diff options
| author |   Ido Schimmel <idosch@mellanox.com> | 2019-09-15 09:46:36 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-09-16 21:39:27 +0200 |
| commit | bef17466811b9f559d1dba3ebbfbd01a880c89a2 (patch) | |
| tree | db3d398fe5737b425daebfbf7cccb46117cc3bec /net/core/drop_monitor.c | |
| parent | netdevsim: Set offsets to various protocol layers (diff) | |
| download | linux-dev-bef17466811b9f559d1dba3ebbfbd01a880c89a2.tar.xz linux-dev-bef17466811b9f559d1dba3ebbfbd01a880c89a2.zip | |
drop_monitor: Better sanitize notified packets
When working in 'packet' mode, drop monitor generates a notification
with a potentially truncated payload of the dropped packet. The payload
is copied from the MAC header, but I forgot to check that the MAC header
was set, so do it now.
Fixes: ca30707dee2b ("drop_monitor: Add packet alert mode")
Fixes: 5e58109b1ea4 ("drop_monitor: Add support for packet alert mode for hardware drops")
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/drop_monitor.c')
| -rw-r--r-- | net/core/drop_monitor.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c index cc60cc22e2db..536e032d95c8 100644 --- a/net/core/drop_monitor.c +++ b/net/core/drop_monitor.c @@ -487,6 +487,9 @@ static void net_dm_packet_trace_kfree_skb_hit(void *ignore, struct sk_buff *nskb; unsigned long flags; + if (!skb_mac_header_was_set(skb)) + return; + nskb = skb_clone(skb, GFP_ATOMIC); if (!nskb) return; @@ -900,6 +903,9 @@ net_dm_hw_packet_probe(struct sk_buff *skb, struct sk_buff *nskb; unsigned long flags; + if (!skb_mac_header_was_set(skb)) + return; + nskb = skb_clone(skb, GFP_ATOMIC); if (!nskb) return; |