This is a note to let you know that I've just added the patch titled
Fix unbalanced mutex in dma_pool_create().
to the 3.16-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:
fix-unbalanced-mutex-in-dma_pool_create.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 153a9f131f50420b7ce008c94f1c6374cbc460d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= <khalasa@xxxxxxx>
Date: Thu, 18 Sep 2014 15:12:02 +0200
Subject: Fix unbalanced mutex in dma_pool_create().
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From: =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= <khalasa@xxxxxxx>
commit 153a9f131f50420b7ce008c94f1c6374cbc460d7 upstream.
dma_pool_create() needs to unlock the mutex in error case. The bug was
introduced in the 3.16 by commit cc6b664aa26d ("mm/dmapool.c: remove
redundant NULL check for dev in dma_pool_create()")/
Signed-off-by: Krzysztof Hałasa <khc@xxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/dmapool.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/dmapool.c
+++ b/mm/dmapool.c
@@ -176,7 +176,7 @@ struct dma_pool *dma_pool_create(const c
if (list_empty(&dev->dma_pools) &&
device_create_file(dev, &dev_attr_pools)) {
kfree(retval);
- return NULL;
+ retval = NULL;
} else
list_add(&retval->pools, &dev->dma_pools);
mutex_unlock(&pools_lock);
Patches currently in stable-queue which might be from khalasa@xxxxxxx are
queue-3.16/fix-unbalanced-mutex-in-dma_pool_create.patch
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