e1000e: fix packet corruption and tx hang during NFSv2 (a80483d3) · Commits · 戴 / test

when receiving a particular type of NFS v2 UDP traffic, the hardware could DMA some bad data and then hang, possibly corrupting memory. Disable the NFS parsing in this hardware, verified to fix the bug. Originally reported and reproduced by RedHat's Neil Horman CC: nhorman@tuxdriver.com Signed-off-by:

Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by:

Jeff Kirsher <jeffrey.t.kirsher@intel.com> Acked-by:

Neil Horman <nhorman@tuxdriver.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

drivers/net/e1000e/defines.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -320,6 +320,8 @@
		#define E1000_RXCSUM_IPPCSE 0x00001000 /* IP payload checksum enable */

		/* Header split receive */
		#define E1000_RFCTL_NFSW_DIS 0x00000040
		#define E1000_RFCTL_NFSR_DIS 0x00000080
		#define E1000_RFCTL_ACK_DIS 0x00001000
		#define E1000_RFCTL_EXTEN 0x00008000
		#define E1000_RFCTL_IPV6_EX_DIS 0x00010000

drivers/net/e1000e/ich8lan.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -2740,6 +2740,16 @@ static void e1000_initialize_hw_bits_ich8lan(struct e1000_hw *hw)
		reg &= ~(1 << 31);
		ew32(STATUS, reg);
		}

		/*
		* work-around descriptor data corruption issue during nfs v2 udp
		* traffic, just disable the nfs filtering capability
		*/
		reg = er32(RFCTL);
		reg \|= (E1000_RFCTL_NFSW_DIS \| E1000_RFCTL_NFSR_DIS);
		ew32(RFCTL, reg);

		return;
		}

		/**

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