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 90F7E35CB69; Thu, 12 Feb 2026 14:14:51 +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=1770905691; cv=none; b=sS8d/Tj+cKNhAKGVOW75M8dA0lsDu3wQkJyGQaFaNG/xsBzSh0bVXZVj4oDmFXKjTVP1pas5i4BQX5ohyrYda01fb+IYFxQsnV46KIZwHm7zZInGQVwYVo7tfmLOygeV9IPnZK+uMPiYQbdD5zuLWIrPQDAifrkh1EZTGlj0WkE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770905691; c=relaxed/simple; bh=RdzQsLETYKvlriLm/NMGW7KYXfnHS0fq0aSeOOeoJXM=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=Hha+tGHRoOjxV197JIAe5QNS+J7FNkP8d6LYeCyQNTOptIf6rDiKONaSjKMDshVltqGaql8ctv5xy0rLUwi/ZuieSTgIVj1QNqlTttdIinEWjCjZmRti5333jJtqXxzWG/ArCytY5XTWI/OZa3voHPSBUGHPHyttlmb4efGYDVI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=U6+72HzA; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="U6+72HzA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 42A82C16AAE; Thu, 12 Feb 2026 14:14:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770905691; bh=RdzQsLETYKvlriLm/NMGW7KYXfnHS0fq0aSeOOeoJXM=; h=Date:From:To:Cc:Subject:References:From; b=U6+72HzAW8FxFV6oUXlwSZk2p48eMlFl3nXeoy38Tj5xmoYh2SkIijLNBHo9lKnFC /nQhQSLw0DC9KoLy8ndz6ZAT8ms2208rxf4RnObv37l3QNmrEUpYQYfTLEvH4RxvmS myEitn3p35eyio47PqLzx5M9TMX7n+FdLRkhRjGpLYfjXW1NN8arvxmR8bKdtFcT9/ cdv51Kyoio1vOzu5v3V7sUH3C9DenPz+Gs8VQd5KG/hUg5XfnGzOM7ldH6Nc81Osuk IL+QkGMQZFRhwfdfDSGVO3/ANwUrO6ljO3n8ufFj/XRdb0+x40zcjq1BmAGqg1QnSV Z6ak7yDdnWhCQ== Received: from rostedt by gandalf with local (Exim 4.99.1) (envelope-from ) id 1vqXT0-000000002lq-1q1L; Thu, 12 Feb 2026 09:14:50 -0500 Message-ID: <20260212141450.296763331@kernel.org> User-Agent: quilt/0.69 Date: Thu, 12 Feb 2026 09:14:34 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , stable@vger.kernel.org Subject: [for-next][PATCH 1/3] tracing: Fix to set write permission to per-cpu buffer_size_kb References: <20260212141433.849771751@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 From: "Masami Hiramatsu (Google)" Since the per-cpu buffer_size_kb file is writable for changing per-cpu ring buffer size, the file should have the write access permission. Cc: stable@vger.kernel.org Cc: Mathieu Desnoyers Link: https://patch.msgid.link/177071301597.2293046.11683339475076917920.stgit@mhiramat.tok.corp.google.com Fixes: 21ccc9cd7211 ("tracing: Disable "other" permission bits in the tracefs files") Signed-off-by: Masami Hiramatsu (Google) Signed-off-by: Steven Rostedt (Google) --- kernel/trace/trace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 845b8a165daf..fd470675809b 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -8613,7 +8613,7 @@ tracing_init_tracefs_percpu(struct trace_array *tr, long cpu) trace_create_cpu_file("stats", TRACE_MODE_READ, d_cpu, tr, cpu, &tracing_stats_fops); - trace_create_cpu_file("buffer_size_kb", TRACE_MODE_READ, d_cpu, + trace_create_cpu_file("buffer_size_kb", TRACE_MODE_WRITE, d_cpu, tr, cpu, &tracing_entries_fops); if (tr->range_addr_start) -- 2.51.0