Do not advance pio past bio end - this should not happen but try to catch and log it as an error.
https://virtuozzo.atlassian.net/browse/VSTOR-91821 Signed-off-by: Alexander Atanasov <alexander.atana...@virtuozzo.com> --- drivers/md/dm-ploop-map.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-ploop-map.c b/drivers/md/dm-ploop-map.c index 7d531564b24c..fc2d99c3a8d0 100644 --- a/drivers/md/dm-ploop-map.c +++ b/drivers/md/dm-ploop-map.c @@ -271,8 +271,17 @@ static void ploop_pio_advance(struct pio *pio, unsigned int bytes) if (op_is_discard(pio->bi_op)) iter->bi_size -= bytes; - else + else { + if (bytes > iter->bi_size) { + struct ploop *ploop = pio->ploop; + + PL_ERR("advance past bio end\n"); + bytes = iter->bi_size; + if (!bytes) + return; + } bvec_iter_advance(pio->bi_io_vec, iter, bytes); + } } static struct pio *ploop_split_and_chain_pio(struct ploop *ploop, -- 2.43.0 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
