[PATCH net-next v4 15/17] net: pktgen: num_arg error out in case no valid character is parsed

In num_arg() error out in case no valid character is parsed.

Signed-off-by: Peter Seiderer ps.report@gmx.net --- Changes v3 -> v4 - new patch (factored out of patch 'net: pktgen: fix access outside of user given buffer in pktgen_if_write()') --- net/core/pktgen.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/net/core/pktgen.c b/net/core/pktgen.c index cb3b732fd0a3..a46eb20edf6c 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -821,6 +821,9 @@ static long num_arg(const char __user *user_buffer, unsigned long maxlen, if ((c >= '0') && (c <= '9')) { *num *= 10; *num += c - '0'; + } else if (i == 0) { + /* no valid character parsed, error out */ + return -EINVAL; } else break; }