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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2019-04-30 13:44:19 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-30 11:02:37 -0400 |
| commit | f949a12fd697479f68d99dc65e9bbab68ee49043 (patch) | |
| tree | 983664237abc90e605ef1ba16230d74132d8f6cd | |
| parent | b13023421b5179413421333f602850914f6a7ad8 (diff) | |
| download | linux-f949a12fd697479f68d99dc65e9bbab68ee49043.tar.bz2 | |
net: dsa: bcm_sf2: fix buffer overflow doing set_rxnfc
The "fs->location" is a u32 that comes from the user in ethtool_set_rxnfc().
We can't pass unclamped values to test_bit() or it results in an out of
bounds access beyond the end of the bitmap.
Fixes: 7318166cacad ("net: dsa: bcm_sf2: Add support for ethtool::rxnfc")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/dsa/bcm_sf2_cfp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/dsa/bcm_sf2_cfp.c b/drivers/net/dsa/bcm_sf2_cfp.c index e6234d209787..4212bc4a5f31 100644 --- a/drivers/net/dsa/bcm_sf2_cfp.c +++ b/drivers/net/dsa/bcm_sf2_cfp.c @@ -886,6 +886,9 @@ static int bcm_sf2_cfp_rule_set(struct dsa_switch *ds, int port, fs->m_ext.data[1])) return -EINVAL; + if (fs->location != RX_CLS_LOC_ANY && fs->location >= CFP_NUM_RULES) + return -EINVAL; + if (fs->location != RX_CLS_LOC_ANY && test_bit(fs->location, priv->cfp.used)) return -EBUSY; @@ -974,6 +977,9 @@ static int bcm_sf2_cfp_rule_del(struct bcm_sf2_priv *priv, int port, u32 loc) struct cfp_rule *rule; int ret; + if (loc >= CFP_NUM_RULES) + return -EINVAL; + /* Refuse deleting unused rules, and those that are not unique since * that could leave IPv6 rules with one of the chained rule in the * table. |