selftests/bpf: Add test case for element reuse in htab map

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The reinitialization of spin-lock in map value after immediate reuse may
corrupt lookup with BPF_F_LOCK flag and result in hard lock-up, so add
one test case to demonstrate the problem.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20230215082132.3856544-3-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Hou Tao 2023-02-15 16:21:32 +08:00 • committed by Alexei Starovoitov

parent 997849c4b9

commit f88da2d46c

2 changed files with 120 additions and 0 deletions

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101

tools/testing/selftests/bpf/prog_tests/htab_reuse.c

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19

tools/testing/selftests/bpf/progs/htab_reuse.c

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