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tracing: Fix permissions for the buffer_percent file

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commit 4f94559f40 upstream.

This file defines both read and write operations, yet it is being
created as read-only. This means that it can't be written to without the
CAP_DAC_OVERRIDE capability. Fix the permissions to allow root to write
to it without the need to override DAC perms.

Link: https://lore.kernel.org/linux-trace-kernel/20230503140114.3280002-1-omosnace@redhat.com

Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Fixes: 03329f9939 ("tracing: Add tracefs file buffer_percentage")
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ondrej Mosnacek 2023-05-03 16:01:14 +02:00 committed by Greg Kroah-Hartman
parent a22855dcaf
commit d76bfee36c
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/trace.c
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@ -9621,7 +9621,7 @@ init_tracer_tracefs(struct trace_array *tr, struct dentry *d_tracer)
tr->buffer_percent = 50;
trace_create_file("buffer_percent", TRACE_MODE_READ, d_tracer,
trace_create_file("buffer_percent", TRACE_MODE_WRITE, d_tracer,
tr, &buffer_percent_fops);
create_trace_options_dir(tr);