net: stmmac: use correct DMA buffer size in the RX descriptor

Browse source

We always program the maximum DMA buffer size into the receive descriptor,
although the allocated size may be less. E.g. with the default MTU size
we allocate only 1536 bytes. If somebody sends us a bigger frame, then
memory may get corrupted.

Fix by using exact buffer sizes.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Aaro Koskinen 2019-03-27 22:35:35 +02:00 • committed by David S. Miller

parent 288ac524cf

commit 583e636141

7 changed files with 35 additions and 19 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

22

drivers/net/ethernet/stmicro/stmmac/descs_com.h

View file

2

drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c

View file

2

drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c

View file

10

drivers/net/ethernet/stmicro/stmmac/enh_desc.c

View file

2

drivers/net/ethernet/stmicro/stmmac/hwif.h

View file

10

drivers/net/ethernet/stmicro/stmmac/norm_desc.c

View file

6

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

View file