Date: Tue, 5 Dec 2017 15:54:06 -0800 From: Laura Abbott <labbott@...hat.com> To: Jinbum Park <jinb.park7@...il.com>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com Cc: afzal.mohd.ma@...il.com, mark.rutland@....com, linux@...linux.org.uk, gregkh@...uxfoundation.org, keescook@...omium.org, vladimir.murzin@....com, arnd@...db.de Subject: Re: [PATCH v3 0/3] arm: Makes ptdump resuable and add WX page checking On 12/04/2017 06:24 AM, Jinbum Park wrote: > Hi, > > Page table dumping code for arm64-x86 is reusable, > and they have function for WX page checking. > But arm doesn't have that. > > This path series are to makes ptdump reusable, > and add WX page checking for arm. > This is heavily based on arm64 version. > > v2 : > Fix a sender name of mail header, there was an mistake. > (from "jinb.park" to Jinbum Park) > Contents of patch-set are perfectly same. > > v3 : > Take advantage of the existing pg_level and bits arrays > to check ro, nx prot. > > jinb.park (3): > arm: mm: dump: make page table dumping reusable > arm: mm: dump: make the page table dumping seq_file optional > arm: mm: dump: add checking for writable and executable pages > > arch/arm/Kconfig.debug | 33 +++++++++- > arch/arm/include/asm/ptdump.h | 56 ++++++++++++++++ > arch/arm/mm/Makefile | 3 +- > arch/arm/mm/dump.c | 144 +++++++++++++++++++++++++++++------------- > arch/arm/mm/init.c | 2 + > arch/arm/mm/ptdump_debugfs.c | 34 ++++++++++ > 6 files changed, 226 insertions(+), 46 deletions(-) > create mode 100644 arch/arm/include/asm/ptdump.h > create mode 100644 arch/arm/mm/ptdump_debugfs.c > This detects the issue fixed by 400eeffaffc7 ("ARM: 8722/1: mm: make STRICT_KERNEL_RWX effective for LPAE"). I'll give it another test after the next version. Thanks, Laura
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