Commit 3f1d5bad authored by Jan Kara's avatar Jan Kara Committed by Theodore Ts'o

ext4: fix off-by-in in loop termination in ext4_find_unwritten_pgoff()

There is an off-by-one error in loop termination conditions in
ext4_find_unwritten_pgoff() since 'end' may index a page beyond end of
desired range if 'endoff' is page aligned. It doesn't have any visible
effects but still it is good to fix it.
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 7d95eddf
...@@ -474,7 +474,7 @@ static int ext4_find_unwritten_pgoff(struct inode *inode, ...@@ -474,7 +474,7 @@ static int ext4_find_unwritten_pgoff(struct inode *inode,
endoff = (loff_t)end_blk << blkbits; endoff = (loff_t)end_blk << blkbits;
index = startoff >> PAGE_SHIFT; index = startoff >> PAGE_SHIFT;
end = endoff >> PAGE_SHIFT; end = (endoff - 1) >> PAGE_SHIFT;
pagevec_init(&pvec, 0); pagevec_init(&pvec, 0);
do { do {
......
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