Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
On 08/04/17 at 05:59pm, Chao Fan wrote: > On Fri, Aug 04, 2017 at 05:22:41PM +0800, Baoquan He wrote: > >On 08/04/17 at 03:52pm, Baoquan He wrote: > >> Sorry, NACK this series, there's error to hang system. Before I just > >> halt system intentionally with error() to check the efi memmap printing, > >> didn't notice this. Checking the cause. > > > >I rebuilt the code or change the one of the replacement back, hang never > >seen again. Not sure if I copied the wrong kernel or any other mistakes. > >Have got a hardware system with efi enabled to try again, see if > >anything wrong will happen. It's really weird. And Chao also is helping > >to try on his side. > > Hi Bao, > > After testing for 10 times, no problem happened. > Maybe you did something wrong in the first time. Thanks, Chao. I tried several times on a machine with efi enabled, no problem found. Sorry, guys, so it's a false alarm. > > > >> > >> On 08/04/17 at 03:26pm, Baoquan He wrote: > >> > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the > >> > open code which gets the start of efi memmap descriptor and also > >> > explain why it need be done like that, Ingo suggested it. > >> > > >> > And also replace several places of the open code with efi_memdesc_ptr > >> > helper. > >> > > >> > And also use efi_memdesc_ptr in process_efi_entries() which handle efi > >> > mirror issue during KASLR. > >> > > >> > > >> > Change: > >> > v7->v8: > >> > Add efi_memdesc_ptr helper to wrap the open code which gets the > >> > start of map descriptor according to Ingo's suggestion. > >> > > >> > v6->v7: > >> > Ingo pointed out several incorrect line break issues and unclear > >> > description of patch log. Correct them and rewrite patch log. > >> > > >> > And also rewrite the EFI warning message that if EFI memmap is above > >> > 4G in 32bit system since 32bit system can not handle data above 4G at > >> > kernel decompression stage. This is suggested by Ingo too. > >> > > >> > v5->v6: > >> > Code style issue fix according to Kees's comment. > >> > > >> > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has > >> > been put into tip/x86/boot now. > >> > > >> > > >> > > >> > Baoquan He (2): > >> > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor > >> > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions > >> > > >> > arch/x86/boot/compressed/eboot.c | 2 +- > >> > arch/x86/boot/compressed/kaslr.c | 68 > >> > +- > >> > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- > >> > include/linux/efi.h| 19 +++ > >> > 4 files changed, 88 insertions(+), 5 deletions(-) > >> > > >> > -- > >> > 2.5.5 > >> > > > > > > >
Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
On 08/04/17 at 05:59pm, Chao Fan wrote: > On Fri, Aug 04, 2017 at 05:22:41PM +0800, Baoquan He wrote: > >On 08/04/17 at 03:52pm, Baoquan He wrote: > >> Sorry, NACK this series, there's error to hang system. Before I just > >> halt system intentionally with error() to check the efi memmap printing, > >> didn't notice this. Checking the cause. > > > >I rebuilt the code or change the one of the replacement back, hang never > >seen again. Not sure if I copied the wrong kernel or any other mistakes. > >Have got a hardware system with efi enabled to try again, see if > >anything wrong will happen. It's really weird. And Chao also is helping > >to try on his side. > > Hi Bao, > > After testing for 10 times, no problem happened. > Maybe you did something wrong in the first time. Thanks, Chao. I tried several times on a machine with efi enabled, no problem found. Sorry, guys, so it's a false alarm. > > > >> > >> On 08/04/17 at 03:26pm, Baoquan He wrote: > >> > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the > >> > open code which gets the start of efi memmap descriptor and also > >> > explain why it need be done like that, Ingo suggested it. > >> > > >> > And also replace several places of the open code with efi_memdesc_ptr > >> > helper. > >> > > >> > And also use efi_memdesc_ptr in process_efi_entries() which handle efi > >> > mirror issue during KASLR. > >> > > >> > > >> > Change: > >> > v7->v8: > >> > Add efi_memdesc_ptr helper to wrap the open code which gets the > >> > start of map descriptor according to Ingo's suggestion. > >> > > >> > v6->v7: > >> > Ingo pointed out several incorrect line break issues and unclear > >> > description of patch log. Correct them and rewrite patch log. > >> > > >> > And also rewrite the EFI warning message that if EFI memmap is above > >> > 4G in 32bit system since 32bit system can not handle data above 4G at > >> > kernel decompression stage. This is suggested by Ingo too. > >> > > >> > v5->v6: > >> > Code style issue fix according to Kees's comment. > >> > > >> > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has > >> > been put into tip/x86/boot now. > >> > > >> > > >> > > >> > Baoquan He (2): > >> > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor > >> > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions > >> > > >> > arch/x86/boot/compressed/eboot.c | 2 +- > >> > arch/x86/boot/compressed/kaslr.c | 68 > >> > +- > >> > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- > >> > include/linux/efi.h| 19 +++ > >> > 4 files changed, 88 insertions(+), 5 deletions(-) > >> > > >> > -- > >> > 2.5.5 > >> > > > > > > >
Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
On Fri, Aug 04, 2017 at 05:22:41PM +0800, Baoquan He wrote: >On 08/04/17 at 03:52pm, Baoquan He wrote: >> Sorry, NACK this series, there's error to hang system. Before I just >> halt system intentionally with error() to check the efi memmap printing, >> didn't notice this. Checking the cause. > >I rebuilt the code or change the one of the replacement back, hang never >seen again. Not sure if I copied the wrong kernel or any other mistakes. >Have got a hardware system with efi enabled to try again, see if >anything wrong will happen. It's really weird. And Chao also is helping >to try on his side. Hi Bao, After testing for 10 times, no problem happened. Maybe you did something wrong in the first time. Thanks, Chao Fan > >> >> On 08/04/17 at 03:26pm, Baoquan He wrote: >> > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the >> > open code which gets the start of efi memmap descriptor and also >> > explain why it need be done like that, Ingo suggested it. >> > >> > And also replace several places of the open code with efi_memdesc_ptr >> > helper. >> > >> > And also use efi_memdesc_ptr in process_efi_entries() which handle efi >> > mirror issue during KASLR. >> > >> > >> > Change: >> > v7->v8: >> > Add efi_memdesc_ptr helper to wrap the open code which gets the >> > start of map descriptor according to Ingo's suggestion. >> > >> > v6->v7: >> > Ingo pointed out several incorrect line break issues and unclear >> > description of patch log. Correct them and rewrite patch log. >> > >> > And also rewrite the EFI warning message that if EFI memmap is above >> > 4G in 32bit system since 32bit system can not handle data above 4G at >> > kernel decompression stage. This is suggested by Ingo too. >> > >> > v5->v6: >> > Code style issue fix according to Kees's comment. >> > >> > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has >> > been put into tip/x86/boot now. >> > >> > >> > >> > Baoquan He (2): >> > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor >> > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions >> > >> > arch/x86/boot/compressed/eboot.c | 2 +- >> > arch/x86/boot/compressed/kaslr.c | 68 >> > +- >> > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- >> > include/linux/efi.h| 19 +++ >> > 4 files changed, 88 insertions(+), 5 deletions(-) >> > >> > -- >> > 2.5.5 >> > > >
Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
On Fri, Aug 04, 2017 at 05:22:41PM +0800, Baoquan He wrote: >On 08/04/17 at 03:52pm, Baoquan He wrote: >> Sorry, NACK this series, there's error to hang system. Before I just >> halt system intentionally with error() to check the efi memmap printing, >> didn't notice this. Checking the cause. > >I rebuilt the code or change the one of the replacement back, hang never >seen again. Not sure if I copied the wrong kernel or any other mistakes. >Have got a hardware system with efi enabled to try again, see if >anything wrong will happen. It's really weird. And Chao also is helping >to try on his side. Hi Bao, After testing for 10 times, no problem happened. Maybe you did something wrong in the first time. Thanks, Chao Fan > >> >> On 08/04/17 at 03:26pm, Baoquan He wrote: >> > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the >> > open code which gets the start of efi memmap descriptor and also >> > explain why it need be done like that, Ingo suggested it. >> > >> > And also replace several places of the open code with efi_memdesc_ptr >> > helper. >> > >> > And also use efi_memdesc_ptr in process_efi_entries() which handle efi >> > mirror issue during KASLR. >> > >> > >> > Change: >> > v7->v8: >> > Add efi_memdesc_ptr helper to wrap the open code which gets the >> > start of map descriptor according to Ingo's suggestion. >> > >> > v6->v7: >> > Ingo pointed out several incorrect line break issues and unclear >> > description of patch log. Correct them and rewrite patch log. >> > >> > And also rewrite the EFI warning message that if EFI memmap is above >> > 4G in 32bit system since 32bit system can not handle data above 4G at >> > kernel decompression stage. This is suggested by Ingo too. >> > >> > v5->v6: >> > Code style issue fix according to Kees's comment. >> > >> > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has >> > been put into tip/x86/boot now. >> > >> > >> > >> > Baoquan He (2): >> > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor >> > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions >> > >> > arch/x86/boot/compressed/eboot.c | 2 +- >> > arch/x86/boot/compressed/kaslr.c | 68 >> > +- >> > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- >> > include/linux/efi.h| 19 +++ >> > 4 files changed, 88 insertions(+), 5 deletions(-) >> > >> > -- >> > 2.5.5 >> > > >
Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
On Fri, Aug 04, 2017 at 05:22:41PM +0800, Baoquan He wrote: >On 08/04/17 at 03:52pm, Baoquan He wrote: >> Sorry, NACK this series, there's error to hang system. Before I just >> halt system intentionally with error() to check the efi memmap printing, >> didn't notice this. Checking the cause. > >I rebuilt the code or change the one of the replacement back, hang never >seen again. Not sure if I copied the wrong kernel or any other mistakes. >Have got a hardware system with efi enabled to try again, see if >anything wrong will happen. It's really weird. And Chao also is helping Maybe a little later, cause from tommorow, I will be on vacation for 9 days. Thanks, Chao Fan >to try on his side. > >> >> On 08/04/17 at 03:26pm, Baoquan He wrote: >> > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the >> > open code which gets the start of efi memmap descriptor and also >> > explain why it need be done like that, Ingo suggested it. >> > >> > And also replace several places of the open code with efi_memdesc_ptr >> > helper. >> > >> > And also use efi_memdesc_ptr in process_efi_entries() which handle efi >> > mirror issue during KASLR. >> > >> > >> > Change: >> > v7->v8: >> > Add efi_memdesc_ptr helper to wrap the open code which gets the >> > start of map descriptor according to Ingo's suggestion. >> > >> > v6->v7: >> > Ingo pointed out several incorrect line break issues and unclear >> > description of patch log. Correct them and rewrite patch log. >> > >> > And also rewrite the EFI warning message that if EFI memmap is above >> > 4G in 32bit system since 32bit system can not handle data above 4G at >> > kernel decompression stage. This is suggested by Ingo too. >> > >> > v5->v6: >> > Code style issue fix according to Kees's comment. >> > >> > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has >> > been put into tip/x86/boot now. >> > >> > >> > >> > Baoquan He (2): >> > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor >> > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions >> > >> > arch/x86/boot/compressed/eboot.c | 2 +- >> > arch/x86/boot/compressed/kaslr.c | 68 >> > +- >> > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- >> > include/linux/efi.h| 19 +++ >> > 4 files changed, 88 insertions(+), 5 deletions(-) >> > >> > -- >> > 2.5.5 >> > > >
Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
On Fri, Aug 04, 2017 at 05:22:41PM +0800, Baoquan He wrote: >On 08/04/17 at 03:52pm, Baoquan He wrote: >> Sorry, NACK this series, there's error to hang system. Before I just >> halt system intentionally with error() to check the efi memmap printing, >> didn't notice this. Checking the cause. > >I rebuilt the code or change the one of the replacement back, hang never >seen again. Not sure if I copied the wrong kernel or any other mistakes. >Have got a hardware system with efi enabled to try again, see if >anything wrong will happen. It's really weird. And Chao also is helping Maybe a little later, cause from tommorow, I will be on vacation for 9 days. Thanks, Chao Fan >to try on his side. > >> >> On 08/04/17 at 03:26pm, Baoquan He wrote: >> > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the >> > open code which gets the start of efi memmap descriptor and also >> > explain why it need be done like that, Ingo suggested it. >> > >> > And also replace several places of the open code with efi_memdesc_ptr >> > helper. >> > >> > And also use efi_memdesc_ptr in process_efi_entries() which handle efi >> > mirror issue during KASLR. >> > >> > >> > Change: >> > v7->v8: >> > Add efi_memdesc_ptr helper to wrap the open code which gets the >> > start of map descriptor according to Ingo's suggestion. >> > >> > v6->v7: >> > Ingo pointed out several incorrect line break issues and unclear >> > description of patch log. Correct them and rewrite patch log. >> > >> > And also rewrite the EFI warning message that if EFI memmap is above >> > 4G in 32bit system since 32bit system can not handle data above 4G at >> > kernel decompression stage. This is suggested by Ingo too. >> > >> > v5->v6: >> > Code style issue fix according to Kees's comment. >> > >> > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has >> > been put into tip/x86/boot now. >> > >> > >> > >> > Baoquan He (2): >> > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor >> > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions >> > >> > arch/x86/boot/compressed/eboot.c | 2 +- >> > arch/x86/boot/compressed/kaslr.c | 68 >> > +- >> > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- >> > include/linux/efi.h| 19 +++ >> > 4 files changed, 88 insertions(+), 5 deletions(-) >> > >> > -- >> > 2.5.5 >> > > >
Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
On 08/04/17 at 03:52pm, Baoquan He wrote: > Sorry, NACK this series, there's error to hang system. Before I just > halt system intentionally with error() to check the efi memmap printing, > didn't notice this. Checking the cause. I rebuilt the code or change the one of the replacement back, hang never seen again. Not sure if I copied the wrong kernel or any other mistakes. Have got a hardware system with efi enabled to try again, see if anything wrong will happen. It's really weird. And Chao also is helping to try on his side. > > On 08/04/17 at 03:26pm, Baoquan He wrote: > > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the > > open code which gets the start of efi memmap descriptor and also > > explain why it need be done like that, Ingo suggested it. > > > > And also replace several places of the open code with efi_memdesc_ptr > > helper. > > > > And also use efi_memdesc_ptr in process_efi_entries() which handle efi > > mirror issue during KASLR. > > > > > > Change: > > v7->v8: > > Add efi_memdesc_ptr helper to wrap the open code which gets the > > start of map descriptor according to Ingo's suggestion. > > > > v6->v7: > > Ingo pointed out several incorrect line break issues and unclear > > description of patch log. Correct them and rewrite patch log. > > > > And also rewrite the EFI warning message that if EFI memmap is above > > 4G in 32bit system since 32bit system can not handle data above 4G at > > kernel decompression stage. This is suggested by Ingo too. > > > > v5->v6: > > Code style issue fix according to Kees's comment. > > > > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has > > been put into tip/x86/boot now. > > > > > > > > Baoquan He (2): > > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor > > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions > > > > arch/x86/boot/compressed/eboot.c | 2 +- > > arch/x86/boot/compressed/kaslr.c | 68 > > +- > > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- > > include/linux/efi.h| 19 +++ > > 4 files changed, 88 insertions(+), 5 deletions(-) > > > > -- > > 2.5.5 > >
Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
On 08/04/17 at 03:52pm, Baoquan He wrote: > Sorry, NACK this series, there's error to hang system. Before I just > halt system intentionally with error() to check the efi memmap printing, > didn't notice this. Checking the cause. I rebuilt the code or change the one of the replacement back, hang never seen again. Not sure if I copied the wrong kernel or any other mistakes. Have got a hardware system with efi enabled to try again, see if anything wrong will happen. It's really weird. And Chao also is helping to try on his side. > > On 08/04/17 at 03:26pm, Baoquan He wrote: > > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the > > open code which gets the start of efi memmap descriptor and also > > explain why it need be done like that, Ingo suggested it. > > > > And also replace several places of the open code with efi_memdesc_ptr > > helper. > > > > And also use efi_memdesc_ptr in process_efi_entries() which handle efi > > mirror issue during KASLR. > > > > > > Change: > > v7->v8: > > Add efi_memdesc_ptr helper to wrap the open code which gets the > > start of map descriptor according to Ingo's suggestion. > > > > v6->v7: > > Ingo pointed out several incorrect line break issues and unclear > > description of patch log. Correct them and rewrite patch log. > > > > And also rewrite the EFI warning message that if EFI memmap is above > > 4G in 32bit system since 32bit system can not handle data above 4G at > > kernel decompression stage. This is suggested by Ingo too. > > > > v5->v6: > > Code style issue fix according to Kees's comment. > > > > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has > > been put into tip/x86/boot now. > > > > > > > > Baoquan He (2): > > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor > > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions > > > > arch/x86/boot/compressed/eboot.c | 2 +- > > arch/x86/boot/compressed/kaslr.c | 68 > > +- > > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- > > include/linux/efi.h| 19 +++ > > 4 files changed, 88 insertions(+), 5 deletions(-) > > > > -- > > 2.5.5 > >
Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
Sorry, NACK this series, there's error to hang system. Before I just halt system intentionally with error() to check the efi memmap printing, didn't notice this. Checking the cause. On 08/04/17 at 03:26pm, Baoquan He wrote: > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the > open code which gets the start of efi memmap descriptor and also > explain why it need be done like that, Ingo suggested it. > > And also replace several places of the open code with efi_memdesc_ptr > helper. > > And also use efi_memdesc_ptr in process_efi_entries() which handle efi > mirror issue during KASLR. > > > Change: > v7->v8: > Add efi_memdesc_ptr helper to wrap the open code which gets the > start of map descriptor according to Ingo's suggestion. > > v6->v7: > Ingo pointed out several incorrect line break issues and unclear > description of patch log. Correct them and rewrite patch log. > > And also rewrite the EFI warning message that if EFI memmap is above > 4G in 32bit system since 32bit system can not handle data above 4G at > kernel decompression stage. This is suggested by Ingo too. > > v5->v6: > Code style issue fix according to Kees's comment. > > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has > been put into tip/x86/boot now. > > > > Baoquan He (2): > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions > > arch/x86/boot/compressed/eboot.c | 2 +- > arch/x86/boot/compressed/kaslr.c | 68 > +- > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- > include/linux/efi.h| 19 +++ > 4 files changed, 88 insertions(+), 5 deletions(-) > > -- > 2.5.5 >
