[PATCH] xdp: ensure initialization of txq in xdp_buff

[Paul Hollinsky]

xdp->txq was uninitialized and could be used from within a bpf program.

https://syzkaller.appspot.com/bug?id=a6e53f8e9044ea456ea1636be970518ae6ba7f62

Signed-off-by: Paul Hollinsky <phollin...@holtechnik.com>
---
 net/core/dev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/core/dev.c b/net/core/dev.c
index 7df6c9617321..12be8fef8b7e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4649,6 +4649,8 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb,
        rxqueue = netif_get_rxqueue(skb);
        xdp->rxq = &rxqueue->xdp_rxq;
 
+       xdp->txq = NULL;
+
        act = bpf_prog_run_xdp(xdp_prog, xdp);
 
        /* check if bpf_xdp_adjust_head was used */
-- 
2.25.1