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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-24 14:19:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-24 14:19:45 -0700 |
| commit | fbb58011fdd9ca2e2f0e329d11085ddf46830c5a (patch) | |
| tree | d7676fe1dccba822166a83ac9f693491ecbe6190 | |
| parent | 26e122e97a3d0390ebec389347f64f3730fdf48f (diff) | |
| parent | 86f56395feb2b106b125c47e72192e37da5dd088 (diff) | |
| download | linux-fbb58011fdd9ca2e2f0e329d11085ddf46830c5a.tar.gz | |
Merge tag 'for-linus-2020-06-24' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull thread fix from Christian Brauner:
"This fixes a regression introduced with 303cc571d107 ("nsproxy: attach
to namespaces via pidfds").
The LTP testsuite reported a regression where users would now see
EBADF returned instead of EINVAL when an fd was passed that referred
to an open file but the file was not a namespace file.
Fix this by continuing to report EINVAL and add a regression test"
* tag 'for-linus-2020-06-24' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
tests: test for setns() EINVAL regression
nsproxy: restore EINVAL for non-namespace file descriptor
| -rw-r--r-- | kernel/nsproxy.c | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/pidfd/pidfd.h | 5 | ||||
| -rw-r--r-- | tools/testing/selftests/pidfd/pidfd_getfd_test.c | 5 | ||||
| -rw-r--r-- | tools/testing/selftests/pidfd/pidfd_setns_test.c | 12 |
4 files changed, 18 insertions, 6 deletions
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c index b03df67621d01f..cd356630a311af 100644 --- a/kernel/nsproxy.c +++ b/kernel/nsproxy.c @@ -531,7 +531,7 @@ SYSCALL_DEFINE2(setns, int, fd, int, flags) } else if (!IS_ERR(pidfd_pid(file))) { err = check_setns_flags(flags); } else { - err = -EBADF; + err = -EINVAL; } if (err) goto out; diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h index c1921a53dbed38..8d728eda783df1 100644 --- a/tools/testing/selftests/pidfd/pidfd.h +++ b/tools/testing/selftests/pidfd/pidfd.h @@ -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 */ diff --git a/tools/testing/selftests/pidfd/pidfd_getfd_test.c b/tools/testing/selftests/pidfd/pidfd_getfd_test.c index 401a7c1d031292..84b65ecccb043c 100644 --- a/tools/testing/selftests/pidfd/pidfd_getfd_test.c +++ b/tools/testing/selftests/pidfd/pidfd_getfd_test.c @@ -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; diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c index 133ec5b6cda8b7..9418108eae137b 100644 --- a/tools/testing/selftests/pidfd/pidfd_setns_test.c +++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c @@ -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 |