connectat(2): do not enable EMPTYPATH for AT_FDCWD

This restores existing error code for connect(2) over unix domain socket
when the empty string is specified as socket address.

Reported by:	eduardo
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D57509

This commit is contained in:

Konstantin Belousov

2026-06-09 08:27:49 +03:00

parent 6bd97b5f37

commit a248c5545f

1 changed files with 3 additions and 2 deletions

									
										sys/kern/uipc_usrreq.c
									
		+3
		-2
	
												View File
												
				@@ -2921,8 +2921,9 @@ unp_connectat(int fd, struct socket *so, struct sockaddr *nam,

						sa = malloc(sizeof(struct sockaddr_un), M_SONAME, M_WAITOK);

					else

						sa = NULL;

					NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | EMPTYPATH,

					    UIO_SYSSPACE, buf, fd, cap_rights_init_one(&rights, CAP_CONNECTAT));

					NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF |

					    (fd == AT_FDCWD ? 0 : EMPTYPATH), UIO_SYSSPACE, buf, fd,

					    cap_rights_init_one(&rights, CAP_CONNECTAT));

					error = namei(&nd);

					if (error)

						vp = NULL;