3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andreas Gruenbacher <agruenba@xxxxxxxxxx> commit 2d29f6b96d8f80322ed2dd895bca590491c38d34 upstream. Fix the resource group wrap-around logic in gfs2_rbm_find that commit e579ed4f44 broke. The bug can lead to unnecessary repeated scanning of the same bitmaps; there is a risk that future changes will turn this into an endless loop. Fixes: e579ed4f44 ("GFS2: Introduce rbm field bii") Cc: stable@xxxxxxxxxxxxxxx # v3.13+ Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx> Signed-off-by: Bob Peterson <rpeterso@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/gfs2/rgrp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -1671,9 +1671,9 @@ static int gfs2_rbm_find(struct gfs2_rbm goto next_iter; } if (ret == -E2BIG) { + n += rbm->bii - initial_bii; rbm->bii = 0; rbm->offset = 0; - n += (rbm->bii - initial_bii); goto res_covered_end_of_rgrp; } return ret;