Commit 25a54342 authored May 05, 2016 by Colin Ian King Committed by David S. Miller May 08, 2016

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>

parent 810810ff

tools/net/bpf_jit_disasm.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;