From: Steven Rostedt <rostedt@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Andrew Morton <akpm@linux-foundation.org>,
stable@vger.kernel.org
Subject: [for-next][PATCH 1/3] tracing: Fix to set write permission to per-cpu buffer_size_kb
Date: Thu, 12 Feb 2026 09:14:34 -0500 [thread overview]
Message-ID: <20260212141450.296763331@kernel.org> (raw)
In-Reply-To: 20260212141433.849771751@kernel.org
From: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
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 <mathieu.desnoyers@efficios.com>
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) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
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
next prev parent reply other threads:[~2026-02-12 14:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-12 14:14 [for-next][PATCH 0/3] tracing: Last minute fixes for 7.0 Steven Rostedt
2026-02-12 14:14 ` Steven Rostedt [this message]
2026-02-12 14:14 ` [for-next][PATCH 2/3] tracing: Reset last_boot_info if ring buffer is reset Steven Rostedt
2026-02-12 14:14 ` [for-next][PATCH 3/3] tracing: Fix indentation of return statement in print_trace_fmt() Steven Rostedt
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