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Subject[PATCH 4.4 8/9] af_packet: tone down the Tx-ring unsupported spew.
Date
[ 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>
---
net/packet/af_packet.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 5d8988185c591..0dd9fc3f57e87 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -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;
}

--
2.20.1


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