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 AFD9241D4EA; Sat, 28 Feb 2026 17:45:47 +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=1772300747; cv=none; b=bFGdROXjtJQlnMEg9fOgGO6Pe8KvE3mkl8Sp8KPL7VMPrLqSeVBEyqIA12IFWLyJ1+ED7Nw8NeEUXMuX/tRQvRDZMWVlnX5iXrJwI40hTFDVW+7C92b7a2KzHM0jvFGSMKi7QUXB/HU/js7AVPuYZvuXzOYDQbiI3eLt+ZavtW4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772300747; c=relaxed/simple; bh=uy1r3ahCTJ4rnv4BH6RukpYgDyvuCSnL7tli9AcvMuA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Vi9+BJs5q5MgQvONzj9E3gh6i4IROf4deTvZcQEp6SoLHvq1rwljHnJE8CdsSZ5m33Eml0BDHgmWRJV2PSUHaKlL5QHRAEmNtOeq10/H+H6xq4BsG4oMHWDQGZ+JqzBQs6CPm8EThVb+N/TwoeV811yktRBEa/fDHGnfBOHTKH0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rY/OGGxA; 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="rY/OGGxA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3357C116D0; Sat, 28 Feb 2026 17:45:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772300747; bh=uy1r3ahCTJ4rnv4BH6RukpYgDyvuCSnL7tli9AcvMuA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rY/OGGxAdzMGeTVsc0ousmVHOSJbTJFNEml7WHS4RHXvo7JLzehNXSz40afgEUUpv EprKTEv9BbPyhQl3oXQsBkQBfnPzGZOb3mggylojzmZBxmRRc3qwmqYh0dslnuxnxn GdRoUkjENOpNh6EJjL0J6IW3Ar372Y4e8Eu6jesud6y3jeMSoJ2iGfwncVChkvmrUp 1eA76l/plbYJlX0tZcz18ewIYzvlY9n/fqzCn1IJCE8oTQjhXyvLchj1XeSZq1RV75 poO1M98u5+1jIj2kfXalTipxXe3jvbQsXrLdNoEZg1gyVT6oDEDaOAWA0AhRoLqZUn i6CtEfmXqIjjQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Masami Hiramatsu (Google)" , Mathieu Desnoyers , "Steven Rostedt (Google)" , Sasha Levin Subject: [PATCH 6.19 783/844] tracing: Fix to set write permission to per-cpu buffer_size_kb Date: Sat, 28 Feb 2026 12:31:36 -0500 Message-ID: <20260228173244.1509663-784-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228173244.1509663-1-sashal@kernel.org> References: <20260228173244.1509663-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: "Masami Hiramatsu (Google)" [ Upstream commit f844282deed7481cf2f813933229261e27306551 ] 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) Signed-off-by: Sasha Levin --- 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 8bd4ec08fb361..8e9c1bfe3ebb3 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -9398,7 +9398,7 @@ 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