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| author | Vincent Donnefort <vdonnefort@google.com> | 2026-08-06 22:13:02 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2026-08-08 22:23:45 -0400 |
| commit | bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 (patch) | |
| tree | d7a3d1a878959b3a450e537ff8271db1716d8b22 /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | 7c727dfce6be04dd009b29091a4a17d952dbfe03 (diff) | |
ring-buffer: Prevent subbuf order change when resizing is disabled
Because ring_buffer_subbuf_order_set() frees buffer pages, we can't
allow it when resizing is disabled. A non-consuming reader is at risk of
use-after-free (rb_advance_iter()).
Return -EBUSY on resize_disabled, matching ring_buffer_resize()
behaviour.
Cc: stable@vger.kernel.org
Fixes: f9b94daa542a ("ring-buffer: Set new size of the ring buffer sub page")
Link: https://patch.msgid.link/20260806211306.3704194-3-vdonnefort@google.com
Reported-by: syzbot+e0cc44465d6bae735679@syzkaller.appspotmail.com
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions