Re: [Xen-devel] [PATCH] xen: fix upper bound of pmd loop in xen_cleanhighmap()
On 23/06/16 06:12, Juergen Gross wrote: > 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. Applied to for-linus-4.7b, thanks. David
Re: [Xen-devel] [PATCH] xen: fix upper bound of pmd loop in xen_cleanhighmap()
On 23/06/16 06:12, Juergen Gross wrote: > 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. Applied to for-linus-4.7b, thanks. David
[PATCH] 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 TorvaldsSigned-off-by: Juergen Gross --- arch/x86/xen/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 478a2de..2693b7e 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; -- 2.6.6
[PATCH] 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 Signed-off-by: Juergen Gross --- arch/x86/xen/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 478a2de..2693b7e 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; -- 2.6.6