From b5aaab12b2b4bc4acab7384c17a87f3406e5047d Mon Sep 17 00:00:00 2001 From: Or Gerlitz Date: Wed, 29 Jan 2014 18:08:59 +0200 Subject: [PATCH] net/ipv4: Use non-atomic allocation of udp offloads structure instance Since udp_add_offload() can be called from non-sleepable context e.g under this call tree from the vxlan driver use case: vxlan_socket_create() <-- holds the spinlock -> vxlan_notify_add_rx_port() -> udp_add_offload() <-- schedules we should allocate the udp_offloads structure in atomic manner. Fixes: b582ef0 ('net: Add GRO support for UDP encapsulating protocols') Reported-by: Dan Carpenter Signed-off-by: Or Gerlitz Signed-off-by: David S. Miller --- net/ipv4/udp_offload.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c index 25f5cee3a08a..2ffea6f31efc 100644 --- a/net/ipv4/udp_offload.c +++ b/net/ipv4/udp_offload.c @@ -101,7 +101,7 @@ static struct sk_buff *udp4_ufo_fragment(struct sk_buff *skb, int udp_add_offload(struct udp_offload *uo) { struct udp_offload_priv __rcu **head = &udp_offload_base; - struct udp_offload_priv *new_offload = kzalloc(sizeof(*new_offload), GFP_KERNEL); + struct udp_offload_priv *new_offload = kzalloc(sizeof(*new_offload), GFP_ATOMIC); if (!new_offload) return -ENOMEM; -- GitLab