Commit efeb9e60 authored by Miklos Szeredi's avatar Miklos Szeredi
Browse files

fuse: readdir: check for slash in names 



Userspace can add names containing a slash character to the directory
listing.  Don't allow this as it could cause all sorts of trouble.

Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
Cc: stable@vger.kernel.org
parent 06a7c3c2

fs/fuse/dir.c

+4 −0
Original line number Diff line number Diff line
@@ -1174,6 +1174,8 @@ static int parse_dirfile(char *buf, size_t nbytes, struct file *file, 
			return -EIO;

		if (reclen > nbytes)

			break;

		if (memchr(dirent->name, '/', dirent->namelen) != NULL)

			return -EIO;



		if (!dir_emit(ctx, dirent->name, dirent->namelen,

			       dirent->ino, dirent->type))
@@ -1320,6 +1322,8 @@ static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file, 
			return -EIO;

		if (reclen > nbytes)

			break;

		if (memchr(dirent->name, '/', dirent->namelen) != NULL)

			return -EIO;



		if (!over) {

			/* We fill entries into dstbuf only as much as