diff options
| author | Vincent Donnefort <vdonnefort@google.com> | 2026-08-06 22:13:01 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2026-08-08 22:23:18 -0400 |
| commit | 7c727dfce6be04dd009b29091a4a17d952dbfe03 (patch) | |
| tree | 84d6670616ff26ee22d7bbaa18fdf82ebfd56230 /kernel | |
| parent | 8b8292d6487c81bd57c2605a9b404b1cf8f1edfb (diff) | |
ring-buffer: Prevent resizing of persistent ring buffer
Dynamically resizing a persistent ring buffer is not possible. Disable
the feature.
Cc: stable@vger.kernel.org
Fixes: be68d63a139b ("ring-buffer: Add ring_buffer_alloc_range()")
Link: https://patch.msgid.link/20260806211306.3704194-2-vdonnefort@google.com
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 58dc8995a88d..09d502ef4c55 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -2528,6 +2528,8 @@ rb_allocate_cpu_buffer(struct trace_buffer *buffer, long nr_pages, int cpu) if (cpu_buffer->ring_meta->head_buffer) rb_meta_buffer_update(cpu_buffer, bpage); bpage->range = 1; + + atomic_inc(&cpu_buffer->resize_disabled); } else if (buffer->remote) { struct ring_buffer_desc *desc = ring_buffer_desc(buffer->remote->desc, cpu); |