+ tmpfs-dont-undo-fallocate-past-its-last-page.patch added to -mm tree

The patch titled
     Subject: tmpfs: don't undo fallocate past its last page
has been added to the -mm tree.  Its filename is
     tmpfs-dont-undo-fallocate-past-its-last-page.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/tmpfs-dont-undo-fallocate-past-its-last-page.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/tmpfs-dont-undo-fallocate-past-its-last-page.patch

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------------------------------------------------------
From: Anthony Romano <redacted>
Subject: tmpfs: don't undo fallocate past its last page

When fallocate is interrupted it will undo a range that extends one byte
past its range of allocated pages.  This can corrupt an in-use page by
zeroing out its first byte.  Instead, undo using the inclusive byte range.

Fixes: 1635f6a74152f1d ("tmpfs: undo fallocation on failure")
Link: http://lkml.kernel.org/r/1462713387-16724-1-git-send-email-anthony.romano@coreos.com
Signed-off-by: Anthony Romano <redacted>
Cc: Vlastimil Babka <redacted>
Cc: Hugh Dickins <hughd@google.com>
Cc: <redacted>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/shmem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN mm/shmem.c~tmpfs-dont-undo-fallocate-past-its-last-page mm/shmem.c

--- a/mm/shmem.c~tmpfs-dont-undo-fallocate-past-its-last-page
+++ a/mm/shmem.c

@@ -2227,7 +2227,7 @@ static long shmem_fallocate(struct file
 			/* Remove the !PageUptodate pages we added */
 			shmem_undo_range(inode,
 				(loff_t)start << PAGE_SHIFT,
-				(loff_t)index << PAGE_SHIFT, true);
+				((loff_t)index << PAGE_SHIFT) - 1, true);
 			goto undone;
 		}
 

_

Patches currently in -mm which might be from anthony.romano@coreos.com are

tmpfs-dont-undo-fallocate-past-its-last-page.patch