* [PATCH] net: dsa: bcm_sf2: fix buffer overflow doing set_rxnfc
@ 2019-04-30 10:44 ` Dan Carpenter
0 siblings, 0 replies; 4+ messages in thread
From: Dan Carpenter @ 2019-04-30 10:44 UTC (permalink / raw)
To: Andrew Lunn
Cc: Vivien Didelot, Florian Fainelli, David S. Miller, netdev,
kernel-janitors
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>
---
drivers/net/dsa/bcm_sf2_cfp.c | 6 ++++++
1 file changed, 6 insertions(+)
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.
--
2.18.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH] net: dsa: bcm_sf2: fix buffer overflow doing set_rxnfc
@ 2019-04-30 10:44 ` Dan Carpenter
0 siblings, 0 replies; 4+ messages in thread
From: Dan Carpenter @ 2019-04-30 10:44 UTC (permalink / raw)
To: Andrew Lunn
Cc: Vivien Didelot, Florian Fainelli, David S. Miller, netdev,
kernel-janitors
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>
---
drivers/net/dsa/bcm_sf2_cfp.c | 6 ++++++
1 file changed, 6 insertions(+)
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.
--
2.18.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] net: dsa: bcm_sf2: fix buffer overflow doing set_rxnfc
2019-04-30 10:44 ` Dan Carpenter
@ 2019-04-30 15:04 ` David Miller
-1 siblings, 0 replies; 4+ messages in thread
From: David Miller @ 2019-04-30 15:04 UTC (permalink / raw)
To: dan.carpenter; +Cc: andrew, vivien.didelot, f.fainelli, netdev, kernel-janitors
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Tue, 30 Apr 2019 13:44:19 +0300
> 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>
Applied and queued up for -stable, thanks Dan.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] net: dsa: bcm_sf2: fix buffer overflow doing set_rxnfc
@ 2019-04-30 15:04 ` David Miller
0 siblings, 0 replies; 4+ messages in thread
From: David Miller @ 2019-04-30 15:04 UTC (permalink / raw)
To: dan.carpenter; +Cc: andrew, vivien.didelot, f.fainelli, netdev, kernel-janitors
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Tue, 30 Apr 2019 13:44:19 +0300
> 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>
Applied and queued up for -stable, thanks Dan.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-04-30 15:04 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2019-04-30 10:44 [PATCH] net: dsa: bcm_sf2: fix buffer overflow doing set_rxnfc Dan Carpenter
2019-04-30 10:44 ` Dan Carpenter
2019-04-30 15:04 ` David Miller
2019-04-30 15:04 ` David Miller
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