This is a note to let you know that I've just added the patch titled

dax: fix vma_is_fsdax() helper

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: dax-fix-vma_is_fsdax-helper.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@vger.kernel.org know about it.

From 230f5a8969d8345fc9bbe3683f068246cf1be4b8 Mon Sep 17 00:00:00 2001

From: Dan Williams dan.j.williams@intel.com Date: Wed, 21 Feb 2018 17:08:01 -0800 Subject: dax: fix vma_is_fsdax() helper

From: Dan Williams dan.j.williams@intel.com

commit 230f5a8969d8345fc9bbe3683f068246cf1be4b8 upstream.

Gerd reports that ->i_mode may contain other bits besides S_IFCHR. Use S_ISCHR() instead. Otherwise, get_user_pages_longterm() may fail on device-dax instances when those are meant to be explicitly allowed.

Fixes: 2bb6d2837083 ("mm: introduce get_user_pages_longterm") Cc: stable@vger.kernel.org Reported-by: Gerd Rausch gerd.rausch@oracle.com Acked-by: Jane Chu jane.chu@oracle.com Reported-by: Haozhong Zhang haozhong.zhang@intel.com Reviewed-by: Jan Kara jack@suse.cz Signed-off-by: Dan Williams dan.j.williams@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- include/linux/fs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3185,7 +3185,7 @@ static inline bool vma_is_fsdax(struct v if (!vma_is_dax(vma)) return false; inode = file_inode(vma->vm_file); - if (inode->i_mode == S_IFCHR) + if (S_ISCHR(inode->i_mode)) return false; /* device-dax */ return true; }

Patches currently in stable-queue which might be from dan.j.williams@intel.com are

queue-4.14/dax-fix-vma_is_fsdax-helper.patch queue-4.14/vfio-disable-filesystem-dax-page-pinning.patch