From: Marco Nelissen <marco.nelissen@xxxxxxxxx> [ Upstream commit c13094b894de289514d84b8db56d1f2931a0bade ] on 32-bit kernels, iomap_write_delalloc_scan() was inadvertently using a 32-bit position due to folio_next_index() returning an unsigned long. This could lead to an infinite loop when writing to an xfs filesystem. Signed-off-by: Marco Nelissen <marco.nelissen@xxxxxxxxx> Link: https://lore.kernel.org/r/20250109041253.2494374-1-marco.nelissen@xxxxxxxxx Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 47f44b02c17d..70e246f7e8fe 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -907,7 +907,7 @@ static int iomap_write_delalloc_scan(struct inode *inode, } /* move offset to start of next folio in range */ - start_byte = folio_next_index(folio) << PAGE_SHIFT; + start_byte = folio_pos(folio) + folio_size(folio); folio_unlock(folio); folio_put(folio); } -- 2.39.5
