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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-05-24 00:06:26 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-05-24 00:06:26 -0700 |
| commit | b73077eb03f510a84b102fb97640e595a958403c (patch) | |
| tree | 8b639000418e2756bf6baece4e00e07d2534bccc /mm/mmap.c | |
| parent | 28350e330cfab46b60a1dbf763b678d859f9f3d9 (diff) | |
| parent | 9d2e173644bb5c42ff1b280fbdda3f195a7cf1f7 (diff) | |
Merge branch 'next' into for-linus
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 2ec8eb5a9cdd..e27e0cf0de03 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; @@ -1814,11 +1814,14 @@ static int expand_downwards(struct vm_area_struct *vma, size = vma->vm_end - address; grow = (vma->vm_start - address) >> PAGE_SHIFT; - error = acct_stack_growth(vma, size, grow); - if (!error) { - vma->vm_start = address; - vma->vm_pgoff -= grow; - perf_event_mmap(vma); + error = -ENOMEM; + if (grow <= vma->vm_pgoff) { + error = acct_stack_growth(vma, size, grow); + if (!error) { + vma->vm_start = address; + vma->vm_pgoff -= grow; + perf_event_mmap(vma); + } } } vma_unlock_anon_vma(vma); |