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Use scoped_with_init_fs() to temporarily override current->fs for the bdev_file_open_by_path() call so the path lookup happens in init's filesystem context. process_msg_open() ← rnbd_srv_rdma_ev() ← RDMA completion callback ← ib_cq_poll_work() ← kworker (InfiniBand completion workqueue) Link: https://patch.msgid.link/20260601-work-kthread-nullfs-v4-6-77ee053060e0@kernel.org Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>