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Date: Thu, 30 Jun 2016 17:24:18 -0700 From: Yinghai Lu <yinghai@...nel.org> To: Ye Xiaolong <xiaolong.ye@...el.com>, Baoquan He <bhe@...hat.com>, Kees Cook <keescook@...omium.org> Cc: "Huang, Ying" <ying.huang@...el.com>, LKP ML <lkp@...org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [LKP] [x86/KASLR] ed9f007ee6: -- System halted On Wed, Jun 29, 2016 at 11:58 PM, Ye Xiaolong <xiaolong.ye@...el.com> wrote: > On Wed, Jun 29, 2016 at 09:49:12PM -0700, Yinghai Lu wrote: >>On Wed, Jun 29, 2016 at 1:29 PM, Huang, Ying <ying.huang@...el.com> wrote: >>> If you could provide a git branch for that, that will be easier for us >>> to test and more accurate for you to get the right patch to be tested. >>> >> >>Please check >> >>git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git >>for-x86-v4.8-kaslr-debug > > Hi, yinghai > > Attached is the dmesg for the kernel which is built based on your > for-x86-v4.8-kaslr-debug branch. Thanks for capturing the boot log. early console in setup code early console in extract_kernel decompress_kernel: input: [0x0008fba276-0x000a8818ed] output: [0x0001000000-0x000a867c97] 0x09867c98: output_len [0x0001000000-0x0009768fff] 0x08769000: run_size [0x0001000000-0x000a867c97] 0x09867c98: output_run_size [0x0001000000-0x000a8affff] 0x098b0000: init_size ZO text/data: [0x000a8818ee-0x000a8affff] ZO heap: [0x000a888400-0x000a8983ff] VO bss/brk: [0x0009674000-0x0009768fff] booted via startup_32() Physical KASLR using RDTSC... Virtual KASLR using RDTSC... new output: [0x0006600000-0x000fe67c97] 0x09867c98: output_run_size virt_addr: 0x0024000000 decompress: [0x0006600000-0x000fe67c97] <=== [0x0008fba276-0x000a8818ed] Decompressing Linux... XZ-compressed data is corrupt -- System halted Hi Kees/Baoquan, Looks like commit ed9f007ee68478f6a50ec9971ade25a0129a5c0e Author: Kees Cook <keescook@...omium.org> Date: Wed May 25 15:45:33 2016 -0700 x86/KASLR: Extend kernel image physical address randomization to addresses l arger than 4G cause choose_random_location() return new output buffer new output: [0x0006600000-0x000fe67c97] 0x09867c98: output_run_size that is overlapped with input data. input: [0x0008fba276-0x000a8818ed] ....-0x000a8affff] 0x098b0000: init_size and input already is in mem_avoid.
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