[PATCH 09/10] ntfs3: handle set_blocksize failures

[Christoph Hellwig <hch@lst.de>]

ntfs3 uses buffer_heads, which don't handle block size > PAGE_SIZE well.
Without this, mounting we will hit the

        BUG_ON(offset >= folio_size(folio));

in folio_set_bh on the first __bread_gfp call.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/ntfs3/super.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index 004f59937559..3305fe406cb2 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -1174,7 +1174,10 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,
 	rec->total = cpu_to_le32(sbi->record_size);
 	((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END;
 
-	sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE));
+	if (!sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE))) {
+		err = -EINVAL;
+		goto out;
+	}
 
 	sbi->block_mask = sb->s_blocksize - 1;
 	sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits;
@@ -1225,7 +1228,8 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,
 			/*
 			 * Try alternative boot (last sector)
 			 */
-			sb_set_blocksize(sb, block_size);
+			if (!sb_set_blocksize(sb, block_size))
+				return -EINVAL;
 			hint = "Alternative boot";
 			dev_size = dev_size0; /* restore original size. */
 			goto read_boot;
-- 
2.53.0