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Patch "IB/core: disable memory registration of filesystem-dax vmas" has been added to the 4.14-stable tree

PATCH [email protected] 1 participant 1 message Dec 4, 2017

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

IB/core: disable memory registration of filesystem-dax vmas

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:
ib-core-disable-memory-registration-of-filesystem-dax-vmas.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 <[email protected]> know about it.

Quoted 1 line

From 5f1d43de54164dcfb9bfa542fcc92c1e1a1b6c1d Mon Sep 17 00:00:00 2001

From: Dan Williams <[email protected]>
Date: Wed, 29 Nov 2017 16:10:47 -0800
Subject: IB/core: disable memory registration of filesystem-dax vmas

From: Dan Williams <[email protected]>

commit 5f1d43de54164dcfb9bfa542fcc92c1e1a1b6c1d upstream.

Until there is a solution to the dma-to-dax vs truncate problem it is not safe to allow RDMA to create long standing memory registrations against filesytem-dax vmas.

Link http://lkml.kernel.org/r/151068941011.7446.7766030590347262502.stgit@dwillia2-desk3.amr.corp.intel.com open here
Fixes 3565fce3a659 ("mm, x86: get_user_pages() for dax mappings")
Signed-off-by Dan Williams <[email protected]>
Reported-by Christoph Hellwig <[email protected]>
Reviewed-by Christoph Hellwig <[email protected]>
Acked-by Jason Gunthorpe <[email protected]>
Acked-by Doug Ledford <[email protected]>
Cc Sean Hefty <[email protected]>
Cc Hal Rosenstock <[email protected]>
Cc Jeff Moyer <[email protected]>
Cc Ross Zwisler <[email protected]>
Cc Inki Dae <[email protected]>
Cc Jan Kara <[email protected]>
Cc Joonyoung Shim <[email protected]>
Cc Kyungmin Park <[email protected]>
Cc Mauro Carvalho Chehab <[email protected]>
Cc Mel Gorman <[email protected]>
Cc Seung-Woo Kim <[email protected]>
Cc Vlastimil Babka <[email protected]>
Signed-off-by Andrew Morton <[email protected]>
Signed-off-by Linus Torvalds <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/infiniband/core/umem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/infiniband/core/umem.c +1 -1
@@ -191,7 +191,7 @@ struct ib_umem *ib_umem_get(struct ib_uc
 	sg_list_start = umem->sg_head.sgl;
 
 	while (npages) {
-		ret = get_user_pages(cur_base,
+		ret = get_user_pages_longterm(cur_base,
 				     min_t(unsigned long, npages,
 					   PAGE_SIZE / sizeof (struct page *)),
 				     gup_flags, page_list, vma_list);

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/mm-hugetlbfs-introduce-split-to-vm_operations_struct.patch queue-4.14/ib-core-disable-memory-registration-of-filesystem-dax-vmas.patch queue-4.14/mm-introduce-get_user_pages_longterm.patch queue-4.14/mm-fail-get_vaddr_frames-for-filesystem-dax-mappings.patch queue-4.14/device-dax-implement-split-to-catch-invalid-munmap-attempts.patch queue-4.14/v4l2-disable-filesystem-dax-mapping-support.patch queue-4.14/mm-fix-device-dax-pud-write-faults-triggered-by-get_user_pages.patch queue-4.14/mm-madvise.c-fix-madvise-infinite-loop-under-special-circumstances.patch