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| author | Eric Dumazet <edumazet@google.com> | 2020-01-13 09:27:11 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-23 08:21:35 +0100 |
| commit | 6dc2025f3cd9fd65986e0cdf9705a653e05ad486 (patch) | |
| tree | 1ae4d08e34e671fb2d3290de15e5b45586ed22b5 | |
| parent | 11235a3d7bfcb19a1bb60092e282d8da5567f30f (diff) | |
| download | linux-stable-6dc2025f3cd9fd65986e0cdf9705a653e05ad486.tar.gz linux-stable-6dc2025f3cd9fd65986e0cdf9705a653e05ad486.tar.bz2 linux-stable-6dc2025f3cd9fd65986e0cdf9705a653e05ad486.zip | |
net: usb: lan78xx: limit size of local TSO packets
[ Upstream commit f8d7408a4d7f60f8b2df0f81decdc882dd9c20dc ]
lan78xx_tx_bh() makes sure to not exceed MAX_SINGLE_PACKET_SIZE
bytes in the aggregated packets it builds, but does
nothing to prevent large GSO packets being submitted.
Pierre-Francois reported various hangs when/if TSO is enabled.
For localy generated packets, we can use netif_set_gso_max_size()
to limit the size of TSO packets.
Note that forwarded packets could still hit the issue,
so a complete fix might require implementing .ndo_features_check
for this driver, forcing a software segmentation if the size
of the TSO packet exceeds MAX_SINGLE_PACKET_SIZE.
Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: RENARD Pierre-Francois <pfrenard@gmail.com>
Tested-by: RENARD Pierre-Francois <pfrenard@gmail.com>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Woojung Huh <woojung.huh@microchip.com>
Cc: Microchip Linux Driver Support <UNGLinuxDriver@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/usb/lan78xx.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index 42715520c070..7d708aeb4576 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -3769,6 +3769,7 @@ static int lan78xx_probe(struct usb_interface *intf, /* MTU range: 68 - 9000 */ netdev->max_mtu = MAX_SINGLE_PACKET_SIZE; + netif_set_gso_max_size(netdev, MAX_SINGLE_PACKET_SIZE - MAX_HEADER); dev->ep_blkin = (intf->cur_altsetting)->endpoint + 0; dev->ep_blkout = (intf->cur_altsetting)->endpoint + 1; |