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Commit 7729ac5e authored by Oleg Drokin's avatar Oleg Drokin Committed by Linus Torvalds
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[PATCH] reiserfs: fix 32-bit overflow in map_block_for_writepage() 



I now see another overflow in reiserfs that should lead to data corruptions
with files that are bigger than 4G under certain circumstances when using
mmap.

Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 1a9c3f78

fs/reiserfs/inode.c

+1 −1
Original line number Diff line number Diff line
@@ -2194,7 +2194,7 @@ static int map_block_for_writepage(struct inode *inode, 
	INITIALIZE_PATH(path);

	int pos_in_item;

	int jbegin_count = JOURNAL_PER_BALANCE_CNT;

	loff_t byte_offset = (block << inode->i_sb->s_blocksize_bits) + 1;

	loff_t byte_offset = ((loff_t)block << inode->i_sb->s_blocksize_bits)+1;

	int retval;

	int use_get_block = 0;

	int bytes_copied = 0;