diff options
| author | Yuan Can <yuancan@huawei.com> | 2022-11-29 01:39:34 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-11-29 08:44:24 -0800 |
| commit | 7a945ce0c19bbdf821d5f7ce1515e7fb8e444465 (patch) | |
| tree | c73ac81f7f64668556960d25b6e4d2ea880d942a /net/ipv4 | |
| parent | a61474c41e8c530c54a26db4f5434f050ef7718d (diff) | |
| download | linux-7a945ce0c19bbdf821d5f7ce1515e7fb8e444465.tar.bz2 | |
udp_tunnel: Add checks for nla_nest_start() in __udp_tunnel_nic_dump_write()
As the nla_nest_start() may fail with NULL returned, the return value
should be checked.
Note that this is not a real bug, nothing will break here.
The next nla_put() will fail as well and we'll bail (and
nla_nest_cancel() can handle NULL). But we keep getting
those "fixes" so whatever.
Signed-off-by: Yuan Can <yuancan@huawei.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20221129013934.55184-1-yuancan@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/udp_tunnel_nic.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/udp_tunnel_nic.c b/net/ipv4/udp_tunnel_nic.c index bc3a043a5d5c..029219749785 100644 --- a/net/ipv4/udp_tunnel_nic.c +++ b/net/ipv4/udp_tunnel_nic.c @@ -624,6 +624,8 @@ __udp_tunnel_nic_dump_write(struct net_device *dev, unsigned int table, continue; nest = nla_nest_start(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_ENTRY); + if (!nest) + return -EMSGSIZE; if (nla_put_be16(skb, ETHTOOL_A_TUNNEL_UDP_ENTRY_PORT, utn->entries[table][j].port) || |