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authorDmitry Safonov <dsafonov@virtuozzo.com>2016-09-05 16:33:03 +0300
committerThomas Gleixner <tglx@linutronix.de>2016-09-14 21:28:08 +0200
commite38447ee1f487eaccdbef4a61dc064f4ae94e2fa (patch)
tree2ae3bbee91a141530c1787d74cc683b5e7fab678 /arch/x86/entry/vdso/vma.c
parent9395452b4aab7bc2475ef8935b4a4fb99d778d70 (diff)
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 <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>
Diffstat (limited to 'arch/x86/entry/vdso/vma.c')
-rw-r--r--arch/x86/entry/vdso/vma.c6
1 files 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;