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D31970.1793877030.diff
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diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c
--- a/sys/kern/vfs_vnops.c
+++ b/sys/kern/vfs_vnops.c
@@ -399,13 +399,13 @@
if ((fmode & O_PATH) == 0 || (fmode & FEXEC) != 0)
return (EMLINK);
}
- if (vp->v_type == VSOCK)
- return (EOPNOTSUPP);
if (vp->v_type != VDIR && fmode & O_DIRECTORY)
return (ENOTDIR);
accmode = 0;
if ((fmode & O_PATH) == 0) {
+ if (vp->v_type == VSOCK)
+ return (EOPNOTSUPP);
if ((fmode & (FWRITE | O_TRUNC)) != 0) {
if (vp->v_type == VDIR)
return (EISDIR);
@@ -437,11 +437,8 @@
return (error);
}
if ((fmode & O_PATH) != 0) {
- if (vp->v_type == VFIFO)
- error = EPIPE;
- else
- error = VOP_ACCESS(vp, VREAD, cred, td);
- if (error == 0)
+ if (vp->v_type != VFIFO && vp->v_type != VSOCK &&
+ VOP_ACCESS(vp, VREAD, cred, td) == 0)
fp->f_flag |= FKQALLOWED;
return (0);
}
diff --git a/tests/sys/file/path_test.c b/tests/sys/file/path_test.c
--- a/tests/sys/file/path_test.c
+++ b/tests/sys/file/path_test.c
@@ -845,13 +845,15 @@
CHECKED_CLOSE(sd[1]);
}
-/* Verify that a local socket can't be opened with O_PATH. */
+/* Verify that a local socket can be opened with O_PATH. */
ATF_TC_WITHOUT_HEAD(path_unix);
ATF_TC_BODY(path_unix, tc)
{
- char path[PATH_MAX];
+ char buf[BUFSIZ], path[PATH_MAX];
+ struct kevent ev;
struct sockaddr_un sun;
- int pathfd, sd;
+ struct stat sb;
+ int kq, pathfd, sd;
snprintf(path, sizeof(path), "path_unix.XXXXXX");
ATF_REQUIRE_MSG(mktemp(path) == path, FMT_ERR("mktemp"));
@@ -866,9 +868,31 @@
FMT_ERR("bind"));
pathfd = open(path, O_PATH);
- ATF_REQUIRE_ERRNO(EOPNOTSUPP, pathfd < 0);
+ ATF_REQUIRE_MSG(pathfd >= 0, FMT_ERR("open"));
+
+ ATF_REQUIRE_MSG(fstatat(pathfd, "", &sb, AT_EMPTY_PATH) == 0,
+ FMT_ERR("fstatat"));
+ ATF_REQUIRE_MSG(sb.st_mode & S_IFSOCK, "socket mode %#x", sb.st_mode);
+ ATF_REQUIRE_MSG(sb.st_ino != 0, "socket has inode number 0");
+
+ memset(buf, 0, sizeof(buf));
+ ATF_REQUIRE_ERRNO(EBADF, write(pathfd, buf, sizeof(buf)));
+ ATF_REQUIRE_ERRNO(EBADF, read(pathfd, buf, sizeof(buf)));
+
+ /* kevent() is disallowed with sockets. */
+ kq = kqueue();
+ ATF_REQUIRE_MSG(kq >= 0, FMT_ERR("kqueue"));
+ EV_SET(&ev, pathfd, EVFILT_READ, EV_ADD | EV_ENABLE, 0, 0, 0);
+ ATF_REQUIRE_ERRNO(EBADF, kevent(kq, &ev, 1, NULL, 0, NULL) == -1);
+
+ /* Should not be able to open a socket without O_PATH. */
+ ATF_REQUIRE_ERRNO(EOPNOTSUPP, openat(pathfd, "", O_EMPTY_PATH) == -1);
+
+ ATF_REQUIRE_MSG(funlinkat(AT_FDCWD, path, pathfd, 0) == 0,
+ FMT_ERR("funlinkat"));
CHECKED_CLOSE(sd);
+ CHECKED_CLOSE(pathfd);
}
ATF_TP_ADD_TCS(tp)

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