From patchwork Mon Oct 7 14:49:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yafang Shao X-Patchwork-Id: 13824860 X-Patchwork-Delegate: paul@paul-moore.com Received: from mail-pf1-f172.google.com (mail-pf1-f172.google.com [209.85.210.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 383971D45E0; Mon, 7 Oct 2024 14:49:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728312598; cv=none; b=XNgIIZL2uoc1Smgwtx9YCZym9hqDnb7iHOrdmqqgmsrqwOkoh1RhvacdJifnHGt38yp2Yc0e/rZfUocQsn7HoanvD82lDERvYjjz7EvfK3DxZNf9+JRdEq9Hhm24dm26WOCxXdndzjbkzOc1C1iajByhsvhuHfR5GOoSBw6oFn4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728312598; c=relaxed/simple; bh=t9WhBzpj3y3CJ8rlJO5jv9hSArYMQate1NnQ3e0C/oY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=fPfx+eOY/HdvokDGxj5u/9sY0zRrd228qxbclbKZsSQBQxZ86KeFtq50eIJ29x+YFyP6AL8w+8u4/7qrnCKV8yB9yH0eTZxSjFuSLvyr7Rz+W/wVTiadUxxEutj3hv71KEf1s4O76QkZMABoTcVRRzbTti79bwbJVXqsmPLHEN8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=bA8Y7tfd; arc=none smtp.client-ip=209.85.210.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bA8Y7tfd" Received: by mail-pf1-f172.google.com with SMTP id d2e1a72fcca58-71dfccba177so1136022b3a.0; Mon, 07 Oct 2024 07:49:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1728312596; x=1728917396; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=4ED8sTWekie9637+cHBCmQFpLStnm64j/0llImVgOxU=; b=bA8Y7tfdPirlVKHrNdcCeQnVOw9nz6iMWNHsLrDEuuMZ7L76jfoBSsZHLRqD7NuzSJ E1OLKwCEjGcJhwR+hrP3yzhwjuswzp9NmgiaTbfcjz/aY41KAZaX/UAclMte31qkJUbu JjyX/YCfJGEZfY9w8Q9LcQMBhkDNx8uzTJBjuxbt/SxHSznopEyz5ElKRlLmnojW/r1+ munJMNU8pvgVEe9MBNcRxooPnc+NSTDU8gUPfp3zKQTzzCYJQFI3J/I+Oc5QnzD7gK0c r1JWonebEsqQHTd/QaY0ugBW84YJ+eMlQ3Hc4mUuvOC52M53NNMWWgBGo+uScy/oH8VU RagA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728312596; x=1728917396; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=4ED8sTWekie9637+cHBCmQFpLStnm64j/0llImVgOxU=; b=hXrNJv48v8jAIq09+tWuNkWcW1H+g9LK/wnxHZSrCVzQMX5npsvN9yk+9sn2NWpik9 A5bcQ43qVtPzamBhXXPMBdlW/VQ2gPwm0TjZMHSAmfimK0D03PtunpGifuPo2MTSaX46 a9yw13bpSNl1lDFESrZFDuWs7Nh/WPeL79bl+69W1nXklobcGi8qoTeNFXYE6uSlA68y 90y0icO4XPHya0CpYLeHwDMBTJM9HNtClERWeqEXRVLOhM7ncdpP46XoQebMEWkEeACf iKsmWAfiD91ICL21m1ztRZ7KKraj4NmHsee7sUC2/PXN4IVAIGDP8LamWg5BdtGmOEH6 NmNA== X-Forwarded-Encrypted: i=1; AJvYcCU86TkYgcmqLcjl/R+0XP/A0d0JE5jPpL/CILO2z9u7KIGeiUvo0wBbLgTB3NRYMmTeYV+Jbl6yvA==@vger.kernel.org, AJvYcCUxXefIf7yFoslmrrd/rnZyZ8HXSOnWol9wS5lsJidP4M/TG9Dg1HWvlWKyhOmHNq4ux5Q0@vger.kernel.org, AJvYcCVBPsuCWBOs2EfwDhupOxZIMubYXEzVHBTM6koaOi+i9NREROtJzREnDaezjN+/anUZrd9CR2RcVYN11IVuIZyqfKWjk3ZN@vger.kernel.org, AJvYcCVdIzPyQLfae2wSNa+WNhu8bJ0n8QNMPn1Qdn/feOHlnFECM+dblKKumfdZDzA/wLNFvX0i1WQsvfgK7tK8rA==@vger.kernel.org, AJvYcCWYJH4+UrWregNJ3mjZycRIch3uzp+EYIfeEl+bSt6Da6TNq9txQslhTDj8cIsrFH6Du7zXmw==@vger.kernel.org, AJvYcCWlx5DSeoGHNG4q1Pw6ncXtyuLKj2wEIJP5nlS4gFQB/FpBtlP/Y717Rv+KQETarubCdNQP8FtU@vger.kernel.org, AJvYcCXzGSgw23kAIBkk/imeP+QmFGf2ghSym5k8Ofh1YyZwUQw8+AJvXTFR0qx9CQh1JDDn4YO7+DOQt65BZEksPznX5Gc5@vger.kernel.org