This is a note to let you know that I've just added the patch titled
s390/cio: fix a memleak in css_alloc_subchannel
to the 6.5-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:
s390-cio-fix-a-memleak-in-css_alloc_subchannel.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 63e8b94ad1840f02462633abdb363397f56bc642 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Date: Thu, 21 Sep 2023 15:14:12 +0800
Subject: s390/cio: fix a memleak in css_alloc_subchannel
From: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
commit 63e8b94ad1840f02462633abdb363397f56bc642 upstream.
When dma_set_coherent_mask() fails, sch->lock has not been
freed, which is allocated in css_sch_create_locks(), leading
to a memleak.
Fixes: 4520a91a976e ("s390/cio: use dma helpers for setting masks")
Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Message-Id: <20230921071412.13806-1-dinghao.liu@xxxxxxxxxx>
Link: https://lore.kernel.org/linux-s390/bd38baa8-7b9d-4d89-9422-7e943d626d6e@xxxxxxxxxxxxx/
Reviewed-by: Halil Pasic <pasic@xxxxxxxxxxxxx>
Reviewed-by: Peter Oberparleiter <oberpar@xxxxxxxxxxxxx>
Signed-off-by: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/s390/cio/css.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -233,17 +233,19 @@ struct subchannel *css_alloc_subchannel(
*/
ret = dma_set_coherent_mask(&sch->dev, DMA_BIT_MASK(31));
if (ret)
- goto err;
+ goto err_lock;
/*
* But we don't have such restrictions imposed on the stuff that
* is handled by the streaming API.
*/
ret = dma_set_mask(&sch->dev, DMA_BIT_MASK(64));
if (ret)
- goto err;
+ goto err_lock;
return sch;
+err_lock:
+ kfree(sch->lock);
err:
kfree(sch);
return ERR_PTR(ret);
Patches currently in stable-queue which might be from dinghao.liu@xxxxxxxxxx are
queue-6.5/s390-cio-fix-a-memleak-in-css_alloc_subchannel.patch
