f88da2d46c
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>
19 lines
445 B
C
19 lines
445 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2023. Huawei Technologies Co., Ltd */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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char _license[] SEC("license") = "GPL";
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struct htab_val {
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struct bpf_spin_lock lock;
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unsigned int data;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__uint(max_entries, 64);
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__type(key, unsigned int);
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__type(value, struct htab_val);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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} htab SEC(".maps");
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