Commit 8cc95356 authored Apr 04, 2016 by Dave Jones Committed by Greg Kroah-Hartman Sep 16, 2019

af_packet: tone down the Tx-ring unsupported spew.



[ Upstream commit 6ae81ced378820c4c6434b1dedba14a7122df310 ]

Trinity and other fuzzers can hit this WARN on far too easily,
resulting in a tainted kernel that hinders automated fuzzing.

Replace it with a rate-limited printk.

Signed-off-by: Dave Jones <davej@codemonkey.org.uk>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 52b0d2ee

net/packet/af_packet.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -4176,7 +4176,7 @@ static int packet_set_ring(struct sock sk, union tpacket_req_u req_u,

		/* Opening a Tx-ring is NOT supported in TPACKET_V3 */
		if (!closing && tx_ring && (po->tp_version > TPACKET_V2)) {
		WARN(1, "Tx-ring is not supported.\n");
		net_warn_ratelimited("Tx-ring is not supported.\n");
		goto out;
		}