On Fri, Apr 14, 2023 at 02:28:01AM +0000, jeffxu@xxxxxxxxxxxx wrote: > From: Jeff Xu <jeffxu@xxxxxxxxxx> > > sysctl memfd_noexec is pid-namespaced, non-reservable, > and inherent to the child process. > Moving the inherence test from init ns to child ns, so > init ns can keep the default value. > > Signed-off-by: Jeff Xu <jeffxu@xxxxxxxxxx> > Reported-by: kernel test robot <yujie.liu@xxxxxxxxx> > Link: https://lore.kernel.org/oe-lkp/202303312259.441e35db-yujie.liu@xxxxxxxxx The reported issue is gone after applying this patch. Thanks. Tested-by: Yujie Liu <yujie.liu@xxxxxxxxx> ========================================================================================= compiler/group/kconfig/rootfs/tbox_group/testcase: gcc-11/group-02/x86_64-rhel-8.3-kselftests/debian-12-x86_64-20220629.cgz/lkp-skl-d06/kernel-selftests commit: c4f75bc8bd6b3 ("mm/memfd: add write seals when apply SEAL_EXEC to executable memfd") 11f75a01448f1 ("selftests/memfd: add tests for MFD_NOEXEC_SEAL MFD_EXEC") 395874d592d77 ("selftests/memfd: fix test_sysctl") c4f75bc8bd6b3d62 11f75a01448f1b7a739e75dbd8f 395874d592d775d999d18ef9cae ---------------- --------------------------- --------------------------- fail:runs %reproduction fail:runs %reproduction fail:runs | | | | | :6 233% 14:20 0% :5 kernel-selftests.memfd.run_fuse_test.sh.fail > --- > tools/testing/selftests/memfd/memfd_test.c | 14 ++++++++------ > 1 file changed, 8 insertions(+), 6 deletions(-) > > diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c > index ae71f15f790d..dba0e8ba002f 100644 > --- a/tools/testing/selftests/memfd/memfd_test.c > +++ b/tools/testing/selftests/memfd/memfd_test.c > @@ -43,6 +43,9 @@ > */ > static size_t mfd_def_size = MFD_DEF_SIZE; > static const char *memfd_str = MEMFD_STR; > +static pid_t spawn_newpid_thread(unsigned int flags, int (*fn)(void *)); > +static int newpid_thread_fn2(void *arg); > +static void join_newpid_thread(pid_t pid); > > static ssize_t fd2name(int fd, char *buf, size_t bufsize) > { > @@ -1111,6 +1114,7 @@ static void test_noexec_seal(void) > static void test_sysctl_child(void) > { > int fd; > + int pid; > > printf("%s sysctl 0\n", memfd_str); > sysctl_assert_write("0"); > @@ -1129,6 +1133,10 @@ static void test_sysctl_child(void) > mfd_def_size, > MFD_CLOEXEC | MFD_ALLOW_SEALING); > > + printf("%s child ns\n", memfd_str); > + pid = spawn_newpid_thread(CLONE_NEWPID, newpid_thread_fn2); > + join_newpid_thread(pid); > + > mfd_assert_mode(fd, 0666); > mfd_assert_has_seals(fd, F_SEAL_EXEC); > mfd_fail_chmod(fd, 0777); > @@ -1206,12 +1214,6 @@ static void test_sysctl(void) > int pid = spawn_newpid_thread(CLONE_NEWPID, newpid_thread_fn); > > join_newpid_thread(pid); > - > - printf("%s child ns\n", memfd_str); > - sysctl_assert_write("1"); > - > - pid = spawn_newpid_thread(CLONE_NEWPID, newpid_thread_fn2); > - join_newpid_thread(pid); > } > > /* > -- > 2.40.0.577.gac1e443424-goog >
