This is a note to let you know that I've just added the patch titled
devm_memremap_release(): fix memremap'd addr handling
to the 4.4-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:
devm_memremap_release-fix-memremap-d-addr-handling.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9273a8bbf58a15051e53a777389a502420ddc60e Mon Sep 17 00:00:00 2001
From: Toshi Kani <toshi.kani@xxxxxxx>
Date: Wed, 17 Feb 2016 13:11:29 -0800
Subject: devm_memremap_release(): fix memremap'd addr handling
From: Toshi Kani <toshi.kani@xxxxxxx>
commit 9273a8bbf58a15051e53a777389a502420ddc60e upstream.
The pmem driver calls devm_memremap() to map a persistent memory range.
When the pmem driver is unloaded, this memremap'd range is not released
so the kernel will leak a vma.
Fix devm_memremap_release() to handle a given memremap'd address
properly.
Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx>
Acked-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/memremap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -111,7 +111,7 @@ EXPORT_SYMBOL(memunmap);
static void devm_memremap_release(struct device *dev, void *res)
{
- memunmap(res);
+ memunmap(*(void **)res);
}
static int devm_memremap_match(struct device *dev, void *res, void *match_data)
Patches currently in stable-queue which might be from toshi.kani@xxxxxxx are
queue-4.4/x86-uaccess-64-handle-the-caching-of-4-byte-nocache-copies-properly-in-__copy_user_nocache.patch
queue-4.4/devm_memremap_release-fix-memremap-d-addr-handling.patch
queue-4.4/x86-mm-fix-vmalloc_fault-to-handle-large-pages-properly.patch
queue-4.4/x86-uaccess-64-make-the-__copy_user_nocache-assembly-code-more-readable.patch
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