This is a note to let you know that I've just added the patch titled
leds: ledtrig-tty: Free allocated ttyname buffer on deactivate
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:
leds-ledtrig-tty-free-allocated-ttyname-buffer-on-deactivate.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.
>From 25054b232681c286fca9c678854f56494d1352cc Mon Sep 17 00:00:00 2001
From: Florian Eckert <fe@xxxxxxxxxx>
Date: Mon, 27 Nov 2023 09:16:21 +0100
Subject: leds: ledtrig-tty: Free allocated ttyname buffer on deactivate
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From: Florian Eckert <fe@xxxxxxxxxx>
commit 25054b232681c286fca9c678854f56494d1352cc upstream.
The ttyname buffer for the ledtrig_tty_data struct is allocated in the
sysfs ttyname_store() function. This buffer must be released on trigger
deactivation. This was missing and is thus a memory leak.
While we are at it, the TTY handler in the ledtrig_tty_data struct should
also be returned in case of the trigger deactivation call.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: fd4a641ac88f ("leds: trigger: implement a tty trigger")
Signed-off-by: Florian Eckert <fe@xxxxxxxxxx>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231127081621.774866-1-fe@xxxxxxxxxx
Signed-off-by: Lee Jones <lee@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/leds/trigger/ledtrig-tty.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/leds/trigger/ledtrig-tty.c
+++ b/drivers/leds/trigger/ledtrig-tty.c
@@ -168,6 +168,10 @@ static void ledtrig_tty_deactivate(struc
cancel_delayed_work_sync(&trigger_data->dwork);
+ kfree(trigger_data->ttyname);
+ tty_kref_put(trigger_data->tty);
+ trigger_data->tty = NULL;
+
kfree(trigger_data);
}
Patches currently in stable-queue which might be from fe@xxxxxxxxxx are
queue-5.15/leds-ledtrig-tty-free-allocated-ttyname-buffer-on-deactivate.patch
