From e38447ee1f487eaccdbef4a61dc064f4ae94e2fa Mon Sep 17 00:00:00 2001 From: Dmitry Safonov Date: Mon, 5 Sep 2016 16:33:03 +0300 Subject: [PATCH] x86/vdso: Unmap vdso blob on vvar mapping failure If remapping of vDSO blob failed on vvar mapping, we need to unmap previously mapped vDSO blob. Signed-off-by: Dmitry Safonov Acked-by: Andy Lutomirski 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 --- arch/x86/entry/vdso/vma.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c index f840766659a8..3bab6ba3ffc5 100644 --- a/arch/x86/entry/vdso/vma.c +++ b/arch/x86/entry/vdso/vma.c @@ -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; -- 2.39.5