Amit Choudhary wrote:
> Description: Check the return value of kmalloc() in function wrandom_set_nhinfo(), in file net/ipv4/multipath_wrandom.c.
>
> Signed-off-by: Amit Choudhary <[email protected]>
>
> diff --git a/net/ipv4/multipath_wrandom.c b/net/ipv4/multipath_wrandom.c
> index 92b0482..bcdb1f1 100644
> --- a/net/ipv4/multipath_wrandom.c
> +++ b/net/ipv4/multipath_wrandom.c
> @@ -242,6 +242,9 @@ static void wrandom_set_nhinfo(__be32 ne
> target_route = (struct multipath_route *)
> kmalloc(size_rt, GFP_ATOMIC);
>
> + if (!target_route)
> + goto error;
> +
> target_route->gw = nh->nh_gw;
> target_route->oif = nh->nh_oif;
> memset(&target_route->rcu, 0, sizeof(struct rcu_head));
> @@ -263,6 +266,9 @@ static void wrandom_set_nhinfo(__be32 ne
> target_dest = (struct multipath_dest*)
> kmalloc(size_dst, GFP_ATOMIC);
>
> + if (!target_dest)
> + goto error;
> +
>
> target_dest->nh_info = nh;
> target_dest->network = network;
> target_dest->netmask = netmask;
> @@ -275,6 +281,7 @@ static void wrandom_set_nhinfo(__be32 ne
> * we are finished
> */
>
> + error:
> spin_unlock_bh(&state[state_idx].lock);
> }
Thats slightly better than before, but since no errors are propagated
back to the routing code I think it would still crash later on.
A better idea would be to mark this crap BROKEN until it is really
fixed, so people won't accidentally enable it (which is enough
to cause problems).
Signed-off-by: Patrick McHardy <[email protected]>
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 5572071..9ff5616 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -124,8 +124,8 @@ config IP_ROUTE_MULTIPATH
if a matching packet arrives.
config IP_ROUTE_MULTIPATH_CACHED
- bool "IP: equal cost multipath with caching support (EXPERIMENTAL)"
- depends on IP_ROUTE_MULTIPATH
+ bool "IP: equal cost multipath with caching support (BROKEN)"
+ depends on IP_ROUTE_MULTIPATH && BROKEN
help
Normally, equal cost multipath routing is not supported by the
routing cache. If you say Y here, alternative routes are cached
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