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-rw-r--r--mm/mmap.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 9da23c1..da3fa90 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1267,6 +1267,9 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
return (mm->free_area_cache = addr-len);
}
+ if (mm->mmap_base < len)
+ goto bottomup;
+
addr = mm->mmap_base-len;
do {
@@ -1288,6 +1291,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
addr = vma->vm_start-len;
} while (len < vma->vm_start);
+bottomup:
/*
* A failed mmap() very likely causes application failure,
* so fall back to the bottom-up function here. This scenario
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