git: eea4a0b81aed - stable/13 - vn_open_cred(): disallow O_CREAT | O_EMPTY_PATH

[Konstantin Belousov]

The branch stable/13 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=eea4a0b81aedfdbb80245e779c92a74131c572aa

commit eea4a0b81aedfdbb80245e779c92a74131c572aa
Author:     Konstantin Belousov <kib at FreeBSD.org>
AuthorDate: 2021-05-12 19:04:44 +0000
Commit:     Konstantin Belousov <kib at FreeBSD.org>
CommitDate: 2021-05-19 03:13:15 +0000

    vn_open_cred(): disallow O_CREAT | O_EMPTY_PATH
    
    (cherry picked from commit 6de3cf14c47d97b423ae25d5bd1d80b896ecd9e6)
---
 sys/kern/vfs_vnops.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c
index 670bc4bf8fcc..8f583329f067 100644
--- a/sys/kern/vfs_vnops.c
+++ b/sys/kern/vfs_vnops.c
@@ -233,7 +233,8 @@ restart:
 	first_open = false;
 	fmode = *flagp;
 	if ((fmode & (O_CREAT | O_EXCL | O_DIRECTORY)) == (O_CREAT |
-	    O_EXCL | O_DIRECTORY))
+	    O_EXCL | O_DIRECTORY) ||
+	    (fmode & (O_CREAT | O_EMPTY_PATH)) == (O_CREAT | O_EMPTY_PATH))
 		return (EINVAL);
 	else if ((fmode & (O_CREAT | O_DIRECTORY)) == O_CREAT) {
 		ndp->ni_cnd.cn_nameiop = CREATE;