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tests: test for setns() EINVAL regression

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Verify that setns() reports EINVAL when an fd is passed that refers to an
open file but the file is not a file descriptor useable to interact with
namespaces.

Cc: Jan Stancek <jstancek@redhat.com>
Cc: Cyril Hrubis <chrubis@suse.cz>
Link: https://lore.kernel.org/lkml/20200615085836.GR12456@shao2-debian
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2020-06-17 00:48:54 +02:00
parent e571d4ee33
commit 86f56395fe
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
3 changed files with 17 additions and 5 deletions
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5
tools/testing/selftests/pidfd/pidfd.h
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@ -95,4 +95,9 @@ static inline int sys_pidfd_getfd(int pidfd, int fd, int flags)
return syscall(__NR_pidfd_getfd, pidfd, fd, flags);
}
static inline int sys_memfd_create(const char *name, unsigned int flags)
{
return syscall(__NR_memfd_create, name, flags);
}
#endif /* __PIDFD_H */

5
tools/testing/selftests/pidfd/pidfd_getfd_test.c
View File

@ -34,11 +34,6 @@ static int sys_kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1,
return syscall(__NR_kcmp, pid1, pid2, type, idx1, idx2);
}
static int sys_memfd_create(const char *name, unsigned int flags)
{
return syscall(__NR_memfd_create, name, flags);
}
static int __child(int sk, int memfd)
{
int ret;

12
tools/testing/selftests/pidfd/pidfd_setns_test.c
View File

@ -470,4 +470,16 @@ TEST_F(current_nsset, no_foul_play)
}
}
TEST(setns_einval)
{
int fd;
fd = sys_memfd_create("rostock", 0);
EXPECT_GT(fd, 0);
ASSERT_NE(setns(fd, 0), 0);
EXPECT_EQ(errno, EINVAL);
close(fd);
}
TEST_HARNESS_MAIN