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| author | Paolo Abeni <pabeni@redhat.com> | 2019-03-06 10:42:53 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-03-06 10:23:18 -0800 |
| commit | 22c74764aa2943ecdf9f07c900d8a9c8ba6c9265 (patch) | |
| tree | 44693948394b290d37255d46367355fef53eb8bd /net/ipv4/af_inet.c | |
| parent | f4772dee101c7ac66e395d07b3140d457901fa18 (diff) | |
| download | linux-22c74764aa2943ecdf9f07c900d8a9c8ba6c9265.tar.gz | |
ipv4/route: fail early when inet dev is missing
If a non local multicast packet reaches ip_route_input_rcu() while
the ingress device IPv4 private data (in_dev) is NULL, we end up
doing a NULL pointer dereference in IN_DEV_MFORWARD().
Since the later call to ip_route_input_mc() is going to fail if
!in_dev, we can fail early in such scenario and avoid the dangerous
code path.
v1 -> v2:
- clarified the commit message, no code changes
Reported-by: Tianhao Zhao <tizhao@redhat.com>
Fixes: e58e41596811 ("net: Enable support for VRF with ipv4 multicast")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/af_inet.c')
0 files changed, 0 insertions, 0 deletions