bio_integrity_verify() doesn't verify the data integrity at all.
In that function, after reading the data, bio->bi_idx will be
equal to bio->bi_vcnt because of bio_advance(),
so bio_for_each_segment_all() should be used, not
bio_for_each_segment().
bio_advance() should not change the integrity data
bio_integrity_advance() unless the BIO is being trimmed.
Linux-commit: 63573e359d052e506d305c263576499f06355985

Index: linux-3.10.0-693.21.1.el7.x86_64/fs/bio.c
===================================================================
--- linux-3.10.0-693.21.1.el7.x86_64.orig/fs/bio.c
+++ linux-3.10.0-693.21.1.el7.x86_64/fs/bio.c
@@ -870,9 +870,6 @@ EXPORT_SYMBOL(submit_bio_wait);
  */
 void bio_advance(struct bio *bio, unsigned bytes)
 {
-	if (bio_integrity(bio))
-		bio_integrity_advance(bio, bytes);
-
 	bio->bi_sector += bytes >> 9;
 	bio->bi_size -= bytes;
 
@@ -1973,6 +1970,9 @@ void bio_trim(struct bio *bio, int offse
 
 	clear_bit(BIO_SEG_VALID, &bio->bi_flags);
 
+	if (bio_integrity(bio))
+		bio_integrity_advance(bio, offset << 9);
+
 	bio_advance(bio, offset << 9);
 
 	bio->bi_size = size;
Index: linux-3.10.0-693.21.1.el7.x86_64/fs/bio-integrity.c
===================================================================
--- linux-3.10.0-693.21.1.el7.x86_64.orig/fs/bio-integrity.c
+++ linux-3.10.0-693.21.1.el7.x86_64/fs/bio-integrity.c
@@ -463,7 +463,11 @@ static int bio_integrity_verify(struct b
 	bix.disk_name = bio->bi_bdev->bd_disk->disk_name;
 	bix.sector_size = bi->sector_size;
 
-	bio_for_each_segment(bv, bio, i) {
+	/*
+	 * bio->bi_idx might be equal to bio->bi_vcnt after __bio_advance(),
+	 * So use bio_for_each_segment_all() not bio_for_each_segment().
+	 */
+	bio_for_each_segment_all(bv, bio, i) {
 		void *kaddr = kmap_atomic(bv->bv_page);
 		bix.data_buf = kaddr + bv->bv_offset;
 		bix.data_size = bv->bv_len;