This series fixes a bug where request_module() was reporting success to kernel code when module autoloading had been completely disabled via 'echo > /proc/sys/kernel/modprobe'. It also addresses the issues raised on the original thread (https://lkml.kernel.org/lkml/20200310223731.126894-1-ebiggers@xxxxxxxxxx/T/#u) by documenting the modprobe sysctl, adding a self-test for the empty path case, and downgrading a user-reachable WARN_ONCE(). Changed since v3: - Added Fixes tag to the fs/filesystems.c patch, and mentioned why the warning is continued to be printed once only. Changed since v2: - Adjusted the new documentation to avoid implicitly bringing up module aliases, which are a more complex topic. - Split the selftest patch into two patches, one to fix the test numbering bug and one to add the new tests. Changed since v1: - Added patches to address the other issues raised on the thread. Eric Biggers (5): kmod: make request_module() return an error when autoloading is disabled fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once() docs: admin-guide: document the kernel.modprobe sysctl selftests: kmod: fix handling test numbers above 9 selftests: kmod: test disabling module autoloading Documentation/admin-guide/sysctl/kernel.rst | 25 +++++++++++- fs/filesystems.c | 4 +- kernel/kmod.c | 4 +- tools/testing/selftests/kmod/kmod.sh | 43 +++++++++++++++++++-- 4 files changed, 68 insertions(+), 8 deletions(-) base-commit: 5076190daded2197f62fe92cf69674488be44175 -- 2.25.1
