQdViz4dJwVb+/+4VZ1fQbjC7sL3/7nNhuP57eS4JH97RmEvz/aK4l8NBLYP03IGKxbZPKu8aWwzraGxfP9RO6AJUj3484G5wSKCmwDz+YHmbqxY/ybOj1XCL55wpl0Fvn1IWAGEI= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/8/26 11:55, Tianyi Chen wrote: > The memfd_secret setup clears ptrace_scope whenever its test binary is > executable, even when a different category was selected. run_test() filters > the test invocation, but it does not protect the preceding setup. > > Check the category selection before entering the memfd_secret block so > running unrelated categories does not change ptrace_scope. Keep the > existing executable check and the behavior when memfd_secret is selected. > > Assisted-by: Codex:GPT-6 We prefer Assisted-by: LLM now > Signed-off-by: Tianyi Chen > --- > tools/testing/selftests/mm/run_vmtests.sh | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh > index 836c7454cba..9932df252f4 100755 > --- a/tools/testing/selftests/mm/run_vmtests.sh > +++ b/tools/testing/selftests/mm/run_vmtests.sh > @@ -371,7 +371,7 @@ CATEGORY="process_madv" run_test ./process_madv > > CATEGORY="vma_merge" run_test ./merge > > -if [ -x ./memfd_secret ] > +if test_selected "memfd_secret" && [ -x ./memfd_secret ] > then > if [ -f /proc/sys/kernel/yama/ptrace_scope ]; then > (echo 0 > /proc/sys/kernel/yama/ptrace_scope 2>&1) | tap_prefix Acked-by: David Hildenbrand (Arm) -- Cheers, David