X-Gm-Message-State: AOJu0YyfTqqZEoWZ7hBh7aq5mgOFmlIhKdCNYd6erIyRscROU1kMx1yf zHXAH5zq5nhbOEiNRRh6j+jWaRNdfHN8E38QJaCTfXEoa8EurMpa X-Google-Smtp-Source: AGHT+IFSfr8aGR6hntBNP4HQUskHiw0vm/RzkrWx6VpNUZENgDQ4iLauIOQbi4o7xjraSFHRBCGRjw== X-Received: by 2002:a05:6a00:2316:b0:71e:1ad:a4a2 with SMTP id d2e1a72fcca58-71e01adb733mr6378569b3a.13.1728312596499; Mon, 07 Oct 2024 07:49:56 -0700 (PDT) Received: from localhost.localdomain ([223.104.210.43]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-71df0d7cf82sm4466432b3a.200.2024.10.07.07.49.45 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 07 Oct 2024 07:49:56 -0700 (PDT) From: Yafang Shao To: akpm@linux-foundation.org Cc: torvalds@linux-foundation.org, keescook@chromium.org, alx@kernel.org, justinstitt@google.com, ebiederm@xmission.com, alexei.starovoitov@gmail.com, rostedt@goodmis.org, catalin.marinas@arm.com, 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 , Paul Moore , Eric Paris Subject: [PATCH v9 2/7] auditsc: Replace memcpy() with strscpy() Date: Mon, 7 Oct 2024 22:49:06 +0800 Message-Id: <20241007144911.27693-3-laoar.shao@gmail.com> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20241007144911.27693-1-laoar.shao@gmail.com> References: <20241007144911.27693-1-laoar.shao@gmail.com> Precedence: bulk X-Mailing-List: selinux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Using strscpy() 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 Acked-by: Paul Moore Reviewed-by: Justin Stitt Cc: Eric Paris --- kernel/auditsc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index cd57053b4a69..7adc67d5aafb 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -2730,7 +2730,7 @@ void __audit_ptrace(struct task_struct *t) context->target_uid = task_uid(t); context->target_sessionid = audit_get_sessionid(t); security_task_getsecid_obj(t, &context->target_sid); - memcpy(context->target_comm, t->comm, TASK_COMM_LEN); + strscpy(context->target_comm, t->comm); } /** @@ -2757,7 +2757,7 @@ int audit_signal_info_syscall(struct task_struct *t) ctx->target_uid = t_uid; ctx->target_sessionid = audit_get_sessionid(t); security_task_getsecid_obj(t, &ctx->target_sid); - memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN); + strscpy(ctx->target_comm, t->comm); return 0; } @@ -2778,7 +2778,7 @@ int audit_signal_info_syscall(struct task_struct *t) axp->target_uid[axp->pid_count] = t_uid; axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t); security_task_getsecid_obj(t, &axp->target_sid[axp->pid_count]); - memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN); + strscpy(axp->target_comm[axp->pid_count], t->comm); axp->pid_count++; return 0;