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sys_remap_file_pages: fix ->vm_file accounting

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Fix ->vm_file accounting, mmap_region() may do do_munmap().

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2008-02-04 22:27:18 -08:00 committed by Linus Torvalds
parent c0b49b0d16
commit 8a459e44ad
1 changed files with 4 additions and 1 deletions
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5
mm/fremap.c
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@ -190,10 +190,13 @@ asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size,
*/ */
if (mapping_cap_account_dirty(mapping)) { if (mapping_cap_account_dirty(mapping)) {
unsigned long addr; unsigned long addr;
struct file *file = vma->vm_file;
flags &= MAP_NONBLOCK; flags &= MAP_NONBLOCK;
addr = mmap_region(vma->vm_file, start, size, get_file(file);
addr = mmap_region(file, start, size,
flags, vma->vm_flags, pgoff, 1); flags, vma->vm_flags, pgoff, 1);
fput(file);
if (IS_ERR_VALUE(addr)) { if (IS_ERR_VALUE(addr)) {
err = addr; err = addr;
} else { } else {