Hou Tao e3dd408285 selftests/bpf: Test outer map update operations in syscall program ...

Syscall program is running with rcu_read_lock_trace being held, so if
bpf_map_update_elem() or bpf_map_delete_elem() invokes
synchronize_rcu_tasks_trace() when operating on an outer map, there will
be dead-lock, so add a test to guarantee that it is dead-lock free.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20231204140425.1480317-8-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

2023-12-04 17:50:27 -08:00

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