From 647a37ec1a17c2710103d948a748f21453aabf21 Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Thu, 14 Dec 2017 15:33:08 -0800 Subject: [PATCH] mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()' [ Upstream commit 1f704fd0d14043e76e80f6b8b2251b9b2cedcca6 ] A semaphore is acquired before this check, so we must release it before leaving. Link: http://lkml.kernel.org/r/20171211211009.4971-1-christophe.jaillet@wanadoo.fr Fixes: b7f0554a56f2 ("mm: fail get_vaddr_frames() for filesystem-dax mappings") Signed-off-by: Christophe JAILLET Acked-by: Michal Hocko Cc: Dan Williams Cc: Christian Borntraeger Cc: David Sterba Cc: Greg Kroah-Hartman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- mm/frame_vector.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/mm/frame_vector.c b/mm/frame_vector.c index 297c723..c64dca6 100644 --- a/mm/frame_vector.c +++ b/mm/frame_vector.c @@ -62,8 +62,10 @@ int get_vaddr_frames(unsigned long start, unsigned int nr_frames, * get_user_pages_longterm() and disallow it for filesystem-dax * mappings. */ - if (vma_is_fsdax(vma)) - return -EOPNOTSUPP; + if (vma_is_fsdax(vma)) { + ret = -EOPNOTSUPP; + goto out; + } if (!(vma->vm_flags & (VM_IO | VM_PFNMAP))) { vec->got_ref = true; -- 2.7.4