[PATCH bpf-next 08/11] bpf: fix cbpf parser bug for octal numbers
From: Daniel Borkmann <daniel@iogearbox.net>
Date: 2018-05-28 00:44:07
Subsystem:
bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
Range is 0-7, not 0-9, otherwise parser silently excludes it from the strtol() rather than throwing an error. Reported-by: Marc Boschma <redacted> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> --- tools/bpf/bpf_exp.l | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/bpf/bpf_exp.l b/tools/bpf/bpf_exp.l
index bd83149..4da8d05 100644
--- a/tools/bpf/bpf_exp.l
+++ b/tools/bpf/bpf_exp.l@@ -175,7 +175,7 @@ extern void yyerror(const char *str); yylval.number = strtol(yytext, NULL, 10); return number; } -([0][0-9]+) { +([0][0-7]+) { yylval.number = strtol(yytext + 1, NULL, 8); return number; }
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2.9.5