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| author | David Carlier <devnexen@gmail.com> | 2026-10-16 07:16:35 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2026-10-16 11:40:17 -0400 |
| commit | 5a6bd62f09147b49b31fd19d4eba122cb5f941a1 (patch) | |
| tree | f992db559b382c85ea81f695f154023300255652 /scripts/Makefile.thinlto | |
| parent | 66877a312ae3c2c3d849e82e882f642ffd4ec3e2 (diff) | |
| download | linux-next-5a6bd62f09147b49b31fd19d4eba122cb5f941a1.tar.gz linux-next-5a6bd62f09147b49b31fd19d4eba122cb5f941a1.zip | |
tracing: Hold trace_types_lock when resetting last boot data from readers
update_last_data_if_empty() is called from tracing_open() with O_TRUNC,
tracing_read_pipe() and tracing_buffers_read() without trace_types_lock.
Two readers can both pass the LAST_BOOT test and free module_delta
twice, and a module notifier can update module_delta while it is being
freed.
Take trace_types_lock in those paths and keep the callers that already
hold it on an unlocked variant.
Cc: stable@vger.kernel.org
Fixes: 32dc0042528d ("tracing: Reset last-boot buffers when reading out all cpu buffers")
Link: https://patch.msgid.link/20261016061638.214847-2-devnexen@gmail.com
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'scripts/Makefile.thinlto')
0 files changed, 0 insertions, 0 deletions