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Diffstat (limited to 'mm')
-rw-r--r--mm/mmap.c11
-rw-r--r--mm/nommu.c3
2 files changed, 12 insertions, 2 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index acfc13f23ca0..15678aa6ec73 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -912,6 +912,9 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
if (!len)
return -EINVAL;
+ if (!(flags & MAP_FIXED))
+ addr = round_hint_to_min(addr);
+
error = arch_mmap_check(addr, len, flags);
if (error)
return error;
@@ -1615,6 +1618,12 @@ static inline int expand_downwards(struct vm_area_struct *vma,
*/
if (unlikely(anon_vma_prepare(vma)))
return -ENOMEM;
+
+ address &= PAGE_MASK;
+ error = security_file_mmap(0, 0, 0, 0, address, 1);
+ if (error)
+ return error;
+
anon_vma_lock(vma);
/*
@@ -1622,8 +1631,6 @@ static inline int expand_downwards(struct vm_area_struct *vma,
* is required to hold the mmap_sem in read mode. We need the
* anon_vma lock to serialize against concurrent expand_stacks.
*/
- address &= PAGE_MASK;
- error = 0;
/* Somebody else might have raced and expanded it already */
if (address < vma->vm_start) {
diff --git a/mm/nommu.c b/mm/nommu.c
index 35622c590925..b989cb928a7c 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -829,6 +829,9 @@ unsigned long do_mmap_pgoff(struct file *file,
void *result;
int ret;
+ if (!(flags & MAP_FIXED))
+ addr = round_hint_to_min(addr);
+
/* decide whether we should attempt the mapping, and if so what sort of
* mapping */
ret = validate_mmap_request(file, addr, len, prot, flags, pgoff,