diff options
| author | Juergen Gross <jgross@suse.com> | 2016-06-23 07:12:27 +0200 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:57:46 +0200 |
| commit | e6de0f552a2a4a967fa473d70042ffee375816bb (patch) | |
| tree | f828b2cc1aad6ab1224ea3610b9df009f5f0cbe9 /arch | |
| parent | 78861ba88891622456cba3fa5cc4ff85743ba407 (diff) | |
x86/xen: fix upper bound of pmd loop in xen_cleanhighmap()
commit 1cf38741308c64d08553602b3374fb39224eeb5a upstream.
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>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'arch')
| -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 fdc3ba28c..53b061c9a 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1187,7 +1187,7 @@ 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; |