Re: [PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
Sorry, NACK this series, there's error to hang system. Before I just halt system intentionally with error() to check the efi memmap printing, didn't notice this. Checking the cause. On 08/04/17 at 03:26pm, Baoquan He wrote: > Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the > open code which gets the start of efi memmap descriptor and also > explain why it need be done like that, Ingo suggested it. > > And also replace several places of the open code with efi_memdesc_ptr > helper. > > And also use efi_memdesc_ptr in process_efi_entries() which handle efi > mirror issue during KASLR. > > > Change: > v7->v8: > Add efi_memdesc_ptr helper to wrap the open code which gets the > start of map descriptor according to Ingo's suggestion. > > v6->v7: > Ingo pointed out several incorrect line break issues and unclear > description of patch log. Correct them and rewrite patch log. > > And also rewrite the EFI warning message that if EFI memmap is above > 4G in 32bit system since 32bit system can not handle data above 4G at > kernel decompression stage. This is suggested by Ingo too. > > v5->v6: > Code style issue fix according to Kees's comment. > > This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has > been put into tip/x86/boot now. > > > > Baoquan He (2): > efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor > x86/boot/KASLR: Restrict kernel to be randomized in mirror regions > > arch/x86/boot/compressed/eboot.c | 2 +- > arch/x86/boot/compressed/kaslr.c | 68 > +- > drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- > include/linux/efi.h| 19 +++ > 4 files changed, 88 insertions(+), 5 deletions(-) > > -- > 2.5.5 >
[PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the open code which gets the start of efi memmap descriptor and also explain why it need be done like that, Ingo suggested it. And also replace several places of the open code with efi_memdesc_ptr helper. And also use efi_memdesc_ptr in process_efi_entries() which handle efi mirror issue during KASLR. Change: v7->v8: Add efi_memdesc_ptr helper to wrap the open code which gets the start of map descriptor according to Ingo's suggestion. v6->v7: Ingo pointed out several incorrect line break issues and unclear description of patch log. Correct them and rewrite patch log. And also rewrite the EFI warning message that if EFI memmap is above 4G in 32bit system since 32bit system can not handle data above 4G at kernel decompression stage. This is suggested by Ingo too. v5->v6: Code style issue fix according to Kees's comment. This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has been put into tip/x86/boot now. Baoquan He (2): efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor x86/boot/KASLR: Restrict kernel to be randomized in mirror regions arch/x86/boot/compressed/eboot.c | 2 +- arch/x86/boot/compressed/kaslr.c | 68 +- drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- include/linux/efi.h| 19 +++ 4 files changed, 88 insertions(+), 5 deletions(-) -- 2.5.5
[PATCH v8 0/2] x86/boot/KASLR: Restrict kernel to be randomized in mirror regions
Patch 1/2 is newly added to add efi_memdesc_ptr helper to wrap the open code which gets the start of efi memmap descriptor and also explain why it need be done like that, Ingo suggested it. And also replace several places of the open code with efi_memdesc_ptr helper. And also use efi_memdesc_ptr in process_efi_entries() which handle efi mirror issue during KASLR. Change: v7->v8: Add efi_memdesc_ptr helper to wrap the open code which gets the start of map descriptor according to Ingo's suggestion. v6->v7: Ingo pointed out several incorrect line break issues and unclear description of patch log. Correct them and rewrite patch log. And also rewrite the EFI warning message that if EFI memmap is above 4G in 32bit system since 32bit system can not handle data above 4G at kernel decompression stage. This is suggested by Ingo too. v5->v6: Code style issue fix according to Kees's comment. This is based on tip/x86/boot, patch 1,2,3/4 in v5 post has been put into tip/x86/boot now. Baoquan He (2): efi: Introduce efi_memdesc_ptr to get pointer to memmap descriptor x86/boot/KASLR: Restrict kernel to be randomized in mirror regions arch/x86/boot/compressed/eboot.c | 2 +- arch/x86/boot/compressed/kaslr.c | 68 +- drivers/firmware/efi/libstub/efi-stub-helper.c | 4 +- include/linux/efi.h| 19 +++ 4 files changed, 88 insertions(+), 5 deletions(-) -- 2.5.5
