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Commit 21d8a15a authored by Al Viro's avatar Al Viro
Browse files

lookup_one_len: don't accept . and .. 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 0903a0c8

fs/namei.c

+5 −0
Original line number Diff line number Diff line
@@ -2131,6 +2131,11 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len) 
	if (!len)

		return ERR_PTR(-EACCES);



	if (unlikely(name[0] == '.')) {

		if (len < 2 || (len == 2 && name[1] == '.'))

			return ERR_PTR(-EACCES);

	}



	while (len--) {

		c = *(const unsigned char *)name++;

		if (c == '/' || c == '\0')