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 CFD5A2D73B9; Sun, 1 Mar 2026 01:38:23 +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=1772329103; cv=none; b=lxgLrl7WS9CRrZxOcwFw+nA1MU4E2enoRuRx3bM3osJpG7P0efK/n+v7YX3vbgPinTZktpmV2DkO87X+a72NqIVLxNsBeFtfb4WXsA5dpHBU6lFv0pTlr/KvzorgOgB2wBtnG93ii7BU0lUQmmMHqsttYFqD9d+9y9OUADt9Bz8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772329103; c=relaxed/simple; bh=O/3DcdvvN7+KnCHbqZ3OAkyMMySeF3Ri6rNVMol3vvQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=QFuClWNMf6Em0YaSC8xtLrEDA3V0ePoQcJTKGeIBY2QIWU8QHHXmJ9h6OdXPhxJQp/86zeav9UZbd2/vj7Hti9NzLJENEMCKAbg+RcWty8NYNCh0+BO5VoK+vtgY0EaLsYYg9h1PUuYvarmXqCe4RU8iUmVyyUPG6xJsdd+/Beo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tNbFDsEA; 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="tNbFDsEA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02845C19421; Sun, 1 Mar 2026 01:38:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772329103; bh=O/3DcdvvN7+KnCHbqZ3OAkyMMySeF3Ri6rNVMol3vvQ=; h=From:To:Cc:Subject:Date:From; b=tNbFDsEAXekkV1kn1Qkf8IO1zK0iejiDV7DerAarcJ+rjNGMu+MEPnl7W0GQ2X9Vz 6TBfLbxIdHs8pQgd6XhR84yUlJNg1v5vjKYAFDEyYfG+IvPjjfRIBimLds+TRTY2jD mMwfuyCTR8QIBkfS7k37I5srYyOAnfFjVj4Emvide4P19dlySUmP1WE0VMp2hppBDo EJYvtnxeD0EZqsV+p7kGMHRHMq1UMi+NYaypmMzVceYRzH54hl8tDDSMrocFMwzeps 8UGMgJxetig5DUNOQSz1HnynK+DCT6JruvRyPmDbWM74EDyyIn/bviS2pjwFlPwjlr 91gnjoML0oREQ== From: Sasha Levin To: stable@vger.kernel.org, mhiramat@kernel.org Cc: Mathieu Desnoyers , "Steven Rostedt (Google)" , linux-trace-kernel@vger.kernel.org Subject: FAILED: Patch "tracing: Fix to set write permission to per-cpu buffer_size_kb" failed to apply to 6.6-stable tree Date: Sat, 28 Feb 2026 20:38:21 -0500 Message-ID: <20260301013821.1698769-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Hint: ignore X-stable: review Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From f844282deed7481cf2f813933229261e27306551 Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" Date: Tue, 10 Feb 2026 17:43:36 +0900 Subject: [PATCH] tracing: Fix to set write permission to per-cpu buffer_size_kb 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 845b8a165daf3..fd470675809b3 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