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infiniband: avoid dereferencing uninitialized dst on error path 

With commit eea40b8f62 ("infiniband: call ipv6 route lookup
via the stub interface"), if the route lookup fails due to
ipv6 being disabled, the dst variable is left untouched, and
the following dst_release() may access uninitialized memory.

Since ipv6_dst_lookup() always sets dst to NULL in case of
lookup failure with ipv6 enabled, fix the above just
returning the error code if the lookup fails.

Fixes: eea40b8f62 ("infiniband: call ipv6 route lookup via the stub interface")
Reported-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Paolo Abeni 2017-05-02 16:03:58 +02:00 committed by Doug Ledford
parent 87f0faadc6
commit 24b43c9964
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/core/addr.c
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@ -446,7 +446,7 @@ static int addr6_resolve(struct sockaddr_in6 *src_in,
ret = ipv6_stub->ipv6_dst_lookup(addr->net, NULL, &dst, &fl6);
if (ret < 0)
goto put;
return ret;
rt = (struct rt6_info *)dst;
if (ipv6_addr_any(&fl6.saddr)) {