qcow2_for_each_bvec tries to advance the bvec with bv_len but if bv_len is zero it goes into an endless loop. To fix this check for non zero bv_len, there is already check for size.
https://virtuozzo.atlassian.net/browse/PSBM-157999 Signed-off-by: Alexander Atanasov <alexander.atana...@virtuozzo.com> --- drivers/md/dm-qcow2-map.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm-qcow2-map.c b/drivers/md/dm-qcow2-map.c index 53bed6c0a30a..810d76934d64 100644 --- a/drivers/md/dm-qcow2-map.c +++ b/drivers/md/dm-qcow2-map.c @@ -24,8 +24,8 @@ #define qcow2_for_each_bvec(iter, bv, start_iter, from_bv) \ for (iter = start_iter; \ - iter.bi_size && ((bv = mp_bvec_iter_bvec(from_bv, iter)), 1); \ - bvec_iter_advance(from_bv, &iter, bv.bv_len)) + iter.bi_size && ((bv = mp_bvec_iter_bvec(from_bv, iter)), 1) \ + && bv.bv_len; bvec_iter_advance(from_bv, &iter, bv.bv_len)) struct qcow2_map_item { /* -- 2.43.0 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
