samples: bpf: ensure that we don't load over MAX_PROGS programs

I can't see that we check prog_cnt to ensure it doesn't go over MAX_PROGS. Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
soumdtt · Jul 16, 2018 · b0294bc · b0294bc
1 parent 301f935
commit b0294bc
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
@@ -107,6 +107,9 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
 		return -1;
 	}
 
+	if (prog_cnt == MAX_PROGS)
+		return -1;
+
 	fd = bpf_load_program(prog_type, prog, insns_cnt, license, kern_version,
 			      bpf_log_buf, BPF_LOG_BUF_SIZE);
 	if (fd < 0) {