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Subject[PATCH] sys_remap_file_pages: fix ->vm_file accounting
Fix ->vm_file accounting, mmap_region() may do do_munmap().

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>

--- MM/mm/fremap.c~RFP 2007-10-25 16:22:12.000000000 +0400
+++ MM/mm/fremap.c 2008-01-30 16:56:39.000000000 +0300
@@ -192,8 +192,10 @@ asmlinkage long sys_remap_file_pages(uns
unsigned long addr;

flags &= MAP_NONBLOCK;
+ get_file(vma->vm_file);
addr = mmap_region(vma->vm_file, start, size,
flags, vma->vm_flags, pgoff, 1);
+ fput(vma->vm_file);
if (IS_ERR_VALUE(addr)) {
err = addr;
} else {


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