mirror of
https://github.com/torvalds/linux
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8b08807d03
test_global_func9 - check valid pointer's scenarios
test_global_func10 - check that a smaller type cannot be passed as a
larger one
test_global_func11 - check that CTX pointer cannot be passed
test_global_func12 - check access to a null pointer
test_global_func13 - check access to an arbitrary pointer value
test_global_func14 - check that an opaque pointer cannot be passed
test_global_func15 - check that a variable has an unknown value after
it was passed to a global function by pointer
test_global_func16 - check access to uninitialized stack memory
test_global_func_args - check read and write operations through a pointer
Signed-off-by: Dmitrii Banshchikov <me@ubique.spb.ru>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210212205642.620788-5-me@ubique.spb.ru
25 lines
375 B
C
25 lines
375 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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struct S {
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int x;
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};
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__noinline int foo(const struct S *s)
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{
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if (s)
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return bpf_get_prandom_u32() < s->x;
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return 0;
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}
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SEC("cgroup_skb/ingress")
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int test_cls(struct __sk_buff *skb)
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{
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const struct S *s = (const struct S *)(0xbedabeda);
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return foo(s);
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}
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