selftests/move_mount_set_group: check that an unbindable target is refused

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MOVE_MOUNT_SET_GROUP must not accept an unbindable mount as the target.
Cover both sources:

- a slave, which used to leave the target unbindable and a slave at once

- a shared mount, which used to silently drop the unbindable flag

Check that the target is untouched after the refused call.

Link: https://patch.msgid.link/20260923-work-mount-fixes-v1-4-f424cf8d3242@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

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Christian Brauner 2026-09-23 14:27:56 +02:00

parent a2b42babc9

commit 7541865c26

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tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c

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