Date: Tue, 12 Sep 2017 07:51:06 +0100 From: Ard Biesheuvel <ard.biesheuvel@...aro.org> To: Tony Lindgren <tony@...mide.com> Cc: "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, Kernel Hardening <kernel-hardening@...ts.openwall.com>, Arnd Bergmann <arnd@...db.de>, Nicolas Pitre <nico@...aro.org>, Russell King <linux@...linux.org.uk>, Kees Cook <keescook@...omium.org>, Thomas Garnier <thgarnie@...gle.com>, Marc Zyngier <marc.zyngier@....com>, Mark Rutland <mark.rutland@....com>, Matt Fleming <matt@...eblueprint.co.uk>, Dave Martin <dave.martin@....com> Subject: Re: [PATCH v2 00/29] implement KASLR for ARM On 6 September 2017 at 21:08, Tony Lindgren <tony@...mide.com> wrote: > * Ard Biesheuvel <ard.biesheuvel@...aro.org> [170906 11:25]: >> Did you capture the image_size and pa_start/pa_end as well? > > Sorry I guess that was an incomplete copy & paste, but here's > another one: > > regions.image_size:00e08000 > regions.pa_start:80000000 > regions.pa_end:871f8000 > regions.zimage_start:81000000 > regions.zimage_size:004379e8 > regions.dtb_start:86feb000 > regions.dtb_size:00012000 > regions.initrd_start:00000000 > regions.initrd_size:00000000 > count:00000028 > num:00000025 > *kaslr_offset:05e00000 > Uncompressing Linux... done, booting the kernel. > Warning: Neither atags nor dtb found > >> In any case, this is the exact same offset that failed before, so the >> rounding of pa_start wasn't the problem. > > OK > I am pretty sure this is an issue with .bss, which is not covered by image_size (and which is absolutely *huge* btw [8+ MB] on omap2plus_defconfig, due to lockdep being enabled by default)
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