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-rw-r--r--mm/mmap.c54
1 files changed, 6 insertions, 48 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 4a9c2a3..3edfcdf 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -971,15 +971,13 @@ static inline unsigned long round_hint_to_min(unsigned long hint)
* The caller must hold down_write(&current->mm->mmap_sem).
*/
-static unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
+unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
unsigned long len, unsigned long prot,
unsigned long flags, unsigned long pgoff)
{
struct mm_struct * mm = current->mm;
struct inode *inode;
vm_flags_t vm_flags;
- int error;
- unsigned long reqprot = prot;
/*
* Does the application expect PROT_READ to imply PROT_EXEC?
@@ -1101,39 +1099,9 @@ static unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
}
}
- error = security_file_mmap(file, reqprot, prot, flags, addr, 0);
- if (error)
- return error;
-
return mmap_region(file, addr, len, flags, vm_flags, pgoff);
}
-unsigned long do_mmap(struct file *file, unsigned long addr,
- unsigned long len, unsigned long prot,
- unsigned long flag, unsigned long offset)
-{
- if (unlikely(offset + PAGE_ALIGN(len) < offset))
- return -EINVAL;
- if (unlikely(offset & ~PAGE_MASK))
- return -EINVAL;
- return do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
-}
-EXPORT_SYMBOL(do_mmap);
-
-unsigned long vm_mmap(struct file *file, unsigned long addr,
- unsigned long len, unsigned long prot,
- unsigned long flag, unsigned long offset)
-{
- unsigned long ret;
- struct mm_struct *mm = current->mm;
-
- down_write(&mm->mmap_sem);
- ret = do_mmap(file, addr, len, prot, flag, offset);
- up_write(&mm->mmap_sem);
- return ret;
-}
-EXPORT_SYMBOL(vm_mmap);
-
SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, unsigned long, pgoff)
@@ -1165,10 +1133,7 @@ SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len,
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
- down_write(&current->mm->mmap_sem);
- retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
- up_write(&current->mm->mmap_sem);
-
+ retval = vm_mmap_pgoff(file, addr, len, prot, flags, pgoff);
if (file)
fput(file);
out:
@@ -1629,7 +1594,9 @@ get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,
if (addr & ~PAGE_MASK)
return -EINVAL;
- return arch_rebalance_pgtables(addr, len);
+ addr = arch_rebalance_pgtables(addr, len);
+ error = security_mmap_addr(addr);
+ return error ? error : addr;
}
EXPORT_SYMBOL(get_unmapped_area);
@@ -1819,7 +1786,7 @@ int expand_downwards(struct vm_area_struct *vma,
return -ENOMEM;
address &= PAGE_MASK;
- error = security_file_mmap(NULL, 0, 0, 0, address, 1);
+ error = security_mmap_addr(address);
if (error)
return error;
@@ -2159,7 +2126,6 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len)
return 0;
}
-EXPORT_SYMBOL(do_munmap);
int vm_munmap(unsigned long start, size_t len)
{
@@ -2207,10 +2173,6 @@ static unsigned long do_brk(unsigned long addr, unsigned long len)
if (!len)
return addr;
- error = security_file_mmap(NULL, 0, 0, 0, addr, 1);
- if (error)
- return error;
-
flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;
error = get_unmapped_area(NULL, addr, len, 0, MAP_FIXED);
@@ -2563,10 +2525,6 @@ int install_special_mapping(struct mm_struct *mm,
vma->vm_ops = &special_mapping_vmops;
vma->vm_private_data = pages;
- ret = security_file_mmap(NULL, 0, 0, 0, vma->vm_start, 1);
- if (ret)
- goto out;
-
ret = insert_vm_struct(mm, vma);
if (ret)
goto out;
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