tree 8de0c661310bd83ae3e37f07dfc8804759373251
parent 0e2af9296f4f9c4c815ced2beb21093af7c38644
author Darrick J. Wong <djwong@kernel.org> 1626119929 -0700
committer Darrick J. Wong <djwong@kernel.org> 1626368322 -0700

xfs: fix an integer overflow error in xfs_growfs_rt

During a realtime grow operation, we run a single transaction for each
rt bitmap block added to the filesystem.  This means that each step has
to be careful to increase sb_rblocks appropriately.

Fix the integer overflow error in this calculation that can happen when
the extent size is very large.  Found by running growfs to add a rt
volume to a filesystem formatted with a 1g rt extent size.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>