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| author | Colin Ian King <colin.king@canonical.com> | 2016-05-05 23:39:33 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-08 23:32:59 -0400 |
| commit | 25a54342fde903b6abc2680594cf3e4864686339 (patch) | |
| tree | 89be78b0f2e402ca1932aac7155ecea580f4560b /tools | |
| parent | 810810ffb2f6d46365d0790bbe77698a5534393a (diff) | |
| download | lwn-25a54342fde903b6abc2680594cf3e4864686339.tar.gz lwn-25a54342fde903b6abc2680594cf3e4864686339.zip | |
tools: bpf_jit_disasm: check for klogctl failure
klogctl can fail and return -ve len, so check for this and
return NULL to avoid passing a (size_t)-1 to malloc.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/net/bpf_jit_disasm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/net/bpf_jit_disasm.c b/tools/net/bpf_jit_disasm.c index 5b3241340945..544b05a53b70 100644 --- a/tools/net/bpf_jit_disasm.c +++ b/tools/net/bpf_jit_disasm.c @@ -98,6 +98,9 @@ static char *get_klog_buff(unsigned int *klen) char *buff; len = klogctl(CMD_ACTION_SIZE_BUFFER, NULL, 0); + if (len < 0) + return NULL; + buff = malloc(len); if (!buff) return NULL; |