[PATCH 6.12 12/24] block: fix adding folio to bio

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

6.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ming Lei <ming.lei@redhat.com>

commit 26064d3e2b4d9a14df1072980e558c636fb023ea upstream.

>4GB folio is possible on some ARCHs, such as aarch64, 16GB hugepage
is supported, then 'offset' of folio can't be held in 'unsigned int',
cause warning in bio_add_folio_nofail() and IO failure.

Fix it by adjusting 'page' & trimming 'offset' so that `->bi_offset` won't
be overflow, and folio can be added to bio successfully.

Fixes: ed9832bc08db ("block: introduce folio awareness and add a bigger size from folio")
Cc: Kundan Kumar <kundan.kumar@samsung.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Gavin Shan <gshan@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20250312145136.2891229-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
[ The follow-up fix fbecd731de05 ("xfs: fix zoned GC data corruption due to
  wrong bv_offset") addresses issues in the file fs/xfs/xfs_zone_gc.c.  This
  file was first introduced in version v6.15-rc1. So don't backport the follow
  up fix to 6.12.y. ]
Signed-off-by: Alva Lan <alvalan9@foxmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 block/bio.c |   11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

--- a/block/bio.c
+++ b/block/bio.c
@@ -1156,9 +1156,10 @@ EXPORT_SYMBOL(bio_add_page);
 void bio_add_folio_nofail(struct bio *bio, struct folio *folio, size_t len,
 			  size_t off)
 {
+	unsigned long nr = off / PAGE_SIZE;
+
 	WARN_ON_ONCE(len > UINT_MAX);
-	WARN_ON_ONCE(off > UINT_MAX);
-	__bio_add_page(bio, &folio->page, len, off);
+	__bio_add_page(bio, folio_page(folio, nr), len, off % PAGE_SIZE);
 }
 EXPORT_SYMBOL_GPL(bio_add_folio_nofail);
 
@@ -1179,9 +1180,11 @@ EXPORT_SYMBOL_GPL(bio_add_folio_nofail);
 bool bio_add_folio(struct bio *bio, struct folio *folio, size_t len,
 		   size_t off)
 {
-	if (len > UINT_MAX || off > UINT_MAX)
+	unsigned long nr = off / PAGE_SIZE;
+
+	if (len > UINT_MAX)
 		return false;
-	return bio_add_page(bio, &folio->page, len, off) > 0;
+	return bio_add_page(bio, folio_page(folio, nr), len, off % PAGE_SIZE) > 0;
 }
 EXPORT_SYMBOL(bio_add_folio);