From: ard.biesheuvel@linaro.org (Ard Biesheuvel) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 0/7] arm64: efi: PE/COFF cleanup/hardening Date: Mon, 6 Feb 2017 16:24:28 +0000 [thread overview] Message-ID: <1486398275-3966-1-git-send-email-ard.biesheuvel@linaro.org> (raw) This cleans up the PE/COFF EFI header, by taking some of Mark's patches and use them to replace open coded constants with symbolic ones, and remove incorrect values or unused sections. Finally, it updates the section layout so that the kernel Image can be mapped in a way that does not require setting RWX permissions anywhere. Note that this is currently not a huge win, given that most current UEFI implementations map all of RAM RWX by default, but this is finally gaining some attention, and work is underway to make the PE/COFF loader in EDK2 adhere to the section permissions, which would also allow the RAM mapping to default to non-executable. Work in progress nonetheless... Ard Biesheuvel (5): arm64: efi: move EFI header and related data to a separate .S file arm64: efi: ensure that the PE/COFF header pointer appears at offset 0x3c arm64: efi: remove pointless dummy .reloc section arm64: efi: replace open coded constants with symbolic ones arm64: efi: split Image code and data into separate PE/COFF sections Mark Rutland (2): include: pe.h: allow for use in assembly include: pe.h: add some missing definitions arch/arm64/kernel/efi-header.S | 178 ++++++++++++++++++++ arch/arm64/kernel/head.S | 176 +------------------ arch/arm64/kernel/vmlinux.lds.S | 5 + include/linux/pe.h | 177 +++++++++---------- 4 files changed, 280 insertions(+), 256 deletions(-) create mode 100644 arch/arm64/kernel/efi-header.S -- 2.7.4
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From: Ard Biesheuvel <ard.biesheuvel@linaro.org> To: linux-arm-kernel@lists.infradead.org, will.deacon@arm.com, catalin.marinas@arm.com, mark.rutland@arm.com Cc: labbott@fedoraproject.org, kernel-hardening@lists.openwall.com, leif.lindholm@linaro.org, pjones@redhat.com, Ard Biesheuvel <ard.biesheuvel@linaro.org> Subject: [kernel-hardening] [PATCH 0/7] arm64: efi: PE/COFF cleanup/hardening Date: Mon, 6 Feb 2017 16:24:28 +0000 [thread overview] Message-ID: <1486398275-3966-1-git-send-email-ard.biesheuvel@linaro.org> (raw) This cleans up the PE/COFF EFI header, by taking some of Mark's patches and use them to replace open coded constants with symbolic ones, and remove incorrect values or unused sections. Finally, it updates the section layout so that the kernel Image can be mapped in a way that does not require setting RWX permissions anywhere. Note that this is currently not a huge win, given that most current UEFI implementations map all of RAM RWX by default, but this is finally gaining some attention, and work is underway to make the PE/COFF loader in EDK2 adhere to the section permissions, which would also allow the RAM mapping to default to non-executable. Work in progress nonetheless... Ard Biesheuvel (5): arm64: efi: move EFI header and related data to a separate .S file arm64: efi: ensure that the PE/COFF header pointer appears at offset 0x3c arm64: efi: remove pointless dummy .reloc section arm64: efi: replace open coded constants with symbolic ones arm64: efi: split Image code and data into separate PE/COFF sections Mark Rutland (2): include: pe.h: allow for use in assembly include: pe.h: add some missing definitions arch/arm64/kernel/efi-header.S | 178 ++++++++++++++++++++ arch/arm64/kernel/head.S | 176 +------------------ arch/arm64/kernel/vmlinux.lds.S | 5 + include/linux/pe.h | 177 +++++++++---------- 4 files changed, 280 insertions(+), 256 deletions(-) create mode 100644 arch/arm64/kernel/efi-header.S -- 2.7.4
next reply other threads:[~2017-02-06 16:24 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-02-06 16:24 Ard Biesheuvel [this message] 2017-02-06 16:24 ` [kernel-hardening] [PATCH 0/7] arm64: efi: PE/COFF cleanup/hardening Ard Biesheuvel 2017-02-06 16:24 ` [PATCH 1/7] include: pe.h: allow for use in assembly Ard Biesheuvel 2017-02-06 16:24 ` [kernel-hardening] " Ard Biesheuvel 2017-02-06 16:33 ` Mark Rutland 2017-02-06 16:33 ` [kernel-hardening] " Mark Rutland 2017-02-06 16:40 ` Ard Biesheuvel 2017-02-06 16:40 ` [kernel-hardening] " Ard Biesheuvel 2017-02-06 16:24 ` [PATCH 2/7] include: pe.h: add some missing definitions Ard Biesheuvel 2017-02-06 16:24 ` [kernel-hardening] " Ard Biesheuvel 2017-02-06 16:24 ` [PATCH 3/7] arm64: efi: move EFI header and related data to a separate .S file Ard Biesheuvel 2017-02-06 16:24 ` [kernel-hardening] " Ard Biesheuvel 2017-02-06 17:03 ` Mark Rutland 2017-02-06 17:03 ` [kernel-hardening] " Mark Rutland 2017-02-06 17:07 ` Ard Biesheuvel 2017-02-06 17:07 ` [kernel-hardening] " Ard Biesheuvel 2017-02-06 16:24 ` [PATCH 4/7] arm64: efi: ensure that the PE/COFF header pointer appears at offset 0x3c Ard Biesheuvel 2017-02-06 16:24 ` [kernel-hardening] " Ard Biesheuvel 2017-02-06 17:05 ` Mark Rutland 2017-02-06 17:05 ` [kernel-hardening] " Mark Rutland 2017-02-06 16:24 ` [PATCH 5/7] arm64: efi: remove pointless dummy .reloc section Ard Biesheuvel 2017-02-06 16:24 ` [kernel-hardening] " Ard Biesheuvel 2017-02-06 17:06 ` Mark Rutland 2017-02-06 17:06 ` [kernel-hardening] " Mark Rutland 2017-02-07 18:30 ` Peter Jones 2017-02-07 18:30 ` [kernel-hardening] " Peter Jones 2017-02-06 16:24 ` [PATCH 6/7] arm64: efi: replace open coded constants with symbolic ones Ard Biesheuvel 2017-02-06 16:24 ` [kernel-hardening] " Ard Biesheuvel 2017-02-06 17:13 ` Mark Rutland 2017-02-06 17:13 ` [kernel-hardening] " Mark Rutland 2017-02-06 16:24 ` [PATCH 7/7] arm64: efi: split Image code and data into separate PE/COFF sections Ard Biesheuvel 2017-02-06 16:24 ` [kernel-hardening] " Ard Biesheuvel
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