kernel/arch/arm64/include/asm/ptdump.h, branch linux-5.1.yHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-5.1.y2019-01-31T17:38:19Zarm64: dump: no need to check return value of debugfs_create functions2019-01-31T17:38:19ZGreg Kroah-Hartmangregkh@linuxfoundation.org2019-01-22T14:41:11Zurn:sha1:e2a2e56e40822ab78e304198387f61314af7d7ce
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Cc: Will Deacon <will.deacon@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Peng Donglin <dolinux.peng@gmail.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: dump: Add checking for writable and exectuable pages2016-11-07T18:15:04ZLaura Abbottlabbott@redhat.com2016-10-27T16:27:34Zurn:sha1:1404d6f13e47c42f155e3c6a611b1bf4dd35dde9
Page mappings with full RWX permissions are a security risk. x86
has an option to walk the page tables and dump any bad pages.
(See e1a58320a38d ("x86/mm: Warn on W^X mappings")). Add a similar
implementation for arm64.
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[catalin.marinas@arm.com: folded fix for KASan out of bounds from Mark Rutland]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: dump: Remove max_addr2016-11-07T18:15:04ZLaura Abbottlabbott@redhat.com2016-10-27T16:27:33Zurn:sha1:cfd69e9551a1b1d20a7ba030a0990aa370817f54
max_addr was added as part of struct ptdump_info but has never actually
been used. Remove it.
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: dump: Make ptdump debugfs a separate option2016-11-07T18:15:04ZLaura Abbottlabbott@redhat.com2016-10-27T16:27:31Zurn:sha1:4ddb9bf83349b4f4f8178e58c3654ac7ec7edbc6
ptdump_register currently initializes a set of page table information and
registers debugfs. There are uses for the ptdump option without wanting the
debugfs options. Split this out to make it a separate option.
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: mm: dump: make page table dumping reusable2016-06-21T14:09:11ZMark Rutlandmark.rutland@arm.com2016-05-31T13:49:01Zurn:sha1:4674fdb9f1493f12a15c5f2158f260060b58953e
For debugging purposes, it would be nice if we could export page tables
other than the swapper_pg_dir to userspace. To enable this, this patch
refactors the arm64 page table dumping code such that multiple tables
may be registered with the framework, and exported under debugfs.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Laura Abbott <labbott@fedoraproject.org>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>