Commit 22a6c837 authored by Darrick J. Wong's avatar Darrick J. Wong
Browse files

xfs: ubsan fixes 



Fix some complaints from the UBSAN about signed integer addition overflows.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
parent 712d361d

fs/xfs/xfs_aops.c

+3 −3
Original line number Diff line number Diff line
@@ -399,7 +399,7 @@ xfs_map_blocks( 
	       (ip->i_df.if_flags & XFS_IFEXTENTS));

	ASSERT(offset <= mp->m_super->s_maxbytes);



	if (offset + count > mp->m_super->s_maxbytes)

	if ((xfs_ufsize_t)offset + count > mp->m_super->s_maxbytes)

		count = mp->m_super->s_maxbytes - offset;

	end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count);

	offset_fsb = XFS_B_TO_FSBT(mp, offset);
@@ -1265,7 +1265,7 @@ xfs_map_trim_size( 
	if (mapping_size > size)

		mapping_size = size;

	if (offset < i_size_read(inode) &&

	    offset + mapping_size >= i_size_read(inode)) {

	    (xfs_ufsize_t)offset + mapping_size >= i_size_read(inode)) {

		/* limit mapping to block that spans EOF */

		mapping_size = roundup_64(i_size_read(inode) - offset,

					  i_blocksize(inode));
@@ -1312,7 +1312,7 @@ xfs_get_blocks( 
	lockmode = xfs_ilock_data_map_shared(ip);



	ASSERT(offset <= mp->m_super->s_maxbytes);

	if (offset + size > mp->m_super->s_maxbytes)

	if ((xfs_ufsize_t)offset + size > mp->m_super->s_maxbytes)

		size = mp->m_super->s_maxbytes - offset;

	end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + size);

	offset_fsb = XFS_B_TO_FSBT(mp, offset);