diff options
| author | Ido Schimmel | 2020-07-27 10:18:34 +0300 |
|---|---|---|
| committer | David S. Miller | 2020-07-27 11:39:55 -0700 |
| commit | 73cb11933c414b744193d9de660010082bc0a944 (patch) | |
| tree | b38c814d7409a61a570b80fd6008b8f3a4b989de /net/ipv4 | |
| parent | a4e3ee7d20efba343e5846c8b0b17cc778c30c65 (diff) | |
ipmr: Copy option to correct variable
Cited commit mistakenly copied provided option to 'val' instead of to
'mfc':
```
- if (copy_from_user(&mfc, optval, sizeof(mfc))) {
+ if (copy_from_sockptr(&val, optval, sizeof(val))) {
```
Fix this by copying the option to 'mfc'.
selftest router_multicast.sh before:
$ ./router_multicast.sh
smcroutectl: Unknown or malformed IPC message 'a' from client.
smcroutectl: failed removing multicast route, does not exist.
TEST: mcast IPv4 [FAIL]
Multicast not received on first host
TEST: mcast IPv6 [ OK ]
smcroutectl: Unknown or malformed IPC message 'a' from client.
smcroutectl: failed removing multicast route, does not exist.
TEST: RPF IPv4 [FAIL]
Multicast not received on first host
TEST: RPF IPv6 [ OK ]
selftest router_multicast.sh after:
$ ./router_multicast.sh
TEST: mcast IPv4 [ OK ]
TEST: mcast IPv6 [ OK ]
TEST: RPF IPv4 [ OK ]
TEST: RPF IPv6 [ OK ]
Fixes: 01ccb5b48f08 ("net/ipv4: switch ip_mroute_setsockopt to sockptr_t")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/ipmr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index cdf3a40f9ff5..876fd6ff1ff9 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -1441,7 +1441,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, sockptr_t optval, ret = -EINVAL; break; } - if (copy_from_sockptr(&val, optval, sizeof(val))) { + if (copy_from_sockptr(&mfc, optval, sizeof(mfc))) { ret = -EFAULT; break; } |