On Wed, Jun 12, 2013 at 10:23:27AM -0700, Laura Abbott wrote: > Hi, > > This is an RFC to allow CONFIG_DEBUG_SET_MODULE_RONX to be used on ARM. The > current config description from x86 describes it best: > > This option helps catch unintended modifications to loadable > kernel module's text and read-only data. It also prevents execution > of module data. Such protection may interfere with run-time code > patching and dynamic kernel tracing - and they might also protect > against certain classes of kernel exploits. > > ARM was missing a few functions to modify the page tables so those have been > added. I believe modules are always mapped with pages so changing them at map > time should be acceptable. Comments/concerns are appreciated. I've just tested this and it seems to work: ---[ Modules ]--- 0xbf000000-0xbf002000 8K ro x MEM/CACHED/WBRA 0xbf002000-0xbf003000 4K ro NX MEM/CACHED/WBRA 0xbf003000-0xbf005000 8K RW NX MEM/CACHED/WBRA 0xbf009000-0xbf00b000 8K ro x MEM/CACHED/WBRA 0xbf00b000-0xbf00c000 4K ro NX MEM/CACHED/WBRA 0xbf00c000-0xbf00e000 8K RW NX MEM/CACHED/WBRA 0xbf012000-0xbf013000 4K ro x MEM/CACHED/WBRA 0xbf013000-0xbf014000 4K ro NX MEM/CACHED/WBRA 0xbf014000-0xbf016000 8K RW NX MEM/CACHED/WBRA 0xbf01a000-0xbf01c000 8K ro x MEM/CACHED/WBRA 0xbf01c000-0xbf01d000 4K ro NX MEM/CACHED/WBRA 0xbf01d000-0xbf01f000 8K RW NX MEM/CACHED/WBRA 0xbf024000-0xbf025000 4K ro x MEM/CACHED/WBRA 0xbf025000-0xbf026000 4K ro NX MEM/CACHED/WBRA 0xbf026000-0xbf028000 8K RW NX MEM/CACHED/WBRA 0xbf02c000-0xbf033000 28K ro x MEM/CACHED/WBRA 0xbf033000-0xbf035000 8K ro NX MEM/CACHED/WBRA 0xbf035000-0xbf03a000 20K RW NX MEM/CACHED/WBRA 0xbf041000-0xbf043000 8K ro x MEM/CACHED/WBRA 0xbf043000-0xbf045000 8K ro NX MEM/CACHED/WBRA 0xbf045000-0xbf048000 12K RW NX MEM/CACHED/WBRA 0xbf04e000-0xbf04f000 4K ro x MEM/CACHED/WBRA 0xbf04f000-0xbf050000 4K ro NX MEM/CACHED/WBRA 0xbf050000-0xbf052000 8K RW NX MEM/CACHED/WBRA 0xbf056000-0xbf05f000 36K ro x MEM/CACHED/WBRA 0xbf05f000-0xbf061000 8K ro NX MEM/CACHED/WBRA 0xbf061000-0xbf064000 12K RW NX MEM/CACHED/WBRA -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
