From: Christophe Leroy <christophe.leroy@c-s.fr> To: Jason Yan <yanaijie@huawei.com>, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, diana.craciun@nxp.com, benh@kernel.crashing.org, paulus@samba.org, npiggin@gmail.com, keescook@chromium.org, kernel-hardening@lists.openwall.com Cc: linux-kernel@vger.kernel.org, wangkefeng.wang@huawei.com, yebin10@huawei.com, thunder.leizhen@huawei.com, jingxiangfeng@huawei.com, fanchengyang@huawei.com Subject: Re: [RFC PATCH 03/10] powerpc: introduce kimage_vaddr to store the kernel base Date: Mon, 29 Jul 2019 13:00:28 +0200 Message-ID: <7e19ade3-cb1a-a633-aa2d-ef5f182ba80c@c-s.fr> (raw) In-Reply-To: <20190717080621.40424-4-yanaijie@huawei.com> Le 17/07/2019 à 10:06, Jason Yan a écrit : > Now the kernel base is a fixed value - KERNELBASE. To support KASLR, we > need a variable to store the kernel base. > > Signed-off-by: Jason Yan <yanaijie@huawei.com> > Cc: Diana Craciun <diana.craciun@nxp.com> > Cc: Michael Ellerman <mpe@ellerman.id.au> > Cc: Christophe Leroy <christophe.leroy@c-s.fr> > Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> > Cc: Paul Mackerras <paulus@samba.org> > Cc: Nicholas Piggin <npiggin@gmail.com> > Cc: Kees Cook <keescook@chromium.org> Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr> > --- > arch/powerpc/include/asm/page.h | 2 ++ > arch/powerpc/mm/init-common.c | 2 ++ > 2 files changed, 4 insertions(+) > > diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h > index 0d52f57fca04..60a68d3a54b1 100644 > --- a/arch/powerpc/include/asm/page.h > +++ b/arch/powerpc/include/asm/page.h > @@ -315,6 +315,8 @@ void arch_free_page(struct page *page, int order); > > struct vm_area_struct; > > +extern unsigned long kimage_vaddr; > + > #include <asm-generic/memory_model.h> > #endif /* __ASSEMBLY__ */ > #include <asm/slice.h> > diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c > index 9273c38009cb..c7a98c73e5c1 100644 > --- a/arch/powerpc/mm/init-common.c > +++ b/arch/powerpc/mm/init-common.c > @@ -25,6 +25,8 @@ phys_addr_t memstart_addr = (phys_addr_t)~0ull; > EXPORT_SYMBOL(memstart_addr); > phys_addr_t kernstart_addr; > EXPORT_SYMBOL(kernstart_addr); > +unsigned long kimage_vaddr = KERNELBASE; > +EXPORT_SYMBOL(kimage_vaddr); > > static bool disable_kuep = !IS_ENABLED(CONFIG_PPC_KUEP); > static bool disable_kuap = !IS_ENABLED(CONFIG_PPC_KUAP); >
next prev parent reply index Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-17 8:06 [RFC PATCH 00/10] implement KASLR for powerpc/fsl_booke/32 Jason Yan 2019-07-17 8:06 ` [RFC PATCH 01/10] powerpc: unify definition of M_IF_NEEDED Jason Yan 2019-07-29 10:59 ` Christophe Leroy 2019-07-17 8:06 ` [RFC PATCH 02/10] powerpc: move memstart_addr and kernstart_addr to init-common.c Jason Yan 2019-07-29 11:00 ` Christophe Leroy 2019-07-29 14:31 ` Christoph Hellwig 2019-07-30 0:47 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 03/10] powerpc: introduce kimage_vaddr to store the kernel base Jason Yan 2019-07-29 11:00 ` Christophe Leroy [this message] 2019-07-29 14:32 ` Christoph Hellwig 2019-07-17 8:06 ` [RFC PATCH 04/10] powerpc/fsl_booke/32: introduce create_tlb_entry() helper Jason Yan 2019-07-29 11:05 ` Christophe Leroy 2019-07-29 13:26 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 05/10] powerpc/fsl_booke/32: introduce reloc_kernel_entry() helper Jason Yan 2019-07-29 11:08 ` Christophe Leroy 2019-07-29 13:35 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 06/10] powerpc/fsl_booke/32: implement KASLR infrastructure Jason Yan 2019-07-29 11:16 ` Christophe Leroy 2019-07-17 8:06 ` [RFC PATCH 07/10] powerpc/fsl_booke/32: randomize the kernel image offset Jason Yan 2019-07-29 11:33 ` Christophe Leroy 2019-07-29 13:53 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 08/10] powerpc/fsl_booke/kaslr: clear the original kernel if randomized Jason Yan 2019-07-29 11:19 ` Christophe Leroy 2019-07-29 13:43 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 09/10] powerpc/fsl_booke/kaslr: support nokaslr cmdline parameter Jason Yan 2019-07-29 11:38 ` Christophe Leroy 2019-07-29 14:04 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 10/10] powerpc/fsl_booke/kaslr: dump out kernel offset information on panic Jason Yan 2019-07-29 11:43 ` Christophe Leroy 2019-07-29 14:08 ` Jason Yan 2019-07-25 7:16 ` [RFC PATCH 00/10] implement KASLR for powerpc/fsl_booke/32 Jason Yan 2019-07-25 19:58 ` Kees Cook 2019-07-26 7:20 ` Jason Yan 2019-07-26 16:15 ` Kees Cook 2019-07-26 7:04 ` Diana Madalina Craciun 2019-07-26 7:26 ` Jason Yan 2019-07-29 14:30 ` Diana Madalina Craciun
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=7e19ade3-cb1a-a633-aa2d-ef5f182ba80c@c-s.fr \ --to=christophe.leroy@c-s.fr \ --cc=benh@kernel.crashing.org \ --cc=diana.craciun@nxp.com \ --cc=fanchengyang@huawei.com \ --cc=jingxiangfeng@huawei.com \ --cc=keescook@chromium.org \ --cc=kernel-hardening@lists.openwall.com \ --cc=linux-kernel@vger.kernel.org \ --cc=linuxppc-dev@lists.ozlabs.org \ --cc=mpe@ellerman.id.au \ --cc=npiggin@gmail.com \ --cc=paulus@samba.org \ --cc=thunder.leizhen@huawei.com \ --cc=wangkefeng.wang@huawei.com \ --cc=yanaijie@huawei.com \ --cc=yebin10@huawei.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
Kernel-hardening Archive on lore.kernel.org Archives are clonable: git clone --mirror https://lore.kernel.org/kernel-hardening/0 kernel-hardening/git/0.git # If you have public-inbox 1.1+ installed, you may # initialize and index your mirror using the following commands: public-inbox-init -V2 kernel-hardening kernel-hardening/ https://lore.kernel.org/kernel-hardening \ kernel-hardening@lists.openwall.com public-inbox-index kernel-hardening Example config snippet for mirrors Newsgroup available over NNTP: nntp://nntp.lore.kernel.org/com.openwall.lists.kernel-hardening AGPL code for this site: git clone https://public-inbox.org/public-inbox.git