From: Pablo Neira Ayuso <pablo@netfilter.org> To: netfilter-devel@vger.kernel.org Cc: davem@davemloft.net, netdev@vger.kernel.org Subject: [PATCH 2/9] netfilter: ipset: Fix an error code in ip_set_sockfn_get() Date: Wed, 6 Nov 2019 12:12:30 +0100 Message-ID: <20191106111237.3183-3-pablo@netfilter.org> (raw) In-Reply-To: <20191106111237.3183-1-pablo@netfilter.org> From: Dan Carpenter <dan.carpenter@oracle.com> 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> --- net/netfilter/ipset/ip_set_core.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c index e64d5f9a89dd..e7288eab7512 100644 --- a/net/netfilter/ipset/ip_set_core.c +++ b/net/netfilter/ipset/ip_set_core.c @@ -2069,8 +2069,9 @@ 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: { @@ -2129,7 +2130,8 @@ 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); -- 2.11.0
next prev parent reply index Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-11-06 11:12 [PATCH 0/9] Netfilter fixes for net Pablo Neira Ayuso 2019-11-06 11:12 ` [PATCH 1/9] netfilter: nf_tables_offload: check for register data length mismatches Pablo Neira Ayuso 2019-11-06 11:12 ` Pablo Neira Ayuso [this message] 2019-11-06 11:12 ` [PATCH 3/9] netfilter: ipset: Copy the right MAC address in hash:ip,mac IPv6 sets Pablo Neira Ayuso 2019-11-06 11:12 ` [PATCH 4/9] netfilter: ipset: Fix nla_policies to fully support NL_VALIDATE_STRICT Pablo Neira Ayuso 2019-11-06 11:12 ` [PATCH 5/9] netfilter: nf_tables: Align nft_expr private data to 64-bit Pablo Neira Ayuso 2019-11-06 11:12 ` [PATCH 6/9] netfilter: nf_tables: fix unexpected EOPNOTSUPP error Pablo Neira Ayuso 2019-11-06 11:12 ` [PATCH 7/9] bridge: ebtables: don't crash when using dnat target in output chains Pablo Neira Ayuso 2019-11-06 11:12 ` [PATCH 8/9] netfilter: nf_tables: bogus EOPNOTSUPP on basechain update Pablo Neira Ayuso 2019-11-06 11:12 ` [PATCH 9/9] netfilter: nf_tables_offload: skip EBUSY on chain update Pablo Neira Ayuso 2019-11-07 5:17 ` [PATCH 0/9] Netfilter fixes for net David Miller
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