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[bpf-next,v3,08/11] bpf: fix cbpf parser bug for octal numbers

Message ID 20180602210641.6163-9-daniel@iogearbox.net
State Accepted, archived
Delegated to: BPF Maintainers
Headers show
Series Misc BPF improvements | expand

Commit Message

Daniel Borkmann June 2, 2018, 9:06 p.m. UTC 
Range is 0-7, not 0-9, otherwise parser silently excludes it from the
strtol() rather than throwing an error.

Reported-by: Marc Boschma <marc@boschma.cx>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
---
 tools/bpf/bpf_exp.l | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

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;
 		}