Patch "tracing: Have event inject files inc the trace array ref count" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    tracing: Have event inject files inc the trace array ref count

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     tracing-have-event-inject-files-inc-the-trace-array-.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 929153db87153eccdddcaa3fa8ca51a644dda458
Author: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Date:   Wed Sep 6 22:47:16 2023 -0400

    tracing: Have event inject files inc the trace array ref count
    
    [ Upstream commit e5c624f027ac74f97e97c8f36c69228ac9f1102d ]
    
    The event inject files add events for a specific trace array. For an
    instance, if the file is opened and the instance is deleted, reading or
    writing to the file will cause a use after free.
    
    Up the ref count of the trace_array when a event inject file is opened.
    
    Link: https://lkml.kernel.org/r/20230907024804.292337868@xxxxxxxxxxx
    Link: https://lore.kernel.org/all/1cb3aee2-19af-c472-e265-05176fe9bd84@xxxxxxxxxx/
    
    Cc: stable@xxxxxxxxxxxxxxx
    Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
    Cc: Mark Rutland <mark.rutland@xxxxxxx>
    Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
    Cc: Zheng Yejian <zhengyejian1@xxxxxxxxxx>
    Fixes: 6c3edaf9fd6a ("tracing: Introduce trace event injection")
    Tested-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
    Tested-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
    Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/kernel/trace/trace_events_inject.c b/kernel/trace/trace_events_inject.c
index c188045c5f976..b1fce64e126c0 100644
--- a/kernel/trace/trace_events_inject.c
+++ b/kernel/trace/trace_events_inject.c
@@ -321,7 +321,8 @@ event_inject_read(struct file *file, char __user *buf, size_t size,
 }
 
 const struct file_operations event_inject_fops = {
-	.open = tracing_open_generic,
+	.open = tracing_open_file_tr,
 	.read = event_inject_read,
 	.write = event_inject_write,
+	.release = tracing_release_file_tr,
 };