From a6d2a5a92e67d151c98886babdc86d530d27111c Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Sat, 13 Apr 2019 17:00:26 +0100 Subject: RDMA/cxgb4: Fix null pointer dereference on alloc_skb failure Currently if alloc_skb fails to allocate the skb a null skb is passed to t4_set_arp_err_handler and this ends up dereferencing the null skb. Avoid the NULL pointer dereference by checking for a NULL skb and returning early. Addresses-Coverity: ("Dereference null return") Fixes: b38a0ad8ec11 ("RDMA/cxgb4: Set arp error handler for PASS_ACCEPT_RPL messages") Signed-off-by: Colin Ian King Acked-by: Potnuri Bharat Teja Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/cxgb4/cm.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/infiniband/hw/cxgb4/cm.c') diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index 1e68d87b663d..0f3b1193d5f8 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -460,6 +460,8 @@ static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) skb_reset_transport_header(skb); } else { skb = alloc_skb(len, gfp); + if (!skb) + return NULL; } t4_set_arp_err_handler(skb, NULL, NULL); return skb; -- cgit v1.2.3-59-g8ed1b