diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 8ec24dbb180f..5ec31299f1c3 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -1889,6 +1889,8 @@ static int verify_one_sector(struct btrfs_raid_bio *rbio,
 {
 	struct btrfs_fs_info *fs_info = rbio->bioc->fs_info;
 	phys_addr_t *paddrs;
+	const unsigned int total_sector_nr =
+		stripe_nr * rbio->stripe_nsectors + sector_nr;
 	u8 csum_buf[BTRFS_CSUM_SIZE];
 	u8 *csum_expected;
 
@@ -1898,6 +1900,11 @@ static int verify_one_sector(struct btrfs_raid_bio *rbio,
 	/* No way to verify P/Q as they are not covered by data csum. */
 	if (stripe_nr >= rbio->nr_data)
 		return 0;
+
+	/* No data checksum for this sector. */
+	if (!test_bit(total_sector_nr, rbio->csum_bitmap))
+		return 0;
+
 	/*
 	 * If we're rebuilding a read, we have to use pages from the
 	 * bio list if possible.
@@ -1908,9 +1915,7 @@ static int verify_one_sector(struct btrfs_raid_bio *rbio,
 		paddrs = rbio_stripe_paddrs(rbio, stripe_nr, sector_nr);
 	}
 
-	csum_expected = rbio->csum_buf +
-			(stripe_nr * rbio->stripe_nsectors + sector_nr) *
-			fs_info->csum_size;
+	csum_expected = rbio->csum_buf + total_sector_nr * fs_info->csum_size;
 	calculate_block_csum_paddrs(fs_info, paddrs, csum_buf);
 	if (unlikely(memcmp(csum_buf, csum_expected, fs_info->csum_size) != 0))
 		return -EIO;