diff options
author | Dan Carpenter <dan.carpenter@oracle.com> | 2019-08-24 17:49:55 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-12 19:18:09 +0100 |
commit | ef1bf406881d61512911b56c77e96a1489f136b6 (patch) | |
tree | 3349a092e440f5538741dd4ea17a35ee57437c3e /net | |
parent | f8385a4e9ed83dc727aa51cdc51c23a37159c181 (diff) |
netfilter: ipset: Fix an error code in ip_set_sockfn_get()
commit 30b7244d79651460ff114ba8f7987ed94c86b99a upstream.
The copy_to_user() function returns the number of bytes remaining to be
copied. In this code, that positive return is checked at the end of the
function and we return zero/success. What we should do instead is
return -EFAULT.
Fixes: a7b4f989a629 ("netfilter: ipset: IP set core support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r-- | net/netfilter/ipset/ip_set_core.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c index dbf17d3596a6..94d74ec61f42 100644 --- a/net/netfilter/ipset/ip_set_core.c +++ b/net/netfilter/ipset/ip_set_core.c @@ -1950,8 +1950,9 @@ ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len) } req_version->version = IPSET_PROTOCOL; - ret = copy_to_user(user, req_version, - sizeof(struct ip_set_req_version)); + if (copy_to_user(user, req_version, + sizeof(struct ip_set_req_version))) + ret = -EFAULT; goto done; } case IP_SET_OP_GET_BYNAME: { @@ -2008,7 +2009,8 @@ ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len) } /* end of switch(op) */ copy: - ret = copy_to_user(user, data, copylen); + if (copy_to_user(user, data, copylen)) + ret = -EFAULT; done: vfree(data); |