This is a note to let you know that I've just added the patch titled
memstick: fix memory leak if card device is never registered
to the 4.14-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:
memstick-fix-memory-leak-if-card-device-is-never-registered.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4b6d621c9d859ff89e68cebf6178652592676013 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Date: Sat, 1 Apr 2023 22:03:27 +0200
Subject: memstick: fix memory leak if card device is never registered
From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
commit 4b6d621c9d859ff89e68cebf6178652592676013 upstream.
When calling dev_set_name() memory is allocated for the name for the
struct device. Once that structure device is registered, or attempted
to be registerd, with the driver core, the driver core will handle
cleaning up that memory when the device is removed from the system.
Unfortunatly for the memstick code, there is an error path that causes
the struct device to never be registered, and so the memory allocated in
dev_set_name will be leaked. Fix that leak by manually freeing it right
before the memory for the device is freed.
Cc: Maxim Levitsky <maximlevitsky@xxxxxxxxx>
Cc: Alex Dubov <oakad@xxxxxxxxx>
Cc: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Kay Sievers <kay.sievers@xxxxxxxx>
Cc: linux-mmc@xxxxxxxxxxxxxxx
Fixes: 0252c3b4f018 ("memstick: struct device - replace bus_id with dev_name(), dev_set_name()")
Cc: stable <stable@xxxxxxxxxx>
Co-developed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Co-developed-by: Mirsad Goran Todorovac <mirsad.todorovac@xxxxxxxxxxxx>
Signed-off-by: Mirsad Goran Todorovac <mirsad.todorovac@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230401200327.16800-1-gregkh@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/memstick/core/memstick.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/memstick/core/memstick.c
+++ b/drivers/memstick/core/memstick.c
@@ -416,6 +416,7 @@ static struct memstick_dev *memstick_all
return card;
err_out:
host->card = old_card;
+ kfree_const(card->dev.kobj.name);
kfree(card);
return NULL;
}
@@ -471,8 +472,10 @@ static void memstick_check(struct work_s
put_device(&card->dev);
host->card = NULL;
}
- } else
+ } else {
+ kfree_const(card->dev.kobj.name);
kfree(card);
+ }
}
out_power_off:
Patches currently in stable-queue which might be from gregkh@xxxxxxxxxxxxxxxxxxx are
queue-4.14/memstick-fix-memory-leak-if-card-device-is-never-registered.patch
queue-4.14/nilfs2-initialize-unused-bytes-in-segment-summary-blocks.patch
