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

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I can't see that we check prog_cnt to ensure it doesn't go over
MAX_PROGS.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Dan Carpenter
2018-07-13 18:11:39 +03:00
committed by Alexei Starovoitov
parent 301f935be9
commit b0294bc1ad
1 changed files with 3 additions and 0 deletions
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samples/bpf/bpf_load.c
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@@ -107,6 +107,9 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
return -1; return -1;
} }
if (prog_cnt == MAX_PROGS)
return -1;
fd = bpf_load_program(prog_type, prog, insns_cnt, license, kern_version, fd = bpf_load_program(prog_type, prog, insns_cnt, license, kern_version,
bpf_log_buf, BPF_LOG_BUF_SIZE); bpf_log_buf, BPF_LOG_BUF_SIZE);
if (fd < 0) { if (fd < 0) {