From 7729ac5efe156129d172784fedeaddb2167a1914 Mon Sep 17 00:00:00 2001 From: Oleg Drokin Date: Mon, 28 Nov 2005 13:43:53 -0800 Subject: [PATCH] [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: Andrew Morton Signed-off-by: Linus Torvalds --- fs/reiserfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index 5f82352b97e..0a044ad9888 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -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; -- 2.41.1