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x86/vdso: Unmap vdso blob on vvar mapping failure

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If remapping of vDSO blob failed on vvar mapping,
we need to unmap previously mapped vDSO blob.

Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: 0x7f454c46@gmail.com
Cc: oleg@redhat.com
Cc: linux-mm@kvack.org
Cc: gorcunov@openvz.org
Cc: xemul@virtuozzo.com
Link: http://lkml.kernel.org/r/20160905133308.28234-2-dsafonov@virtuozzo.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Dmitry Safonov 2016-09-05 16:33:03 +03:00 committed by Thomas Gleixner
parent 9395452b4a
commit e38447ee1f
1 changed files with 4 additions and 2 deletions
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6
arch/x86/entry/vdso/vma.c
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@ -238,12 +238,14 @@ static int map_vdso(const struct vdso_image *image, bool calculate_addr)
if (IS_ERR(vma)) {
ret = PTR_ERR(vma);
goto up_fail;
do_munmap(mm, text_start, image->size);
}
up_fail:
if (ret)
if (ret) {
current->mm->context.vdso = NULL;
current->mm->context.vdso_image = NULL;
}
up_write(&mm->mmap_sem);
return ret;