Commit 2aa6a5e88959 for kernel

commit 2aa6a5e889594687d6617f9a0cc8a288ac236852
Merge: 0131b508c0e2 260b20d9b78b
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri Jul 31 20:24:11 2026 -0700

    Merge tag 'trace-v7.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

    Pull tracing fixes from Steven Rostedt:

     - Reset dropped_count in mmio_reset_data()

       When mmio_reset_data() is called, it does not reset the dropped_count
       so that subsequent runs will have incorrect reporting.

     - Add NULL check for mmio_trace_array in logging functions

       The functions __trace_mmiotrace_rw() and __trace_mmiotrace_map() may
       have the 'tr' variable passed to it as NULL. But they both
       dereference it without checking if it is NULL first.

     - Check return value of __register_event() in trace_module_add_events()

       If __register_event() fails, the __add_event_to_tracers() call after
       it will create a file for it. If the module fails to load and its
       memory is freed, the file will still point to it and it will not be
       removed as the registering of the event did not complete.

       Only call __add_event_to_tracers() if the __register_event() was
       successful.

     - Fix false positive match in regex_match_full()

       The regex full matching uses a strncmp() to test against the match
       string and the value. It should not match if value is a prefix of the
       string to match. Check to make sure the length of the strings match
       before comparing.

     - Fix reader page read offset for remote buffers

       A page swapped in by __rb_get_reader_page_from_remote() retains its
       stale read offset, causing subsequent reads to skip events or read
       past valid data.

     - Fix memory leak of subbuf_ids in rb_allocate_cpu_buffer()

       Remote buffers allocate a subbuf_ids array. If the allocator function
       fails after it is allocated, it does not free it, resulting in a
       memory leak.

    * tag 'trace-v7.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
      ring-buffer: Fix subbuf_ids memory leak in rb_allocate_cpu_buffer() error path
      ring-buffer: Fix reader page read offset for remote buffers
      tracing/filters: Fix false positive match in regex_match_full()
      tracing: Check return value of __register_event() in trace_module_add_events()
      tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions
      tracing/mmiotrace: Reset dropped_count in mmio_reset_data()