If we have an origin target with no snapshots, o->split_boundary is set to 0. This causes BUG at block/bio.c:1474
This patch fixes the bug - if there are no snapshots, split_boundary is set to 0x80000000U. Signed-off-by: Mikulas Patocka <[email protected]> Cc: [email protected] Reported-by: Michael Tokarev <[email protected]> Index: linux-2.6/drivers/md/dm-snap.c =================================================================== --- linux-2.6.orig/drivers/md/dm-snap.c +++ linux-2.6/drivers/md/dm-snap.c @@ -854,12 +854,11 @@ static int dm_add_exception(void *contex static uint32_t __minimum_chunk_size(struct origin *o) { struct dm_snapshot *snap; - unsigned chunk_size = 0; + unsigned chunk_size = 0x80000000U; if (o) list_for_each_entry(snap, &o->snapshots, list) - chunk_size = min_not_zero(chunk_size, - snap->store->chunk_size); + chunk_size = min(chunk_size, snap->store->chunk_size); return (uint32_t) chunk_size; } -- dm-devel mailing list [email protected] https://listman.redhat.com/mailman/listinfo/dm-devel
