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| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2017-12-15 02:33:08 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-12-15 03:00:48 +0300 |
| commit | 1f704fd0d14043e76e80f6b8b2251b9b2cedcca6 (patch) | |
| tree | 0f6c3fb84b701285161ef2f757f7c555795a826b /mm/frame_vector.c | |
| parent | 0b265c3b3b721dca03e82719ac0e15bc2c89aa3a (diff) | |
| download | linux-1f704fd0d14043e76e80f6b8b2251b9b2cedcca6.tar.xz | |
mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'
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 <christophe.jaillet@wanadoo.fr>
Acked-by: Michal 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/frame_vector.c')
| -rw-r--r-- | mm/frame_vector.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/frame_vector.c b/mm/frame_vector.c index 297c7238f7d4..c64dca6e27c2 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; |