From 994e2419f1e77724479f0ffd5ad4eeae060dec95 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 6 May 2023 10:16:19 -0700 Subject: [PATCH] nfs: fix mis-merged __filemap_get_folio() error check Fix another case of an incorrect check for the returned 'folio' value from __filemap_get_folio(). The failure case used to return NULL, but was changed by commit 66dabbb65d67 ("mm: return an ERR_PTR from __filemap_get_folio"). But in the meantime, commit ec108d3cc766 ("NFS: Convert readdir page array functions to use a folio") added a new user of that function. And my merge of the two did not fix this up correctly. The ext4 merge had the same issue, but that one had been caught in linux-next and got properly fixed while merging. Fixes: 0127f25b5dfc ("Merge tag 'nfs-for-6.4-1' of git://git.linux-nfs.org/projects/anna/linux-nfs") Cc: Anna Schumaker Cc: Matthew Wilcox Cc: Christoph Hellwig Signed-off-by: Linus Torvalds --- fs/nfs/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 8257de6dba45..bacad0c57810 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -448,7 +448,7 @@ static struct folio *nfs_readdir_folio_get_next(struct address_space *mapping, folio = __filemap_get_folio(mapping, index, FGP_LOCK|FGP_CREAT|FGP_NOFS|FGP_NOWAIT, mapping_gfp_mask(mapping)); - if (!folio) + if (IS_ERR(folio)) return NULL; nfs_readdir_folio_init_and_validate(folio, cookie, change_attr); if (nfs_readdir_folio_last_cookie(folio) != cookie) -- 2.34.1