6.5-stable review patch. If anyone has any objections, please let me know.
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From: Ritesh Harjani (IBM) ritesh.list@gmail.com
[ Upstream commit eee2d2e6ea5550118170dbd5bb1316ceb38455fb ]
folio_next_index() returns an unsigned long value which left shifted by PAGE_SHIFT could possibly cause an overflow on 32-bit system. Instead use folio_pos(folio) + folio_size(folio), which does this correctly.
Suggested-by: Matthew Wilcox willy@infradead.org Signed-off-by: Ritesh Harjani (IBM) ritesh.list@gmail.com Reviewed-by: Darrick J. Wong djwong@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/iomap/buffered-io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 7d2f70708f37d..794fda5bd9bc6 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -927,7 +927,7 @@ static int iomap_write_delalloc_scan(struct inode *inode, * the end of this data range, not the end of the folio. */ *punch_start_byte = min_t(loff_t, end_byte, - folio_next_index(folio) << PAGE_SHIFT); + folio_pos(folio) + folio_size(folio)); }
/* move offset to start of next folio in range */