| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1302607192-21355-1-git-send-email-stefano.stabellini@eu.citrix.com> Date: Tue, 12 Apr 2011 12:19:49 +0100 From: stefano.stabellini@...citrix.com To: linux-kernel@...r.kernel.org Cc: xen-devel@...ts.xensource.com, konrad.wilk@...cle.com, jeremy@...p.org, Stefano.Stabellini@...citrix.com, yinghai@...nel.org, hpa@...ux.intel.com, mingo@...e.hu, Stefano Stabellini <stefano.stabellini@...citrix.com> Subject: [PATCH 1/4] xen: mask_rw_pte mark RO all pagetable pages up to pgt_buf_top From: Stefano Stabellini <stefano.stabellini@...citrix.com> mask_rw_pte is currently checking if a pfn is a pagetable page if it falls in the range pgt_buf_start - pgt_buf_end but that is incorrect because pgt_buf_end is a moving target: pgt_buf_top is the real boundary. Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com> --- 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 c82df6c..6b833db 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1491,7 +1491,7 @@ static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte) * it is RO. */ if (((!is_early_ioremap_ptep(ptep) && - pfn >= pgt_buf_start && pfn < pgt_buf_end)) || + pfn >= pgt_buf_start && pfn < pgt_buf_top)) || (is_early_ioremap_ptep(ptep) && pfn != (pgt_buf_end - 1))) pte = pte_wrprotect(pte); -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists