Re: KASLR kernel fails to boot
No problem, thanks! Works now. On Sat, 23 May 2020 at 09:32, Maxime Villard wrote: > > Sorry about this, there was a file I forgot in my commit command line for a > change two weeks ago: > > https://mail-index.netbsd.org/source-changes/2020/05/23/msg117587.html > > The lack of call to elf_build_info() caused a sanity check in the prekern to > fail. > > Thanks for reporting > > > Le 22/05/2020 à 12:42, Chavdar Ivanov a écrit : > > After the latest updates to /usr/mdec/prekern, now I am getting > > > > FATAL > > elf sym lookup: symbol beyond table > > > > > > when I try to load the KASLR kernel. > > > > Chavdar > > > > On Tue, 5 May 2020 at 21:26, Chavdar Ivanov wrote: > >> > >> Ok, thanks. > >> > >> On Tue, 5 May 2020 at 20:21, Maxime Villard wrote: > >>> > >>> Le 05/05/2020 à 21:01, Chavdar Ivanov a écrit : > On Mon, 4 May 2020 at 21:21, Chavdar Ivanov wrote: > > > > Hi, > > > > netbsd-GENERIC_KASLR from yesterday fails to pass the prekern stage > > with a frightening message in red 'Page fault'. I've never seen this > > before, no idea if I can get any further info. > > > > This machine has been otherwise running KASLR kernel for some four > > months now without a problem; it is a VirtualBox guest. > > Same with just completed clean buid of 9.99.60. > > After "[+] Rel relocations applied" I get: > > ** Fault occurred ** > page fault > ** > > I switched th vm to the normal kernel, no problem otherwise. > >>> > >>> I know, this is because of the Xen section in the binary, which is not > >>> marked as allocatable. The prekern explicitly decides not to map the note > >>> but then proceeds to relocate its RELAs regardless, which causes a fatal > >>> page fault. > >>> > >>> Trivial to fix but I'm not sure which policy to choose, may take a few > >>> days. > >> > >> > >> > >> -- > >> > > > > > > --
Re: KASLR kernel fails to boot
Sorry about this, there was a file I forgot in my commit command line for a change two weeks ago: https://mail-index.netbsd.org/source-changes/2020/05/23/msg117587.html The lack of call to elf_build_info() caused a sanity check in the prekern to fail. Thanks for reporting Le 22/05/2020 à 12:42, Chavdar Ivanov a écrit : After the latest updates to /usr/mdec/prekern, now I am getting FATAL elf sym lookup: symbol beyond table when I try to load the KASLR kernel. Chavdar On Tue, 5 May 2020 at 21:26, Chavdar Ivanov wrote: Ok, thanks. On Tue, 5 May 2020 at 20:21, Maxime Villard wrote: Le 05/05/2020 à 21:01, Chavdar Ivanov a écrit : On Mon, 4 May 2020 at 21:21, Chavdar Ivanov wrote: Hi, netbsd-GENERIC_KASLR from yesterday fails to pass the prekern stage with a frightening message in red 'Page fault'. I've never seen this before, no idea if I can get any further info. This machine has been otherwise running KASLR kernel for some four months now without a problem; it is a VirtualBox guest. Same with just completed clean buid of 9.99.60. After "[+] Rel relocations applied" I get: ** Fault occurred ** page fault ** I switched th vm to the normal kernel, no problem otherwise. I know, this is because of the Xen section in the binary, which is not marked as allocatable. The prekern explicitly decides not to map the note but then proceeds to relocate its RELAs regardless, which causes a fatal page fault. Trivial to fix but I'm not sure which policy to choose, may take a few days. --
Re: KASLR kernel fails to boot
