ocfs2: Fix memory overflow in cow_by_page.

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In ocfs2_duplicate_clusters_by_page, we calculate map_end
by shifting page_index. But actually in case we meet with
a large offset(say in a i686 box, poff_t is only 32 bits
and page_index=2056240), we will overflow. So change the
type of page_index to loff_t.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

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Tao Ma 2010-01-30 23:32:19 +08:00 • committed by Joel Becker

parent 26636bf6b2

commit d622b89a2f

1 changed files with 2 additions and 2 deletions

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fs/ocfs2/refcounttree.c

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