From: Jan Kara Date: Fri, 31 May 2013 23:33:42 +0000 (-0400) Subject: ext4: fix data offset overflow on 32-bit archs in ext4_inline_data_fiemap() X-Git-Tag: v3.9.11~9 X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=df8b4d47fceb1f64ddea20c233e7bb987cbbce19;p=unionfs-2.6.39.y.git ext4: fix data offset overflow on 32-bit archs in ext4_inline_data_fiemap() 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 Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index c0fd1a123f7..c46a01e58d1 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -1702,7 +1702,7 @@ int ext4_inline_data_fiemap(struct inode *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);