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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2019-08-24 17:49:55 +0300 |
|---|---|---|
| committer | Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> | 2019-11-04 22:45:29 +0300 |
| commit | 30b7244d79651460ff114ba8f7987ed94c86b99a (patch) | |
| tree | 0de5edde505b40c670c873af96b35f03ab4e56bf /net | |
| parent | 3da09663209d6732c74cb7b6d5890b8dea9cf6f3 (diff) | |
| download | linux-30b7244d79651460ff114ba8f7987ed94c86b99a.tar.xz | |
netfilter: ipset: Fix an error code in ip_set_sockfn_get()
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>
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 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); |