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authorOleg Drokin <green@linuxhacker.ru>2005-11-28 13:43:53 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-28 14:42:23 -0800
commit7729ac5efe156129d172784fedeaddb2167a1914 (patch)
treef0d28ced93c3482988e3e935e4a67ac4eed4f20a
parent1a9c3f78a32ddc4ec50f5da2cf2db5db6f442986 (diff)
[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 <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/reiserfs/inode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 5f82352b97e1..0a044ad98885 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;