Commit a96406d4 authored by Christophe JAILLET's avatar Christophe JAILLET Committed by Greg Kroah-Hartman

mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'

[ Upstream commit 1f704fd0 ]

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: b7f0554a ("mm: fail get_vaddr_frames() for filesystem-dax mappings")
Signed-off-by: 's avatarChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: 's avatarMichal Hocko <mhocko@suse.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: 's avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: 's avatarSasha Levin <sashal@kernel.org>
parent 4b7c09a5
......@@ -61,8 +61,10 @@ 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;
......
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