After the latest updates to /usr/mdec/prekern, now I am getting FATAL elf sym lookup: symbol beyond table when I try to load the KASLR kernel. Chavdar On Tue, 5 May 2020 at 21:26, Chavdar Ivanov wrote: > > Ok, thanks. > > On Tue, 5 May 2020 at 20:21, Maxime Villard wrote: > > > > Le 05/05/2020 à 21:01, Chavdar Ivanov a écrit : > > > On Mon, 4 May 2020 at 21:21, Chavdar Ivanov wrote: > > >> > > >> Hi, > > >> > > >> netbsd-GENERIC_KASLR from yesterday fails to pass the prekern stage > > >> with a frightening message in red 'Page fault'. I've never seen this > > >> before, no idea if I can get any further info. > > >> > > >> This machine has been otherwise running KASLR kernel for some four > > >> months now without a problem; it is a VirtualBox guest. > > > > > > Same with just completed clean buid of 9.99.60. > > > > > > After "[+] Rel relocations applied" I get: > > > > > > ** Fault occurred ** > > > page fault > > > ** > > > > > > I switched th vm to the normal kernel, no problem otherwise. > > > > I know, this is because of the Xen section in the binary, which is not > > marked as allocatable. The prekern explicitly decides not to map the note > > but then proceeds to relocate its RELAs regardless, which causes a fatal > > page fault. > > > > Trivial to fix but I'm not sure which policy to choose, may take a few > > days. > > > > -- > --
Re: KASLR kernel fails to boot
Ok, thanks. On Tue, 5 May 2020 at 20:21, Maxime Villard wrote: > > Le 05/05/2020 à 21:01, Chavdar Ivanov a écrit : > > On Mon, 4 May 2020 at 21:21, Chavdar Ivanov wrote: > >> > >> Hi, > >> > >> netbsd-GENERIC_KASLR from yesterday fails to pass the prekern stage > >> with a frightening message in red 'Page fault'. I've never seen this > >> before, no idea if I can get any further info. > >> > >> This machine has been otherwise running KASLR kernel for some four > >> months now without a problem; it is a VirtualBox guest. > > > > Same with just completed clean buid of 9.99.60. > > > > After "[+] Rel relocations applied" I get: > > > > ** Fault occurred ** > > page fault > > ** > > > > I switched th vm to the normal kernel, no problem otherwise. > > I know, this is because of the Xen section in the binary, which is not > marked as allocatable. The prekern explicitly decides not to map the note > but then proceeds to relocate its RELAs regardless, which causes a fatal > page fault. > > Trivial to fix but I'm not sure which policy to choose, may take a few > days. --
Re: KASLR kernel fails to boot
Le 05/05/2020 à 21:01, Chavdar Ivanov a écrit : On Mon, 4 May 2020 at 21:21, Chavdar Ivanov wrote: Hi, netbsd-GENERIC_KASLR from yesterday fails to pass the prekern stage with a frightening message in red 'Page fault'. I've never seen this before, no idea if I can get any further info. This machine has been otherwise running KASLR kernel for some four months now without a problem; it is a VirtualBox guest. Same with just completed clean buid of 9.99.60. After "[+] Rel relocations applied" I get: ** Fault occurred ** page fault ** I switched th vm to the normal kernel, no problem otherwise. I know, this is because of the Xen section in the binary, which is not marked as allocatable. The prekern explicitly decides not to map the note but then proceeds to relocate its RELAs regardless, which causes a fatal page fault. Trivial to fix but I'm not sure which policy to choose, may take a few days.
Re: KASLR kernel fails to boot
On Mon, 4 May 2020 at 21:21, Chavdar Ivanov wrote: > > Hi, > > netbsd-GENERIC_KASLR from yesterday fails to pass the prekern stage > with a frightening message in red 'Page fault'. I've never seen this > before, no idea if I can get any further info. > > This machine has been otherwise running KASLR kernel for some four > months now without a problem; it is a VirtualBox guest. Same with just completed clean buid of 9.99.60. After "[+] Rel relocations applied" I get: ** Fault occurred ** page fault ** I switched th vm to the normal kernel, no problem otherwise. > > Chavdar > > -- > --
