diff options
| author | Juergen Gross | 2016-06-23 07:12:27 +0200 |
|---|---|---|
| committer | David Vrabel | 2016-06-23 11:36:15 +0100 |
| commit | 1cf38741308c64d08553602b3374fb39224eeb5a (patch) | |
| tree | 4ebba7662d00f892e66bdd4cc9eb0fdd65f57c52 | |
| parent | 842775f1509054ea969f1787f38d6a0ec2ccfaba (diff) | |
x86/xen: fix upper bound of pmd loop in xen_cleanhighmap()
xen_cleanhighmap() is operating on level2_kernel_pgt only. The upper
bound of the loop setting non-kernel-image entries to zero should not
exceed the size of level2_kernel_pgt.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
| -rw-r--r-- | arch/x86/xen/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 478a2de543a5..2693b7ed5a6f 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1113,7 +1113,7 @@ static void __init xen_cleanhighmap(unsigned long vaddr, /* NOTE: The loop is more greedy than the cleanup_highmap variant. * We include the PMD passed in on _both_ boundaries. */ - for (; vaddr <= vaddr_end && (pmd < (level2_kernel_pgt + PAGE_SIZE)); + for (; vaddr <= vaddr_end && (pmd < (level2_kernel_pgt + PTRS_PER_PMD)); pmd++, vaddr += PMD_SIZE) { if (pmd_none(*pmd)) continue; |