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-rw-r--r--fs/binfmt_elf.c6
-rw-r--r--include/linux/sched.h3
-rw-r--r--mm/mmap.c2
3 files changed, 9 insertions, 2 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index f34078d..303983f 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -941,9 +941,13 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
current->mm->start_stack = bprm->p;
#ifdef arch_randomize_brk
- if ((current->flags & PF_RANDOMIZE) && (randomize_va_space > 1))
+ if ((current->flags & PF_RANDOMIZE) && (randomize_va_space > 1)) {
current->mm->brk = current->mm->start_brk =
arch_randomize_brk(current->mm);
+#ifdef CONFIG_COMPAT_BRK
+ current->brk_randomized = 1;
+#endif
+ }
#endif
if (current->personality & MMAP_PAGE_ZERO) {
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4ec2c02..18d63ce 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1254,6 +1254,9 @@ struct task_struct {
#endif
struct mm_struct *mm, *active_mm;
+#ifdef CONFIG_COMPAT_BRK
+ unsigned brk_randomized:1;
+#endif
#if defined(SPLIT_RSS_COUNTING)
struct task_rss_stat rss_stat;
#endif
diff --git a/mm/mmap.c b/mm/mmap.c
index 8c05e5b..e27e0cf 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -259,7 +259,7 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
* randomize_va_space to 2, which will still cause mm->start_brk
* to be arbitrarily shifted
*/
- if (mm->start_brk > PAGE_ALIGN(mm->end_data))
+ if (current->brk_randomized)
min_brk = mm->start_brk;
else
min_brk = mm->end_data;
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