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mm: nommu: fix a potential memory leak in do_mmap_private() 

If f_op->read() fails and sysctl_nr_trim_pages > 1, there could be a
memory leak between @region->vm_end and @region->vm_top.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Namhyung Kim 2011-05-24 17:11:26 -07:00 committed by Linus Torvalds
parent d75a310c42
commit 7223bb4a82
1 changed files with 1 additions and 1 deletions
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mm/nommu.c
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@ -1217,7 +1217,7 @@ static int do_mmap_private(struct vm_area_struct *vma,
return 0;
error_free:
free_page_series(region->vm_start, region->vm_end);
free_page_series(region->vm_start, region->vm_top);
region->vm_start = vma->vm_start = 0;
region->vm_end = vma->vm_end = 0;
region->vm_top = 0;