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AJvYcCVbnFPCj+p+xXZ6m/azxpwRVREeNsEZ3eqAxIeSoHf8vVyT2d+BkeyZZ5/8t6oudi/PhLDaYOZdIv71KV2vAZ3DjOyzWCMJxxaBTXSR3lBvRUO3HudjnPjAqRg1M6TYCM9kxYmS85F4BjliVFxhLM1oLJ+FgowujWppac04NaMkhbpyX0cJuI4OzAVZmjtNLW4DPiqrsFdhJcseNL16zLb9Pl8PIYfkR71P2weG/l7D/GLT8O3/Z7k00tU+2v8ZSG+rOAheR6g+IjFvTBGaTHr2MxD94RuY/4wPEca8NaqVl/8OqpaFMXS7gTqBMeRnMoPYJ6k5qw== X-Gm-Message-State: AOJu0Yy8L+4d+l6Y5eHOW7VmC/Rrh275UE5m2M8QWE+6xnFWvt+4Wmnk HX1QpgieJHZfIfgOXyn56EjwFuvR2/73MRgXnOsgh5fcUbOVVHs8 X-Google-Smtp-Source: AGHT+IEDLpdYIw99Uz7LWzb9Zy/b+1+lbeIcbqra7aNgXOpLlSyDlDvG9wKvxKsFRnB2arbPqu9IVw== X-Received: by 2002:a05:6808:130b:b0:3d2:4a08:2cc8 with SMTP id 5614622812f47-3d51b9b4558mr8069073b6e.23.1718937121450; Thu, 20 Jun 2024 19:32:01 -0700 (PDT) Received: from localhost.localdomain ([39.144.105.24]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-706511944d2sm332488b3a.70.2024.06.20.19.31.52 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 20 Jun 2024 19:32:00 -0700 (PDT) From: Yafang Shao To: torvalds@linux-foundation.org Cc: ebiederm@xmission.com, alexei.starovoitov@gmail.com, rostedt@goodmis.org, catalin.marinas@arm.com, akpm@linux-foundation.org, penguin-kernel@i-love.sakura.ne.jp, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, audit@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Yafang Shao Subject: [PATCH v3 08/11] tsacct: Replace strncpy() with __get_task_comm() Date: Fri, 21 Jun 2024 10:29:56 +0800 Message-Id: <20240621022959.9124-9-laoar.shao@gmail.com> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20240621022959.9124-1-laoar.shao@gmail.com> References: <20240621022959.9124-1-laoar.shao@gmail.com> Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Using __get_task_comm() to read the task comm ensures that the name is always NUL-terminated, regardless of the source string. This approach also facilitates future extensions to the task comm. Signed-off-by: Yafang Shao --- kernel/tsacct.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/tsacct.c b/kernel/tsacct.c index 4252f0645b9e..6b094d5d9135 100644 --- a/kernel/tsacct.c +++ b/kernel/tsacct.c @@ -76,7 +76,7 @@ void bacct_add_tsk(struct user_namespace *user_ns, stats->ac_minflt = tsk->min_flt; stats->ac_majflt = tsk->maj_flt; - strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm)); + __get_task_comm(stats->ac_comm, sizeof(stats->ac_comm), tsk); }