git: a248c5545f6f - main - connectat(2): do not enable EMPTYPATH for AT_FDCWD

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=a248c5545f6fb861ea4200b69a58b2abcf815ce4

commit a248c5545f6fb861ea4200b69a58b2abcf815ce4
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2026-06-09 05:27:49 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2026-06-09 21:09:48 +0000

    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
---
 sys/kern/uipc_usrreq.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sys/kern/uipc_usrreq.c b/sys/kern/uipc_usrreq.c
index 920588627914..b28aed291895 100644
--- a/sys/kern/uipc_usrreq.c
+++ b/sys/kern/uipc_usrreq.c
@@ -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;