From 84d2f07e8e5e2424eec0f5acfef6792c924a0549 Mon Sep 17 00:00:00 2001 From: Steve French Date: Wed, 12 Oct 2005 15:32:05 -0700 Subject: CIFS: cifs_writepages should not write beyond end of file Signed-off-by: Dave Kleikamp Signed-off-by: Steve French --- fs/cifs/file.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 585a62aebd590c..23af20d5af7c41 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1011,6 +1011,7 @@ static int cifs_writepages(struct address_space *mapping, pgoff_t index; int is_range = 0; struct kvec iov[32]; + int len; int n_iov = 0; pgoff_t next; int nr_pages; @@ -1124,16 +1125,26 @@ retry: unlock_page(page); break; } + + if (page_offset(page) >= mapping->host->i_size) { + done = 1; + unlock_page(page); + break; + } + /* * BB can we get rid of this? pages are held by pvec */ page_cache_get(page); + len = min(mapping->host->i_size - page_offset(page), + (loff_t)PAGE_CACHE_SIZE); + /* reserve iov[0] for the smb header */ n_iov++; iov[n_iov].iov_base = kmap(page); - iov[n_iov].iov_len = PAGE_CACHE_SIZE; - bytes_to_write += PAGE_CACHE_SIZE; + iov[n_iov].iov_len = len; + bytes_to_write += len; if (first < 0) { first = i; -- cgit 1.2.3-korg