linux-kernel - [PATCH 0/2] tracing: Fix filtering on string pointers

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Date:   Fri, 07 Jan 2022 17:56:55 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-kernel@...r.kernel.org
Cc:     Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Tom Zanussi <zanussi@...nel.org>
Subject: [PATCH 0/2] tracing: Fix filtering on string pointers

If filtering on an event's string pointer that happens to point into
user space, then the pointer could cause a page fault and crash the
kernel.

Also, have system call events use the temp buffer when filtering.


Steven Rostedt (2):
      tracing: Have syscall trace events use trace_event_buffer_lock_reserve()
      tracing: Add test for user space strings when filtering on string pointers

----
 kernel/trace/trace_events_filter.c | 79 +++++++++++++++++++++++++++++++++++++-
 kernel/trace/trace_syscalls.c      |  6 +--
 2 files changed, 79 insertions(+), 6 deletions(-)