35 lines
610 B
C
35 lines
610 B
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <stddef.h>
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#if !defined(__clang__)
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#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
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#endif
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struct Small {
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long x;
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};
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struct Big {
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long x;
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long y;
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};
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__noinline int foo(const struct Big *big)
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{
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if (!big)
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return 0;
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return bpf_get_prandom_u32() < big->y;
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}
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SEC("cgroup_skb/ingress")
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__failure __msg("invalid indirect access to stack")
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int global_func10(struct __sk_buff *skb)
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{
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const struct Small small = {.x = skb->len };
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return foo((struct Big *)&small) ? 1 : 0;
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}
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