The folio returned from __filemap_get_folio may be a NULL, it will causes the kernel crash when access folio->page. Signed-off-by: Tuo Cao <91tuocao@xxxxxxxxx> --- mm/folio-compat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/folio-compat.c b/mm/folio-compat.c index e1e23b4947d7..37ba33135506 100644 --- a/mm/folio-compat.c +++ b/mm/folio-compat.c @@ -108,7 +108,7 @@ struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index, struct folio *folio; folio = __filemap_get_folio(mapping, index, fgp_flags, gfp); - if ((fgp_flags & FGP_HEAD) || !folio || xa_is_value(folio)) + if ((fgp_flags & FGP_HEAD) || xa_is_value(folio)) return &folio->page; return folio_file_page(folio, index); } -- 2.17.1
