[PATCH] libblkid: Check that cluster size is nonzero when probing exFAT

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This should prevent division by zero in find_label()

Signed-off-by: Rostislav Skudnov <rostislav@xxxxxxxxxx>
---
 libblkid/src/superblocks/exfat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libblkid/src/superblocks/exfat.c b/libblkid/src/superblocks/exfat.c
index 3f1e75c..01ed30b 100644
--- a/libblkid/src/superblocks/exfat.c
+++ b/libblkid/src/superblocks/exfat.c
@@ -114,7 +114,7 @@ static int probe_exfat(blkid_probe pr, const struct blkid_idmag *mag)
 	struct exfat_entry_label *label;
 
 	sb = blkid_probe_get_sb(pr, mag, struct exfat_super_block);
-	if (!sb)
+	if (!sb || !CLUSTER_SIZE(sb))
 		return errno ? -errno : BLKID_PROBE_NONE;
 
 	label = find_label(pr, sb);
-- 
2.1.4

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