igb: set max size RX buffer when store bad packet is enabled

jira VULN-6698
cve CVE-2023-45871
commit-author Radoslaw Tyl <radoslawx.tyl@intel.com>
commit bb5ed01

Increase the RX buffer size to 3K when the SBP bit is on. The size of
the RX buffer determines the number of pages allocated which may not
be sufficient for receive frames larger than the set MTU size.

	Cc: stable@vger.kernel.org
Fixes: 89eaefb ("igb: Support RX-ALL feature flag.")
	Reported-by: Manfred Rudigier <manfred.rudigier@omicronenergy.com>
	Signed-off-by: Radoslaw Tyl <radoslawx.tyl@intel.com>
	Tested-by: Arpana Arland <arpanax.arland@intel.com> (A Contingent worker at Intel)
	Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
	Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit bb5ed01)
	Signed-off-by: Marcin Wcisło <marcin.wcislo@conclusive.pl>

Author: pvts-mat

drivers/net/ethernet/intel/igb/igb_main.c

@@ -4731,6 +4731,10 @@ void igb_configure_rx_ring(struct igb_adapter *adapter,
 static void igb_set_rx_buffer_len(struct igb_adapter *adapter,
 				  struct igb_ring *rx_ring)
 {
+#if (PAGE_SIZE < 8192)
+	struct e1000_hw *hw = &adapter->hw;
+#endif
+
 	/* set build_skb and buffer size flags */
 	clear_ring_build_skb_enabled(rx_ring);
 	clear_ring_uses_large_buffer(rx_ring);
@@ -4741,10 +4745,9 @@ static void igb_set_rx_buffer_len(struct igb_adapter *adapter,
 	set_ring_build_skb_enabled(rx_ring);
 
 #if (PAGE_SIZE < 8192)
-	if (adapter->max_frame_size <= IGB_MAX_FRAME_BUILD_SKB)
-		return;
-
-	set_ring_uses_large_buffer(rx_ring);
+	if (adapter->max_frame_size > IGB_MAX_FRAME_BUILD_SKB ||
+	    rd32(E1000_RCTL) & E1000_RCTL_SBP)
+		set_ring_uses_large_buffer(rx_ring);
 #endif
 }