This is a note to let you know that I've just added the patch titled
tracing/user_events: Fix incorrect return value for writing operation when events are disabled
to the 6.4-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-user_events-fix-incorrect-return-value-for-writing-operation-when-events-are-disabled.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f6d026eea390d59787a6cdc2ef5c983d02e029d0 Mon Sep 17 00:00:00 2001
From: sunliming <sunliming@xxxxxxxxxx>
Date: Mon, 26 Jun 2023 19:13:42 +0800
Subject: tracing/user_events: Fix incorrect return value for writing operation when events are disabled
From: sunliming <sunliming@xxxxxxxxxx>
commit f6d026eea390d59787a6cdc2ef5c983d02e029d0 upstream.
The writing operation return the count of writes regardless of whether events
are enabled or disabled. Switch it to return -EBADF to indicates that the event
is disabled.
Link: https://lkml.kernel.org/r/20230626111344.19136-2-sunliming@xxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
7f5a08c79df35 ("user_events: Add minimal support for trace_event into ftrace")
Acked-by: Beau Belgrave <beaub@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: sunliming <sunliming@xxxxxxxxxx>
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/trace/trace_events_user.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/kernel/trace/trace_events_user.c
+++ b/kernel/trace/trace_events_user.c
@@ -2096,7 +2096,8 @@ static ssize_t user_events_write_core(st
if (unlikely(faulted))
return -EFAULT;
- }
+ } else
+ return -EBADF;
return ret;
}
Patches currently in stable-queue which might be from sunliming@xxxxxxxxxx are
queue-6.4/tracing-user_events-fix-incorrect-return-value-for-writing-operation-when-events-are-disabled.patch
