Commit 0979ff79 authored Apr 04, 2019 by Daniel T. Lee Committed by Daniel Borkmann Apr 04, 2019

selftests/bpf: ksym_search won't check symbols exists



Currently, ksym_search located at trace_helpers won't check symbols are
existing or not.

In ksym_search, when symbol is not found, it will return &syms[0](_stext).
But when the kernel symbols are not loaded, it will return NULL, which is
not a desired action.

This commit will add verification logic whether symbols are loaded prior
to the symbol search.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

parent cc441a69

tools/testing/selftests/bpf/trace_helpers.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -52,6 +52,10 @@ struct ksym *ksym_search(long key)
		int start = 0, end = sym_cnt;
		int result;

		/* kallsyms not loaded. return NULL */
		if (sym_cnt <= 0)
		return NULL;

		while (start < end) {
		size_t mid = start + (end - start) / 2;

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