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| author | David S. Miller <davem@davemloft.net> | 2009-12-10 23:05:23 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-12-10 23:05:23 -0800 |
| commit | fb34035e7b4bb3edc7c2dc0683cfe21f57a9574d (patch) | |
| tree | ddde17e5690d77f4f61c6271fc8b6f520c746851 /arch/sparc/Kconfig.debug | |
| parent | 4ed5d5e4299f42438dd5ac6dcb1f2168ea4fb02a (diff) | |
| download | kernel_goldelico_gta04-fb34035e7b4bb3edc7c2dc0683cfe21f57a9574d.zip kernel_goldelico_gta04-fb34035e7b4bb3edc7c2dc0683cfe21f57a9574d.tar.gz kernel_goldelico_gta04-fb34035e7b4bb3edc7c2dc0683cfe21f57a9574d.tar.bz2 | |
sparc: Use __builtin_object_size() to validate the buffer size for copy_from_user()
This mirrors x86 commit 9f0cf4adb6aa0bfccf675c938124e68f7f06349d
(x86: Use __builtin_object_size() to validate the buffer size for copy_from_user())
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/Kconfig.debug')
| -rw-r--r-- | arch/sparc/Kconfig.debug | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/sparc/Kconfig.debug b/arch/sparc/Kconfig.debug index 90d5fe2..9d3c889 100644 --- a/arch/sparc/Kconfig.debug +++ b/arch/sparc/Kconfig.debug @@ -33,4 +33,18 @@ config FRAME_POINTER depends on MCOUNT default y +config DEBUG_STRICT_USER_COPY_CHECKS + bool "Strict copy size checks" + depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING + ---help--- + Enabling this option turns a certain set of sanity checks for user + copy operations into compile time failures. + + The copy_from_user() etc checks are there to help test if there + are sufficient security checks on the length argument of + the copy operation, by having gcc prove that the argument is + within bounds. + + If unsure, or if you run an older (pre 4.4) gcc, say N. + endmenu |