Commit d4c5cdb3 authored Jun 27, 2007 by Michael Halcrow Committed by Linus Torvalds Jun 28, 2007

zero out last page for llseek/write



When one llseek's past the end of the file and then writes, every page past
the previous end of the file should be cleared.  Trevor found that the code,
as is, does not assure that the very last page is always cleared.  This patch
takes care of that.

Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent e10f281b

fs/ecryptfs/mmap.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -422,6 +422,8 @@ static int ecryptfs_prepare_write(struct file file, struct page page,
		goto out;
		}
		}
		if (end_of_prev_pg_pos + 1 > i_size_read(page->mapping->host))
		zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
		}
		out:
		return rc;

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