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authorFlorian Fainelli <f.fainelli@gmail.com>2018-05-15 16:01:23 -0700
committerDavid S. Miller <davem@davemloft.net>2018-05-16 14:11:22 -0400
commit43a5e00f38fe8933a1c716bfe5b30e97f749d94b (patch)
tree76373179f27fac7fc28f5cadf60546fe9750f9af /drivers
parente1b505a60366399d735312ca38b0a6753a684123 (diff)
net: dsa: bcm_sf2: Fix RX_CLS_LOC_ANY overwrite for last rule
When we let the kernel pick up a rule location with RX_CLS_LOC_ANY, we would be able to overwrite the last rules because of a number of issues. The IPv4 code path would not be checking that rule_index is within bounds, and it would also only be allowed to pick up rules from range 0..126 instead of the full 0..127 range. This would lead us to allow overwriting the last rule when we let the kernel pick-up the location. Fixes: 3306145866b6 ("net: dsa: bcm_sf2: Move IPv4 CFP processing to specific functions") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/dsa/bcm_sf2_cfp.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/dsa/bcm_sf2_cfp.c b/drivers/net/dsa/bcm_sf2_cfp.c
index 23b45da784cb..9e04786e3139 100644
--- a/drivers/net/dsa/bcm_sf2_cfp.c
+++ b/drivers/net/dsa/bcm_sf2_cfp.c
@@ -354,10 +354,13 @@ static int bcm_sf2_cfp_ipv4_rule_set(struct bcm_sf2_priv *priv, int port,
/* Locate the first rule available */
if (fs->location == RX_CLS_LOC_ANY)
rule_index = find_first_zero_bit(priv->cfp.used,
- bcm_sf2_cfp_rule_size(priv));
+ priv->num_cfp_rules);
else
rule_index = fs->location;
+ if (rule_index > bcm_sf2_cfp_rule_size(priv))
+ return -ENOSPC;
+
layout = &udf_tcpip4_layout;
/* We only use one UDF slice for now */
slice_num = bcm_sf2_get_slice_number(layout, 0);