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With trusted args now being the default, the NULL pointer check runs before type-specific validation. Update test3 to expect the new error message "Possibly NULL pointer passed to trusted arg0" instead of the old dynptr-specific error message. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com> Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Link: https://lore.kernel.org/r/20260102180038.2708325-7-puranjay@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
44 lines
874 B
C
44 lines
874 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2024 Meta Platforms, Inc */
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#include "bpf_kfuncs.h"
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#include "../test_kmods/bpf_testmod_kfunc.h"
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SEC("tc")
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int kfunc_dynptr_nullable_test1(struct __sk_buff *skb)
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{
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struct bpf_dynptr data;
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bpf_dynptr_from_skb(skb, 0, &data);
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bpf_kfunc_dynptr_test(&data, NULL);
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return 0;
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}
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SEC("tc")
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int kfunc_dynptr_nullable_test2(struct __sk_buff *skb)
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{
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struct bpf_dynptr data;
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bpf_dynptr_from_skb(skb, 0, &data);
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bpf_kfunc_dynptr_test(&data, &data);
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return 0;
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}
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SEC("tc")
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__failure __msg("Possibly NULL pointer passed to trusted arg0")
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int kfunc_dynptr_nullable_test3(struct __sk_buff *skb)
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{
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struct bpf_dynptr data;
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bpf_dynptr_from_skb(skb, 0, &data);
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bpf_kfunc_dynptr_test(NULL, &data);
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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