| From eaf3793728d07d995f1e74250b2d0005f7ae98b5 Mon Sep 17 00:00:00 2001 |
| From: Jan Kara <jack@suse.cz> |
| Date: Fri, 31 May 2013 19:33:42 -0400 |
| Subject: ext4: fix data offset overflow on 32-bit archs in ext4_inline_data_fiemap() |
| |
| From: Jan Kara <jack@suse.cz> |
| |
| commit eaf3793728d07d995f1e74250b2d0005f7ae98b5 upstream. |
| |
| On 32-bit archs when sector_t is defined as 32-bit the logic computing |
| data offset in ext4_inline_data_fiemap(). Fix that by properly typing |
| the shifted value. |
| |
| Signed-off-by: Jan Kara <jack@suse.cz> |
| Signed-off-by: Theodore Ts'o <tytso@mit.edu> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| fs/ext4/inline.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/fs/ext4/inline.c |
| +++ b/fs/ext4/inline.c |
| @@ -1702,7 +1702,7 @@ int ext4_inline_data_fiemap(struct inode |
| if (error) |
| goto out; |
| |
| - physical = iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits; |
| + physical = (__u64)iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits; |
| physical += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data; |
| physical += offsetof(struct ext4_inode, i_block); |
| length = i_size_read(inode); |
