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| author | Jinbum Park <jinb.park7@gmail.com> | 2017-12-12 03:43:57 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2018-01-21 18:32:20 +0300 |
| commit | a8e53c151fe7ac52a1c13a6ace0c9e8e0f61260c (patch) | |
| tree | bdd795b97c9311d45e626e5b90814afcd78567a0 /arch/arm/include/asm/ptdump.h | |
| parent | d02ca6d76ba7f089706db555ee19f3775bc42740 (diff) | |
| download | linux-a8e53c151fe7ac52a1c13a6ace0c9e8e0f61260c.tar.xz | |
ARM: 8737/1: mm: dump: add checking for writable and executable
Page mappings with full RWX permissions are a security risk.
x86, arm64 has an option to walk the page tables
and dump any bad pages.
(1404d6f13e47
("arm64: dump: Add checking for writable and exectuable pages"))
Add a similar implementation for arm.
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Jinbum Park <jinb.park7@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/ptdump.h')
| -rw-r--r-- | arch/arm/include/asm/ptdump.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/include/asm/ptdump.h b/arch/arm/include/asm/ptdump.h index 45d2de313eda..3ebf9718288d 100644 --- a/arch/arm/include/asm/ptdump.h +++ b/arch/arm/include/asm/ptdump.h @@ -30,6 +30,14 @@ static inline int ptdump_debugfs_register(struct ptdump_info *info, } #endif /* CONFIG_ARM_PTDUMP_DEBUGFS */ +void ptdump_check_wx(void); + #endif /* CONFIG_ARM_PTDUMP_CORE */ +#ifdef CONFIG_DEBUG_WX +#define debug_checkwx() ptdump_check_wx() +#else +#define debug_checkwx() do { } while (0) +#endif + #endif /* __ASM_PTDUMP_H */ |