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| author | Helge Deller <deller@gmx.de> | 2010-02-01 20:56:33 +0100 |
|---|---|---|
| committer | Kyle McMartin <kyle@redhat.com> | 2010-03-06 23:54:09 +0100 |
| commit | 888c31fc83ddc7fcd9947cb67c5718b4e3dd5e1b (patch) | |
| tree | 15ef949561b6c8b319bb686eadec20c98148dfa3 /arch/parisc/Kconfig.debug | |
| parent | parisc: remove trailing space in messages (diff) | |
| download | linux-888c31fc83ddc7fcd9947cb67c5718b4e3dd5e1b.tar.xz linux-888c31fc83ddc7fcd9947cb67c5718b4e3dd5e1b.zip | |
parisc: add strict copy size checks (v2)
Add CONFIG_DEBUG_STRICT_USER_COPY_CHECKS, copied from the x86
implementation. Tested with 32 and 64bit kernel.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Diffstat (limited to 'arch/parisc/Kconfig.debug')
| -rw-r--r-- | arch/parisc/Kconfig.debug | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/parisc/Kconfig.debug b/arch/parisc/Kconfig.debug index bc989e522a04..7305ac8f7f5b 100644 --- a/arch/parisc/Kconfig.debug +++ b/arch/parisc/Kconfig.debug @@ -12,4 +12,18 @@ config DEBUG_RODATA portion of the kernel code won't be covered by a TLB anymore. If in doubt, say "N". +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 |