UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

selftests/seccomp: More closely track fds being assigned 

Since the open fds might not always start at "4" (especially when
running under kselftest, etc), start counting from the first assigned
fd, rather than using the more permissive EXPECT_GE(fd, 0).

Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/lkml/20210527032948.3730953-1-keescook@chromium.org
Reviewed-by: Rodrigo Campos <rodrigo@kinvolk.io>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Kees Cook 2021-05-26 19:49:15 -07:00
parent e540ad97e7
commit 93e720d710
1 changed files with 12 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
tools/testing/selftests/seccomp/seccomp_bpf.c
View File

@ -3954,7 +3954,7 @@ TEST(user_notification_addfd)
{
pid_t pid;
long ret;
int status, listener, memfd, fd;
int status, listener, memfd, fd, nextfd;
struct seccomp_notif_addfd addfd = {};
struct seccomp_notif_addfd_small small = {};
struct seccomp_notif_addfd_big big = {};
@ -3963,18 +3963,21 @@ TEST(user_notification_addfd)
/* 100 ms */
struct timespec delay = { .tv_nsec = 100000000 };
/* There may be arbitrary already-open fds at test start. */
memfd = memfd_create("test", 0);
ASSERT_GE(memfd, 0);
nextfd = memfd + 1;
ret = prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
ASSERT_EQ(0, ret) {
TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
}
/* fd: 4 */
/* Check that the basic notification machinery works */
listener = user_notif_syscall(__NR_getppid,
SECCOMP_FILTER_FLAG_NEW_LISTENER);
ASSERT_GE(listener, 0);
ASSERT_EQ(listener, nextfd++);
pid = fork();
ASSERT_GE(pid, 0);
@ -4029,14 +4032,14 @@ TEST(user_notification_addfd)
/* Verify we can set an arbitrary remote fd */
fd = ioctl(listener, SECCOMP_IOCTL_NOTIF_ADDFD, &addfd);
EXPECT_GE(fd, 0);
EXPECT_EQ(fd, nextfd++);
EXPECT_EQ(filecmp(getpid(), pid, memfd, fd), 0);
/* Verify we can set an arbitrary remote fd with large size */
memset(&big, 0x0, sizeof(big));
big.addfd = addfd;
fd = ioctl(listener, SECCOMP_IOCTL_NOTIF_ADDFD_BIG, &big);
EXPECT_GE(fd, 0);
EXPECT_EQ(fd, nextfd++);
/* Verify we can set a specific remote fd */
addfd.newfd = 42;
@ -4070,9 +4073,11 @@ TEST(user_notification_addfd)
addfd.newfd = 0;
addfd.flags = SECCOMP_ADDFD_FLAG_SEND;
fd = ioctl(listener, SECCOMP_IOCTL_NOTIF_ADDFD, &addfd);
/* Child has fds 0-6 and 42 used, we expect the lower fd available: 7 */
EXPECT_EQ(fd, 7);
/*
* Child has earlier "low" fds and now 42, so we expect the next
* lowest available fd to be assigned here.
*/
EXPECT_EQ(fd, nextfd++);
EXPECT_EQ(filecmp(getpid(), pid, memfd, fd), 0);
/*