From dbfc9e9878561da92cdcda41f321137c16966587 Mon Sep 17 00:00:00 2001 From: Petr Malat Date: Fri, 13 Mar 2020 21:24:43 +0100 Subject: NFS: Remove superfluous kmap in nfs_readdir_xdr_to_array Array is mapped by nfs_readdir_get_array(), the further kmap is a result of a bad merge and should be removed. This resource leakage can be exploited for DoS by receptively reading a content of a directory on NFS (e.g. by running ls). Fixes: 67a56e9743171 ("NFS: Fix memory leaks and corruption in readdir") Signed-off-by: Petr Malat Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- fs/nfs/dir.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'fs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index c2665d920cf8..2517fcd423b6 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -678,8 +678,6 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, goto out_label_free; } - array = kmap(page); - status = nfs_readdir_alloc_pages(pages, array_size); if (status < 0) goto out_release_array; -- cgit v1.2.3