tun: Fix csum_start with VLAN acceleration

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commit a8f9bfdf98 upstream.

When VLAN acceleration is in use on the xmit path, we end up
setting csum_start to the wrong place.  The result is that the
whoever ends up doing the checksum setting will corrupt the packet
instead of writing the checksum to the expected location, usually
this means writing the checksum with an offset of -4.

This patch fixes this by adjusting csum_start when VLAN acceleration
is detected.

Fixes: 6680ec68ef ("tuntap: hardware vlan tx support")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Herbert Xu 2014-11-03 04:30:13 +08:00 • committed by Luis Henriques

parent bcc79e2d75

commit e5d98eeeeb

1 changed files with 9 additions and 7 deletions

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drivers/net/tun.c

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