diff options
| author | David S. Miller <davem@davemloft.net> | 2009-09-24 15:13:11 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-24 15:13:11 -0700 |
| commit | 8b3f6af86378d0a10ca2f1ded1da124aef13b62c (patch) | |
| tree | de6ca90295730343c495be8d98be8efa322140ef /arch/x86/mm/mmap.c | |
| parent | 139d6065c83071d5f66cd013a274a43699f8e2c1 (diff) | |
| parent | 94e0fb086fc5663c38bbc0fe86d698be8314f82f (diff) | |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts:
drivers/staging/Kconfig
drivers/staging/Makefile
drivers/staging/cpc-usb/TODO
drivers/staging/cpc-usb/cpc-usb_drv.c
drivers/staging/cpc-usb/cpc.h
drivers/staging/cpc-usb/cpc_int.h
drivers/staging/cpc-usb/cpcusb.h
Diffstat (limited to 'arch/x86/mm/mmap.c')
| -rw-r--r-- | arch/x86/mm/mmap.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/x86/mm/mmap.c b/arch/x86/mm/mmap.c index 165829600566..c8191defc38a 100644 --- a/arch/x86/mm/mmap.c +++ b/arch/x86/mm/mmap.c @@ -29,13 +29,26 @@ #include <linux/random.h> #include <linux/limits.h> #include <linux/sched.h> +#include <asm/elf.h> + +static unsigned int stack_maxrandom_size(void) +{ + unsigned int max = 0; + if ((current->flags & PF_RANDOMIZE) && + !(current->personality & ADDR_NO_RANDOMIZE)) { + max = ((-1U) & STACK_RND_MASK) << PAGE_SHIFT; + } + + return max; +} + /* * Top of mmap area (just below the process stack). * - * Leave an at least ~128 MB hole. + * Leave an at least ~128 MB hole with possible stack randomization. */ -#define MIN_GAP (128*1024*1024) +#define MIN_GAP (128*1024*1024UL + stack_maxrandom_size()) #define MAX_GAP (TASK_SIZE/6*5) /* |