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-rw-r--r--mm/mmap.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index e780d19..eab6fcb 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -220,6 +220,17 @@ asmlinkage unsigned long sys_brk(unsigned long brk)
if (brk < mm->end_code)
goto out;
+
+ /*
+ * Check against rlimit here. If this check is done later after the test
+ * of oldbrk with newbrk then it can escape the test and let the data
+ * segment grow beyond its set limit the in case where the limit is
+ * not page aligned -Ram Gupta
+ */
+ rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
+ if (rlim < RLIM_INFINITY && brk - mm->start_data > rlim)
+ goto out;
+
newbrk = PAGE_ALIGN(brk);
oldbrk = PAGE_ALIGN(mm->brk);
if (oldbrk == newbrk)
@@ -232,11 +243,6 @@ asmlinkage unsigned long sys_brk(unsigned long brk)
goto out;
}
- /* Check against rlimit.. */
- rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
- if (rlim < RLIM_INFINITY && brk - mm->start_data > rlim)
- goto out;
-
/* Check against existing mmap mappings. */
if (find_vma_intersection(mm, oldbrk, newbrk+PAGE_SIZE))
goto out;
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