From: Christoph Hellwig <hch@lst.de>
Date: Mon, 11 May 2026 07:16:47 +0000 (+0200)
Subject: hpfs: handle set_blocksize failures
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a405996f23e04942aad064ab8d50c55827482872;p=thirdparty%2Fkernel%2Flinux.git

hpfs: handle set_blocksize failures

hpfs uses buffer_heads, which don't handle block size > PAGE_SIZE well.
Without this, mounting 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>
Link: https://patch.msgid.link/20260511071701.2456211-3-hch@lst.de
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
---

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index c16d5d4caeade..8fbdbf0806276 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -523,7 +523,8 @@ static int hpfs_fill_super(struct super_block *s, struct fs_context *fc)
 	hpfs_lock(s);
 
 	/*sbi->sb_mounting = 1;*/
-	sb_set_blocksize(s, 512);
+	if (!sb_set_blocksize(s, 512))
+		goto bail0;
 	sbi->sb_fs_size = -1;
 	if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
 	if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;